Hydro Valve

The valve products provided for hydropower stations by our company include:

  1. Turbine Inlet spherical valve of water turbine
  2. Turbine Inlet Butterfly valve of water turbine
  3. Flow regulation valves

The valves of the hydropower station are mainly  installed on the water diversion pipe in front of water turbine in the hydropower station, mainly consisting of quick gate, penstock protection valve (or bulkhead gate), water inlet valve of the turbine, and the flow regulating valve. The valves of hydropower station are indispensable components for the safe operation and maintenance of the hydropower station.

 

1.Inlet Spherical valves

1.1 Specifications

  • Valve nominal diameter: DN500-DN3500
  • Nominal pressure PN25-PN120
  • Medium temperature: 0-65℃
  • Applicable medium Water

1.2 Purpose

  • If the unit cannot operate due to any fault, the flowing water shall be emergently closed to prevent the accident from expanding.
  • If the unit is closed for a long period, the upstream water shall be cut off to reduce the water leakage amount and wearing of the guide vanes and prevent the unit from moving. During overhaul of the unit, the upstream water shall be cut off to keep the water diversion pipe with full water, so as to ensure the unit can be quickly started.
  • When a main water delivery pipe is adopted to supply water for several units, and one of the units needs to be overhauled, it only needs to close the inlet valve of the unit, which will not affect the normal operation of other units.

1.3 Applicable working conditions

High water head and high-speed hydropower stations, pumped storage power stations

1.4 Introduction of products

Water inlet spherical valves include the upstream (downstream) connection pipe, hydraulic spherical valves, dismantling joint, bypass system, air valve, as well as hydraulic control system and electrical control system.

1.5 Features and advantages of products

  • The runner is smooth and the hydraulic loss is very small;
  • The spherical valve is tightly closed and the leakage is very small;
  • The overall welded spherical valve has a compact structure and excellent performance, which is more suitable for pumped storage power station;
  • Dual sealing is adopted for shaft end sealing, which has a good sealing effect and can prevent from sediment;
  • Self-lubricating bearings with strong bearing capacity, small friction coefficient and good wear resistance are adopted, which does not need maintenance;
  • Taking PLC as a core, the electric control system has high reliability and self-diagnosis function.

 

  1. Inlet butterfly valve:

2.1 Specifications

  • Valve nominal diameter: DN600-DN8000
  • Nominal pressure PN6-PN40
  • Medium temperature: 0-65℃
  • Applicable medium Water

2.2 Application

  • If the unit cannot operate due to any fault, the flowing water shall be emergently closed to prevent the accident expanding.
  • If the unit is closed for a long period, the upstream water shall be cut off to reduce the water leakage amount and wearing of the guide vanes and prevent the unit from moving. During overhaul of the unit, the upstream water shall be cut off to keep the water diversion pipe with full water, so as to ensure the unit can be quickly started.
  • When a main water delivery pipe is adopted to supply water for several units, and one of the units needs to be overhauled, it only needs to close the inlet valve of the unit, which will not affect the normal operation of other units.
  • It is installed in front of penstocks (adding anti-vacuum valve and other devices) as a protection valve for penstocks.

2.3 Applicable working conditions

Hydropower stations with lower water head.

2.4 Introduction of products

Water inlet butterfly valves include the upstream (downstream) connection pipe, hydraulic butterfly valves, dismantling joint, bypass system, air valve, as well as hydraulic control system and electrical control system.

2.5 Features and advantages of products

  • Butterfly valves are tightly closed;
  • Dual sealing is adopted for shaft end sealing, which has a good sealing effect and can prevent from sediment;
    Self-lubricating bearings with strong bearing capacity, small friction coefficient and good wear resistance are adopted, which does not need maintenance;
  • Taking PLC as a core, the electric control system has high reliability and self-diagnosis function;
  • Service valves can be replaced by dual seal butterfly valves, and the primary seal and shaft end seal can be overhauled online. (online shouldn’t be the correct term to use)
  1. Flow regulating valve

3.1 Specifications

  • Valve nominal diameter: DN200-DN2000
  • Nominal pressure PN6-PN25
  • Medium temperature: 0-65℃
  • Applicable medium Water

3.2 Application

  • Flow regulation;
  • Water supply by pressure and district;
  • Local pressure limited water distribution of pipe network.

3.3 Applicable working conditions

  • Flow regulation of water in taking from reservoir and gravity water delivery;
  • It is installed in the water inlet pipe of the pool pumping station in the pipe network, which is used for drainage pressure maintaining in the pool at night.
  • It can be used at the water supply valve and connection valve of water supply by pressure and district.
  • It can be used for local water distribution and pressure limit for large-scale pipe network.
  • It can be used as constant flow automatic regulating valve with a flow sensor or single loop controller.
  • It be used as branch pressure and water level controllers with a pressure sensor or water level controller.
  • It can be used in process cooling system and safety protection system of hydropower stations.

3.4 Introduction of products

It can drive the piston cylinder to move forward and backward, and regulate the open area of regulating valves through the electric actuator or hydraulic device drive and transmission mechanism to open and close or adjust the flow or pressure. Such types as ring spraying, cohesive and mesh can be widely used in the middle or end of the water delivery pipeline as a flow regulator or drain valve.

3.5 Features and advantages of products

  • It has good function and small cavitation coefficient;
  • with large flow regulation range, such valves can meet the practical application requirements of small water head loss with large flow and large resistance with small flow;
  • the operation is simple and convenient, and does not produce any blocking;
  • It can adapt to a wide range of medium and a strong drainage capacity.
  1. Penstock protection butterfly valves

4.1 Specifications

  • Valve nominal diameter: DN600-DN8000
  • Nominal pressure PN6-PN20
  • Medium temperature: 0-65℃
  • Applicable medium Water

4.2 Application

  • If the valve is installed at the downstream pressure regulating well, the power station equipment can be protected under emergency conditions.
  • If the unit is temporarily out of service or during maintenance, there is no need to close the inlet gate of water diversion pipe and it is just necessary to close the butterfly valve, by which, the water diversion pipe and pressure regulating well can be filled in the water to ensure that the unit can be started quickly.

4.3 Applicable working conditions

Penstock protection valve of the hydropower station.

4.4 Introduction of products

Penstock protection butterfly valves include upstream (downstream) connection pipe, hydraulic butterfly valves, dismantling joint, bypass system, anti-vacuum valve, over-speed measuring instruments, as well as hydraulic control system and electrical control system.

4.5 Features and advantages of products

  • Butterfly valves are tightly closed;
  • Dual sealing is adopted for shaft end sealing, which has a good sealing effect and can prevent from sediment;
  • Self-lubricating bearings with strong bearing capacity, small friction coefficient and good wear resistance are adopted, which does not need maintenance;
  • Taking PLC as a core, the electric control system has high reliability and self-diagnosis function;
  • The test is sensitive and the operation is safe and reliable.

 



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