Safety Relief Valve

Design Features

• Spring-loaded, direct-acting safety valve

• Top-guided poppet for consistent operation

• Lever-operated mechanism for manual release

• Flanged connections for easy pipeline mounting

• Suitable for use in low to medium pressure systems

• Typically complies with ASME Section VIII or Section I, depending on application

• Blowdown ring (optional) for adjustable reseating pressure

Cast Iron Safety Relief Valve

Material of Construction

• Body & Bonnet: Cast Iron (GG25 / ASTM A126 Class B)

• Trim (Seat & Disc): Stainless Steel (SS304 / SS316) or Bronze

• Spring: Chrome Vanadium Steel or Stainless Steel

• Lever & External Parts: Mild Steel or Stainless Steel (coated/painted for corrosion resistance)

• Gasket/Seals: Graphite or PTFE

Sizes Available

• Typically available in:

  • 1/2" to 6" (15 mm to 150 mm)

• Larger sizes may be available for industrial/custom applications

Pressure Rating

• Standard Pressure Ratings:

  • 125 psi (PN10)

  • 150 psi (PN16)

  • Some models can go up to 300 psi (PN25) for specific applications

• Set Pressure Range:

  • Usually adjustable between 15 psi to 300 psi

  • Can be factory set or field adjustable depending on model

Carbon Steel Safety Relief Valve

Design Features

• Spring-loaded, direct-acting type relief valve

• Lever-operated for manual pressure release and testing

• Top-guided spindle for accurate reseating and alignment

• Blowdown adjustment ring (optional feature for precise reseating pressure control)

• Flanged ends for secure piping connections (likely ANSI or DIN standard)

• Designed for steam, air, gas, and liquid applications

• Pop-action release mechanism ensures quick pressure discharge

Body & Bonnet: Carbon Steel (typically ASTM A216 Grade WCB)

• Disc/Seat: Stainless Steel (SS304 or SS316) for corrosion and wear resistance

• Spindle (Stem): Stainless Steel (SS304 or SS316)

• Spring: Chrome Vanadium Steel or Stainless Steel, depending on pressure range

• Lever & Pin: Mild Steel or Stainless Steel with anti-corrosive coating

• Gaskets & Seals: Graphite, PTFE, or metallic depending on temperature and media

• Fasteners (Bolts/Nuts): Carbon Steel or Alloy Steel, optionally galvanized or zinc-coated

Pressure Rating

• Working Pressure Range:

  • Up to 300 psi (20 bar) for standard models

  • Higher ratings (up to 600 psi / 40 bar) available for carbon steel construction

• Set Pressure Range: Adjustable from 15 psi to 600 psi depending on spring and trim configuration

• Typically follows ASME Section VIII or DIN pressure relief standards

Size Available

• Common size range:

  • 1/2” to 6” (15 mm to 150 mm)

• Larger sizes may be available upon request

• Inlet/Outlet connections:

  • Flanged as standard (ANSI B16.5 or DIN EN1092-1)

Design Features

• Type: Spring-loaded pressure relief valve

• Operation: Automatic pressure release when system pressure exceeds preset level

• End Connections: Flanged inlet and outlet for secure pipeline attachment

• Set Pressure Range: Adjustable based on application requirements

• Discharge: Top vent for safe release of fluids or gases

• Manual Lever: Allows for manual release/testing

• Compliance: Typically designed in accordance with ASME Section VIII Div. 1 or API 526 standards

Stainless Steel Safety Relief Valve

Material of Construction (MOC)

• Body: Stainless Steel SS316 / SS304

• Bonnet: Stainless Steel SS316 / SS304

• Spring: Stainless Steel SS316

• Disc: Hardened Stainless Steel

• Seat: Hardened Stainless Steel

• Stem: Stainless Steel

• Trim: Stainless Steel

• Gasket: PTFE / Graphite

• Fasteners (Bolts/Nuts): Stainless Steel

• Lever Handle: Stainless Steel

Size Available

• Nominal Sizes:

  • Typically from 1/2" to 4"

  • Larger sizes available on request depending on application

Pressure Rating

• Standard Pressure Classes:

  • ANSI 150, 300, 600

• Pressure Set Range:

  • From 15 psi up to 600 psi (1 to 41 bar), customizable as per requirement

• Tested Pressure: Hydrostatic tested at 1.5 times the rated pressure