Safety Valves

Spring Loaded Safety Relief Valve LCB 100 mm Class 150

Supreme Valves India — Conventional spring-loaded pressure safety relief valve with angle discharge and full-lift design in LCB for cryogenic and low-temperature liquid service to -46 deg C. Sized per API 520; manufactured and tested to API 526 and API 527. DN100 (4 inch) flanged Class 150 RF end connections. IBR certification available for boiler duty.

Key Applications

Steam Boiler Overpressure ProtectionProcess Vessel ReliefHot Water System SafetyOil and Gas OverpressureChemical Plant Relief
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Technical Specifications

Valve Type Spring Loaded Safety Relief Valve
Nominal Size DN100 (4 inch)
Pressure Class ASME Class 150
Body Material ASTM A352 Gr. LCB
End Connection Flanged RF per ASME B16.5 / DIN EN 1092-1
Design Standard API 526
Sizing Standard API 520
Testing Standard API 527
Set Pressure Application specific — factory set and tested
Manufacturer Supreme Valves India

Material of Construction (MOC)

Component / Part Available Materials
Body / Bonnet ASTM A352 Gr. LCB
Trim / Internals SS 304 / SS 316 per service
Spring / Diaphragm SS 302 / SS 316 / Inconel per temperature
Gasket Aramid fibre, non-asbestos or spiral wound SS316/graphite

Purchase Options

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Features & Benefits

LCB Body Construction

Low Temperature Carbon Steel body (ASTM A352 Gr. LCB) selected for cryogenic and low-temperature liquid service to -46 deg C.

Class 150 Flanged RF

DN100 (4 inch) raised-face flanged end connections for direct pipeline installation.

Export Documentation

Supplied with EN 10204 3.1 MTC, hydrostatic test report, and set-pressure certificate.

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  • Valve type: Spring Loaded Safety Relief Valve
  • Size: DN100 (4 inch)
  • Material: ASTM A352 Gr. LCB
  • Pressure class: ASME Class 150

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