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Relief Valves

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High Pressure Features

  • Max. Pressure : 6000 psi (413 bar) @ 100° F (38° C)
  • Set Pressure : 10 to 6000 psi
  • Temp. : -40° F to 400° F (-40° C to 204° C)
  • Material : SS316 (Standard)
  • Size : 1/8” to 1”
  • Orifice : 0.2”
  • Springs : Color coded springs for easy identification of set pressure range.
  • Body : Forged / A479

Low Pressure Features

  • Set Pressure : up to 225 psi
  • Springs : Single spring for complete set pressure range.
  • Spring is factory installed.

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.

Set Pressure Rating

SET PRESSURE RATING
No. Spring Color Set Pressure
psi bar
A White 50 to 350 3.4 to 24.1
B Blue 350 to 750 24.1 to 51.7
C Gold 750 to 1500 51.7 to 103
D Black 1500 to 2250 103 to 155
SET PRESSURE RATING
No. Spring Color Set Pressure
psi bar
E Green 2250 to 3000 155 to 206
F Yellow 3000 to 4000 206 to 275
G Brown 4000 to 5000 275 to 344
H Orange 5000 to 6000 340 to 413

Material of Construction VRVLP (Low Pressure)

MATERIAL OF CONSTRUCTION VRVLP (LOW PRESSURE)
Sr. No.Part NameQty.Material
1Body1SS316
2Spindle1SS316
3Adaptor1SS316
4Spindle Cap1SS316
5Cap1SS316
6Lock Nut1SS316
7Spring1SS302
8Seat1Viton
9‘O’ Ring1Viton / Neoprene

Material of Construction VRVHP (High Pressure)

MATERIAL OF CONSTRUCTION VRVHP (HIGH PRESSURE)
Sr. No. Part Name Qty. Material
1 Body 1 SS316
2 ‘O’ Ring Cap 1 SS316
3 ‘O’ Ring 1 Viton
4 ‘O’ Ring Nut 1 SS316
5 Spindle 1 SS316
6 Adaptor 1 SS316
7 Spindle Cap 1 SS316
8 Cap 1 SS316
9 Lock Nut 1 SS316
10 Spring 1 SS302
11 ‘O’ Ring 1 Viton

Testing

  • 100% factory tested.
  • Every valve is tested for set & reseal pressure.
  • Shell test – 1.5 times of MWP
  • Optional tests are available.