Sempell Model VSE / VSR Direct Spring-Operated Safety Relief Valves

Precision-engineered safety relief valves designed for reliable pressure control in critical industrial applications, offering a wide range of flexible connection types and operational configurations.

Features & Benefits

1. Flexible Connection Options

   • Available with DIN flanges, ASME flanges, threaded, or welding end connections for seamless integration into various systems.

2. Precise Performance

   • Pop Action: Ensures rapid and reliable pressure relief.

   • Mechanical Lift Stop: Maintains functional stability under diverse operating conditions.

3. Enhanced Design

   • Supports high allowable back pressure for demanding applications.

   • One-Piece Spindle: Increases reliability and reduces maintenance complexity.

4. Optional Actuation

   • Can be fitted with an actuator for pneumatic operation, providing additional functionality and versatility.

Specifications

• Size:
  DN 25 – DN 200 (NPS 1" – 8")

• Pressure Rating:
  PN 10 – PN 500 (Class 150 – 2500)

• Temperature Range:
  -196 °C to +600 °C (-300 °F to +1100 °F)

• Set Pressure:
  0.5 – 500 bar

• Design Variants:

  • VSE1: Open bonnet

  • VSE2: Conventional

  • VSE4: Weight-loaded for low pressures

  • VSE5: Balanced bellows

  • VSR: Adjustable blowdown

• Body Material:

  • 1.0619 / SA216 WCB

  • 1.7357 / SA217 WC6

  • 1.4308 / SA351 CF8

  • 1.4581 / SA351 CF8MC

  • 1.6220 / SA352 LCC

  • Additional materials available upon request

• Accessories:
  Cooling spaces, balance piston, lifting lever, test gag, position indicator, soft seat.

Applications
The Sempell VSE/VSR models are ideal for industries such as oil & gas, power generation, and chemical processing, ensuring safe and efficient pressure relief in both low- and high-pressure systems.