Dual Plate Check Valve RF200 – Spring-Loaded Backflow Prevention in GGG40
The dual plate check valve type RF200 is a compact, spring-loaded wafer non-return valve for industrial piping systems. Two semi-circular discs open with flow and close within fractions of a second on flow reversal – providing effective water hammer protection and pressure surge prevention.
Key technical data:
- Nominal sizes: DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300
- Flange connection: DIN PN10/PN16
- Face-to-face length per EN 558-1 Series 16
- Body: GGG40 (EN-GJS-400-15), epoxy-coated RAL 5015
- Plates: stainless steel CF8M
- Shaft and spring: stainless steel SS316
- Max. operating pressure: 16 bar
Seat Materials – EPDM or NBR
- EPDM vulcanised: for water, air and aqueous media up to +120 °C
- NBR vulcanised: for oils, greases and hydrocarbons up to +80 °C
The vulcanised sealing surface ensures a durable, dimensionally stable seal – even with frequent closing cycles and varying pressure conditions.
Why a Dual Plate Check Valve Instead of a Single-Disc Design?
- Faster closing: two shorter plates close faster than one long disc – significantly reducing pressure surges and water hammer.
- Low pressure loss: symmetrical flow path with low resistance coefficient – suitable for high-volume flows.
- Compact design: wafer body per EN 558-1 Series 16 – space-saving even in tight plant layouts.
- Any installation orientation: horizontal, vertical or inclined – the spring assists closing regardless of gravity.
Applications
- Pump stations and pressure boosting systems
- Water and wastewater treatment
- Heating, cooling and HVAC systems
- Process industry and plant engineering
- Industrial cooling circuits and power plants
- Shipbuilding and marine applications
Buy the Dual Plate Check Valve RF200 Online at Fergo
The dual plate check valve RF200 is available from stock at Fergo in all nominal sizes. For higher corrosion resistance, Fergo offers the dual plate check valve RF202 in full stainless steel. As a single-disc alternative with a wider range of materials and seat options, the wafer check valve RK100 is available.
