What is the adjustable pressure range and how do I set the Pressure Limiting Bypass Valve with GW BSP, VMPP Type using the Allen key?

What is the adjustable pressure range and how do I set the Pressure Limiting Bypass Valve with GW BSP, VMPP Type using the Allen key? Adjustable pressure range: - The Pressure Limiting Bypass Valve with GW BSP, VMPP Type has a maximum working pressure up to 400 bar. The exact adjustable opening pressure range is set within the valve’s design up to that 400 bar limit; use the pressure gauge connection (GW 1/4" BSP) to monitor the setpoint while adjusting. How to set using the Allen key: 1. Ensure system is depressurized and isolate the valve. 2. Attach a pressure gauge to the GW 1/4" BSP connection to read outlet pressure. 3. Loosen the locking nut on the adjustment screw. 4. Insert the appropriate Allen key into the adjustment screw. 5. Turn the Allen key clockwise to increase the opening (relief) pressure or counterclockwise to decrease it. 6. Operate the system slowly and observe the pressure gauge; adjust until the desired opening pressure is reached (within the valve’s range up to 400 bar). 7. Once set, tighten the locking nut to secure the adjustment. 8. Recheck under normal operating conditions to confirm setting; ensure seals and fittings are secure.

How often should the Pressure Limiting Bypass Valve with GW BSP, VMPP Type be inspected and recalibrated to ensure reliable pressure relief and sealing performance?

For reliable pressure relief and sealing performance, the Pressure Limiting Bypass Valve with GW BSP, VMPP Type should be inspected and recalibrated as follows: - Routine visual inspection: weekly to monthly — check for external damage, corrosion on galvanized surfaces, condition of NBR seals, mounting integrity, and any oil leakage around connections and the locking nut. - Functional check: every 3 months — verify free flow between P ports, correct opening of the T path at excess pressure, and that the Allen-key adjustment and locking nut move and secure properly. - Pressure gauge and setting verification (recalibration): every 6–12 months — confirm the opening pressure with a calibrated test gauge and adjust as needed using the Allen key; retighten the locking nut to secure the setpoint. - After service or abnormal events: immediately — inspect and recalibrate after any repair, accidental overload, contamination, or if the valve has been exposed above its rated limits ( >400 bar, or outside -20°C to +90°C). - Environment/usage-driven frequency: increase inspection and shorten recalibration intervals in heavy-duty, high-cycling, contaminated, or safety-critical applications. Always follow site-specific safety procedures and record inspections and calibrations. If precise intervals are required by regulation or OEM policy, prioritize those over the general guidance above.

Pressure Limiting Bypass Valve with GW BSP, VMPP Type

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Additional information

Material	CS – steel (cast iron)

The VMPP relief valve is a robust and reliable solution designed to control and secure hydraulic systems by limiting maximum oil pressure. It ensures unrestricted fluid flow between the P connections, while automatically opening the T path to discharge excess oil into the tank once the preset pressure threshold is exceeded. The opening pressure can be precisely adjusted with an Allen key via a screw mechanism, secured with a locking nut for safe and stable operation. For convenient monitoring, the valve features a pressure gauge connection (GW 1/4″ BSP) and is equipped with mounting holes for easy installation. Manufactured from high-quality galvanized steel, both the body and valve guarantee durability and resistance to demanding working conditions, while NBR sealing ensures reliable tightness. With a maximum working pressure of up to 400 bar and an operating temperature range from -20°C to +90°C, this valve delivers consistent performance, making it an excellent choice for professional hydraulic applications requiring safety, efficiency, and long-lasting reliability.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Price	Quantity	Actions	Catalogue
DC-VMPP-20-12	VMPP relief valve with 3/4" BSP thread, 120 l/min, 20-200 bar	-	400	In stock	0 €		Enquiry
DC-VMPP-50-12	VMPP relief valve with 3/4" BSP thread, 120 l/min, 50-400 bar	-	400	In stock	0 €		Enquiry

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The VMPP relief valve is a robust and reliable solution designed to control and secure hydraulic systems by limiting maximum oil pressure. It ensures unrestricted fluid flow between the P connections, while automatically opening the T path to discharge excess oil into the tank once the preset pressure threshold is exceeded. The opening pressure can be precisely adjusted with an Allen key via a screw mechanism, secured with a locking nut for safe and stable operation. For convenient monitoring, the valve features a pressure gauge connection (GW 1/4″ BSP) and is equipped with mounting holes for easy installation. Manufactured from high-quality galvanized steel, both the body and valve guarantee durability and resistance to demanding working conditions, while NBR sealing ensures reliable tightness. With a maximum working pressure of up to 400 bar and an operating temperature range from -20°C to +90°C, this valve delivers consistent performance, making it an excellent choice for professional hydraulic applications requiring safety, efficiency, and long-lasting reliability.