What is the recommended procedure to adjust the opening pressure on the Pressure limiting bypass valve with GW BSP, type VM45, and how do I lock the setting?

Pressure limiting bypass valve with GW BSP, type VM45 . recommended adjustment and locking procedure: 1. Prepare system: relieve hydraulic pressure and stop pump. Ensure tank and P connections are accessible. 2. Locate adjustment screw: the opening pressure is set via an Allen-key screw on the valve. 3. Adjust setting: - Insert appropriate size Allen key into the adjustment screw. - Turn clockwise to increase opening pressure, counterclockwise to decrease. - Make small incremental turns and re-pressurize system briefly to verify pressure with a gauge until desired value (â¤ 260 bar) is reached. 4. Lock the setting: - Once the target opening pressure is achieved, secure the adjustment by tightening the locking nut provided over the adjustment screw. - Ensure the locking nut is tightened firmly to prevent drift during operation. 5. Final steps: remove Allen key, recheck for leaks, run the system and verify stable opening pressure and proper flow to tank (T) when limit is exceeded. Notes: use caution within operating temperature range (â20Â°C to +90Â°C) and ensure seals (NBR) and materials suit your fluid.

How often should the Pressure limiting bypass valve with GW BSP, type VM45 be inspected and serviced to ensure reliable opening pressure?

For reliable opening pressure, inspect and service the Pressure limiting bypass valve with GW BSP, type VM45 at least every 6 months under normal operating conditions. If the system operates near the maximum rating (close to 260 bar), in dirty environments, with high duty cycles, or with wide temperature swings (-20Â°C to +90Â°C), increase frequency to every 3 months. Each inspection should check for correct opening pressure (adjust with the Allen key and lock the nut), signs of wear or corrosion on the galvanized steel parts, integrity of NBR seals, aluminum body condition, secure mounting, and free flow between P ports and proper drainage to tank via T. Replace seals or the valve if leakage, pressure drift, or mechanical damage is found.

What safety precautions should be taken when testing the opening pressure of the Pressure limiting bypass valve with GW BSP, type VM45?

When testing the opening pressure of the Pressure limiting bypass valve with GW BSP, type VM45, follow these safety precautions: - Isolate and depressurize system before connecting test equipment. Verify zero pressure at all ports. - Use only pressure gauges and test equipment rated above the valveâs maximum operating pressure (â¥260 bar). - Wear appropriate PPE: safety goggles, gloves and protective clothing to guard against highâpressure fluid spray. - Securely mount the valve using its mounting holes or a fixture to prevent movement or ejection when the T path opens. - Ensure all connections (GW BSP ports, hoses, fittings) are compatible, clean and properly tightened to prevent leaks. - Use an adjustable pressure source with controlled, slow pressure increase to avoid sudden spikes. Monitor pressure continuously. - Keep clear of potential fluid discharge path (tank return) and ensure tank or reservoir can safely accept sudden flow when the valve opens. - Prevent exposure of components to temperatures outside â20Â°C to +90Â°C during testing; cold or hot conditions can affect sealing (NBR) and materials. - Protect nearby aluminum and galvanized steel parts from mechanical damage and avoid corrosive fluids that may compromise materials or seals. - Lock the adjustment screw after testing with the locking nut; ensure the Allen key is removed before pressurizing. - Have a pressure relief plan and emergency shutdown accessible; never stand over or in line with fittings under test. - Inspect valve and seals after testing for leaks or damage before returning to service. Adhering to these precautions minimizes risk when testing the opening pressure of the Pressure limiting bypass valve with GW BSP, type VM45.

Pressure limiting bypass valve with GW BSP, type VM45

All products, Pressure control valves/

Additional information

Material	AL – aluminum
Standard length [m]	20

VM45 relief valve limiting maximum oil pressure in hydraulic systems. Allows free flow of fluid between P connections. When pressure exceeds the set value, the T path opens and excess oil drains to the tank. The opening pressure value is set using a screw (adjustment with an Allen key, locked with a locking nut). The valve is equipped with mounting holes. Body material: aluminum. Valve material: galvanized steel. Sealing: NBR. Maximum operating pressure: 260 bar. Operating temperature: from -20°C to +90°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
DC-VM45-00-06	VM45 relief valve with 3/8" BSP thread, 40 l/min, 0-50 bar	-	260	In stock	Enquiry
DC-VM45-00-08	VM45 relief valve with 1/2" BSP thread, 40 l/min, 0-50 bar	-	260	In stock	Enquiry
DC-VM45-05-06	VM45 relief valve with 3/8" BSP thread, 40 l/min, 50-200 bar	-	260	In stock	Enquiry
DC-VM45-05-08	VM45 relief valve with 1/2" BSP thread, 40 l/min, 50-200 bar	-	260	In stock	Enquiry

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VM45 relief valve limiting maximum oil pressure in hydraulic systems. Allows free flow of fluid between P connections. When pressure exceeds the set value, the T path opens and excess oil drains to the tank. The opening pressure value is set using a screw (adjustment with an Allen key, locked with a locking nut). The valve is equipped with mounting holes. Body material: aluminum. Valve material: galvanized steel. Sealing: NBR. Maximum operating pressure: 260 bar. Operating temperature: from -20°C to +90°C.