Steam Converting Safety Valve (DUSI Type 700)
Internal motive steam extraction and supply to the motive steam head
Solid valve spindle design
Optimized body design avoiding critical material accumulations
extended service life, especially under dynamic power plant operation
Low vibration and low noise design
Validated via in-house CFD simulations
Hydraulic Actuator made by Welland.
Fewer interfaces, a fully coordinated valve and actuator system. A single-source solution.
Robust yoke
High turndown ratio
No thermal shocks in the outlet line
- by avoiding water separation
- through centralized flow routing of the water/steam mixture at the external motive steam head
- Drip-tight design
- No evaporation due to an individually preloaded spring in the motive steam head
Single-stage control achieved by a control piston in combination with throttle cylinders; number of stages customizable based on requirements/application
Minimal maintenance effort
All wear parts replaceable on site. Bolted internal parts - not welded!
Optimum steam converting across the entire load range via an external motive steam nozzle
- Outlet temperature close to the saturation line
- High water/steam ratio achievable
- Short mixing distances
- Immediate cooling of minimal steam volumes
