Can the Hydraulic system safety valve, type MFP be serviced in-line without depressurizing the entire system?

No. The Hydraulic system safety valve, type MFP cannot be safely serviced in-line without depressurizing the system. Its function is to detect sudden excess flow (e.g., hose rupture) and mechanically close flow in the A1 â A direction; servicing requires access to the valve body and internals (hardened steel valve, metal-to-metal sealing) and risks oil loss, unintended actuation, or injury if pressure remains. Because the valve is part of the primary pressure-containing path and uses metal-metal seals, any disassembly or replacement of components must be performed on a depressurized, isolated system and following appropriate lockout/tagout and safe-drain procedures.

Is the Hydraulic system safety valve, type MFP compatible with other hydraulic fluids besides standard mineral oil?

Hydraulic system safety valve, type MFP uses metal-to-metal sealing and materials (carbon steel body, hardened steel valve) designed for standard mineral oil. Metal-metal seals and lack of elastomeric seals limit compatibility: many synthetic fluids, water-glycol, phosphate esters or fireâresistant fluids have different lubricity, corrosion and viscosity characteristics that can affect sealing, wear and operating temperature behaviour. Short answer: it may work with some other hydraulic fluids, but compatibility is not guaranteed. Before use with nonâmineral oils you must consult the manufacturer for approved fluids and perform compatibility tests (corrosion, wear, leakage, temperature performance). Use only fluids certified by the valve maker to avoid damage or loss of safety function.

How does the Hydraulic system safety valve, type MFP behave during rapid pressure spikes from actuator failure?

Hydraulic system safety valve, type MFP is designed to protect the hydraulic system from rapid oil loss caused by sudden actuator failure (e.g., hose rupture). Under normal operation it permits oil flow in both directions: freely from A â A1 and through the valve from A1 â A. When a rapid pressure spike or sudden high flow occurs due to a leak or rupture, the valve reacts by closing the flow in the A1 â A direction, effectively isolating the leaking branch and preventing large-volume oil evacuation. The valveâs metal-to-metal sealing and hardened-steel internal parts ensure a fast, reliable shutoff under high transient flows; the carbon-steel, galvanized body provides structural strength and corrosion resistance. The device operates across a wide temperature range (â30Â°C to +100Â°C), maintaining its protective function during rapid pressure excursions associated with actuator failure.

Hydraulic system safety valve, type MFP

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Additional information

Material	CS – steel (cast iron)

MFP valve protecting the hydraulic system from oil loss in the event of sudden leakage of the installation (e.g., hose rupture). During normal operation of the system, the valve allows oil flow in both directions. In the event of a sudden increase in flow (e.g., hose rupture), the valve closes the oil flow in one direction. Permissible flow direction: A → A1 (free), A1 → A (valve). Material: carbon steel, galvanized (body), hardened steel (valve). Sealing: metal-metal. Operating temperature: from -30°C to +100°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
DC-MFP-04	MFP GZ 1/4" safety valve	-	350	In stock	Enquiry
DC-MFP-06	MFP GZ 3/8" safety valve	-	350	In stock	Enquiry
DC-MFP-08	MFP GZ 1/2" safety valve	-	350	In stock	Enquiry
DC-MFP-12	MFP GZ 3/4" safety valve	-	350	In stock	Enquiry
DC-MFP-16	MFP GZ 1" safety valve	-	300	In stock	Enquiry

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MFP valve protecting the hydraulic system from oil loss in the event of sudden leakage of the installation (e.g., hose rupture). During normal operation of the system, the valve allows oil flow in both directions. In the event of a sudden increase in flow (e.g., hose rupture), the valve closes the oil flow in one direction. Permissible flow direction: A → A1 (free), A1 → A (valve). Material: carbon steel, galvanized (body), hardened steel (valve). Sealing: metal-metal. Operating temperature: from -30°C to +100°C.