What maintenance is required for the Non-return valve to prevent spontaneous movement of the actuator, galvanized steel, type VRDE to ensure reliable opening pressure and sealing?

Non-return valve to prevent spontaneous movement of the actuator, galvanized steel, type VRDE . Maintenance recommendations 1. Regular visual inspection - Check externally for corrosion, mechanical damage, loose fittings and proper mounting. Inspect the mounting hole fixation and DIN 2353 connections (locking rings and nuts) for tightness. 2. Leak and seal check - Periodically verify there are no external leaks at connections V1/V2 and C1/C2. Replace NBR seals if hardened, swollen or leaking. Recommended interval: every 6â12 months or sooner in aggressive environments. 3. Functional test - Test valve operation under system pressure: confirm reliable sealing at â¤3 bar and correct opening at â3 bar. Cycle actuator slowly to detect sticking or delayed opening. If valve fails to hold pressure or opens below spec, service or replace. 4. Cleanliness and contamination control - Ensure hydraulic fluid is clean and within manufacturer cleanliness class. Contaminants can wear the hardened steel piston and damage NBR seals. Replace or flush filters regularly. 5. Lubrication and part wear - No external lubrication required; inspect piston and seating for wear or scoring. If excessive wear on hardened steel piston or seat is found, replace the valve. 6. Temperature and material checks - Operate within â20Â°C to +100Â°C. At temperature extremes inspect NBR seals more frequently for loss of elasticity. 7. Replacement and spares - Keep spare NBR seals and a replacement valve available. After any repair, retest for correct opening pressure and sealing. Record all inspections and tests. If uncertain about internal condition, replace the Non-return valve to prevent unintentional actuator movement.

How does the Non-return valve to prevent spontaneous movement of the actuator, galvanized steel, type VRDE behave under temperature extremes (-20Â°C to +100Â°C)?

Non-return valve to prevent spontaneous movement of the actuator, galvanized steel, type VRDE operates reliably across the specified temperature range (-20Â°C to +100Â°C). The galvanized steel body and hardened steel piston maintain structural integrity within these limits, while the NBR seals remain functional and retain sealing properties between -20Â°C and +100Â°C. At the lower limit (-20Â°C) NBR may slightly harden, potentially increasing opening force marginally but still allowing operation at the 3 bar opening pressure. At the upper limit (+100Â°C) NBR approaches its maximum service temperature; long-term exposure can accelerate aging and reduce elasticity, which may affect seal life and leak tightness over time. For continuous use near +100Â°C consider periodic inspection or alternative seal materials for extended durability. Mounting and DIN 2353 connections are unaffected by these temperatures.

Can the Non-return valve to prevent spontaneous movement of the actuator, galvanized steel, type VRDE be installed in vertical piping orientations?

Yes. The Non-return valve to prevent spontaneous movement of the actuator, galvanized steel, type VRDE can be installed in vertical piping orientations. Its permissible flow directions (V1 â C1 with C2 â V2, and V2 â C2 with C1 â V1) and internal piston design allow operation independent of mounting orientation. The valve body is equipped with a mounting hole to secure it in vertical runs, and the hardened steel piston with NBR sealing and 3 bar opening pressure functions correctly within the specified operating temperature range (-20Â°C to +100Â°C). Ensure correct connection of C1 and C2 (actuator side) with DIN 2353 locking rings and nuts and secure mounting to prevent mechanical stress on fittings.

Valve check protecting against uncontrolled movement the actuator, steel galvanized, type VRDE

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Additional information

Material	CS – steel (cast iron)

Valve check (lock hydraulic) type VRDE used in hydraulic systems as an element protecting against uncontrolled movement of a double-acting actuator (retraction / extension of the piston rod). The C1, C2 connections (on the actuator side) are equipped with cutting rings and nuts acc. to DIN 2353. Permissible flow direction: V1 → C1 (and simultaneously C2 → V2), V2 → C2 (and simultaneously C1 → V1). valve equipped is in hole assembly. Material: steel galvanized (body), hardened steel (stem). Sealing: NBR. pressure opening: 3 bar. Operating temperature: from -20°C to +100°C.

List of product variants

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

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Valve check (lock hydraulic) type VRDE used in hydraulic systems as an element protecting against uncontrolled movement of a double-acting actuator (retraction / extension of the piston rod). The C1, C2 connections (on the actuator side) are equipped with cutting rings and nuts acc. to DIN 2353. Permissible flow direction: V1 → C1 (and simultaneously C2 → V2), V2 → C2 (and simultaneously C1 → V1). valve equipped is in hole assembly. Material: steel galvanized (body), hardened steel (stem). Sealing: NBR. pressure opening: 3 bar. Operating temperature: from -20°C to +100°C.