How does the Galvanized Steel VRDE Non-Return Valve for Actuator Backflow Protection prevent unintended actuator movement during both extension and retraction?

The Galvanized Steel VRDE Non-Return Valve for Actuator Backflow Protection prevents unintended actuator movement during both extension and retraction by hydraulically locking the actuator ports while allowing controlled, intentional flow paths. Key points: - Dual check arrangement: It connects to the actuator via C1 and C2 and permits only the designed paired flows (V1 → C1 with simultaneous C2 → V2, and V2 → C2 with simultaneous C1 → V1). This ensures that when pressure is applied to extend or retract, fluid moves only through the intended circuit and cannot backflow into the opposite chamber to cause uncontrolled motion. - Positive hydraulic lock: The hardened steel piston and NBR seals create a tight seal that prevents pressure loss through the valve when the actuator is supposed to hold position. Even if external lines are released or load changes, the valve blocks reverse flow that would move the piston rod. - Defined opening pressure: With a 3 bar opening pressure, the valve stays closed against minor pressure fluctuations, avoiding unintended actuation from small transients while still allowing deliberate movement when system pressure exceeds the threshold. - Robust construction and secure installation: The galvanized steel body, DIN 2353-compatible locking rings and nuts, and integrated mounting hole provide corrosion resistance, mechanical stability and leak-free connections—critical to maintaining the valve’s locking function under load and over time. Together these features ensure reliable prevention of unintended movement during both extension and retraction while allowing controlled, deliberate actuator operation.

How does the Galvanized Steel VRDE Non-Return Valve for Actuator Backflow Protection maintain sealing and prevent leaks under varying temperatures and pressures?

The Galvanized Steel VRDE Non-Return Valve for Actuator Backflow Protection maintains sealing and prevents leaks under varying temperatures and pressures through a combination of robust materials, precise engineering and standardized fittings. Key features: - Galvanized steel body provides dimensional stability and corrosion resistance, minimizing deformation that could compromise sealing across temperature swings. - Hardened steel piston ensures consistent mating surfaces and wear resistance, keeping internal clearances tight so leakage paths do not develop under pressure cycles. - NBR (nitrile) seals offer reliable elasticity and chemical compatibility across the specified -20°C to +100°C range, maintaining pliability to conform to mating surfaces and preserve a leak-tight barrier. - A defined opening pressure of 3 bar ensures the valve remains closed under lower pressures, preventing unintended flow while opening predictably when required. - Precision machining and fit between piston and bore reduce bypass leakage; the valve’s design permits controlled bidirectional flow only when intended, while blocking backflow. - Connections C1 and C2 use locking rings and nuts to DIN 2353 standards, providing secure, leak-free external joints that retain integrity under pressure and thermal cycling. - Overall robust construction plus integrated mounting hole ensure stable installation and alignment, reducing mechanical stresses that can cause seal failure. Together these elements ensure reliable tightness and leak prevention across the valve’s operating temperature and pressure range.

Galvanized Steel VRDE Non-Return Valve for Actuator Backflow Protection

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Additional information

Material	CS – steel (cast iron)

The VRDE check valve (hydraulic lock) is a reliable safety component designed to prevent unintended movements of double-acting actuators, ensuring full control during both piston rod extension and retraction. Engineered with precision, it features connections C1 and C2 on the actuator side, equipped with locking rings and nuts compliant with DIN 2353 standards, guaranteeing secure and leak-free installation. The valve allows controlled flow in both directions: V1 → C1 with simultaneous C2 → V2, and V2 → C2 with simultaneous C1 → V1, providing maximum flexibility in hydraulic circuit design. Its robust construction includes a galvanized steel body for high corrosion resistance and a hardened steel piston for long-lasting durability, while NBR seals ensure reliable tightness under demanding conditions. With an opening pressure of 3 bar and an operating temperature range from -20°C to +100°C, the VRDE valve delivers consistent performance even in harsh environments. Additionally, the integrated mounting hole simplifies installation, making it an ideal choice for modern hydraulic systems where safety, efficiency, and durability are essential.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
DC-VRDE-04-10L	VRDE controlled check valve GW 1/4", DIN 2353 10L	-	350	In stock	Enquiry
DC-VRDE-04-12L	VRDE controlled check valve GW 1/4", DIN 2353 12L	-	350	In stock	Enquiry
DC-VRDE-06-12L	VRDE controlled check valve GW 3/8", DIN 2353 12L	-	350	In stock	Enquiry
DC-VRDE-06-15L	VRDE controlled check valve GW 3/8", DIN 2353 15L	-	350	In stock	Enquiry
DC-VRDE-08-15L	VRDE controlled check valve GW 1/2", DIN 2353 15L	-	350	In stock	Enquiry

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The VRDE check valve (hydraulic lock) is a reliable safety component designed to prevent unintended movements of double-acting actuators, ensuring full control during both piston rod extension and retraction. Engineered with precision, it features connections C1 and C2 on the actuator side, equipped with locking rings and nuts compliant with DIN 2353 standards, guaranteeing secure and leak-free installation. The valve allows controlled flow in both directions: V1 → C1 with simultaneous C2 → V2, and V2 → C2 with simultaneous C1 → V1, providing maximum flexibility in hydraulic circuit design. Its robust construction includes a galvanized steel body for high corrosion resistance and a hardened steel piston for long-lasting durability, while NBR seals ensure reliable tightness under demanding conditions. With an opening pressure of 3 bar and an operating temperature range from -20°C to +100°C, the VRDE valve delivers consistent performance even in harsh environments. Additionally, the integrated mounting hole simplifies installation, making it an ideal choice for modern hydraulic systems where safety, efficiency, and durability are essential.