Can the Hydraulic system safety valve, type FFP be installed in systems with working temperatures from -30Â°C to +100Â°C without additional seals?

Yes. The Hydraulic system safety valve, type FFP can be installed in systems operating between â30Â°C and +100Â°C without additional seals. Its metal-to-metal sealing and specified operating temperature range (â30Â°C to +100Â°C) mean no extra elastomeric seals are required for temperature compatibility. Ensure that environmental factors (corrosion, contamination) and system pressure/flow conditions match the valveâs specifications and that installation, maintenance, and material compatibility (carbon steel, galvanized body; hardened steel valve) are acceptable for your application.

Does the Hydraulic system safety valve, type FFP require special installation when used with abrasive fluids or contaminants?

No special installation procedure is required specifically for abrasive fluids or contaminants for the Hydraulic system safety valve, type FFP. However, because the valve uses metal-to-metal sealing and hardened steel internals, abrasive particles can accelerate wear and potentially affect long-term performance. To ensure reliable operation when abrasive fluids or contaminants are present, follow good-practice measures: install effective filtration upstream, provide regular maintenance and inspection, consider pre-filtration or particle separators, and ensure correct orientation for permitted flow direction A â A1 (free) and A1 â A (valve). The valveâs materials and -30Â°C to +100Â°C rating support robust service, but protection from abrasive contamination extends service life and reliability.

Is the Hydraulic system safety valve, type FFP suitable for systems using biodegradable or synthetic hydraulic oils?

Hydraulic system safety valve, type FFP is not suitable for systems using biodegradable or synthetic hydraulic oils if compatibility with metal-to-metal sealing and galvanized carbon steel is a concern. The valveâs sealing is metal-to-metal (no elastomeric seals), body is carbon steel, galvanized, and the valve element is hardened steel. These materials are generally compatible with conventional mineral oils, but some biodegradable or synthetic fluids (especially phosphate esters, certain polyalkylene glycols, or aggressive esters) can be chemically aggressive to zincâgalvanized surfaces or promote corrosion, accelerated wear or altered lubrication properties for metalâtoâmetal contacts. Additionally, biodegradable/synthetic oils often have different viscosity, lubricity and additive packages which can affect the valveâs response to sudden flow changes and longâterm wear of metal seating surfaces. Recommendation: verify compatibility with the specific hydraulic fluid manufacturer and review corrosion/wear data for zincâgalvanized and hardened steel in that fluid. If uncertainty remains, consider a valve with corrosionâresistant coatings or materials (stainless steel, suitable surface treatments) or consult the valve maker for explicit approval with the intended biodegradable/synthetic oil.

Hydraulic system safety valve, type FFP

All products, Flow control valves/

Additional information

Material	CS – steel (cast iron)

FFP 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-FFP-04	FFP safety valve GW 1/4"	-	350	In stock	Enquiry
DC-FFP-06	FFP safety valve GW 3/8"	-	350	In stock	Enquiry
DC-FFP-08	FFP safety valve GW 1/2"	-	350	In stock	Enquiry
DC-FFP-12	FFP safety valve GW 3/4	-	350	In stock	Enquiry
DC-FFP-16	FFP safety valve GW 1"	-	300	In stock	Enquiry

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FFP 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.