STEAM DESUPERHEATING CONTROL VALVE TYPE DSV
The Steam Desuperheating Valve type DSV was developed as a Turbine Bypass Valve to be used in
conventional thermal power plants, however, especially for modern combined cycle power plants where daily startup and shutdown routines set the highest demands to material and construction.
In Bypass Mode, within seconds after switchover, live steam isn’t led to the turbine anymore but to the cold re-heater or condenser instead, depending on plant concept. As startup, the Bypass Station also bypasses the steam turbine until switching parameters are met. The steam coming out of the LP Bypass Station is led
directly to the condenser.
PED certificate
ISO Certificate
TYPE SPV
SPRAY WATER INJECTION VALVE Size I, II and III
Application Range
The main function of injection valves in this series is to control the flow of injection water to the connected fittings and / or coolers.
The injection water serves as a hot-steam temperature control. The injection valves are available with single or multistage trims to ensure optimal performance for each case. This type of valve can also be used for other media and functions, such as control valve, stop valve or drain valve.
IP/LP Bypass Valve
IP/LP Bypass valve are utilized primarily to dump the turbine steam in case of trip to the condenser of the power plant. The valve reduces pressure and temperature of IP/LP Stage steam from turbine to conditions suitable for proper operation of the condenser. Because of the increased specific volume of the steam these valves are larger in size compared to HP Bypass valves. While the number of pressure reducing stages is less, the amount of injected water becomes much higher compared with HP Bypass.
Designs to suit customers pipe connection and orientation.
Sizes available from 6” Inlet in A216 WCB, WC6 and WC9 Material or equivalent forged materials up to F91.
Bolted bonnet construction for ease of maintenance. Pressure sealed bonnet construction on request.
Installation in any orientation i.e. Horizontal or Vertical is possible.
Leak Tightness to ANSI/FCI-70-2 Class VI.
Turn Down of 1:100 depending on process data.
Low Pressure Difference between spray water and steam.
Spray water of temperature as low as 50 °C accepted.
Designed to prevent any thermal shock to valve body andinternals when the valve opens quickly after remaining closed for long time.
Short mixing and evaporation length required downstream of the valve.
Combination of Stop and Bypass Valve can be offered on request.
Outlet Temperature Control near to saturation point.
Pneumatic Valve Actuators (PD Series)
Pneumatic Piston Actuators are commonly offered with Turbine Bypass Valves for operating the valves. GS valves are designed with unbalanced trim to achieve tight shut off in closed position.
GS valve pneumatic actuators are offered in Single or Double acting type and the speed for opening or closing is increased by use of Quick
Exhaust valves and/or Volume Boosters. An accumulator vessel can also be supplied by GS valve along with the actuators. These
accumulators serve as reservoirs to enable the actuator perform a full operation stroke in the event of plant air failure in order to achieve the safe position. These actuators are available in sizes up to 800mm with Side or Top Mounted Handhweel arrangement with reduction Gear or a hydraulic Hand Pump on request for high operation forces.
Hydraulic Actuators(HPU)
For applications where operating forces are extremely high, Hydraulic Actuators and actuation systems are preferred and can also be
offered as well.
- Actuation Forces are extremely high.
Highest accuracy of Position Control is required.The Short Stroke time and quick function (1-2 Sec.) is needed.
Hydraulic Systems are skid mounted inbuilt with Pump (with 100% redundancy), filtration system, Accumulator, Emergency Hand Pump, Hydraulic Fluid Temperature Control System, Control Panel with PLC Instrumentation with DCS Interface and so on. For extreme ambient site conditions the HPU unit is completely closed, while the electric cabinet is air conditioned.
G S 汽 机 旁 路 的 设 计 专 利 证 书 — 蒸 汽 辅 助 雾 化 系 统
售 后 服 务
1.分析故障原因
2.薄弱部件分析
3.现场增值安装服务
4.试运行
5.故障排除
6.提供原装备件
7.阀门维修、改造服务
GS valve is in strict accordance with ISO9001: 2000, DIN, ASME, API and other standards to implement product development strategy. According to different needs of users, provide the most complete, most economical solution of fluid control valves and the most suitable product for worldwide users.
GS valve sets its general headquarters in the Oberhausen of Germany Ruhr industrial zone. During early phase after establishment, GS valve mainly provides the special valve for the world famous main equipment manufacturers, Alstom, Ansaldo, Mitsubishi, Stein-Muller, Babcock, etc.GS valve could provide the most improved and beneficial solution program of fluid control and the most functional valve.
GS valve is the main manufacturer of the European turbine bypass
system, (decompression device), high-temperature feeding water
system and control valve relying on the improved system of exploitation, design, production, assembly, quality control and after-sales service. We also participate in the construction of several significant projects, such as electricity, petrochemical, refinery, metallurgy, papermaking and many other industries.
The global development strategy of GS valve could contribute more comfortable services to the clients including providing the technical support, the technical training, after-sales service and delivering spare parts of the original factory. The professional technical worker of GS valve who accepted the strict training shall provide the local one-stop service for you.
TURBINE BYPASS SYSTEM
With the ever reducing reservoirs of Fossil Fuels, plants are
increasingly demanding valves and Systems that provide them with flexibility of operation and steam at the desired Pressure and Temperature in one single unit.
The requirements of a modern bypass system include Prevention of excessive boiler pressure fluctuations in the event of turbine trip or load rejection.
Avoidance of use of Spring Loaded HP Safety Valves and the losses associated.
With lifting of the Valve avoid losing valuable steam and boiler Quality medium in the event of turbine trip.
Controlled pressure build-up during turbine start- up or following a turbine trip.
Partial bypass to maintain steady upstream pressure when the turbine runs back to reduced load.
Partial bypass to maintain steady upstream pressure when the
turbine runs back to reduced load.
GS valve Engineers have been designing high pressure and high temperature Valves for over 20 years now based on the U.S. patent nr 6,131,612 and the original German Patent of former ZIKESCH.
Actuation method is carefully selected to meet the different operating demands and failure modes. Actuation system selected is either Pneumatic or Hydraulic depending on the speed, accuracy and sealing force required to achieve a tight shut off in closed position and a quick and reliable operation when opening the valve. However, an electric actuator can also be applied.
HP Bypass Valves (Series DSV)
Key Features
Designs are tailor-made to suit customers’ pipe connection, orientation and pipe materials.
Materials available for Inlet are A182 F11, F22 and F91.
Forged body design up to #4500 with intermediate ratings available.
Bolted or Pressure sealed bonnet construction.
Installation with horizontal or vertical stem orientation.
Leak Tightness to ANSI/FCI-70-2 Class VI.
Turn Down of 1:100 depending on data.
Low Pressure Difference between spray water and steam.
Designed to prevent any thermal shock to valve body and internals when the valve opens quickly after remaining closed for a long time.
Short mixing and evaporation length required downstream of the valve.
Outlet Temperature Control near to saturation point.
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