Davey's Horizontal Multistage Water Pump With Torrium2 - HM160-19T
Key features:
- Standard automatic pressure system type.
- Suitable for larger households and offices (7 shower heads with 10 pipes).
- For household, garden, farming, and agricultural use.
- 24 months warranty for pump, motor & controller.
(24 + 6 additional months with e-Warranty scheme) - Fixed pressure setting on every usage.
- Easy installation, no setting required.
Classified As:
Davey's Horizontal Multistage Water Pump With Torrium2 - HM160-19T
As the flagship model in Davey Water Products’ Horizontal Multistage pump range, the HM160-19T is engineered to deliver exceptional water pressure for demanding residential and light commercial applications. Powered by a 1.5 kW (P2) motor, this high-performance centrifugal pump provides sufficient pressure to supply water to buildings of up to three storeys. Under suitable plumbing conditions, it is capable of supporting up to seven shower heads and ten water outlets simultaneously, ensuring reliable water pressure even during peak usage.
Its outstanding hydraulic performance is achieved through a series of precision-engineered stainless steel impellers arranged in multiple stages. As water passes through each stage, pressure is progressively increased before being discharged, providing consistent flow and high-pressure performance. This makes the HM160-19T an ideal choice for shop lots, large homes, and other properties with substantial water demand.
Built for long-term durability, the HM160-19T incorporates premium 304-grade stainless steel for most hydraulic components that come into direct contact with water, offering excellent resistance to corrosion and wear. The motor shaft is manufactured from higher-grade 316 stainless steel, delivering superior strength and corrosion resistance in demanding operating environments. Combined with a robust alloy pump housing and a Totally Enclosed Fan Cooled (TEFC) motor, the HM160-19T is designed to provide dependable performance and extended service life in domestic, commercial, and light industrial installations.
*Exclusive Feature: The HM60, HM90, and HM160 Series are engineered to withstand up to 200 start-stop cycles per hour, a capability validated through rigorous testing by Davey’s Production and Research & Development teams. This enhanced cycling performance helps minimise wear caused by frequent pump operation, reduces the risk of leakage, and ensures reliable performance in systems with fluctuating water demand.
Electric Pump's Method of Identification
To ensure efficient product traceability throughout manufacturing, inventory management, and global distribution, the Horizontal Multistage HM160-19T follows a standardised product naming convention adopted by Davey Water Products and Waterco. This systematic model designation also supports internal quality control and ISO-compliant auditing processes.
The HM160-19T model code is interpreted as follows:
1) HM – The abbreviated product series, representing the Horizontal Multistage pump range.
2) 160 – The nominal flow rate at the pump’s Best Efficiency Point (BEP), measured in litres per minute (L/min).
3) 19 – The motor power rating of 1.9 kW.
4) T – Indicates that the pump is supplied with an integrated Torrium2 pump controller.
The HM160-19T model designation is designed to provide a quick and meaningful reference to the pump’s key specifications.
The “HM” prefix identifies the pump as part of Davey’s Horizontal Multistage series. The number “160” represents the pump’s nominal flow rate at its Best Efficiency Point (BEP), measured at 160 litres per minute (L/min). The “15” indicates the pump’s 1.5 kW motor power, while the suffix “T” signifies that the unit is supplied with an integrated Torrium2 intelligent pump controller.
The Torrium2 controller continuously monitors the water system and automatically starts or stops the pump based on demand. Its adaptive control logic helps maintain consistent water pressure while reducing unnecessary pump cycling, minimising wear and extending the service life of both the pump and its components.
Beyond identifying the product’s specifications, the HM160-19T model code and unique Stock Keeping Unit (SKU) play an important role in inventory management across Davey Malaysia’s distribution network. Standardised product identification enables faster warehouse processing, efficient order fulfilment, and accurate stock control.
The model identification also assists plumbers, technicians, and service personnel in verifying the exact pump installed at a property. This simplifies maintenance, ensures compatibility when ordering replacement parts, and allows repairs to be carried out accurately and efficiently, helping to maximise the operational lifespan of the HM160-19T Horizontal Multistage water pump.
Attachment
Torrium2
The Torrium2 Intelligent Pressure Controller is designed to automatically maintain consistent water pressure throughout your plumbing system by responding instantly to changes in water demand. Integrated with the HM160-19T Horizontal Multistage water pump, the controller continuously monitors system pressure to ensure reliable and efficient operation.
Whenever a tap, shower, or irrigation valve is opened, the resulting drop in water pressure is immediately detected by the Torrium2 controller, which automatically starts the pump. Once water demand ceases, the controller switches the pump off accordingly. Throughout operation, Torrium2 helps maintain stable water pressure for a more comfortable user experience while also providing built-in dry-run protection to safeguard the pump from operating without an adequate water supply.
One of the key advantages of the Torrium2 Intelligent Pressure Controller is its adaptive control technology. By monitoring household water usage patterns, the controller optimises pump operation to minimise unnecessary start-stop cycles, reducing mechanical wear and extending the service life of the pump. The result is greater energy efficiency, more stable water pressure, and dependable long-term performance for residential and light commercial water supply systems.
Mechanical Pressure Switch
As an alternative to the Torrium2 Intelligent Pressure Controller, the HM160-19T can also be paired with a conventional mechanical pressure switch. This is a more economical solution that controls pump operation based solely on system pressure. Unlike electronic controllers, a mechanical pressure switch does not utilise sensors, microprocessors, or adaptive control technology. Instead, it operates using a spring-loaded diaphragm and electrical contacts to start and stop the pump at predetermined pressure settings.
The pressure switch functions by establishing fixed cut-in and cut-out pressure thresholds. When the water pressure falls below the cut-in setting, the switch closes the electrical circuit and starts the pump. As the pump restores pressure within the system, it continues operating until the cut-out pressure is reached, at which point the switch opens the circuit and stops the pump.
For example:
- Below 20 psi (1.4 bar): The pressure drops below the cut-in setting, causing the HM160-19T to start automatically.
- Between 20 and 40 psi (1.4–2.8 bar): The pump continues operating to maintain water pressure throughout the system.
- At 40 psi (2.8 bar): The pressure reaches the cut-out setting, and the mechanical pressure switch disconnects the electrical supply, stopping the pump.
Important: A pressure tank must be installed when using a mechanical pressure switch. The pressure tank stores pressurised water and reduces frequent pump cycling, allowing the pressure switch and the Davey Horizontal Multistage pump to operate efficiently while helping to extend the lifespan of the pumping system.
Pressure Tank
A pressure tank is a sealed vessel designed to store water under pressure using compressed air. When installed alongside a mechanical pressure switch, it provides a steady water supply while significantly reducing the frequency of pump starts and stops. This not only improves system efficiency but also helps extend the service life of the pump.
Inside the pressure tank are two separate chambers divided by a durable rubber diaphragm. One chamber stores water, while the other contains compressed air. As the Horizontal Multistage pump fills the tank, the air chamber becomes compressed, storing energy in the form of pressure.
When a tap, shower, or other water outlet is opened, the compressed air forces water out of the tank and into the plumbing system without requiring the pump to start immediately. As water is drawn from the tank, the system pressure gradually decreases. Once the pressure reaches the preset cut-in point of the mechanical pressure switch, the Horizontal Multistage water pump automatically starts to replenish the tank and restore the system to its designated operating pressure. This cycle ensures consistent water pressure while minimising unnecessary pump operation and mechanical wear.
Certification
Davey’s Horizontal Multistage water pumps, including the HM160-19T, are manufactured to comply with a range of internationally recognised standards and certifications. These accreditations are essential not only for regulatory compliance and global market access, but also for demonstrating the product’s safety, quality, reliability, and long-term performance.
Meeting recognised international standards enables Davey to supply its Horizontal Multistage pumps to markets around the world while satisfying local legislative and technical requirements. These certifications also provide customers with greater confidence that each pump has been independently assessed or manufactured in accordance with stringent engineering and quality benchmarks.
Beyond regulatory compliance, certification reflects Davey’s commitment to continuous product development. Every stage of the design, manufacturing, and testing process is carried out to ensure the HM160-19T delivers dependable performance, electrical safety, mechanical reliability, and safe operation throughout its service life.
SGS Verification: Products assessed by SGS (Société Générale de Surveillance) undergo independent evaluation to verify that they meet the manufacturer’s stated specifications and performance claims. For the Horizontal Multistage pump range, this includes assessments relating to hydraulic performance, material quality, electrical safety, and overall product reliability. Independent verification reinforces confidence that the pump performs as specified while maintaining a high level of consumer safety.
European Standards: To supply products within the European market, Davey’s Horizontal Multistage pumps are designed to comply with applicable European Ecodesign Regulations governing the energy efficiency of water pumps.
These regulations establish minimum efficiency requirements while promoting:
- Reduced electricity consumption
- Lower operating costs
- Improved hydraulic efficiency
- Reduced greenhouse gas emissions
- Enhanced environmental sustainability
Compliance also helps ensure that pumps meet rigorous safety and performance expectations, reducing the risk of mechanical failure, leakage, or electrical hazards.
International Electrotechnical Commission (IEC): The International Electrotechnical Commission (IEC) establishes globally recognised standards for electrical and electronic equipment.
Compliance with relevant IEC standards covers areas including:
- Electric motor safety
- Electrical insulation and protection
- Control system reliability
- Performance testing
- Electrical compatibility with auxiliary equipment such as Variable Frequency Drives (VFDs)
Adhering to IEC requirements helps minimise risks associated with electric shock, overheating, short circuits, and fire, while ensuring dependable electrical performance across different installation environments.
Australian Standards: As an Australian manufacturer, Davey designs its products in accordance with applicable Australian Standards, which are widely recognised for promoting product safety, performance, and quality. Compliance with these standards reinforces customer confidence throughout Australia, New Zealand, Southeast Asia, and many international markets by demonstrating that the HM160-19T has been developed to meet demanding engineering and safety requirements.
- AS 4020:2005 – Products in Contact with Drinking Water: One of the most significant standards applicable to potable water systems is AS 4020:2005. This standard evaluates materials that come into contact with drinking water to ensure they do not leach harmful substances, alter taste or odour, or negatively affect water quality. Compliance demonstrates that the materials used within the Horizontal Multistage pump are suitable for continuous contact with potable water.
Standards New Zealand: For distribution within New Zealand, Davey products also comply with the relevant requirements recognised under Standards New Zealand. This certification facilitates regulatory acceptance while assuring customers that the products satisfy the country’s performance and safety expectations.
ISO 9001:2015: The internationally recognised standard for Quality Management Systems (QMS). Certification demonstrates Davey’s commitment to consistently manufacturing water pumps and related products that satisfy both customer expectations and regulatory requirements. It also requires continuous improvement throughout production, helping ensure consistent product quality across every manufacturing batch.
ISO 14001: recognises organisations that implement effective environmental management systems. For Davey, this reflects a commitment to reducing environmental impact throughout manufacturing by improving resource efficiency, minimising waste, increasing recycling initiatives where practical, and continually improving sustainable manufacturing practices.
TÜV SÜD Certification: The HM160 Horizontal Multistage series are independently assessed by TÜV SÜD, one of the world’s leading product testing and certification organisations. TÜV SÜD certification provides additional assurance that the pump has undergone rigorous independent testing for safety, quality, performance, and compliance with applicable engineering requirements.
Collectively, these certifications demonstrate Davey’s commitment to engineering excellence, product safety, environmental responsibility, and manufacturing consistency. More than regulatory requirements, they represent independent verification that the HM160-19T has been designed, manufactured, and tested to meet internationally recognised standards.
For customers, installers, engineers, and distributors alike, these accreditations provide confidence that every Davey Horizontal Multistage water pump delivers reliable performance, dependable operation, and lasting quality wherever it is installed.
Single-Speed, TEFC Motor
The HM160-19T is equipped with a Totally Enclosed Fan Cooled (TEFC) motor that operates at a fixed speed, delivering dependable and consistent performance for domestic and light commercial water pressure applications. Designed to protect the motor from dust, dirt, moisture, and other environmental contaminants, the TEFC construction enhances durability while requiring minimal maintenance throughout its service life.
The motor is completely enclosed, preventing external contaminants from entering the electrical components. Cooling is achieved by an external fan mounted to the motor shaft, which continuously circulates air over the motor housing to dissipate heat during operation without exposing the internal windings to the surrounding environment.
Within the HM160-19T, the hydraulic section—where water flows through the pump—is isolated from the motor by a mechanical seal and backplate assembly. Under normal operating conditions, this separation prevents water from entering the motor compartment, protecting the electrical components from moisture and ensuring safe, reliable operation. Water intrusion would typically occur only in the unlikely event of a mechanical seal or backplate failure.
Plug-and-Use Convenience: The HM160-19T is supplied as a fully assembled pump and motor unit, allowing for straightforward installation with minimal setup requirements. Once correctly connected to the plumbing system and electrical supply, the pump is ready for operation without additional motor configuration or commissioning, making installation faster and more convenient for both homeowners and professional installers.
Over 200 Starts Per Hour: One of the standout features of Davey’s Horizontal Multistage pump range is its ability to withstand more than 200 start-stop cycles per hour. This capability is the result of extensive engineering, product development, and validation testing carried out by Davey’s Production and Research & Development teams.
Frequent pump cycling is a common cause of premature wear in water pressure systems, often resulting from minor leaks, fluctuating water demand, or intermittent usage throughout a property. To address these real-world operating conditions, the HM160-19T has been engineered to tolerate exceptionally high cycling rates without compromising reliability or performance. This robust design helps extend pump life and ensures dependable operation in demanding residential and commercial applications.
Proven TEFC Motor Technology: The HM160-19T is powered by a Totally Enclosed Fan Cooled (TEFC) motor—a proven motor design that has earned a long-standing reputation for durability and reliability across a wide range of industrial and water pumping applications.
Its enclosed construction protects the motor from dust, dirt, and moisture, while the external cooling fan efficiently dissipates heat during operation. With fewer components exposed to environmental contaminants, the TEFC motor requires minimal maintenance and delivers consistent performance over many years of service.
Lower Maintenance, Lower Operating Costs: The combination of a durable TEFC motor, corrosion-resistant hydraulic components, and Davey’s high-quality engineering contributes to lower ownership costs throughout the pump’s lifespan. By minimising routine maintenance requirements and reducing wear caused by frequent operation, the HM160-19T helps lower servicing expenses while maintaining dependable performance. Whether installed in a residential home, shop lot, or light commercial property, the pump is designed to provide long-term value through reliable operation, reduced downtime, and an extended service life.
Infographic: HM160-19T in Residential Applications
The Davey HM160-19T Horizontal Multistage water pump represents one of the higher-capacity models within the HM Series, making it suitable for larger residential properties, including three-storey homes, as well as office and light commercial applications.
To simplify pump selection and provide a clearer understanding of its intended applications, Davey Malaysia’s engineering team has developed an illustrated household pump selection guide. This infographic serves as a practical reference, helping users identify the appropriate pump solution based on building size, water demand, and system requirements.
The Davey HM160-19T Horizontal Multistage water pump represents one of the higher-capacity models within the HM Series, making it suitable for larger residential properties, including three-storey homes, as well as office and light commercial applications.
To simplify pump selection and provide a clearer understanding of its intended applications, Davey Malaysia’s engineering team has developed an illustrated household pump selection guide. This infographic serves as a practical reference, helping users identify the appropriate pump solution based on building size, water demand, and system requirements.
Inlet Sizing
The HM160-19T features a 1.5-inch suction inlet connection, designed to provide efficient water intake into the pump system. While the standard inlet size is fixed, suitable connectors and adaptors can be used to integrate the pump with different piping configurations, allowing professional installers to customise the plumbing layout according to site requirements.
The suction inlet is a critical component of any centrifugal pump, as it serves as the entry point where water is drawn into the hydraulic system before being pressurised and distributed throughout the property. Proper inlet sizing, pipe arrangement, and installation practices are essential to maintaining smooth water flow, reducing restrictions, and ensuring optimal pump efficiency.
As part of Davey’s Horizontal Multistage series, the HM160-19T is specifically designed for clean water applications, delivering consistent and reliable water pressure for residential, office, and light commercial systems. When correctly installed, the pump provides efficient water transfer and dependable performance to meet the demands of larger properties.
One-Directional Flow Design: The Davey HM160-19T Horizontal Multistage pump operates using a unidirectional flow design, where the electric motor drives the impeller stages to create the pressure differential required to draw water into the pump and move it efficiently through the hydraulic system. This controlled flow path allows the pump to deliver consistent pressure performance while maintaining smooth movement of clean water throughout the application.
Reduced Hydraulic Resistance: In centrifugal pump systems, appropriately sized inlet connections help minimise hydraulic losses by allowing water to enter the pump with reduced restriction. A larger suction inlet diameter can improve flow conditions by lowering frictional resistance, supporting smoother water intake and contributing to improved hydraulic efficiency.
The correct balance between inlet sizing, piping configuration, and installation practice is essential to achieving optimal pump performance and maintaining reliable long-term operation.
The following table summarises the HM160-19T inlet and discharge outlet specifications:
240V Single Phase Models | ||
|---|---|---|
Product Code | Ports | |
Suction BSP | Discharge BSP | |
HM160-19 | 1.5 inch F (38.1mm) | 1 inch M (25.4mm) |
Volute
The volute of the HM160-19T Horizontal Multistage pump forms the outer hydraulic casing that encloses the impellers and diffusers. Although its external appearance may resemble a cylindrical structure, the internal passageway is precisely engineered with a spiral geometry to optimise water movement through the pump.
Manufactured from durable, high-quality composite materials, the volute is designed to withstand continuous operating conditions while maintaining structural integrity and hydraulic performance.
The volute plays an important role in the pump’s overall efficiency. As water exits each impeller stage, the spiral-shaped casing gradually collects and directs the fluid towards the discharge outlet. This controlled conversion of velocity into pressure helps improve discharge performance, reduce unnecessary turbulence, and maintain stable flow throughout the system.
By combining robust construction with carefully engineered hydraulic geometry, the HM160-19T volute contributes to reliable pressure delivery and efficient operation across demanding residential and commercial applications.
In addition, the robust volute casing provides an additional layer of protection for the hydraulic assembly by helping shield internal components from external contaminants. This protective structure supports cleaner water delivery, minimises the risk of premature wear, and helps maintain the reliability and longevity of the pumping system under continuous operation.
Energy Transition: In the HM160-19T Horizontal Multistage pump, energy transfer begins when the electric motor drives the impeller assembly, generating the rotational force required to move water through the hydraulic stages. As water enters the pump, each impeller transfers kinetic energy to the fluid, accelerating it outward through centrifugal force toward the surrounding diffuser and volute passages.
As the water progresses through the volute, the increased flow area allows the kinetic energy generated by the impellers to be converted into pressure energy. The reduction in fluid velocity is accompanied by an increase in pressure, producing a controlled discharge flow at the outlet. This hydraulic conversion process follows the principles described by Bernoulli’s equation, which explains the relationship between fluid velocity, pressure, and energy within a flowing system.
Self-Priming Performance: During operation, the pump chamber and hydraulic passages become fully filled with water, allowing stable continuous flow through the impeller stages. Proper removal of trapped air is essential, as air pockets within the hydraulic system can interrupt water movement, reduce efficiency, and create unstable operating conditions.
Excessive air entrainment around the impeller area may contribute to cavitation, a phenomenon where vapour bubbles form and collapse due to pressure changes. Over time, this can reduce hydraulic performance and accelerate component wear. By maintaining effective water filling and stable hydraulic conditions, the HM160-19T is able to deliver reliable pressure performance throughout its intended application.
Impeller And Diffuser
Within the volute chamber, the impellers and diffusers are housed inside a series of precisely engineered stage bodies. These components, sometimes referred to as protection brackets, provide structural support and maintain accurate alignment of the internal hydraulic assemblies throughout operation.
By securely positioning the impellers and diffusers, the stage bodies help ensure stable performance even under high rotational speeds and continuous operating conditions. This precise arrangement allows water to pass smoothly through each hydraulic stage, where pressure is progressively increased to achieve the required discharge performance.
The multi-stage configuration of the Horizontal Multistage water pump enables efficient pressure boosting for a variety of applications, ranging from household taps and showers to larger residential, commercial, and water supply systems requiring consistent and reliable flow.
Closed Impeller Design
The HM160-19T Horizontal Multistage water pump utilises closed impellers that are securely mounted onto the pump shaft to provide efficient fluid transfer while helping to manage axial forces generated during rotation. Featuring enclosed front and rear shrouds, the closed impeller design creates a controlled flow passage that improves hydraulic efficiency and supports reliable pump performance.
Enhanced Hydraulic Performance: The enclosed structure allows water to move smoothly through the impeller vanes before being directed toward the next hydraulic stage or discharge outlet. By reducing unnecessary turbulence and minimising energy losses, the closed impellers contribute to improved efficiency, stable pressure generation, and consistent water delivery throughout the pumping system.
Reduced Risk of Cavitation: The closed impeller configuration helps maintain a stable and continuous water flow through the hydraulic passages, reducing conditions that may encourage air entrainment or pressure fluctuations. By supporting smoother fluid movement, the design helps minimise the likelihood of cavitation-related effects, protecting internal components from excessive vibration, wear, and performance degradation.
Through precise engineering and multi-stage integration, the closed impellers play a critical role in enabling the HM160-19T to deliver dependable pressure performance for demanding residential and commercial water applications.
Extended Service Life: By helping to balance hydraulic forces and reduce axial thrust loads during operation, closed impellers minimise stress placed on critical components such as the pump shaft and bearings. This reduced mechanical strain contributes to lower wear rates, fewer maintenance requirements, and improved operational reliability.
As a result, the HM160-19T Horizontal Multistage centrifugal pump benefits from enhanced durability, extended service life, and dependable long-term performance across continuous water supply applications.
Stainless Steel Impeller And Diffuser Construction: The impellers and diffusers of the HM160-19T Horizontal Multistage water pump are manufactured from premium stainless steel, providing excellent resistance against corrosion, wear, and continuous water exposure. This robust material selection ensures the hydraulic components maintain their strength, reliability, and performance throughout the pump’s service life.
Smooth Surface for Improved Hydraulic Efficiency: Each impeller is precision-finished with a smooth surface to reduce frictional losses and minimise turbulence as water passes through the hydraulic stages. By improving the efficiency of fluid movement and reducing unnecessary hydraulic resistance, the stainless steel impeller design supports consistent pressure delivery while helping to optimise energy usage during operation.
Excellent Thermal Stability: High-grade stainless steel provides strong dimensional stability across a wide range of operating temperatures. Whether handling cold or warm clean water, the impellers and diffusers retain their mechanical strength and structural integrity with minimal expansion or contraction.
This thermal stability allows the HM160-19T to maintain reliable hydraulic performance under varying operating conditions, ensuring dependable water pressure and long-term durability for residential and commercial applications.
Backplate And Mechanical Seal For Motor Protection
The backplate and mechanical seal serve as a critical protective barrier between the hydraulic section and the electric motor assembly of the HM160-19T Horizontal Multistage pump. Their primary function is to isolate the water-filled pumping chamber from the motor compartment, preventing water ingress that could damage electrical components, cause short circuits, or lead to premature motor failure.
A precision-engineered sealing system, including gaskets or sealing washers, is incorporated to enhance the integrity of the assembly. This creates a reliable, leak-resistant connection that helps maintain separation between the hydraulic and electrical sections, supporting safe operation and long-term pump durability.
As the impellers generate centrifugal force to move water efficiently toward the discharge outlet, the backplate and mechanical seal continue to maintain separation between the hydraulic chamber and the electric motor compartment. By preventing water leakage into the motor assembly, these components help protect the electrical system while ensuring reliable pump operation.
Beyond their sealing function, the backplate and mechanical seal assembly also provide structural support for the pump shaft, helping maintain accurate alignment during rotation. This reduces excessive vibration, minimises shaft movement, and promotes smoother mechanical operation.
Through improved stability and protection of critical components, the backplate and mechanical seal contribute to the HM160-19T Horizontal Multistage water pump’s durability, reliability, and extended service life.
Positioned between the backplate and mechanical seal assembly, the circlip serves an important function in maintaining the correct placement and stability of the seal during pump operation. By securing the mechanical seal in position, it helps support consistent sealing performance, accommodates rotational forces, and reduces the risk of water leakage throughout continuous operation.
For the HM80 and HM150 series, this component is not included in the design. Within Davey Water Products’ official documentation, the circlip is identified as a clip spring, and these models are engineered to maintain effective mechanical sealing performance without requiring this additional component.
O-Ring And Spacers
O-rings are strategically installed throughout the HM160-19T Horizontal Multistage water pump to provide reliable, leak-resistant sealing between interconnected components. By preventing water loss at internal joints and interfaces, these seals help maintain hydraulic integrity, improve operating efficiency, and support consistent pump performance.
Manufactured from EPDM (Ethylene Propylene Diene Monomer) rubber, the O-rings offer excellent resistance to heat, water exposure, ageing, and environmental conditions. Compared with many conventional elastomer materials, EPDM provides enhanced durability and stability in applications involving continuous contact with water and elevated operating temperatures.
Within the HM160-19T, multiple O-rings are positioned at critical sealing locations, including areas around the volute casing and hydraulic assembly. This ensures effective containment of pressurised water, reduces the risk of leakage, and contributes to the pump’s long-term reliability and service life.
O-rings are strategically installed throughout the HM160-19T Horizontal Multistage water pump to provide reliable, leak-resistant sealing between interconnected components. By preventing water loss at internal joints and interfaces, these seals help maintain hydraulic integrity, improve operating efficiency, and support consistent pump performance.
Manufactured from EPDM (Ethylene Propylene Diene Monomer) rubber, the O-rings offer excellent resistance to heat, water exposure, ageing, and environmental conditions. Compared with many conventional elastomer materials, EPDM provides enhanced durability and stability in applications involving continuous contact with water and elevated operating temperatures.
Within the HM160-19T, multiple O-rings are positioned at critical sealing locations, including areas around the volute casing and hydraulic assembly. This ensures effective containment of pressurised water, reduces the risk of leakage, and contributes to the pump’s long-term reliability and service life.
Precision Spacers For Stable Operation: Precision spacers are installed between rotating and stationary components within the HM160-19T Horizontal Multistage water pump to maintain accurate clearances throughout the hydraulic assembly. By ensuring the correct spacing between moving parts, these components prevent unwanted contact, reduce friction, and minimise mechanical wear during operation.
Maintaining proper internal alignment and clearance helps protect critical components from premature damage while supporting smoother rotation, improved efficiency, and reliable long-term performance of the pump system.
In addition to maintaining accurate internal clearances, precision spacers help reduce vibration by limiting unnecessary movement between rotating components. This improved stability reduces mechanical stress, supports smoother operation, and helps extend the service life of key components such as bearings and other rotating assemblies.
To achieve long-term durability, the HM160-19T Horizontal Multistage water pump incorporates SUS304 (304 stainless steel) across many of its internal components, including the impellers, mechanical seal housing, spacers, circlip, and volute casing. This corrosion-resistant material provides excellent structural strength, reliability, and resistance to continuous water exposure, making it suitable for demanding water-handling applications.
The pump shaft is manufactured from SUS316 stainless steel, offering enhanced corrosion resistance and superior mechanical strength compared with SUS304. As the primary component responsible for transferring rotational energy from the motor to the impeller assembly, the SUS316 shaft is engineered to withstand continuous mechanical loading while maintaining reliable performance throughout the pump’s service life.
Operating Limits of HM160-19T Water Pump
| Operating Limits | |
| Maximum continuous flow rate | 200L / min (53 US gallons) |
| Maximum operating pressure | 700 kPa* (102 psi) |
| Maximum current | 10 amp |
| Cut-in pressure range | 80% of pump shut-off head |
| Maximum water temperature | 65°C (149°F) |
*Maximum Operating Pressure: The maximum operating pressure may be increased up to 820 kPa, depending on the pressure rating and specifications of the optional pressure tank installed within the system.
*L (Litres): The symbol L represents litres, which is the standard unit used to measure volume.
*kPa (Kilopascal): The kilopascal (kPa) is the standard metric unit used to measure pressure in hydraulic and engineering applications.
*psi (Pounds per Square Inch): The psi is an imperial pressure measurement unit commonly used to indicate water pressure levels in pumping and plumbing systems.
*A (Ampere): The ampere (A) is the standard unit of electrical current, measuring the flow of electric charge through a circuit. It is commonly referred to as an amp.
* °C and °F (Temperature Units): Degrees Celsius (°C) and degrees Fahrenheit (°F) are units used to measure temperature. Celsius is widely adopted internationally, while Fahrenheit is primarily used in the United States.
Hydraulic Performance of Davey's HM160 Horizontal Multistage Pump With Torrium2
| Single Phase Models | HM160 |
Motor: P1 kW P2 kW | HM160-19T – P1 kW: 2.3 HM160-19T – P2 kW: 1.8 |
Amps: Run Start | HM160-19T – Run: 9.7 HM160-19T – Start: 40 |
Ports (BSP): Suction Discharge | All – Suction: 1.5 F All Discharge – 1 M |
| Nominal operating pressure (kPa) | HM160-19T: 400 |
| Maximum pump pressure (kPa) | HM160-19T: 600 |
| Tank air pre-charge (kPa) | HM160-19T: 420 |
| Nominal flow (L / min) | All in 160 L / min (42 US gallons) |
Hydraulic Loss of HM Pump With Torrium2
Electrical Data
| Pump | |
| Speed | 2900 rpm |
Supply voltage
| 230±10% 415±10% |
| Supply frequency | 50 Hz |
Enclosure class
| IP55 IP56 |
| Insulation class | Class F |
| Torrium2 | |
| Voltage | 220V-240V ± 10% |
| Phase | Single |
| Hz | 50 / 60 |
| IP rating | IP56 |
| Maximum load current | 10A |
| Maximum motor size @ 240V input | 1.8 kW |
| Surge protection | Varistor |
*RPM (Revolutions Per Minute): The RPM value indicates the rotational speed of the pump motor or shaft, representing the number of complete rotations made within one minute.
*Hz (Hertz): The hertz (Hz) is the standard unit used to measure electrical frequency, indicating the number of cycles per second supplied to the motor.
*A (Ampere): The ampere (A) is the standard unit of electrical current, measuring the flow of electric charge through an electrical circuit. It is commonly referred to as an amp.
kW (Kilowatt): The kilowatt (kW) is the standard unit used to measure electrical power consumption or motor output capacity, with one kilowatt equivalent to 1,000 watts.
Materials of Construction
| Materials of construction | |
| Part | Material |
| Casing | 304 stainless steel |
| Impellers | 304 stainless steel |
| Stages (casing) | 304 stainless steel |
| Pump shaft | 316L stainless steel |
| Stage centring device | 304 stainless steel |
Mechanical seal:
| Carbon Ceramic 316 stainless steel EPDM |
| O-ring | EPDM |
| Plug | 316L stainless steel |
| Motor shell & lantern bracket | Aluminium with baked polyester powder coat finish |
| Motor feet | Xenoy |
| Fan cowl / rear foot (models up to 1.05kW) | Polypropylene |
Horizontal Multistage Pump's Q-H Curve For HM160 & HM270
Included In The Box
Horizontal Multistage Water Pump – HM160-19T
Torrium2
User Manual
Proof of Purchase
24 Months of Manufacturer Warranty (Increased by Another 6 Months with e-Warranty Scheme)
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