What is the standard cracking pressure and flow direction for the Throttling and check valve for hydraulic systems, type FPSU?

Throttling and check valve for hydraulic systems, type FPSU . standard cracking pressure and flow direction: - Standard cracking (opening) pressure: 0.5 bar. - Permissible flow direction: A â A1 = free flow (check valve open); A1 â A = throttled flow (flow regulated via knob).

How do I adjust the flow rate on the Throttling and check valve for hydraulic systems, type FPSU?

To adjust the flow rate on the Throttling and check valve for hydraulic systems, type FPSU, turn the knob located on the valve body. Clockwise rotation reduces the bypass opening and decreases flow from A1 â A (throttled direction); counterclockwise rotation increases the opening and raises flow. The valve allows free flow A â A1; adjustment affects only the throttled reverse direction. Do not exceed the valveâs standard opening pressure (0.5 bar) and operate within material/temperature limits (carbon steel body, steel spring/ball/knob, NBR seals, â20Â°C to +90Â°C). Make small incremental adjustments and verify system flow/pressure after each change.

Can the Throttling and check valve for hydraulic systems, type FPSU be used with fluids outside the -20Â°C to +90Â°C range?

Throttling and check valve for hydraulic systems, type FPSU Format: No. the valve is specified for fluids within an operating temperature range of â20Â°C to +90Â°C. The body is carbon steel (galvanized), internal parts are steel, and the sealing material is NBR (nitrile rubber). NBR has limited thermal stability and typical sealing performance only within the stated range; below â20Â°C it hardens and may leak or stick, and above +90Â°C it can soften, swell or degrade, causing loss of sealing, accelerated wear or failure. Additionally, changes in fluid viscosity outside that temperature band can affect metering, check operation and opening pressure. Using fluids outside â20Â°C to +90Â°C therefore risks malfunction, leakage and reduced service life. If operation outside this range is required, consult the manufacturer for alternative materials (e.g., Viton/FKM seals, different springs/balls) or a valve variant rated for the needed temperatures.

Throttling and check valve for hydraulic systems, type FPSU

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Additional information

Material	CS – steel (cast iron)

Throttle-check valve type FPSU used in hydraulic systems as a component to allow free flow in one direction. The flow throttled in the opposite direction is regulated using a knob. Standard opening pressure 0.5 bar. Permissible flow direction: A → A1 (free), A1 → A (throttled). Material: carbon steel, galvanized (body), steel (spring, ball, knob). Sealing: NBR. Operating temperature: from -20°C to +90°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
DC-FPSU-04	Throttle-check valve FPSU GW 1/4	-	300	In stock	Enquiry
DC-FPSU-06	Throttle-check valve FPSU GW 3/8	-	300	In stock	Enquiry
DC-FPSU-08	Throttle-check valve FPSU GW 1/2	-	280	In stock	Enquiry

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Throttle-check valve type FPSU used in hydraulic systems as a component to allow free flow in one direction. The flow throttled in the opposite direction is regulated using a knob. Standard opening pressure 0.5 bar. Permissible flow direction: A → A1 (free), A1 → A (throttled). Material: carbon steel, galvanized (body), steel (spring, ball, knob). Sealing: NBR. Operating temperature: from -20°C to +90°C.