Cast Iron Relief Check for Liquids (external spring)

PRESSURE / TEMPERATURE RATING: (detailed on Valve ID Plate) 

Min/Max spring set Pressures

Min Set Pressure 5psi (0.35 Bar)

Max Set Pressure 116psi (8.0 Bar)

MAX TEMPERATURE 40°C

FOR WATER INDUSTRY USE ONLY WITHIN THE EUROPEAN COMMUNITY

 

 

 

FLANGED:

• BS EN 1092-2 – PN6, PN10, PN16
• BS 10 TABLES – D, E, F
• ANSI B 16.1 – CLASS 125

CONSTRUCTION:

• This traditional design is suitable for systems with open discharge to atmosphere.
• The external spring is not in contact with the discharge liquid.
• The valve is intended to relieve excess liquid, and must not be used as a safety valve to prevent system failure  as referenced in the Pressure Systems Safety Regulations SI 2000 No 128
• Flanges will be drilled unless otherwise specified on order

MATERIALS:

• Body/Cover – Cast Iron to BS EN 1561 EN GJL 250
• Disc – Stainless Steel Casting ASME SA 487 CA6NM class A
• Seat Ring – Stainless Steel Casting to BS EN 10283 1.4408
• Spring – Spring Alloy Steel Design in accordance with BS 1726 Chrome Vanadium Alloy Coated

Nominal Size       (Fig.195)	50	65	80	100
A	125	145	155	178
B	316	372	410	527
Nominal Size       (Fig.196)	50	65	80	100
A	203	216	241	292
B	324	368	421	544