PRODUCTS

S51 – VSF123 – VSF123/34

Brass relief valves, suitable for compressed air, gas and liquid.

Product

Relief valve for pressure up to 50 bar (725 psi).
Inlet and outlet connections 1” – F and 3/4” – F.

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.
Set point pressure is controlled by a rubber diaphragm for pressure up to 15 bar (217, 5 psi), by a piston for greater pressure.

The product complies with the directive 2014/68/EU PED.

CHARACTERISTICS

Technical data

CompatibilityCompressed air | Tecnhical gases and their mixtures | Liquids | Oils
IN/OUT ConnectionG 3/4”-F | G 1”-F | 3/4”NPT-F | 1”NPT-F (VS123) | G 1”1/2-F | G 2”-F | 1”1/2NPT-F | 2”NPT-F | UNI EN 1092-1 | ASME B16.5 (VS130)
Working Temperature-4+140 °F standard | From -76 up to +608 °F on request
Maximum Allowable Pressure (PS)22,5 bar (diaphragm) | 70 bar (piston)
CV (CEI EN 60534-2)5,7 US gal/min (VS123) | 26,5 US gal/min (VS130)
Relief Pressure Ranges0,2 ÷ 1,5 | 0,3 ÷ 3 | 0,8 ÷ 8 | 1,5 ÷ 15 | 3 ÷ 30 | 5 ÷ 50 bar
Weight~11,1 lb (VS123) | ~29,7 lb (VS130)
Plug Leakage Class“A” class (UNI EN 12266-1)
CertificationsPED 2014/68/UE | EAC TR CU 010* (*only available on VSF123)
Internals and Body MaterialBrass
Seals MaterialEPDM | FPM | FVMQ | FFKM
AccesoriesWall mounting bracket
Spare Parts KitO-rings | assembled plug | assembled diaphragm (if applicable)
TECHNICAL DESIGN

Technical design