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Dual Plate Check Valve - Double Swing Check Valve

A double swing check valve - double plate check valve is used in piping systems to control and prevent the flow of liquids or gases in one direction. This dual plate check valve is designed to ensure that flow occurs in one direction only, while blocking it in the opposite direction.
Fergo offers double swing check valves made of ductile iron and stainless steel. The double swing check valves are available from DN50 - DN300 PN10/16 in wafer design. The dual plate check valve seats are available in NBR and EPDM. The swing plate of the double swing check valves are made of high quality stainless steel. The shaft and spring used in the double check valves are made of stainless steel.

Double Swing Check Valve Uses

A dual plate check valve is used in the pipeline for various applications to prevent the unwanted backflow of gases or liquid. Here are some examples of applications for double check valves: Sewage systems, potable water supply, industrial applications, heating and cooling systems, air conditioning, pumping systems, swimming pools, fire suppression systems and more.

Product Configurator

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Doppel-Rückschlagklappe aus Edelstahl für Abwasser, Wasser, Gas
RF202 Dual plate check valve DN 200 PN10/16 EPDM stainless steel with spring Product number: 302-1030-16
Wafer type double-plate check Valve DN 200 PN10/16Installation between flanges acc. to DIN PN10/16, body & plates made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), seal EPDM vulcanised (max. 120°C) - Suitable for general applications with non-aggressive liquids, Max. operating pressure 16 bar.
Seal :
EPDM
Nominal width :
DN200 - 8'' inch
Body:
Stainless Steel (1.4408)
Execution :
Doppelflügel-Rückschlagklappe

€605.00*

€719.95 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Doppel-Rückschlagklappe aus Edelstahl für Abwasser, Wasser, Gas
RF202 dual plate check valve DN 150 PN10/16 EPDM stainless steel with spring Product number: 302-1030-14
Wafer type double plate Check Valve DN 150 PN10/16Installation between flanges acc. to DIN PN10/16, body & blade made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), gasket EPDM vulcanised (max. 120°C) - Suitable for general applications with non-aggressive liquids, Max. operating pressure 16 bar.
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN150 - 6'' inch
Seal :
EPDM
Body:
Stainless Steel (1.4408)

€388.50*

€462.32 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Doppel-Rückschlagklappe aus Edelstahl für Abwasser, Wasser, Gas
RF202 Dual plate check valve DN 65 PN10/16 NBR stainless steel with spring Product number: 302-1031-10
Wafer type double plate Check Valve DN 65 PN10/16Installation between flanges acc. to DIN PN10/16, body & plate made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), gasket NBR vulcanised (max. 80°C) - NBR versions are used for gases, oils, alkalis, waste water or acids, Max. operating pressure 16 bar.
Execution :
Doppelflügel-Rückschlagklappe
Body:
Stainless Steel (1.4408)
Nominal width :
DN65 - 2 1/2'' inch
Seal :
NBR

€108.50*

€129.11 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Edelstahl Doppelflügel-Rückschlagklappe
RF200 dual plate check valve DN 300 PN10 EPDM ductile cast iron stainless steel with spring Product number: 302-1020-20
Wafer type double swing check valve DN 300 PN10Installation between flanges acc. to DIN PN10, body made of (GGG40)ductile iron, blade made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), gasket EPDM vulcanised (max. 120°C), Max. Max. operating pressure 10 bar, paint epoxy 150µm, RAL 5015
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN300 - 12'' inch
Seal :
EPDM
Body:
Ductile Cast Iron (GGG40)

€552.00*

€656.88 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Doppel-Rückschlagklappe aus Edelstahl für Abwasser, Wasser, Gas
RF202 Dual plate check valve DN 250 PN10/16 EPDM stainless steel with spring Product number: 302-1030-18
Wafer type double-plate check valve DN 250 PN10/16Installation between flanges acc. to DIN PN10/16, body & blade made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), gasket EPDM vulcanised (max. 120°C) - Suitable for general applications with non-aggressive liquids, Max. operating pressure 16 bar.
Nominal width :
DN250 - 10'' inch
Body:
Stainless Steel (1.4408)
Seal :
EPDM
Execution :
Doppelflügel-Rückschlagklappe

€1,012.00*

€1,204.28 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Doppel-Rückschlagklappe aus Edelstahl für Abwasser, Wasser, Gas
RF202 Dual plate check valve DN 250 PN10/16 NBR stainless steel with spring Product number: 302-1031-18
Wafer type double plate check valve DN 250 PN10/16Installation between flanges acc. to DIN PN10/16, body & leaf made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), gasket NBR vulcanised (max. 80°C) - NBR versions are used for gases, oils, alkalis, waste water or acids, Max. operating pressure 16 bar.
Seal :
NBR
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN250 - 10'' inch
Body:
Stainless Steel (1.4408)

€1,012.00*

€1,204.28 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Doppel-Rückschlagklappe aus Edelstahl für Abwasser, Wasser, Gas
RF202 Dual plate check valve DN 150 PN10/16 NBR stainless steel with spring Product number: 302-1031-14
Wafer type double plate Check Valve DN 150 PN10/16Installation between flanges acc. to DIN PN10/16, body & plates made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), gasket NBR vulcanised (max. 80°C) - NBR versions are used for gases, oils, alkalis, waste water or acids, Max. operating pressure 16 bar.
Seal :
NBR
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN150 - 6'' inch
Body:
Stainless Steel (1.4408)

€388.50*

€462.32 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Edelstahl Doppelflügel-Rückschlagklappe
RF200 dual plate check valve DN 80 PN10/16 NBR nodular cast iron stainless steel with spring Product number: 302-1021-11
Wafer double check valve DN 80 PN10/16Installation between flanges acc. to DIN PN10/16, body made of (GGG40)ductile iron, leaf made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), gasket NBR vulcanised (max. 80°C), Max. Max. operating pressure 16 bar, paint epoxy 150µm, RAL 5015
Seal :
NBR
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN80 3'' inch
Body:
Ductile Cast Iron (GGG40)

€67.00*

€79.73 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Edelstahl Doppelflügel-Rückschlagklappe
RF200 dual plate check valve DN 125 PN10/16 NBR nodular cast iron stainless steel with spring Product number: 302-1021-13
Double swing check valve DN 125 PN10/16Installation between flanges acc. to DIN PN10/16, Body made of (GGG40)ductile iron, Leaf made of CF8M stainless steel, Shaft & spring made of stainless steel (SS316), Gasket NBR vulcanised (max. 80°C) - NBR versions are used for gases, oils, alkalis, waste water or acids, Max. Operating pressure 16 bar, Paint Epoxy 150µm, RAL 5015
Seal :
NBR
Nominal width :
DN125 - 5'' inch
Execution :
Doppelflügel-Rückschlagklappe
Body:
Ductile Cast Iron (GGG40)

€120.50*

€143.39 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Doppel-Rückschlagklappe aus Edelstahl für Abwasser, Wasser, Gas
RF202 Dual plate check valve DN 300 PN10 NBR stainless steel with spring Product number: 302-1031-20
Wafer type double plate check valve DN 300 PN10Installation between flanges acc. to DIN PN10, body & plates made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), seal NBR vulcanised (max. 80°C) - NBR versions are used for gases, oils, alkalis, waste water or acids, Max. operating pressure 16 bar.
Seal :
NBR
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN300 - 12'' inch
Body:
Stainless Steel (1.4408)

€1,443.00*

€1,717.17 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Edelstahl Doppelflügel-Rückschlagklappe
RF200 dual plate check valve DN 150 PN10/16 EPDM ductile cast iron stainless steel with spring Product number: 302-1020-14
Intermediate flange double swing check valve DN 150 PN10/16Installation between flanges acc. to DIN PN10/16, body made of (GGG40)ductile iron, leaf made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), gasket EPDM vulcanised (max. 120°C), Max. Max. operating pressure 16 bar, paint epoxy 150µm, RAL 5015
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN150 - 6'' inch
Seal :
EPDM
Body:
Ductile Cast Iron (GGG40)

€161.00*

€191.59 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Edelstahl Doppelflügel-Rückschlagklappe
RF200 dual plate check valve DN 300 PN10 NBR nodular cast iron stainless steel with spring Product number: 302-1021-20
Double swing check valve DN 300 PN10Installation between flanges acc. to DIN PN10, Body made of (GGG40)ductile iron, Leaf made of CF8M stainless steel, Shaft & spring made of stainless steel (SS316), Gasket NBR vulcanised (max. 80°C) - NBR versions are used for gases, oils, alkalis, waste water or acids, Max. Operating pressure 10 bar, Paint epoxy 150µm, RAL 5015
Seal :
NBR
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN300 - 12'' inch
Body:
Ductile Cast Iron (GGG40)

€552.00*

€656.88 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Edelstahl Doppelflügel-Rückschlagklappe
RF200 dual plate check valve DN 200 PN10/16 NBR nodular cast iron stainless steel with spring Product number: 302-1021-16
Double swing check valve DN 200 PN10/16Installation between flanges acc. to DIN PN10/16, Body made of (GGG40)ductile iron, Leaf made of CF8M stainless steel, Shaft & spring made of stainless steel (SS316), Gasket NBR vulcanised (max. 80°C) - NBR versions are used for gases, oils, lyes, waste water or acids, Max. Operating pressure 16 bar, Paint Epoxy 150µm, RAL 5015
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN200 - 8'' inch
Body:
Ductile Cast Iron (GGG40)
Seal :
NBR

€259.00*

€308.21 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Edelstahl Doppelflügel-Rückschlagklappe
RF200 dual plate check valve DN 100 PN10/16 NBR nodular cast iron stainless steel with spring Product number: 302-1021-12
Intermediate flange double check valve DN 100 PN10/16Installation between flanges acc. to DIN PN10/16, Body made of (GGG40)ductile iron, Leaf made of CF8M stainless steel, Shaft & spring made of stainless steel (SS316), Gasket NBR vulcanised (max. 80°C) - NBR versions are used for gases, oils, alkalis, waste water or acids, Max. Operating pressure 16 bar, Paint Epoxy 150µm, RAL 5015
Seal :
NBR
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN100 - 4'' inch
Body:
Ductile Cast Iron (GGG40)

€91.00*

€108.29 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Doppel-Rückschlagklappe aus Edelstahl für Abwasser, Wasser, Gas
RF202 Dual plate check valve DN 50 PN10/16 NBR stainless steel with spring Product number: 302-1031-09
Wafer type double plate check valve DN 50 PN10/16Installation between flanges acc. to DIN PN10/16, body & plates made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), gasket NBR vulcanised (max. 80°C) - NBR versions are used for gases, oils, alkalis, waste water or acids, Max. operating pressure 16 bar.
Seal :
NBR
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN50 - 2'' inch
Body:
Stainless Steel (1.4408)

€79.50*

€94.60 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Edelstahl Doppelflügel-Rückschlagklappe
RF200 dual plate check valve DN 65 PN10/16 EPDM ductile cast iron stainless steel with spring Product number: 302-1020-10
Wafer type double swing check valve DN 65 PN10/16Installation between flanges acc. to DIN PN10/16, body made of (GGG40)ductile iron, leaf made of CF8M stainless steel, shaft & spring made of stainless steel (SS316), gasket EPDM vulcanised (max. 120°C), Max. Max. operating pressure 16 bar, paint epoxy 150µm, RAL 5015
Execution :
Doppelflügel-Rückschlagklappe
Nominal width :
DN65 - 2 1/2'' inch
Seal :
EPDM
Body:
Ductile Cast Iron (GGG40)

€50.50*

€60.10 incl. VAT
Delivery time: in stock

Available, delivery time: in stock

Intermediate flange double check valve stainless steel & GGG40


The dual plate check valve consists of two valve elements mounted in one body. Each individual flap element is designed to open in the direction of the permitted flow and close in the direction of the blocked flow.
The design of the dual plate check valve allows flow to be effectively controlled in both directions. When the pressure or flow is in the preferred direction, the damper elements open automatically to allow flow. However, in the event of a sudden backflow or pressure change, the flaps close immediately to prevent backflow.
Double swing check valves are used in a wide variety of applications, including water and wastewater systems, industrial process plants, chemical plants, heating and cooling systems, and the food and beverage industry. They help maintain the integrity of the piping system, prevent contamination and ensure the flow of media in one direction.