Description
The Seko HYDRAKOS Water-Driven Pump 2500 l/ph 3-10% PVDF/EPDM is a non-electric proportional chemical dosing pump designed to provide accurate, repeatable chemical injection using only water pressure and flow. Manufactured with a PVDF (Polyvinylidene Fluoride) pump body and EPDM seals, this model offers exceptional chemical compatibility and is ideal for dosing alkaline chemicals, sodium-based solutions, oxidising agents, and a wide range of water treatment chemicals.
Powered entirely by a hydraulic motor, the pump automatically injects chemicals in direct proportion to the water flow, providing precise dosing even when water pressure or flow rate fluctuates. Its self-priming design, adjustable dosing ratio and corrosion-resistant construction provide reliable performance while helping to reduce maintenance and operating costs.
Features:
- Water-driven proportional dosing pump.
- No electrical power required.
- Adjustable dosing range from 3–10%.
- Maximum water flow rate of 2,500 l/ph.
- PVDF pump body with exceptional chemical compatibility.
- EPDM seals for excellent compatibility with alkaline chemicals.
- Superior thermal stability and stress crack resistance.
- High corrosion resistance.
- Self-priming operation.
- Accurate and repeatable proportional dosing.
- Injection automatically stops when water flow stops.
- Suitable for fresh, salt, and deionised water.
- Compact, lightweight, and easy to install.
- Low operating and maintenance costs.
Specifications:
- Product Code: WDPD25RE100EV00.
- Series: Seko HYDRAKOS D25RE100.
- Pump Type: Water-driven proportional dosing pump.
- Maximum Water Flow Rate: 2,500 l/ph.
- Body Material: PVDF (Polyvinylidene Fluoride).
- Seal Material: EPDM.
- Adjustable Dosing Range: 3–10%.
- Water Flow Range: 10–2,500 l/ph.
- Maximum Chemical Viscosity: 400 cPs at 20°C.
- Power Supply: Water pressure and flow only (Non-electric).
Applications:
- Drinking water treatment.
- Water purification systems.
- Irrigation and fertigation.
- Fertiliser injection.
- Agricultural chemical dosing.
- Livestock and poultry farming.
- Industrial process dosing.
- Cooling water treatment.
- Car wash systems.
- Legionella control.
- Chemical injection systems.
- Mining applications.

Installation:
Install the pump directly into the water supply line following the indicated flow direction. Ensure the operating water pressure and flow remain within the specified limits. Use chemical-resistant tubing compatible with PVDF and EPDM materials. For optimum performance, install a filter upstream where debris may be present and periodically inspect the suction line and seals as part of routine maintenance.
Why choose the Seko HYDRAKOS water-driven pump 2500 l/ph 3-10% PVDF/EPDM?
- Provides accurate proportional chemical dosing without electricity.
- Adjustable dosing ratio from 3–10% for higher chemical injection requirements.
- PVDF body offers exceptional chemical compatibility.
- Superior thermal stability and resistance to stress cracking.
- High corrosion resistance for demanding industrial and water treatment applications.
- EPDM seals are ideal for alkaline chemicals and sodium-based solutions.
- Self-priming design simplifies commissioning.
- Automatically stops dosing when water flow stops, preventing chemical waste.
- Suitable for agricultural, industrial, commercial, and water treatment applications.
- Low maintenance design with long service life.
- Trusted SEKO engineering for reliable and consistent chemical dosing.
Seko HYDRAKOS – Water-Driven Pumps









