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High Pressure Pumps Axial Piston Pumps

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    In the past 5 years, we made our HPR/HPH series axial piston pumps as OEM products for a well-known brand. These pumps have been successful in many industries because they are so advanced and work so well. Over the years, we have participated in many projects, and win the trust from system companies.

    axial piston high pressure pump
    axial piston high pressure pump

    Now that our confidentiality agreement has expired and we are no longer limited to exclusive sales to brand owners, we can now offer these high-performance pumps to the public.

    The HPR/HPH series axial piston pumps can serve as an alternative to Danfoss PAH pumps. These pumps offer similar performance characteristics and are suitable for high-pressure applications such as reverse osmosis, ultra-pure water systems, and industrial water treatment, which are also key markets for Danfoss PAH pumps.

    high pressure pump with electric motor
    high pressure pump with electric motor

    Here’s how the HPR/HPH series compares as a viable alternative:

    Key Features and Advantages as a Danfoss PAH Alternative

    1. High Pressure Handling

    Both HPR/HPH pumps and Danfoss PAH pumps are designed to handle high-pressure environments. They typically operate in ranges up to 160 bar or more.
    Like Danfoss PAH pumps, the HPR/HPH series is designed for applications such as reverse osmosis systems. This makes them perfect for industrial water treatment.

    2. Corrosion Resistance

    Just like Danfoss PAH pumps, the HPR/HPH series uses high-quality materials like ASTM 316L and ASF2205, which are very corrosion resistant. This means they last a long time, even when you’re handling seawater or other aggressive fluids, just like Danfoss pumps.

    3. Ultra-Pure Water Applications

    The HPR/HPH pumps are designed so there is no lubricating oil contamination, just like Danfoss PAH pumps. This makes them perfect for ultra-pure water systems because you don’t have to worry about cross-contamination.

    4. Low Pulsation and High Efficiency

    The HPR/HPH pumps have a multi-piston design that minimizes pulsation, so you get a nice, steady flow rate and high efficiency, just like Danfoss PAH pumps, which are known for their smooth operation and efficiency.

    5. Compact and Durable Design

    Both pump series are known for their compactness and durability, allowing for easy integration into various industrial setups where space might be limited but high performance is required.

    6. Customizable for Different Fluids

    Both HPR/HPH and Danfoss PAH pumps can be customized for different water qualities (tap water, seawater, etc.), with seals and materials adjusted for various fluid types. This flexibility makes the HPR/HPH a strong alternative for Danfoss PAH in diverse applications like firefighting, dust suppression, and oil and gas operations.

    Performance Specifications Comparison (General)

    FeatureHPR/HPH SeriesDanfoss PAH Series
    Max Pressure (Bar)160160+
    Flow Rate (L/min at 1500 rpm)11 – 142.5Similar (varies by model)
    Operating Temperature (°C)2°C to 50°C2°C to 50°C
    Corrosion ResistanceASTM 316L / ASF2205316L stainless steel
    PulsationMinimizedLow Pulsation
    ApplicationsReverse osmosis, ultra-pure water, seawaterReverse osmosis, seawater

    Working Principle of Axial Piston Pumps

    Axial piston pumps are positive displacement pumps that work by using multiple pistons that move back and forth inside a cylinder block to suck in and push out fluid. These pistons are arranged parallel to the central axis of the pump. When the shaft turns, the swashplate tilts, which pushes the pistons in a linear motion, creating a pressure difference inside the pump chambers.

    ro high pressure pumps
    ro high pressure pumps

    Axial Piston Pumps High Pressure Pump PR/HPH Series

    • HPR/H 08 ~ 12.5
    • HPR/H 20 ~ 40
    • HPR/H 50 ~ 100

    Application

    HPR/HPH pumps can be used in the following applications

    • Zero wastewater discharge
    • High-pressure atomization humidification system
    • Fire extinguishing system
    • High-pressure flushing and cleaning process
    • Fixed and mobile water hydraulic system

    Advanced Technology

    The HPR/HPH series pumps are completely oil-free clean systems, using water as the sole coolant and lubricant, eliminating the potential risk of cross-contamination between oil and water. Originating from advanced British pump technology, the HPR/HPH high-pressure water pumps deliver superior performance.

    1. Ultra-clean technology with no lubricating oil, preventing cross-contamination
    2. Compact design for easy assembly, disassembly, and maintenance
    3. Excellent corrosion resistance
    4. Multi-plunger design minimizes pulsation
    5. Widely used in various ultrapure water treatment applications
    6. Longer service life resulting in ultra-low operating costs
    7. Outstanding stability
    axial piston high pressure pumps factory supplier
    axial piston high pressure pumps factory supplier

    Axial Piston Pumps Working Conditons – HPR/HPH Series

    a. Operating Ambient Temperature Range: -30 to +60°C

    If the ambient temperature exceeds this range or the motor installation is above 1000 meters in altitude, the motor’s output power may decrease. This is mainly due to reduced air density and poor motor cooling. In such cases, a larger motor model may be required to achieve higher rated output power.

    b. Medium Temperature Range: 0 to +50°C

    Excessive medium temperatures can cause permanent damage to the pump. If long-term operation at other temperatures is needed, please contact a THINKTANK’s sales representative for appropriate solutions.

    c. HPR/HPH Series Pumps are Equipped with a Discharge Check Valve and Pressure Relief Valve

    If the ambient temperature exceeds this range or the motor installation is above 1000 meters in altitude, the motor’s output power may decrease. This is mainly due to reduced air density and poor motor cooling. In such cases, a larger motor model may be required to achieve higher rated output power.

    duplex steel high pressure pump
    duplex steel high pressure pump

    Performance Requirements

    Temperature

    The HPR/HPH system pumps perform best within a temperature range of 2°C to 50°C. For temperatures below freezing, environmentally friendly antifreeze must be used. It is also possible to operate at temperatures above 50°C; however, the volumetric efficiency of the pump will be affected, and the maximum operating temperature must be specified when ordering.

    Filter

    All water entering the pump must be pre-filtered to a nominal rating of 10μm (absolute value of 25μm). In closed-loop systems, return flow filtration is acceptable. High-pressure filtration can also be used, but it is considered a more expensive option.

    high pressure pump performance requirement
    high pressure pump performance requirement

    Fluid

    The standard pump operates well with potable water and industrial water, such as distilled water, reverse osmosis water, or demineralized water. Depending on the operating environment, changes to the sealing material or structure may be required. The standard structure is suitable for seawater, but due to the increased corrosion potential, higher-quality materials may be needed for long-term operation.

    Air Venting

    After installation, before the initial start-up, loosen the air vent bolts located at the highest points on both sides of the mounting flange and vent the air completely from the pump before retightening the bolts. If the pump is fully submerged in a tank, these two vent bolts can be completely removed.

    High Pressure Pump Motor Selection

    The required motor power can be calculated using the following formula:

    image
    • P: Power (kW)
    • M: Torque (Nm)
    • η: Mechanical efficiency
    • p: Pressure (barg)
    • n: Rotational speed (rpm)
    • V: Geometric displacement (cc/rev.)

    Under ideal conditions, the required torque can be calculated using the following formula:

    image

    Specification

    Pumps Model81011.512.52025324050657181100
    Displacement (cc/rev)81011.512.52025324050657181100
    Housing MaterialASTM 304 / ASTM 316L / ASF2205ASTM 304 / ASTM 316L / ASF2205ASTM 304 / ASTM 316L
    Min. Outlet Pressure(barg)30
    Max. Outlet Pressure(barg)160
    Inlet pressure,Continuous(barg)0.1-5
    Min. speed,Continuousrpm)700
    Max. speed (rpm)3000300030003000360036003600300020001800180018001500
    Flow Rate (L/min) (16Mpa, 700 rpm)56.37.27.912.615.820.225.232.642.346.252.765.1
    Flow Rate (L/min) (16Mpa, 1000 rpm)7.29.110.411.418.222.829.136.446.560.566.075.393.0
    Flow Rate (L/min) (16Mpa, 1500 rpm)11.013.815.817.327.634.544.255.271.392.6101.2115.4142.5
    Flow Rate (L/min) (16Mpa, 2000 rpm)14.818.621.423.338.246.559.574.495.0
    Flow Rate (L/min) (16Mpa, 3000 rpm)22.828.532.835.657.071.391.2114
    Power Consumption (KW) (16Mpa,
    1500 rpm)
    3.44.24.95.38.510.613.61721.928.531.135.543.8
    Min. Media temperature  (°C)2
    Max. Media temperature (°C) 50
    Sound Pressure Level (dB) *76767676787878798080808080
    Weight  (kg)8.68.68.68.614.7214.7214.7214.7224.824.824.824.824.8
    Integrated Flush ValveYESYESNO
    * Sound Pressure Level: Calculated according to EN ISO 3744: 2010 / dB(A) [LPA, 1m], when driven by a motor and operating at maximum working pressure and speed.

    Installation Dimensions (HPR 8~12.5): Option 1

    HPR 8~12.5 axial piston high pressure pumps
    HPR 8~12.5 axial piston high pressure pumps
    Parallel key5*5*20(DIN6885)
    BleedM5*12
    Inlet PortG 3/4” T Port
    Outlet PortG 3/4” P Port
    * Most Popular Size For Tap Water Application

    Installation Dimensions (HPR 8~12.5): Option 2

    HPR 8~12.5 axial piston high pressure pump
    HPR 8~12.5 axial piston high pressure pump
    Parallel key5*5*20(DIN6885)
    BleedM5*12
    Inlet PortG 3/4” T Port
    Outlet PortG 3/4” P Port
    * Most Popular Size For Seawater Application

    HPR/H 8~12.5 Performance Data

    HPR/H 8~12.5 Performance Data
    HPR/H 8~12.5 Performance Data2

    Installation Dimensions (HPR 20~40)

    HPR 20~40 high pressure pump
    HPR/H 20~40 axial piston high pressure pump
    HPR/H 20~40 axial piston high pressure pumps

    Installation Dimensions (HPR 50~100)

    HPR 50~100 high pressure pump
    HPR 50~100 high pressure pump
    HPR 50~100 high pressure pump
    HPR 50~100 high pressure pump performance data

    Special Model – HPHS 0.6~1.0

    Pumps Model0.60.81.0
    Code number TT010200201TT010200202TT010200203
    Displacement (cc/rev)4.075.086.3
    Housing Material220522052205
    Min. Outlet Pressure(barg)202020
    Max. Outlet Pressure(barg)858585
    Inlet pressure Continuous (barg)0.5-50.5-50.5-5
    Min. speed,Continuous(rpm)700700700
    Max. speed * (rpm)350035003500
    Flow Rate (m3/H) (85barg,700 rpm)0.120.170.22
    (m3/H) (85barg,1000 rpm)0.220.290.36
    (m3/H) (85barg,1200 rpm)0.250.330.42
    Flow Rate (m3/H) (85barg,1500 rpm)0.340.430.54
    Flow Rate (m3/H) (85barg,1800 rpm)0.400.520.65
    Flow Rate (m3/H) (85barg,2500 rpm)0.580.750.94
    Flow Rate (m3/H) (85barg,3000 rpm)0.710.911.14
    Flow Rate (m3/H) (85barg,3500 rpm)0.831.061.32
    Calculation factor(at maximum speed)496509512
    Motor selection (KW)(Maximum pressure, maximum speed)2.23.04.0
    Media temperature (°C)2~502~502~50
    Sound Pressure Level (dB) **747474
    Weight  (kg)3.63.63.6
    Integrated Flush ValveYESYESYES
    * At maximum speed, the inlet pressure must be at least 2 barg;
    ** Sound Pressure Level: Calculated according to EN ISO 3744: 2010 / dB(A) [LPA, 1m], when driven by a motor and operating at maximum working pressure and speed.
    water mist firefighting pump
    water mist firefighting pump

    Special Model – HPHS 1.5~3.5

    Pumps Model1.51.82.22.53.03.5
    Code number TT010200204TT010200205TT010200206TT010200207TT010200208TT010200209
    Displacement (cc/rev)9.3410.2112.7515.417.8521.56
    Housing Material220522052205220522052205
    Min. Outlet Pressure(barg)202020202020
    Max. Outlet Pressure(barg)858585858585
    Inlet pressure Continuous (barg)0.5-50.5-50.5-50.5-50.5-50.5-5
    Min. speed,Continuous(rpm)700700700700700700
    Max. speed * (rpm)350035003500300035003000
    Flow Rate (m3/H) (85barg,700 rpm)0.30.340.450.570.640.76
    (m3/H) (85barg,1000 rpm)0.540.580.750.901.031.24
    (m3/H) (85barg,1200 rpm)0.580.640.841.031.181.39
    Flow Rate (m3/H) (85barg,1500 rpm)0.800.871.101.341.551.88
    Flow Rate (m3/H) (85barg,1800 rpm)0.921.01.271.581.802.11
    Flow Rate (m3/H) (85barg,2500 rpm)1.311.421.802.222.552.98
    Flow Rate (m3/H) (85barg,3000 rpm)1.601.732.182.683.073.58
    Flow Rate (m3/H) (85barg,3500 rpm)1.841.992.52 3.56 
    Calculation factor(at maximum speed)519524532535532530
    Motor selection (KW)(Maximum pressure, maximum speed)5.55.57.57.51111
    Media temperature (°C)2~502~502~502~502~502~50
    Sound Pressure Level (dB) **787878787878
    Weight  (kg)8.58.58.58.58.58.5
    Integrated Flush ValveYESYESYESYESYESYES
    * At maximum speed, the inlet pressure must be at least 2 barg;
    ** Sound Pressure Level: Calculated according to EN ISO 3744: 2010 / dB(A) [LPA, 1m], when driven by a motor and operating at maximum working pressure and speed.
    ro high pressure pump
    ro high pressure pump
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    Picture of Will Don

    Will Don

    After earning my bachelor's degree in mechanical engineering from Zhejiang Normal University in 2008, l was fortunate enough to begin my career with Siemens, Fisher, and YTC, focusing on control valve accessories. Over the past dozen years, l've poured my heart and energy into understanding technology and fluid solutions for control valves.
    Now, as the marketing director for THINKTANK, a trusted branch of the Taiwan STONE valve group, I can't help butf eel proud of how far we've come. Our knowledge isn't just reaching professionals like engineer and valve distributors; it's also inspiring the next generation of automation college students.
    l genuinely hope you're enjoying our articles and finding them helpful.Your thoughts, questions, and feedback mean the world to me, so please don't hesitate to reach out to marketing[at]cncontrolvalve.com. Whether you're a seasoned expert or just curious about the field, I'm here to connect, share, and learn together.

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    I am the author of this article, and also the CEO and marketing director of THINKTANK, with 15 years of experience in the industrial valve industry. If you have any questions, you can contact me at any time.

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