Can the Screw-in check valve, used in hydraulic systems, type FPRI, be installed in either flow direction by relocating the supplied O-ring?

Yes. The Screw-in check valve, used in hydraulic systems, type FPRI is designed to allow installation for either flow direction by repositioning the supplied Oâring. The valve provides one-way closure in one direction and free flow in the opposite; by fitting the Oâring on the side corresponding to the desired sealed direction, you change which port is closed at rest. Ensure the Oâring is correctly seated and undamaged, install the valve into a suitably deep threaded hole, and respect the specified orientation for permissible flow A â A1 when configuring. Standard opening pressure is 0.5 bar; materials and sealing (galvanized steel, hardened steel stem, NBR) and temperature range (â20Â°C to +100Â°C) remain unchanged.

Does the Screw-in check valve, used in hydraulic systems, type FPRI, support higher opening pressures than the standard 0.5 bar?

Screw-in check valve, used in hydraulic systems, type FPRI has a standard opening pressure of 0.5 bar. The provided description does not state any adjustable or alternative spring options or variants that would allow higher opening pressures. Therefore, based solely on the given information, the FPRI supports an opening pressure of 0.5 bar; any higher opening pressure would require a different model or a modified/version specified by the manufacturer.

Is the Screw-in check valve, used in hydraulic systems, type FPRI, compatible with fluids other than mineral oil?

Screw-in check valve, used in hydraulic systems, type FPRI is designed and specified for use with mineral oilâbased hydraulic fluids. Its sealing material is NBR (nitrile rubber), and the body and stem are steel (galvanized and hardened). Compatibility with other fluids depends primarily on NBRâs chemical and temperature resistance: - NBR is generally compatible with: mineral oils, petroleum-based hydraulic fluids, some vegetable oils (limited), and some water-glycol fluids at low concentrations. - NBR is not recommended with: phosphate esters (e.g., Skydrol), some synthetic esters, many silicone fluids, ketones, strong oxidizers, and some aggressive solvents (e.g., aromatics, chlorinated hydrocarbons). - Temperature range given (â20Â°C to +100Â°C) limits use with fluids requiring higher or lower operating temperatures. Conclusion: Screw-in check valve, used in hydraulic systems, type FPRI may be used with fluids other than mineral oil only if those fluids are chemically compatible with NBR and operate within â20Â°C to +100Â°C. For phosphate esters, many synthetics, silicone fluids or other aggressive media, choose a valve with a compatible seal material (e.g., FKM/Viton, EPDM) or consult the valve manufacturer for confirmed compatibility.

Valve check screwed-in, used in systems hydraulic, type FPRI

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Additional information

Material	CS – steel (cast iron)

Valve check type FPRI used in systems hydraulic as element for closing flow fluid hydraulic in one direction and opening free flow fluid in direction opposite. Intended for screwing into an appropriately deep threaded hole. Supplied together with an O-ring, which constitutes sealing between valve, a threaded a hole. O-ring can install with one or the other side valve (depending on direction flow, which we want obtain). standard pressure opening: 0.5 bar. Permissible flow direction: A → A1. Material: steel galvanized (body), hardened steel (stem). Sealing: NBR. Operating temperature: from -20°C to +100°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
DC-FPRI-04	Check valve FPRI 1/4" male	-	350	In stock	Enquiry
DC-FPRI-06	Check valve FPRI 3/8" male	-	350	In stock	Enquiry
DC-FPRI-08	Check valve FPRI 1/2" male	-	350	In stock	Enquiry
DC-FPRI-12	Check valve FPRI 3/4" male	-	350	In stock	Enquiry

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Valve check type FPRI used in systems hydraulic as element for closing flow fluid hydraulic in one direction and opening free flow fluid in direction opposite. Intended for screwing into an appropriately deep threaded hole. Supplied together with an O-ring, which constitutes sealing between valve, a threaded a hole. O-ring can install with one or the other side valve (depending on direction flow, which we want obtain). standard pressure opening: 0.5 bar. Permissible flow direction: A → A1. Material: steel galvanized (body), hardened steel (stem). Sealing: NBR. Operating temperature: from -20°C to +100°C.