Sempell Model SOT High Pressure Steam Safety Valve, Disc Spring
The Sempell Model SOT High Pressure Steam Safety Valve by Emerson is a disc spring–loaded valve engineered for precise, reliable overpressure protection in steam and high-temperature systems. Its innovative disc spring design ensures stable, repeatable performance under extreme thermal and mechanical stress, making it ideal for power plants and boiler applications.
The Sempell Model SOT High Pressure Steam Safety Valve, developed by Emerson, is a disc spring–loaded, high-performance safety valve designed for steam and high-pressure applications requiring exceptional reliability, rapid response, and long service life. Specifically engineered for power plants, steam turbines, and boiler systems, the Sempell SOT provides accurate overpressure protection in critical high-temperature environments. Unlike conventional helical spring valves, the disc spring design in the SOT model delivers precise set pressure control, reduced spring relaxation, and consistent lifting performance under severe thermal and mechanical stress. This ensures repeatable opening and closing behavior, even after thousands of cycles, making it ideal for continuous-duty, high-energy steam service. The SOT Safety Valve combines compact construction, optimized flow dynamics, and superior sealing integrity, ensuring minimal leakage and rapid full-lift operation. Its rugged materials, precision-guided components, and erosion-resistant seating surfaces guarantee durability and reliability in supercritical and subcritical boiler systems.
Technical Specification of Sempell Model SOT High Pressure Steam Safety Valve, Disc Spring
- Size Inlet:
- DN 100 – DN 600
NPS 4 – NPS24
- Temperature Range:
- Up to +700 °C / +1300 °F
- Set pressure:
- 10 bar – 450 bar
- Orifice diameter
- 66 mm – 438 mm
- Design:
- Open bonnet
Balanced piston
Disc spring type
pneumatically assisted
- Body material:
- 1.0460/SA105
1.0619/SA216 WCB
1.7335/SA182 F12
1.7357/SA217 WC6
1.7380/SA18 F22
1.7379/SA217 WC9
1.4903/SA182 F91
1.4901/SA182 F92
- Accessories:
- Position indicator
Feature of Sempell Model SOT High Pressure Steam Safety Valve, Disc Spring
- High tightness up to set pressure due to supplementary load
- Smooth operation (no forces by popping)
- Disc spring allows higher forces compared to helical spring. This results in high set pressures even for high capacities.
- Mechanical lift stop ensures functional stability
- Locking for hydrostatic test without additional parts
- High allowable back pressure