• DHP 4.0 Axial Piston Pump - 4.0m³/h High-Pressure Water Treatment Consumables for Medium-Flow Desalination
  • DHP 4.0 Axial Piston Pump - 4.0m³/h High-Pressure Water Treatment Consumables for Medium-Flow Desalination
  • DHP 4.0 Axial Piston Pump - 4.0m³/h High-Pressure Water Treatment Consumables for Medium-Flow Desalination
DHP 4.0 Axial Piston Pump - 4.0m³/h High-Pressure Water Treatment Consumables for Medium-Flow Desalination

DHP 4.0 Axial Piston Pump - 4.0m³/h High-Pressure Water Treatment Consumables for Medium-Flow Desalination

Product Details:

Place of Origin: China
Brand Name: Fenigal
Certification: CE
Model Number: DHP 4.5

Payment & Shipping Terms:

Minimum Order Quantity: 1 pc
Price: Negotiable
Packaging Details: standard export packing
Supply Ability: 60000 Units per Month
Get Best Price Contact Now

Detail Information
Product Model: DHP 4.0 Geometric Displacement: 32 Cm³/rev
Rated Flow At Rated Speed (1800 Rpm): 4.0 M³/h (equivalent To 73.3 L/min In Minute Flow Rate) Minimum Outlet Pressure: 20 Bar
Maximum Continuous Outlet Pressure: 80 Bar (For Higher Or Lower Pressure Requirements, Please Contact FENIGAL Sales Representative)
Highlight:

DHP 4.0 axial piston pump

,

high-pressure water treatment consumables

,

medium-flow desalination pump

Product Description

The DHP 4.0 axial piston pump, a compact and efficient water treatment consumable from WUXI FENIGAL, is tailored for medium-flow industrial reverse osmosis scenarios—ideal for small/medium seawater desalination and industrial wastewater desalination systems. As a core model in the DHP3.5-4.0 series, it stands out with medium-speed high efficiency, strong corrosion resistance, and flexible pressure adaptation, becoming a reliable fluid transfer solution for desalination projects.


Operating on the axial piston principle, its plungers (parallel to the drive shaft) reciprocate in bores to adjust pump cavity volume, enabling efficient transfer of low-viscosity corrosive media (seawater, industrial saline wastewater). Unlike traditional pumps, it uses the transported fluid as lubricant, eliminating oil tanks and oil leakage to meet desalination’s strict cleanliness demands. The integrated flushing check valve simplifies RO membrane system design, reducing installation space and costs—perfect for continuous-operation small/medium desalination equipment.

Core Advantages for Water Treatment

  • Medium-Speed High Efficiency: 1800 rpm rated speed delivers 4.0 m³/h flow (3.5-4.0 m³/h range), with small pulses, low vibration, and ≤77 dB(A) noise (per EN ISO 3744-2010). Ideal for factory wastewater desalination and medium-sized island seawater desalination.
  • Strong Corrosion Resistance & Flexible Pressure: Key components use 2205 duplex stainless steel, resisting high-salinity corrosion. 20-80 Bar continuous outlet pressure adapts to different RO membrane osmotic pressures, offering high application flexibility.

Core Technical Parameters of DHP 4.0

Parameter Category Specific Value
Product Model DHP 4.0
Geometric Displacement 32 cm³/rev
Rated Flow (1800 rpm) 4.0 m³/h (73.3 L/min)
Minimum Outlet Pressure 20 Bar
Maximum Continuous Outlet Pressure 80 Bar (Contact FENIGAL sales for other requirements)
Minimum/Maximum Inlet Pressure 2 Bar / 5 Bar
Continuous Operating Speed Range 700～1800 rpm
Operating Noise (EN ISO 3744-2010) ≤77 dB(A) (measured on full unit at max pressure/speed)
Power (1800 rpm & 80 Bar) 15.0 kW
Medium Temperature 2～50 ℃ (NaCl concentration-dependent)
Ambient Temperature 0～50 ℃
Overall Weight 18 kg
Integrated Component Flushing Check Valve
Core Application Medium-sized seawater desalination, industrial wastewater desalination, resource recovery

Power Parameters (1800 rpm Rated Speed)

Pump Model Rated Flow (L/min) Rated Flow (m³/h) Power at 60 Bar Power at 70 Bar Power at 80 Bar Rated Speed (rpm)
DHP 4.0 73.3 4.0 11.0 kW 11.0 kW 15.0 kW 1800

Inlet & Outlet Dimensions

Piston Pump Model Inlet Size Outlet Size
DHP 4.0 G1-1/4〞, 20 mm Depth G3/4〞, 20 mm Depth

Overall Dimensions (mm, with Motor)

Piston Pump A B H K P AD HD C D L G IEC Motor
DHP 4.0 216 178 132 12 300 220 350 203 204 560 967 7.5 kW - 4P
DHP 4.0 254 210 160 15 350 260 420 203 204 605 1012 11 kW - 4P
DHP 4.0 254 254 160 15 350 260 420 203 204 645 1052 15 kW - 4P

Installation & Operation Tips

  1. Interface Connection: "I" = inlet (G1-1/4〞, 20 mm), "O" = outlet (G3/4〞, 20 mm). Match specs to avoid reverse connection damage to check valves/plungers.
  2. Filtration Requirement: Install 10 μm absolute filter (≥99.98% efficiency, β10>5000) at inlet—prohibit 90% efficiency filters to prevent plunger sleeve wear.
  3. Pressure Protection: Inlet low-pressure switch (2 Bar) prevents dry running; outlet high-pressure switch (70 Bar) + safety valve (5-9 MPa) protects RO membranes/pipelines.
  4. Start-Up/Shutdown: Flush with fresh water after shutdown (add bactericide if >15 days shutdown). Never start with rear valve closed.

Maintenance & Warranty

  • Daily Maintenance: Check filter pressure difference (replace element if >0.5 Bar) to keep inlet fluid clean.
  • Regular Inspection: Full inspection every 8000 hours (check shaft seal leakage, plunger wear—replace parts if flow drops >10%).
  • Warranty: 1-year free maintenance (delivery date); 8000-hour maintenance-free warranty (if operated as required, max 18 months).

Manufacturer Information

  • Company: WUXI FENIGAL SCIENCE AND TECHNOLOGY CO., LTD. (FG Water Technologies)
  • Address: Chuangyi Industrial Park, No. 100 Dicui Road, Binhu District, Wuxi City, Jiangsu Province, China
  • Tel: +86-510-85163211
  • Mobile: +86-13646187144
  • Email: sales@fgwater.com

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