Can the Screw-in Hydraulic Check Valve FPRI Type be installed with the O-ring on either side to change flow direction without affecting its 0.5 bar opening pressure?

Yes. The Screw-in Hydraulic Check Valve FPRI Type can be installed with the O-ring on either side to change the allowable flow direction without altering its specified 0.5 bar opening pressure. The valve is designed for reversible O-ring placement to select the desired flow path (permissible flow from A to A1), while the spring/seat geometry and calibrated opening pressure remain unchanged. Ensure the valve is screwed into a correctly dimensioned threaded port and that the O-ring is properly seated to maintain NBR sealing performance and prevent leakage.

Does the Screw-in Hydraulic Check Valve FPRI Type require a specific torque or thread size when being screwed into a threaded hole to ensure proper sealing and function?

Screw-in Hydraulic Check Valve FPRI Type does not state a single, specific torque or thread size in the provided description. It is specified to be screwed into a “properly dimensioned threaded hole,” which implies you must match the valve’s thread size to the corresponding port thread and follow appropriate torque practices to ensure the O‑ring seal seats correctly without damaging the valve or port. Practical guidance: - Use the valve’s nominal thread size (from the manufacturer’s datasheet or part number) and the matching port thread standard (e.g., ISO/G, BSP, UN/UNC) — the description does not supply that detail. - Tighten to a controlled torque appropriate for the thread size and material (galvanized steel body into the host material) so the O‑ring compresses sufficiently for sealing but is not crushed. If no torque spec is available, follow standard torque tables for the thread type and diameter, then perform a pressure/leak test. - Ensure correct O‑ring placement (it can be mounted on either side per required flow direction) before installation. - If in doubt, consult the manufacturer’s technical datasheet or contact their support for exact thread dimensions and recommended installation torque to guarantee proper sealing and function.

Screw-in Hydraulic Check Valve FPRI Type

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Additional information

Material	CS – steel (cast iron)

The FPRI type check valve is a robust and reliable component designed for hydraulic systems, ensuring controlled fluid management by blocking flow in one direction while allowing unrestricted passage in the opposite. Engineered for easy installation, it is screwed directly into a properly dimensioned threaded hole and comes equipped with a versatile O-ring seal that can be mounted on either side of the valve, depending on the required flow direction. With a standard opening pressure of 0.5 bar and a permissible flow path from A to A1, this valve guarantees precise and efficient performance in demanding applications. Manufactured from high-quality galvanized steel for the body and hardened steel for the stem, it offers exceptional durability and resistance to wear. The NBR sealing ensures reliable tightness, while the wide operating temperature range from -20°C to +100°C makes it suitable for diverse working environments. Combining strength, precision, and adaptability, the FPRI check valve is an excellent choice for professionals seeking long-lasting and efficient hydraulic solutions.

List of product variants

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

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The FPRI type check valve is a robust and reliable component designed for hydraulic systems, ensuring controlled fluid management by blocking flow in one direction while allowing unrestricted passage in the opposite. Engineered for easy installation, it is screwed directly into a properly dimensioned threaded hole and comes equipped with a versatile O-ring seal that can be mounted on either side of the valve, depending on the required flow direction. With a standard opening pressure of 0.5 bar and a permissible flow path from A to A1, this valve guarantees precise and efficient performance in demanding applications. Manufactured from high-quality galvanized steel for the body and hardened steel for the stem, it offers exceptional durability and resistance to wear. The NBR sealing ensures reliable tightness, while the wide operating temperature range from -20°C to +100°C makes it suitable for diverse working environments. Combining strength, precision, and adaptability, the FPRI check valve is an excellent choice for professionals seeking long-lasting and efficient hydraulic solutions.