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Features

Max. Pressure : up to 10000 psi (689 bar) @ 70° F (21° C)
Temp. : -40° F to 400° F (-40° C to 204° C)
Material : SS316 (Standard), Optional Monel, Inconel, HC-276, SDSS, Alloy20
Size : 1/8” to 2”
Orifice : 2 mm to 25 mm
Springs : SS202 (Standard), Optional material SS304, Inconel X750, HC-276
O-Rings : Viton (Standard), Optional material Nitrile, Perfrez, kalrez, Buna-N
Cracking Pressure : 3 psi to 50 psi
Body : SS316 (Standard), Optional body material Monel, Inconel, HC-276, SDSS

Sour Gas Service

Valves can be supplied with wettted parts complying with NACE MR0175/MR0103 and ISO 15156 offering highest resistance to sulphide stress cracking.

Material of Construction

Sr. No.	Part	Qty.	Material
1	Body (Outlet)	1	A479-SS316 / Brass
2	Body (Inlet)	1	A479-SS316 / Brass
3	Spring	1	SS302/A313
4	‘O’ Ring	1	Viton / Buna-N
5	Poppet	1	A479-SS316 / Brass
6	Back Ferrule	1	A479-SS316 / Brass
7	Front Ferrule	1	A479-SS316 / Brass
8	Nut	1	A479-SS316 / Brass

Pressure / Temperature Rating

Pressure Rating	Size Path	Working Pressure
SS 316	1/8″ to 3/4″	6000 psig CWP (345 bar)
SS 316	1″	3000 psig CWP (207 bar)
Brass	1/8″ to 1″	3000 psig CWP (207 bar)

Working Temperature	Temperature Range
Viton seal	-15°F to 375°F (-26°C to 190°C)
Fluorocarbon Rubber	-15°F to 400°F (-26°C to 204°C)
Buna -N Rubber	-30°F to 275°F (-34°C to 135°C)
Neoprene Rubber	-45°F to 250°F (-43°C to 121°C)

Testing

100% factory tested.
Every valve is tested for cracking & reseal pressure.
Hydrostatic testing at 1.5 times of MWP.
Optional tests are available.

Cracking & Reseal Pressure

Cracking pressure is upstream pressure at which flow indication occurs.
Reseal pressure is upstream pressure where there is no flow.

Check Valve