- Fully machined forged valve
- Allows controlled start-up and shut-down of different loops in the power plant with a minimum of heat losses
- Resistant against thermal stress and requires no additional preheating above the demand for superheated steam in the inlet
- Cage plug for flow control that results in a protected seat area and high range ability – 50:1 or more Pressure reducing pipes in outlet to create a multistep pressure reduction providing for minimum noise and vibrations
- Special seal bonnet to guarantee tightness and easy maintenance
- Bolted bonnet also used for low pressure class
The BTG valve type VLR has been designed as a pressure reducing valve for high pressure and/or low pressure systems where a steam conditioning valve is not applicable.
The Kv/Cv-value of the valve depends on the pressure ratio p1/p2 and must – for each valve – be calculated in the BTG computer program, where all throttling points in the valve are taken into consideration. Certified dimensional drawing will be supplied by CCI.
Main applications – high pressure system
- Pressure control/turbine bypass.
- Controlled pressure build-up in the boiler.
- Protection against exceeding the design pressure. Note!
Main applications – low pressure system
- Controlled pressure build-up in the reheater.
- Pressure control/bypass of the intermediate and low pressure part of the turbine. This will assist in avoiding release of the safety valves and consequently helps to prevent large condensate losses.
- Protection of the condenser in case of disturbances.
- Turbine extraction control
- Controlled pressure in steam pipes to the process – in parallel with the back pressure turbine.
- Provides the process with steam flow during start-up of the turbine.
- Fast take-over of the whole steam flow from boiler to process when the turbine stops/trips.
