In order to prevent the thermal shock of cold water supply and improve the efficiency of the unit, the heater will be heated before the water is used in the economizer part of the boiler.
For example, by improving the feed temperature 10 ℃, the unit efficiency increased by 1%.
This is achieved by pumping air from high, medium and low pressure turbines.
The condensate of each heater has a considerable amount of energy used to heat water for heat exchange.
Valves are recommended for hydrophobic systems
High (low) heater steam trap
Pneumatic drain ball valve Model 2317
Pneumatic hydrophobic Y type globe valve Model GLPD
Pneumatic hydrophobic critical gate valve Model GAPD

The heater trap valve
The most common heater layout in power plant is the cascade arrangement.
This will depend on the very close saturation condition of the heating water.
The condensed water formed during the heating process is still in the saturated state and then sent to the next stage heater.
The liquid level control valve is used to maintain the liquid level of the heater, and the condensing water is arranged to the flash tank, which will improve the efficiency of the heat exchange.
1-130603142020291 JPG
A power plant usually has two sets of feed water heaters.
The low pressure heater adopts the pumping air of the low pressure steam turbine, and its position is located behind the condenser pump.
Condensate enters an open heater through a low-pressure heater, or deaerator, which will remove the gases that corrode the pipe and related equipment at high temperature.
The deaerator provides the suction end of the main boiler to the pump, while the water pump passes through a series of high pressure heaters prior to the economizer, and its steam comes from the exhaust gas from the high and intermediate pressure turbines.

Each heater needs to pay special attention to two valves. This is the normal heater trap and emergency steam trap.
These two valves can greatly influence the efficiency of the unit.
Research shows that many heater hydrophobic control systems are poor and can save factory costs.
This is directly related to heater level control, is the function of normal heater trap.

The normal heater trap is used to control the condensate level of the heater and the condensate flow to the next continuous heater.
As mentioned above, the condensate is in a saturated state, and when the condensate passes through the valve, the condensate flash evaporates into steam to help heat transfer.
Flash vaporization of high velocity and carrying water droplets can cause serious erosion.

The emergency heater hydrophobic has a similar effect on the efficiency of the unit.
This valve is only used for high level alarm, so tight shutoff is necessary to ensure proper performance.
The leakage of the hot river condensate on the valve will go straight into the condenser, which will require additional pumping to provide heating.
As the export flow enters the condenser directly, the valve operation will also be flashing.


Lock slag product. JPG tyco hydrophobic ball valve consists of trunnion mounted (seat) and float type ball valve products comply with a variety of standard and heavy duty applications, provides a close two-way cut-off operation ability.

Design features

• full diameter or reduction design
• through fire safety and antistatic safety certification
• blowout stem design
• flexible, metal/flexible metal/metal seating
• manual or actually-driven actions





1-130624112 u4y7. JPG tyco series pneumatic drain valve is suitable for high and hydrophobic and superheater and reheater hydrophobic hydrophobic system ShuFang water, such as closing and discharge valve sealing requirement is high, can quick opening quickly closed, and has the function of fault protection, automatic control functions and high reliability.
Therefore, the series globe valve (commonly known as steam trap, hydrophobic valve) is 1-130624112u4y7. JPG is the preferred product for this type of system.
Pneumatic control valve sealing pressure lasting stability, debugging is simple, low maintenance requirements, low failure, high reliability, automatic protection, loss of gas electricity quick opening and closing, the price is relatively cheap, energy conservation, environmental protection, and is suitable for the power plant ShuFang water condition.
Power station steam turbine's high pressure cylinder exhaust channel or other to 1-130624112 u4y7. JPG rapidly closing industrial piping system, the air pressure (0.5 ~ 0.7 Mpa) or under the influence of the return spring quickly shut down (closing time of 0.5 s or less), steam turbine and other devices to prevent the backflow medium damage.
1-130624112 u4y7. JPG
The pneumatic control globe valves are generally full open.

Design features

The trip is short.
The speed is fast.
Reliable sealing.
The static torque is small.


Due to its excellent cutting performance, the tyke series of emergency hydrophobic sluice valves are widely used in the field of fire and hydrophobic water.
1-130 f1150313146. JPG



Technical parameters

1. The actuator of pneumatic gate valve has positive and anti-two functions,
Therefore, the way of opening and closing of valves can be operated in two ways.
The gate valve adopts the unique structure of metal contact, reliable operation and high cutting performance.
Superior to conventional cut-off valves.
Allow the leakage to reach 10-8 x KV.
Using range is wide, - 196 ℃ to 500 ℃, the temperature can be
Small caliber to 40 mm to 600 mm. The seat has a parallel type of incision and 90 °, 60 ° V V
There are three types of incisions, suitable for different use occasions.

2. The valve body can be insulated with clamping form.