Check valves

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Check valves | How to choose the right check valve
The check valve allows fluid to flow in one direction only, blocking its passage in the opposite direction. Fluid backflow can damage circuits, especially hydraulic circuits. These valves can also prevent liquid or steam leaks if there are faults in the pipe structure. They are also installed in sewage pipes to prevent backflow and the passage of bad smells. Check valves can be found in hydraulic pumps and motors, ventilation systems, pump pipes, hydraulic and pneumatic...
vacuum non-return valve
vacuum non-return valve
BNRV series

... release of the manipulated object is required • Prevents suction through the blow-off lines • Reduced feed pressure for full valve opening ...

piston check valve
piston check valve
SIC 0698xxx6K series

DN: 6 mm - 10 mm
Pressure: 1.5, 12.5 bar

... Use : welding and cutting Fluid : oxygen, acetylene Quick coupling : function ...

ball check valve
ball check valve
A24 series

DN: 0.125 in - 0.5 in
Pressure: 1 bar - 10 bar
Temperature: -10 °C - 130 °C

... Ease of use : Easy to install Construction : Brass and nickel-plated brass Safety : for ringmains Construction Brass body Highlight Network safety ...

ball check valve
ball check valve
GRS

DN: 15 mm - 80 mm
Pressure: 100 mbar - 5,000 mbar

... Non-return gas valve to prevent gas creepage or surge, for gas, air and oxygen. Features & Benefits: GRS: not flame-arresting GRSF: with sinter bronze flame arrester, so flame-arresting in the case of use with combustion ...

poppet check valve
poppet check valve
DT series

DN: 0.25 in - 1.25 in
Pressure: 0 psi - 5,000 psi
Temperature: -40 °F - 250 °F

... Parker check valves are unidirectional flow control devices used primarily in hydraulic systems to eliminate potential damage caused by fluid back pressure. DT Series Check Valves (up ...

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Parker Quick Coupling Division
lift check valve
lift check valve
BOA-R series

DN: 15 mm - 350 mm
Pressure: 16 bar
Temperature: -10 °C - 350 °C

... Lift check valve to DIN/EN with flanged ends, spring-loaded valve disc, maintenance-free. Benefits Check disc and closing springs made of stainless steel for high functional ...

swing check valve
swing check valve
BICV-0 series

DN: 0.25 in - 4 in
Pressure: 400, 125, 175 psi
Temperature: -12 °C - 178 °C

... The Series BICV Brass Inline Check Valves are ideal for use with a broad array of service mediums including compatible oils, gases, fuels and hydrocarbons. They incorporate a soft seat for a bubble-tight shutoff and are ...

poppet check valve
poppet check valve

Temperature: -20 °C - 70 °C

... For medium flow regulation ■ Robust, durable version ■ Delivery complete with DILO connecting parts ■ Available in DIN 1.0460 und 1.4571 materials ...

piston check valve
piston check valve
4000

DN: 10 mm - 80 mm
Pressure: 40 bar
Temperature: -30 °C - 200 °C

... Robust spring-loaded check valve type 4000 from Schubert & Salzer in seat cone design made of stainless steel with high flow rate for aggressive media and high operating temperatures. Size: DN 10 - DN 80 ...

swing check valve
swing check valve
VAC

... BALL CHECK VALVES Ball check valves VAP, with EN 12050-4 certification, are designed for use even with soiled liquids to provide full guarantees of operation in heavy-duty working conditions. ...

ball check valve
ball check valve
VAP 32÷50

... BALL CHECK VALVES VAP ball check valves prevent backflow during plant maintenance or stoppages. They are designed for use even with soiled wastewaters to provide full guarantees of operation ...

ball check valve
ball check valve
VAP 65÷300

... They can be installed horizontal or vertical and do not require any maintenance. All Zenit ball check valves hold certification under the EN 12050-4 standard, appendix ZA. ...

disc check valve
disc check valve
UNJ

DN: 47.63 mm
Pressure: 0 bar - 20.7 bar
Temperature: 0 °C - 71 °C

... Short Description
UNJ-thread straight-thru check valve in aluminum alloy for aviation fuel and hydrocarbon oil systems. Automatic, spring-loaded disk design with 1.875 in UNJ threads (12 TPI, right-hand) and ...

ball non-return valve
ball non-return valve
8714 series

... Retaining valve with embossed directional arrow or printed in black. With conical nozzles. Various uses. ...

threaded check valve
threaded check valve

... High quality sanitary stainless steel threaded check valve ...

high-pressure check valve
high-pressure check valve
VR series

Pressure: 450 bar - 4,200 bar
Temperature: -20 °C - 80 °C

... aforesaid valves allow not only to fill, but also to carry out the delivery under pressure with nominal diameters being double compared with the valves that are normally on the market for the pressure range up to 4200 ...

swing check valve
swing check valve
FLAP

... prevent the explosion propagating through the pipes that connect the equipment in question to the rest of the plant. The block valve is studied, designed and tested especially to safely partition the production rooms from the filters. ...

poppet check valve
poppet check valve

DN: 1 in - 4 in
Pressure: 0 bar - 10 bar
Temperature: 0 °C - 130 °C

... These AWH non-return valves are engineered for use in pipe lines, systems and machines in the food and drink industry. Suitable for liquid products, additives and cleaning liquids. These valves prevent pipelines running ...

steel check valve
steel check valve
3089204

DN: 0.25 in
Pressure: 0 bar - 30 bar

... This valve can be set from 0 till 30 BAR. It is used on the lubrication point. Key features: - Pressure: from 0 to 30 bar (adjustable) - Material: galvanized steel - Diameter port. 5 mm Elastomeric-plastic seal plate - Fittings: ...

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Dropsa spa
ball check valve
ball check valve
FR055-000

DN: 4.5 mm - 10 mm
Pressure: 0 bar - 1 bar
Flow rate: 2.2 l/min

... liquids and gases. The Flex Check® Zero Leak has integrated an additional plastic sealing element while maintaining exactly the same dimensions and is completely leak-free. Flex Check® high performance check ...

ball check valve
ball check valve
40 series

DN: 0.25 in - 1 in
Pressure: 0 bar - 1,500 bar
Temperature: -20 °C - 200 °C

... Duff-Norton Europe ball check valves for high or low pressure hydraulic circuits prevent flow reversal in a circuit or protect against overpressure that can occur in certain parts of a circuit. Unguided valves ...

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Duff-Norton Europe
NPT check valve
NPT check valve
50017x series

DN: 0.25 in

... Directional Control Valves. The 1⁄4 NPT (500172) and the SAE-4 (500174) “P” port check valves are required on all single acting or double acting circuits where there is more than one directional valve ...

pilote-operated check valve
pilote-operated check valve
158

Pressure: 1 bar - 10 bar
Temperature: -10 °C - 70 °C

... - Whitworth pipe thread - Thread G2 for manual override - Chambered O-ring - Sealing: NBR - Material: brass nickel plated, Al black anodized - Allowable medium: air - Temperature range 14 to 158 °F (-10 to +70 °C) - Working pressure range 14,5 ...

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EISELE GmbH
swing check valve
swing check valve
CRC - CRR

DN: 80 mm - 2,000 mm

... CRC-CRR flap valves are non-return valves allowing water flow in one direction. Wall-mounted or flange-mounted, they ensure high sealing with EPDM gaskets and effective closure aided by counterweights. The CRC-CRR ...

overcenter check valve
overcenter check valve
V0 series

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CICROSA HIDRAULICA, S.L.
check valve for the chemical industry
check valve for the chemical industry
FlowSyn

... The check valves we fit to FlowSyn are highly chemically inert. Nevertheless they do need cleaning periodically, both to avoid possible issues with pump performance and to prolong their working life. To make the cleaning ...

air check valve
air check valve

DN: 250 mm - 1,000 mm

ball check valve
ball check valve
EDCV

Pressure: 0 bar - 350 bar
Flow rate: 2.4 l/min

... Points Keep pressure in the cylinders even if there is leakage in the main hydraulic line between pump and double check valve. connecting the clamping cylinders in a crossed way. Advantages increase ...

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