How does the FPS type controlled check valve for unrestricted hydraulic fluid flow calculate the required control pressure based on the A1 side pressure and control coefficient?

The FPS type controlled check valve for unrestricted hydraulic fluid flow calculates the required control pressure (X) by multiplying the pressure on the A1 side (pA1) by the valve’s control coefficient (k). In formula form: X = k × pA1. This means the higher the A1-side pressure or the larger the control coefficient, the greater the control pressure needed to allow reverse flow (A1 → A). The valve still permits unrestricted forward flow (A → A1) above its standard opening pressure of 0.5 bar; reverse flow is only enabled when the computed control pressure X is applied.

How does the FPS type controlled check valve for unrestricted hydraulic fluid flow behave when the control signal “X” fails or is lost during reverse flow from A1 → A?

If the control signal “X” fails or is lost during reverse flow from A1 → A, the FPS type controlled check valve for unrestricted hydraulic fluid flow will remain closed to reverse flow. Reverse passage from A1 to A is only permitted when the required control pressure at X is present (calculated as control coefficient × pressure on A1). Without that control pressure, the valve blocks A1 → A, preventing unintended backflow and maintaining system safety. Note: forward flow A → A1 remains unrestricted (opens at ~0.5 bar) regardless of the X signal.

FPS type controlled check valve for unrestricted hydraulic fluid flow

All products, Directional control valves/

Additional information

Material	CS – steel (cast iron)

The FPS valve is a robust and efficient hydraulic component designed to ensure reliable fluid control in demanding applications. It enables unrestricted hydraulic flow in one direction (A → A1) with a standard opening pressure of just 0.5 bar, while allowing reverse flow (A1 → A) only when a pressure control signal “X” is applied, ensuring precise and safe system operation. The required control pressure is calculated as the product of the control coefficient and the pressure on the A1 side, providing flexibility and adaptability to various hydraulic setups. Built with a durable galvanized steel body and a hardened steel stem, the valve guarantees long-lasting performance even under intensive use. High-quality NBR sealing ensures excellent resistance to wear and leakage, while the wide operating temperature range from -20°C to +100°C makes it suitable for diverse industrial environments. With its combination of strength, precision, and reliability, the FPS valve is an ideal choice for modern hydraulic systems that demand both efficiency and safety.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
DC-FPS-04	FPS 1/4" controlled check valve, 1/4" control	-	350	In stock	Enquiry
DC-FPS-06	FPS 3/8" controlled check valve, 1/4" control	-	350	In stock	Enquiry
DC-FPS-08	FPS 1/2" controlled check valve, 1/4" control	-	350	In stock	Enquiry
DC-FPS-12	FPS 3/4" controlled check valve, 1/4" control	-	300	In stock	Enquiry
DC-FPS-16	FPS 1" controlled check valve, control GW 1/4"	-	260	In stock	Enquiry

Do you need a larger quantity of products or a bespoke quote?

Call us: +91 8 925 918 796 or email us: chennai@tubes-international.com

SEND ENQUIRY

The FPS valve is a robust and efficient hydraulic component designed to ensure reliable fluid control in demanding applications. It enables unrestricted hydraulic flow in one direction (A → A1) with a standard opening pressure of just 0.5 bar, while allowing reverse flow (A1 → A) only when a pressure control signal “X” is applied, ensuring precise and safe system operation. The required control pressure is calculated as the product of the control coefficient and the pressure on the A1 side, providing flexibility and adaptability to various hydraulic setups. Built with a durable galvanized steel body and a hardened steel stem, the valve guarantees long-lasting performance even under intensive use. High-quality NBR sealing ensures excellent resistance to wear and leakage, while the wide operating temperature range from -20°C to +100°C makes it suitable for diverse industrial environments. With its combination of strength, precision, and reliability, the FPS valve is an ideal choice for modern hydraulic systems that demand both efficiency and safety.