What is the adjustable pressure range and locking method for the Pressure Limiting Bypass Valve with GW BSP, Model VM80?

Pressure Limiting Bypass Valve with GW BSP, Model VM80 — the opening pressure is adjustable via a screw operated with an Allen key and can be securely locked using a counter nut. The valve’s maximum operating pressure is 260 bar; the adjustable pressure range is therefore up to 260 bar (preset setpoint adjustable from low values up to the 260 bar limit), with the locking method provided by the counter nut.

How does the Pressure Limiting Bypass Valve with GW BSP, Model VM80 handle fluid compatibility and what seals are used to prevent leakage at high temperatures?

The Pressure Limiting Bypass Valve with GW BSP, Model VM80 handles fluid compatibility and high‑temperature sealing as follows: - Fluid compatibility: The VM80 is intended for hydraulic oil systems and is constructed with materials suited to standard mineral-based hydraulic fluids. Its aluminum body and galvanized steel internals provide corrosion resistance and mechanical durability compatible with typical hydraulic oils used up to the stated operating limits. - Seals and high‑temperature leakage prevention: The valve uses high-quality NBR (nitrile rubber) seals. NBR provides good resistance to wear, oil swelling and leakage for mineral oils across the VM80’s specified temperature range. The VM80 is rated for continuous operation from -20°C to +90°C; within this range the NBR seals maintain sealing integrity to prevent leakage under pressures up to 260 bar. The adjustable screw and counter nut locking help maintain set pressure without causing seal distortion that could lead to leaks. Note: For compatibility with non‑standard fluids (e.g., phosphate esters, synthetic fluids, or aggressive additives) or prolonged use above +90°C, consult the manufacturer for recommended seal materials or alternative configurations.

Valve overflow limiting pressure with a female BSP thread, type VM80

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Additional information

Material	AL – aluminum

Valve overflow VM80 limiting maximum pressure oil in systems hydraulic. allows free Flow rate liquids between connections P. W moment rise pressure over set value, occurs opening ways T and outflow excess oil for bowl. value pressure opening sets using screws (setting a wrench Allen, lock a lock nut). valve equipped in holes assembly. Material body: aluminum. Material valve: steel galvanized. sealing: NBR. maximum Working pressure: 260 bar. Operating temperature: od -20°C up to +90°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
DC-VM80-00-08	Valve overflow VM80 with 1/2" BSP female, 80 l/min, 5-50 bar	-	260	In stock	Enquiry
DC-VM80-00-12	Valve overflow VM80 with 3/4" BSP female, 80 l/min, 5-50 bar	-	260	In stock	Enquiry
DC-VM80-10-08	Valve overflow VM80 with 1/2" BSP female, 80 l/min, 30-260 bar	-	260	In stock	Enquiry
DC-VM80-10-12	Valve overflow VM80 with 3/4" BSP female, 80 l/min, 30-260 bar	-	260	In stock	Enquiry

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Valve overflow VM80 limiting maximum pressure oil in systems hydraulic. allows free Flow rate liquids between connections P. W moment rise pressure over set value, occurs opening ways T and outflow excess oil for bowl. value pressure opening sets using screws (setting a wrench Allen, lock a lock nut). valve equipped in holes assembly. Material body: aluminum. Material valve: steel galvanized. sealing: NBR. maximum Working pressure: 260 bar. Operating temperature: od -20°C up to +90°C.