What maintenance is recommended to ensure long-term sealing and corrosion resistance of the Pressure Limiting Bypass Valve with GW BSP, Type VM45?

To ensure long-term sealing and corrosion resistance of the Pressure Limiting Bypass Valve with GW BSP, Type VM45, follow these maintenance recommendations: - Regular inspection: visually inspect valve body, mounting areas and external components for signs of corrosion, pitting or mechanical damage at least every 3–6 months (more often in aggressive environments). - Cleanliness: keep ports, mounting holes and external surfaces free of dirt, debris and corrosive contaminants. Use a lint‑free cloth and mild solvent compatible with aluminum and galvanized steel. - Seal check and replacement: inspect NBR seals for hardening, cracking, swelling or extrusion each service interval (6–12 months depending on duty). Replace seals immediately if any degradation is found; use manufacturer‑specified NBR kits. - Fastener and adjustment security: verify the locknut and adjustment screw remain tight and free of corrosion. Apply appropriate thread antiseize or corrosion inhibitor sparingly on external threads if required, avoiding contamination of internal hydraulic fluid. - Corrosion protection: if the valve operates in corrosive or marine environments, apply a compatible protective coating or corrosion inhibitor to exposed galvanized steel and aluminum surfaces, avoiding seal contact. Consider additional sacrificial anodes or environmental enclosures where practical. - Fluid maintenance: maintain clean hydraulic fluid (correct spec, cleanliness class) and proper filtration to minimize internal wear and seal attack. Monitor fluid for contamination and change per system recommendations. - Functional testing: perform periodic pressure and leak tests under controlled conditions to confirm proper opening pressure and absence of external leaks. Readjust using the Allen key if drift occurs and secure with the locknut. - Storage and handling: store spare valves or spare seals in a dry, temperature‑controlled environment away from UV and solvents. Handle with care to avoid surface damage to protective coatings. Adhering to these practices will preserve the aluminum body, galvanized components and NBR seals of the Pressure Limiting Bypass Valve with GW BSP, Type VM45, maximizing sealing integrity and corrosion resistance.

Pressure Limiting Bypass Valve with GW BSP, Type VM45

Q: How do I adjust the opening pressure on the Pressure Limiting Bypass Valve with GW BSP, Type VM45, and lock it securely to prevent drift?

To adjust and lock the opening pressure on the Pressure Limiting Bypass Valve with GW BSP, Type VM45: 1. Ensure system is depressurized and valve accessible. 2. Insert an Allen key into the adjustment screw. 3. Turn the screw clockwise to increase opening pressure or counterclockwise to decrease it. Adjust slowly and monitor system pressure until the desired setting is reached (max 260 bar). 4. Once set, tighten the locking nut firmly against the adjustment screw to prevent drift. 5. Re-pressurize the system and verify the valve opens at the correct pressure. 6. If needed, readjust and re-lock; ensure seals and components are intact and mounting is secure. Note: Use appropriate tools and safety precautions; operating range -20°C to +90°C.

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Additional information

Material	AL – aluminum
Standard length [m]	20

The VM45 relief valve is a compact and reliable solution designed to protect hydraulic systems by precisely limiting maximum oil pressure. It ensures unrestricted fluid flow between the P ports, while automatically opening the T channel to safely redirect excess oil back to the tank once the preset pressure threshold is exceeded. The opening pressure can be easily adjusted with an Allen key via a screw mechanism, secured firmly with a locking nut for stable operation. Engineered for durability, the valve features a robust aluminum body combined with galvanized steel components, offering excellent resistance to wear and corrosion. High-quality NBR seals guarantee tightness and long-lasting performance even under demanding conditions. With a maximum operating pressure of 260 bar and a wide temperature range from -20°C to +90°C, the VM45 delivers consistent reliability across diverse applications. Convenient mounting holes simplify installation, making it an ideal choice for professionals seeking efficiency, safety, and precision in hydraulic system protection.

List of product variants

Article number	Product variant name	Nominal inner diameter	Working pressure [bar]
DC-VM45-00-06	VM45 relief valve with 3/8" BSP thread, 40 l/min, 0-50 bar	-	260
DC-VM45-00-08	VM45 relief valve with 1/2" BSP thread, 40 l/min, 0-50 bar	-	260
DC-VM45-05-06	VM45 relief valve with 3/8" BSP thread, 40 l/min, 50-200 bar	-	260
DC-VM45-05-08	VM45 relief valve with 1/2" BSP thread, 40 l/min, 50-200 bar	-	260

The VM45 relief valve is a compact and reliable solution designed to protect hydraulic systems by precisely limiting maximum oil pressure. It ensures unrestricted fluid flow between the P ports, while automatically opening the T channel to safely redirect excess oil back to the tank once the preset pressure threshold is exceeded. The opening pressure can be easily adjusted with an Allen key via a screw mechanism, secured firmly with a locking nut for stable operation. Engineered for durability, the valve features a robust aluminum body combined with galvanized steel components, offering excellent resistance to wear and corrosion. High-quality NBR seals guarantee tightness and long-lasting performance even under demanding conditions. With a maximum operating pressure of 260 bar and a wide temperature range from -20°C to +90°C, the VM45 delivers consistent reliability across diverse applications. Convenient mounting holes simplify installation, making it an ideal choice for professionals seeking efficiency, safety, and precision in hydraulic system protection.