Davey's Horizontal Multistage Water Pump - HM90-08T
Key features:
- Standard automatic pressure system type.
- Suitable for smaller households (5 shower heads with 8 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:
Overview of Davey's Horizontal Multistage Water Pump - HM90-08T
The HM90-08T Horizontal Multistage Water Pump by Davey is designed for residential and light agricultural applications where higher water flow delivery is needed with stable high-pressure performance. The HM90-08T utilises a multistage centrifugal pumping system. The pump’s multiple stainless-steel impellers are internally arranged to provide maximum hydraulic efficiency and constant water pressure for larger household and irrigation systems.
Part of the Davey Water Products HM Series, the HM90-08T is made from stainless steel hydraulic components to enhance durability, corrosion resistance and long-term reliability in continuous operating conditions. With a compact horizontal design, the pump is easy to install and delivers reliable water transfer performance for medium to larger domestic applications.
The HM90-08T is designed with Davey’s Torrium2 controller system, which provides automatic constant pressure operation, with water flow management for efficiency and quieter running characteristics. The HM90-08T is commonly employed for domestic pressure boosting, irrigation systems, transfer of rainwater and domestic water supply applications, offering a practical blend of improved flow performance, energy efficiency and reliable delivery of water pressure.
Identification of Davey HM90-08T Horizontal Multistage Water Pump
All product coding for Davey Water Products is based on a globally standardised identification structure, common across the range of water pump products. The coding system enables easy technical referencing, inventory management, specification identification and warehouse organisation processes for both authorised dealers and internal distribution channels.
The identification structure of HM Series Horizontal Multistage water pumps is generally as follows:
1) Abbreviation for product series
2) Flow rate (nominal)
3) Performance Stage or Pump Arrangement
4) Operating system or controller identifier
For example, the code for the HM90-08T starts with “HM” for the Horizontal Multistage pump series. The “90” refers to the pump’s nominal flow rate of 90 litres per minute (lpm) and therefore indicates a higher water delivery capacity compared
to the HM60 variants. The ‘08’ refers to the specific performance and pressure configuration within the HM90 range and the suffix ‘T’ refers to the unit being supplied with Davey’s Torrium2 automatic controller system.
This product identification method offers Davey’s technical teams, warehouse operators and authorised distributors an internal method for accurate stock organisation, technical servicing, spare parts referencing and order verification. This will also help the installer and customer identify the HM Series models based on the flow rate capability, operating pressure and controller configuration.
Attachment
Pressure Controller
It can be installed as an integral part in Davey’s HM centrifugal pump. It is an electrical device which serves as a smart controller to keep constant water pressure and a steady water flow in homes and business buildings. You can do this by starting the pump at a pressure drop and stopping it at low flows around 1 LPM.
Another advantage of buying the Torrium2 is that it makes it easier to switch on and off the Horizontal Multiple-Stage electropump. This soft start-stop is designed to switch on only when the speed is increased or decreased very slowly, so as to avoid the possibly disastrous effects of water hammer.
The sensor is an important component. It detects a high demand for water and only triggers when the pressure drops down to 80% of the peak output, a strong starting pressure. This peak is automatically set when the booster pump stops and has a flexible use, depending on the performance of any pump.
The Torrium2 has an adaptive start, so it can distinguish between customers who really need water and customers who are just wasting it (for example, when water is dripping from the tap). If the flow stops dangerously low, the smart controller will automatically set itself to half its last pressure setting to cut off any more revolutions. If the hydration flow rate was above 0.5 LPM, the Torrium2 would revert to its normal start mode to engage the Horizontal Multistage pump.
Dry Running Protection: Water pumps are intended to be run at full capacity, all the liquid passes through them. So, whenever the Torrium2 senses a loss of prime in the Davey’s horizontal multistage centrifugal pump, a fail-safe mechanism is activated to completely shut down the pump from further operation. The timer runs out, and Torrium2 tries again in 5, 30, or even 1, 2, 4, 8, 16, or 32 hours. On the other hand, it would also reboot itself so the Horizontal Multistage pump could start working when the water pressure inside was just right.For the representative models of Davey’s Horizontal Multistage water pump, which includes the Torrium 2, an additional letter, T’, is added at the end of the formal product code, immediately following the numerical number of the Kilowatt / power2 sequencing. A great example is the replacement HM160-14T.
Mechanical Pressure Switch
Another safety feature is the mechanical pressure switch that can be fitted to Davey’s Horizontal Multistage pumps. This switch allows the pump to run at the pressure level set by the user.
Davey’s Horizontal Multistage electropump is switched on or off when the water level is above or below the ideal pressure.
Adjustable: Customers can adjust the cut-in and out points to suit their water system needs. The dampening is balanced rather than Davey’s Horizontal Multistage Water Pump. This also prevents damage to pipelines caused by unnecessary pressure surges or drops.
Energy and natural resources saving: By adjusting the pressure switch on the horizontal multistage water pump, we can extract the maximum quantity of water from our raw water supply from Air Selangor or similar ration-sourcing institution. This is because the high-water flow rate is only needed when it is absolutely necessary and this extends the life of the electropump and reduces wear and tear on it.
Pressure Tank
As a last option the pressure tank can be attached to Davey’s Horizontal Multistage water pump. It is absolutely necessary to the continued use of all types of booster pump because it can contain water to reduce the arrangement observed in the activation and deactivation.
This layer is made from a simulated diaphragm, and helps separate air and water inside the pressure tank. This is very important because cavitation can happen when liquid and oxygen interact and cavitation causes impending devastation that can be fatal to the surrounds.
Inside, the stored water can be used to push against the diaphragm, compressing the air above. Horizontal Multistage water pumps are automatically stopped at a certain level of the reservoir. That means you can only force the water out if the airflow is restricted. Like in a running pipe, shower head or toilet system. Davey’s Horizontal Multistage centrifugal pump resets to start refilling again, changing slowly from cut-out pressure to cut-in pressure until it reaches its lowest point.
Certification
With the right accreditations in hand, Davey is ready to open shop in new markets around the world including Southeast Asia where Malaysia is based. Therefore, the Horizontal Multistage centrifugal pump has passed all the tests and has all the certifications required. These certifications are limited to use in home appliances, to verifying that the water pump is safe to drink for rationing, and/or to closely monitoring and testing the pump throughout the production line to ensure constant quality.
Davey’s HM water pump has undergone stringent testing by Société Générale de Surveillance and is a suitable choice for residential applications and safe electrical yardage. Counterexamples to the concept of electrical protection include inadvertent shock, possible shorting of the centrifugal pump, possible ignition of a fire, and the correct enclosure and enclosing of the horizontal multi-stage.
Davey complies with European Standards for the Horizontal Multistage Pump to ensure safety, superior grading, interoperability, more environmentally conscious approach and trade access to the Western soil. European Standards is the authoritative regulatory body for harmonising technical standards across Europe. This water pump is another example of how society has benefited from the development of new technologies.
Davey has made sure all its mechanical engineering products meet the standards of the International Electrotechnical Commission (IEC), the world’s leading authority for voltage and electronic-based technology, which has been in existence since 1906. This is done in an effort to facilitate mutual recognition agreements (MRAs) and to increase trade access.
The greatest advantage of winning the confidence of Davey’s backyard is that the Horizontal Multistage pump and its diesel motor version have been approved for electric-powered safety under Australian standards, which are self-governing, non-profit regulations.
Like all other components used in water systems, this Horizontal Multistage pump must not pose any health risk when exposed to potable water as per AS4020:2005 the gold standard of the Australian Standard. This certified byproduct is significant for manufacturers and suppliers like Davey to make sure the liquids running through their water pumps are safe to drink in the first place. It is based on different points of reference and testing methods applied to the pipes, attachments, coating and any related materials.
Another consumer safety certification Davey has received is in Oceania, the New Zealander’s Standards for its credentials for exporting reasonableness.
ISO 9001: An international quality management standard that separates mid-range pump manufacturers from the upper echelon of the industry. As part of the ongoing quest for improvement, the officials reviewing our processes found Davey’s Horizontal Multistage electropump and they found that our products were consistent across batches and distribution points in the supply chain.
ISO 14001: The eco-friendly approach followed in the manufacturing of Horizontal Multistage Pumps for a sustainable future. ISO 14001 enables Davey Malaysia to deliver goods faster and more efficiently such as closing unnecessary lightings during certain inactivity periods, replacing older bulbs with light-emitting diodes during pump formation, and more through the proper route dividing and the ushering commitment of recycling exercises.
All these certifications have increased Davey’s confidence and reputation, much to the satisfaction of customers who have repeatedly used the Horizontal Multistage electropump.
Full-Powered, Consistent Speed Motor Pump
Davey’s horizontal multistage pump will give you a consistent, full-power water pressure rate for as long as you use it. This is the most basic form of centrifugal pumps irrespective of the current utility period.
The Horizontal Multistage electropump is very easy to install. Simply place just below the water tank and connect to the power supply. It will start pumping water. If you are a home or business owner and want to install a direct water pump, then you don’t have to do anything else.
And here we see the rear end of a Davey Horizontal Multistage pump protected from external abrasion and corrosion by the trademark yellow coating. Inside the enclosure is the vital motor that turns the pump’s shaft to bring pressure into the house. This is a display unit from Davey Malaysia, HM series, to be used for elaborate exhibition purposes.
Davey’s Horizontal Multistage pump has an hourly cycle that outperforms many of our competitors’ centrifugal pump models, allowing it to reach a steady and durable number of starts without mechanical failure, a key value that attracts many customers to our fable. However, only a few special types of Hotizontal Multistage pumps can start more than 200 times per hour.
Reliability and Provenness: The long service life of horizontal multistage pumps is a proof of the sound mechanical engineering concepts that have led to their development. Thus, there is a lot of research and development, culture behind it and a wide range of spare parts easily available for this centrifugal pump – if it ever has to be fixed.
Efficiency: The electrotechnology of the engine is well developed and does not require additional tuning, equipped with enough parts and an electrical motor pump which has a single direct-to-access force of flow needed for effective showering, irrigation or cleaning. With the strong supply chain in Davey Malaysia, the Horizontal Multistage water pump can be assembled easily in bulk, leading to a cost-savvy product that is now used around the world.
Fitting HM90-08T For The Household
Davey Water Products HM90-08T is a great choice for homes and water systems that need more water flow capacity to meet increased daily demand. The HM90-08T from Davey’s Horizontal Multistage (HM) Series is often suggested for larger double storey residences, homes with more than one bathroom or domestic systems which have several water outlets operating simultaneously.
When choosing a suitable home pressure system, engineers and installers generally take into account a number of parameters including pipe length, output quantity, building height, the consistency of water pressure required, simultaneous water use, and amount of water use. The HM90-08T is a water distribution system with a nominal flow rate of 90 litres per minute. This is the perfect system for homes that require a more powerful and stable system.
Common applications of the HM90-08T include:
- Pressure boosting system for large homes.
- Household uses with multiple bathrooms.
- Systems for watering gardens and irrigation.
- Rainwater harvesting facilities.
- Water transfer for general household use.
The HM90-08T features stainless steel hydraulic components and is combined with Davey’s Torrium2 controller system to make water distribution around the property easier and provide automated constant pressure operation. The multistage impeller configuration allows for efficient hydraulic performance, noiseless operation, and reduced energy consumption.
The HM90-08T is built for today’s home water supply applications, providing a durable, efficient solution to consumers who need a higher water flow capacity with reliable, everyday pressure performance.
Inlet Sizing
The pressure of the system can be increased by allowing preferably suitable fluids to enter and be fed into the system by way of the suction input of any water pump. In details the situation changes with the use of other types of centrifugal pumps.
To take an example, think of a sump pump. The water system can suck sewage into the engine and extract trapped debris with a grinder and filter-strainer inside the inlet. This helps in both flood relief and in waste management, which is important both for cleanliness and ethics. The Davey Horizontal Multistage pump has been designed to be used in a home pressure system. Its primary function is to draw potable water only.
Unidirectional Flow: The electric motor creates a pressure differential which sucks in the water and directs the fluid unidirectionally into the impeller section of the horizontal multistage water pump by a dynamic structure that maintains the flow rate.
The size of the electropump’s inlet varies by model. As the water becomes easier to overflow, it will ensure the output of the pump matches the plumbing system of the housing. If the diameter of the pipe is much smaller (or larger) than the inlet of the Horizontal Multistage pump, a connector can be used to bridge and correct the dimensional gap.
The inlet port suction for all Davey HM models is summarised in the following table:
| 230V ± 10% Single Phase Models | ||
| Product Code | Ports | |
| Suction BSP | Discharge BSP | |
| HM90-08T | 1¼” F | 1″ M |
If there are no air pockets in the water system and a Davey’s Horizontal Multistage water pump is receiving full water suction, net positive suction head (NPSH) will occur automatically.
Less Friction: The larger input diameters of this centrifugal pump allow more water to enter with less effort, and therefore the pump can flow at a higher rate. Once again there is a further case where self-priming accelerates sharply.
Volute
Actually, under the cylindrical shell which encloses a plurality of stages (diffusers and impellers), the volute is spiral-shaped and made of a mix of polished and resistant composite metals. For the Horizontal Multistage water pump, this was implemented for four reasons:
The water is flowing all the time through the impeller stages and helps the surging strength of the discharge fluids as they exit. The volute of the electropumps was designed with the purpose of reducing the turbulence to optimise the flow rate.
The thick volute casing prevents outside contaminants like litter from entering the system and contaminating the pure water supplied by the Horizontal Multistage pump.
Heavy-duty 304 stainless steel volute housing. It has the internal components which are divided into chambers of staging bodies like the impeller, mechanical seal, diffuser etc. The picture is taken in the showroom i.e. at the Davey Horizontal Multistage pump.
Changing Energy States: From the suction force of the motor moving into the interior area where the impellers are located, the water is gradually pushed from the center and centrifugally pushed against the outer alloy walls, and discharged onto the outlet of the Horizontal Multistage pump. The energy change in this sequence occurs at various points from kinetic to pressure. This is due to the reduction of speed and increase of water pressure through filling the volute chamber. This event follows the rule established by Bernoulli’s principle, a rule based on scientific observation and legislation.
A self-priming affirmation: the Horizon Multistage water pump will finally lose any air gap that allows it to self-prime once the volute body is internally moistened and hydrated. Otherwise, there’s a risk of damaging cavitation. Cavitation is when trapped air rushes into the impeller with water as it spins.
Impeller & Diffuser
In the volute chambers there is compartmentalisation of impellers and diffusers, orderly disposed in the form of staging bodies from one to another. Also known as the protection bracket, these staging bodies plays a significant role of pivoting these mechanisms in place, ensuring that it doesn’t become loose within Horizontal Multistage water pump as operation and revolutions begin.
With each staging body room, the pressure required for optimal use of running faucets, showering, or across other daily essentials would increase as water passes from the first phase to another.
Closed Impeller Design
Closed impellers are attached to the shaft to reduce the thrust load and are used to improve fluid handling while driving the rotor.
Electropumps are also renowned for their excellent hydraulic performance, which is further enhanced by the double wall (front and rear) and the vane design that guides the liquids inside to a steady and reliable discharge using centrifugal force.
Cavitation-Equipment Prevention: The impellor’s protective barriers make the horizontal multistage water pump far less likely to create and collapse air bubbles in the water, which in turn reduces the likelihood of future damage to the pump.
Horizontal multistage centrifugal pumps last longer. They lessen the thrust load, reducing wear on the bearing, frequency of use, and cost of shafting.
The impeller and diffuser of the horizontal multistage water pump are made of stainless steel to prevent corrosion by the large volumes of fluid. The material also helps the pump to withstand the many cycles typical of such pumps.
Surface Smoothness: The impeller is hand polished to the smoothest possible state before insertion into the electropump. This process reduces the surface tension even further, creating as little friction and turbulence as possible. This modification to Davey’s Horizontal Multistage pump increases fluid flow efficiency and eliminates unnecessary power consumption (kilowatts).
Reliable Performance at Every Flow Temperature The multistage pump’s impeller is made from high-quality stainless steel, so it can easily process hot or cold water. Its mechanical properties hardly expand or contract.
Generator Protection With Backplate And Mechanical Seal
The single most critical factor in whether Davey’s Horizontal Multistage pump will keep going is the intersection between electrical engineering and its mechanical field application. It also has a backplate and a mechanical seal element, to ensure that no splash water can reach the core motor (the electrotechnology elements of the engine cannot get wet, or they will short circuit). The remaining space can be sealed with a gasket or washer.
At the same time, the water will be distributed in a spiral manner towards the discharge outlet, obtaining the desired water supply as required by means of the centrifugal pump. The backplate and mechanical seal are also installed to hold the shaft steady, so that Davey’s Horizontal Multistage pump will not topple over or otherwise become unbalanced once operation commences.
A circlip is used within the mechanical seal of the Horizontal Multistage water pump to transfer spinning stress to the seal and keep it contained at all times. This circlip is before the backplate. This circlip is referred to as a clip spring in the Davey Water Products official handbook, but is not to be found at all on the HM80 and HM150 series.
Airtight Closing O-Ring And Vibration-Absorbent Spacer
The Horizontal Multistage electropump is designed with an O-ring for each of the core pieces, where such is applicable, which connects to another inner part. This ensures a snug fit and prevents any additional latent leakage from appearing. The hydrocarbon is suitable for Davey’s Horizontal Multistage water pump due to its compatibility with the high temperature resistance of the pump. The hydrocarbon is moulded with EPDM (ethylene propylene diene monomer) rubber, which is superior to neoprene in terms of increased warmth. Many of these O-rings are typically located inside the volute housing.
The spacers are installed to maintain proper spacing and prevent friction between the revolving parts of this horizontal multistage water pump. This arrangement is essential to maintain the mechanical bearings in place and to prevent any parts being overly pressed when the HM electropump begins to work.
Spacers in Horizontal Multistage Centrifugal Pump are pseudo-vibration absorbers that reduce unnecessary stress on the machine and reduce stiffness.
A technician installing an O-ring on the joint compartments of a Davey pump. Close-up. It’s made of ethylene propylene diene monomer. The different resilience of the rubber was chosen for use in water pumps that work in larger temperature ranges.
And also, the inner parts of this water pump are all made of stainless steel 304 (or SUS304) of strong quality such as impellers, mechanical seal, spacers, circlip and volute casing for the parts to be consistent in toughness. It is made of strong SUS316 and is the only shaft connected to the motor. This is to transmit spinning power effectively.
Operating Limits of HM90-08T Pump With Torrium2
| Operating Limits | |
| Maximum continuous flow rate | 200 lpm |
| Maximum operating pressure | 700 kPa* |
| Maximum current | 10 amp |
| Cut-in pressure range | 80% of pump shut-off head |
| Maximum water temperature | 65°C / 149°F |
*Dependent on optional tank pressure rating, operating pressure to to 820 kPa may be achieved.
*The ‘L’ symbol is synonymous with litre.
*kPa is a derived unit of pressure.
*Psi is also defined as pounds per square inch.
*Amp is the shortened naming of Ampere, otherwise known as ‘A’ also.
*Degree celsius is marked as °C, whereas °F is the United States variant of Degrees Fehrenheit.
Hydraulic Performance of Davey's HM90-08T Horizontal Multistage Pump with Torrium2
| Single Phase Model | HM60-08T |
Motor: P1 kW | 1.1 0.78 |
| Amps: Run Start | 4.9 20 |
| Ports (BSP): Suction Discharge | 1¼” F 1″ M |
| Nominal operating pressure (kPa) | 310 |
| Maximum pump pressure (kPa) | 460 |
| Tank air pre-charge (kPa) | 320 |
| Nominal flow (L / min) | 90 |
*The measuring symbol ‘kW’ is known as kilowatt.
*BSP on the ports row represents British Standard Pipe.
*The suction port in F and M represents Female and Male respectively.
Horizontal Multistage Pump's Electrical Data
| Pump | |
| Speed | 2900 rpm |
Supply voltage
| 230±10% 415±10% |
| Supply frequency | 50 Hz |
Enclosure class
| IP55 |
| 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 is the abbreviation of revolution per minute.
*Hz is also known as Hertz.
*Current in ‘A’ represents ampere.
*kW is the short-form of kilowatt.
Materials of Construction For The Horizontal Multistage Centrifugal Pump - HM90-08T
| 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 |
| 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 |
Hydraulic Loss of HM90-08T Pump with Torrium2
Q-H Curve of HM90-08T Pump with Torrium2
Included In The Box
Horizontal Multistage Water Pump – HM90-08T
User Manual
Proof of Purchase
24 Months of Manufacturer Warranty (Increased by Another 6 Months with e-Warranty Scheme)
Downloads
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