Thermal Power Valve

The valve products provided for thermal power stations by our company include:

  1. Electric vacuum butterfly valves of air cooling island
  2. Hydraulic-control slowly-closing butterfly check valves and electric butterfly valves at the pump outlet of circulating water system, electric butterfly valves at the contact wells, and various types of expansion joints.

All products above are designed and manufactured independently by our company, and our company owns the technical patents of these leading products, of which, the core technology and quality own leading advantages in the domestic industry.

 

1 Vacuum butterfly valve

1.1 Specifications

  • Nominal diameter:  DN 80-6000 mm
  • Nominal pressure:  PN 0.25, 0.6MPa
  • Applicable medium:  Non-corrosive saturated steam
  • Installation method:  Horizontal or vertical layout
  • Shell test pressure:  1.5 PN
  • Leak test pressure:  1.1 PN
  • Connection type with pipe: If DN≤800mm, the flange type is adopted in general . If DN>800mm, the welding type is adopted in general

1.2 Application

It is  installed in the pipe saturated steam system. When the air cooling unit is started in winter and operates under low load, the vacuum butterfly valve will be closed to isolate part of the air cooling units and increase the heat load of the operating unit, so as to avoid the tube bundle freezing and ensure the normal operation of the unit.

1.3 Applicable working conditions

It is installed in the pipe saturated steam system as connection and block valve of the steam medium.

1.4 Introduction of products

This butterfly valve is a leading product of our company, the design, manufacture and acceptance of which are in conformity to requirements of relevant national standards. The fundamental model of vacuum butterfly valves below DN4000 has been regulated and designed by series.

1.5 Features and advantages of products

Special combination seal design is adopted for the shaft end seal of butterfly valves to ensure the seal is reliable. The external seal seat of the valve is set with heat tapes, and other parts are filled with heat insulating materials to ensure such valves can be applicable to the working conditions of low temperature.

2 Hydraulic-control slowly-closing butterfly check valves

2.1 Specifications

  • Nominal diameter:  DN 500-4000 mm
  • Nominal pressure:  PN 0.6, 1.0, 1.6, 2.5MPa
  • Applicable medium:  Raw water, seawater, and demineralized water
  • Installation method:  Horizontal layout
  • Shell test pressure:  1.5 PN
  • Leak test pressure:  1.1 PN
  • Opening  time:  30-120 s
  • Closing  time:  Quickly-closing time:Adjustable in 3-30 s ,Adjustable in 3-30 s

Quickly-closing angle,65±10°

Slowly-closing time,Adjustable in 5-90 s

Slowly-closing angle,25±10°

2.2 Application

  1. It is installed at the outlet of the circulating water pump to prevent the back flow of the medium.
  2. It is controlled interlocking with the pump, and can be closed in two stages according to pre-adjusted procedures, which can effectively stop the pump-stopping water hammer.

2.3 Applicable working conditions

It is  installed at the outlet of circulating water pump at the thermal power station as block valve and slowly-closing check valve.

2.4 Introduction of products

It is a hydraulic-control slowly-closing butterfly check valve with two-stage valve closing features independently researched and developed by our company, which can be divided into energy storage tank type and heavy punch type according to the drive source to close the valves, and the national patent has been applied for such two types of products.

2.5 Features and advantages of products

It has dual-purpose applications of check valve and service valve.Dual exocentric rubber seal structure or triple eccentric metal hard seal structure is adopted for the primary seal; dual-compensative sediment resistant patent technology is adopted for the shaft end seal; the hydraulic system is safe and reliable, and PLC system has a high automatic degree.

3 Electric butterfly valves

3.1 Specifications

  • Nominal diameter:  DN 500-6000 mm
  • Nominal pressure:  PN 0.6, 1.0, 1.6, 2.5MPa
  • Applicable medium:  Raw water, seawater, and demineralized water
  • Installation method:  Horizontal or vertical layout
  • Shell test pressure:  1.5 PN
  • Leak test pressure:  1.1 PN
  • Opening  time:  30-240 s
  • Closing  time:  30-240 s

3.2 Application

It is  installed in the circulating water pipe system and condenser inlet and outlet as communication or cut-off medium.

3.3 Applicable working conditions

  1. It is installed at the front end of hydraulic-control slowly-closing butterfly check valves of circulating water pump outlet as service valve.
  2. It is installed in the contact wells of circulation water pipe as a switching valve between the pipes.
  3. It is installed at the condenser inlet and outlet as communication and block valve of the medium.

3.4 Introduction of products

The valves are the leading products of our company. The design, manufacture and acceptance of butterfly valves comply with the relevant national standards and relevant international standards.

3.5 Features and advantages of products

Advance software developed by internationally recognizable companies is adopted for auxiliary design and fluid analysis, CNC machine tools and other professional equipment are adopted in the key manufacturing processes, and the working conditions are simulated for product inspection and test.

 



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