Can the Check valve for shutting off the flow of hydraulic fluid, stainless steel, type FPR be installed for bidirectional flow systems or only in A â A1 direction?

Check valve for shutting off the flow of hydraulic fluid, stainless steel, type FPR is intended for unidirectional use: it closes flow in one direction and allows free flow in the opposite direction. The product specification states permissible flow direction A â A1, so it is not suitable for bidirectional flow systems; it must be installed with flow from A to A1 to operate as designed.

Is the FKM sealing compatible with aggressive hydraulic fluids for the Check valve for shutting off the flow of hydraulic fluid, stainless steel, type FPR?

Yes. the FKM sealing used in the Check valve for shutting off the flow of hydraulic fluid, stainless steel, type FPR is generally compatible with many aggressive hydraulic fluids. FKM (fluoroelastomer) offers excellent resistance to hydraulic oils, mineral oils, synthetic esters, and many aggressive additives, and the valveâs specified operating temperature range (-10Â°C to +180Â°C) falls within typical FKM performance limits. However, compatibility can vary with specific fluid formulations (especially phosphate esters, some silicone-based fluids, water-glycol mixtures, strong acids/alkalis, and certain aggressive solvents) and with long-term exposure at high temperature and pressure. For critical applications, confirm compatibility by: - Checking the exact hydraulic fluid chemical composition and additives against FKM compatibility charts. - Considering operating conditions (temperature near +180Â°C, pressure cycles). - Running supplier compatibility tests or consulting the fluid and seal manufacturers. If the fluid is known to be compatible with FKM under your operating conditions, the Check valve for shutting off the flow of hydraulic fluid, stainless steel, type FPR is an appropriate choice.

Check valve for shutting off the flow of hydraulic fluid, stainless steel, type FPR

Q: What is the standard opening pressure and are other opening pressures available for the Check valve for shutting off the flow of hydraulic fluid, stainless steel, type FPR?

The standard opening pressure for the Check valve for shutting off the flow of hydraulic fluid, stainless steel, type FPR is 0.5 bar. Other opening pressures available are 2.5 bar, 5 bar and 10 bar.

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Additional information

Material	SS – stainless steel

FPR type check valve designed for high-pressure hydraulic and industrial installations. It closes the flow of medium in one direction and opens free flow of medium in the opposite direction. Standard opening pressure: 0.5 bar (also available in 2.5, 5, and 10 bar). Permissible flow direction A → A1. Material: AISI 316 steel (body), AISI 316 steel (stem). Sealing: FKM. Operating temperature: from -10°C to +180°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
DC-FPR-04-SS	Check valve FPR GW 1/4", AISI 316, viton seal	-	350	In stock	Enquiry
DC-FPR-06-SS	Check valve FPR GW 3/8", AISI 316, viton seal	-	350	In stock	Enquiry
DC-FPR-08-SS	FPR check valve 1/2", AISI 316, viton seal	-	350	In stock	Enquiry
DC-FPR-12-SS	FPR 3/4" check valve, AISI 316, viton seal	-	300	In stock	Enquiry
DC-FPR-16-SS	FPR 1" check valve, AISI 316, viton seal	-	250	In stock	Enquiry
DC-FPR-20-SS	FPR check valve GW 1.1/4", AISI 316, viton seal	-	250	In stock	Enquiry
DC-FPR-24-SS	Check valve FPR GW 1.1/2", AISI 316, viton seal	-	250	In stock	Enquiry

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FPR type check valve designed for high-pressure hydraulic and industrial installations. It closes the flow of medium in one direction and opens free flow of medium in the opposite direction. Standard opening pressure: 0.5 bar (also available in 2.5, 5, and 10 bar). Permissible flow direction A → A1. Material: AISI 316 steel (body), AISI 316 steel (stem). Sealing: FKM. Operating temperature: from -10°C to +180°C.