Stainless steel AISI 316L high pressure relief valves, suitable for compressed air, gas and liquid.


Stainless steel AISI 316 L relief valve for inlet pressure up to 200 bar (2900 psi) for the standard version.
Inlet and outlet connections:
VSF3133: 1/4”
VSF31200: 3/8”
EN or ASME flanged connections available on request.

The relief valve opens when the inlet pressure increases above the set point initially regulated by the adjusting screw and it closes when the pressure goes down under the set point.
Available the ATEX 2014/34/EU version.
For use in potentially explosive atmospheres zones: 1, 21, 2, 22 (not in mines and zone 0).
Set point pressure is controlled by a piston.
The product complies with the directive 2014/68/EU PED


Technical data

CompatibilityCompressed air | Tecnhical gases and their mixtures | Liquids | Oils
IN/OUT ConnectionG 1/4”-F (VSF3133) | G 3/8”-F (VSF31200)
Working Temperature-4+140 °F standard | From -76 up to +608 °F on request
Maximum Allowable Pressure (PS)Standard 330 bar
CV (CEI EN 60534-2)0,081 US gal/min (VSF3133) | 0,75 US gal/min (VSF31200)
Relief Pressure Ranges10 ÷ 100 | 20 ÷ 200 bar (Available on request up to 400 bar)
Weight~6,2 lb (VSF3133) | 8,3 lb (VSF31200)
Plug Leakage Class“A” class (UNI EN 12266-1)
CertificationsPED 2014/68/UE | ATEX 2014/34/UE | EAC TR CU 010 | EAC Ex TR CU 012
Internals and Body MaterialStainless steel AISI 316L
Seals MaterialEPDM | FPM | FVMQ | FFKM
AccesoriesWall mounting bracket
Spare Parts KitO-rings | assembled plug

Technical design