SOT Sempell Model SOT Design With Welding End Or Flanged Connections High Pressure Steam Safety Valve

High pressure safety valve for boiler protection in disc spring design with welding end or flanged connections

Features

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

Specifications

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

Applications

EN12952 and TRD boilers. Saturated super-heated and super-critical steam. Also suitable for specific gas applications where full control is required.

These Controlled Safety Pressure Relief Systems (CSPRS) use an actuator to provide perfectly controlled performance in pressure protection in full compliance of EN and TRD requirements. These valves can be fully customized to perfectly suit the requirements of the application for seat tightness, overpressure and blowdown performances. Helical spring (Type SOH) or disc spring (Type SOT) for larger valves. Combined with STE4 electro-pneumatic control unit or STE5 pneumatic control unit, with redundances and in-line checks. TÜV type-tested to PED & EN4126-5.