DHP 2.1 Axial Piston Pump 7.8kg Compact High-Pressure Water Treatment Consumables for Small-Medium Desalination

Product Details:

Place of Origin: China
Brand Name: Fenigal
Certification: CE
Model Number: DHP 2.1

Payment & Shipping Terms:

Minimum Order Quantity: 1 pc
Price: Negotiable
Packaging Details: standard export packing
Supply Ability: 60000 Units per Month
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Detail Information
Product Model: DHP 2.1 Geometric Displacement: 11.8 Cm³/rev
Rated Flow At Rated Speed (3000 Rpm): 2.1 M³/h (equivalent To 35 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)
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Product Description

The DHP 2.1 axial piston pump, a compact and efficient water treatment consumable, is tailored for small/medium seawater & industrial desalination systems—ideal for island desalination equipment and factory wastewater desalination devices. Developed by WUXI FENIGAL, it excels in high-pressure stability, strong corrosion resistance, and space-saving design, becoming a reliable fluid transfer solution for small-scale desalination projects.


Operating on the axial piston principle, its plungers (parallel to the drive shaft) reciprocate in bores to adjust pump cavity volume, enabling high-pressure 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. Weighing only 7.8 kg with an integrated flushing check valve, it simplifies RO membrane system design, reducing installation space and costs.

Core Advantages for Water Treatment

  • High-Pressure Stability & Low Interference: 80 Bar continuous working pressure meets RO system needs; ultra-low pulse, ≤77 dB(A) noise (per EN ISO 3744-2010), fitting environment-sensitive industrial sites.
  • Corrosion Resistance & Flexible Flow: Key components use 2205 duplex stainless steel for high-salinity resistance; 3000 rpm rated speed delivers 2.1 m³/h flow, with adjustable motor speed to match different system demands.

Core Technical Parameters of DHP 2.1

Parameter Category Specific Value
Product Model DHP 2.1
Geometric Displacement 11.8 cm³/rev
Rated Flow (3000 rpm) 2.1 m³/h (35 L/min)
Minimum Outlet Pressure 20 Bar
Maximum Continuous Outlet Pressure 80 Bar (Contact FENIGAL sales for other requirements)
Minimum/Maximum Inlet Pressure 1 Bar / 5 Bar
Continuous Operating Speed Range 700～3450 rpm
Operating Noise (EN ISO 3744-2010) ≤77 dB(A) (measured on full unit at max pressure/speed)
Power (3000 rpm & 80 Bar) 7.5 kW
Medium Temperature 2～50 ℃ (NaCl concentration-dependent)
Ambient Temperature 0～50 ℃
Overall Weight 7.8 kg
Integrated Component Flushing Check Valve
Core Application Small/medium seawater desalination, industrial wastewater desalination, resource recovery

Power Parameters (3000 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 2.1 35 2.1 5.5 kW 5.5 kW 7.5 kW 3000

Inlet & Outlet Dimensions

Piston Pump Model Inlet Size Outlet Size
DHP 2.1 G3/4〞, 18 mm Depth G3/4〞, 18 mm Depth

Overall Dimensions (mm, with Motor)

Piston Pump A B H K P AD HD C D L G IEC Motor
DHP 2.1 216 140 132 12 300 220 350 165 155 520 840 5.5 kW - 2P
DHP 2.1 216 140 132 12 300 220 350 165 155 560 880 7.5 kW - 2P

Installation & Operation Tips

  1. Interface Connection: "I" = inlet, "O" = outlet (both G3/4〞, 18 mm). Strictly avoid reverse connection to prevent plunger/check valve damage.
  2. Filtration Requirement: Install 10 μm absolute filter (≥99.98% efficiency, β10>5000) at inlet—prohibit 90% efficiency filters to avoid plunger wear.
  3. Pressure Protection: Inlet low-pressure switch (1 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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