What is the required control signal pressure X to open the flow A1 â A in the Controlled check valve allowing free flow of hydraulic fluid, type FPS?

The required control signal pressure X to open the flow A1 â A in the Controlled check valve allowing free flow of hydraulic fluid, type FPS is: X = k Â· pA1 where: - k = control coefficient (dimensionless) - pA1 = pressure on the A1 side Thus the control signal must equal the control coefficient multiplied by the A1-side pressure. (Free flow A â A1 opens at 0.5 bar without X.)

How does the control coefficient affect the required X pressure to open flow A1 â A in the Controlled check valve allowing free flow of hydraulic fluid, type FPS?

The required X pressure to open flow A1 â A in the Controlled check valve allowing free flow of hydraulic fluid, type FPS equals the control coefficient multiplied by the pressure present on the A1 side. Thus: X_required = control_coefficient Ã P_A1. A higher control coefficient increases the X pressure needed for a given A1 pressure; a lower coefficient reduces the required X. The valveâs standard free-flow opening (A â A1) is 0.5 bar and does not affect the A1 â A controlled opening calculation.

Can Controlled check valve allowing free flow of hydraulic fluid, type FPS open A1 â A without applying control signal X?

No. Controlled check valve allowing free flow of hydraulic fluid, type FPS does not allow free flow from A1 â A without applying control signal X. According to the description, free flow is permitted only in direction A â A1 (opening pressure 0.5 bar). Flow from A1 â A opens only when the pressure control signal X is applied; the required X pressure equals the control coefficient multiplied by the pressure on the A1 side. Without that control signal, the reverse flow remains closed.

Controlled check valve allowing free flow of hydraulic fluid, type FPS

All products, Directional control valves/

Additional information

Material	CS – steel (cast iron)

The FPS valve allows free flow of hydraulic fluid in one direction (A → A1) and the opening of fluid flow in the opposite direction (A1 → A) provided that a pressure control signal “X” is applied. The standard opening pressure for free flow (A → A1) is 0.5 bar. The required pressure of the control signal “X” for opening the flow in the opposite direction (A1 → A) is determined by the product of the control coefficient and the pressure on the A1 side. Material: galvanized steel (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-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: +48 61 653 02 22 or email us: tubes@tubes-international.com

SEND ENQUIRY

The FPS valve allows free flow of hydraulic fluid in one direction (A → A1) and the opening of fluid flow in the opposite direction (A1 → A) provided that a pressure control signal “X” is applied. The standard opening pressure for free flow (A → A1) is 0.5 bar. The required pressure of the control signal “X” for opening the flow in the opposite direction (A1 → A) is determined by the product of the control coefficient and the pressure on the A1 side. Material: galvanized steel (body), hardened steel (stem). Sealing: NBR. Operating temperature: from -20°C to +100°C.