Product reference standards:

1. Technical manufacturing shall comply with the provisions of GB12237
2. Inspection and testing shall be conducted in accordance with the provisions of JB/T9092
3. The flange size shall be in accordance with the provisions of JB79
4. The structural length shall be in accordance with the provisions of GB12221

Product Structure Features:

The hydraulic water and electricity ball valve is mainly suitable for water with sediment as the medium and a temperature of -28~80 ℃ in hydropower stations. It can only be fully opened or closed on the water pipeline as an opening and closing device, and cannot be used for regulation. It has the advantages of low flow resistance, flexible opening and closing, safety and reliability, and easy operation.
Adopting a dual sealing ring piston water stop ring structure, it is divided into upstream maintenance seal and downstream working seal. Sealing rings are installed at the upstream and downstream sealing positions of the annular valve core, and the piston stop ring is pressed against it by the hydraulic system to achieve sealing. When the ball valve is normally closed, the downstream working seal is closed and the water stops smoothly. However, during maintenance or replacement of the downstream working seal, the upstream maintenance seal is closed and locked by a mechanical locking device.
The operating mechanism is a hydraulic operating mechanism (straight cylinder relay), which is a piston shift fork mechanism. It is equipped with a manual locking device, a main valve position signal indicator device, and a manual locking spindle input or output signal indicator device. The manual locking device can withstand the maximum operating pressure of the relay and avoid valve misoperation.
Position stroke switches are installed on the upstream and downstream sealing rings of the ball valve. After being connected to the central control room through a circuit, the status of the sealing ring can be accurately understood, so that the relay switch valve can be operated accurately.
The upstream of the hydraulic ball valve (main valve) is welded to the inlet pipe through a short pipe in front of the valve, and the downstream is connected to the turbine volute through an expansion joint for easy installation and maintenance of the hydraulic ball valve (main valve) and adjustment of the expansion joint.
The hydraulic ball valve (main valve) is equipped with a bypass production pipeline, which aims to balance the pressure at the upstream and downstream ends of the valve before opening the main valve, and reduce the opening and closing torque of the main valve. The bypass valve is a hydraulic ball valve, and a manual valve is installed in front of the hydraulic ball valve for maintenance of the bypass hydraulic ball valve.
A DN80 wedge gate valve is installed at the top of the expansion joint. When the pressure steel pipe is filled with water to the downstream turbine, the valve is fully opened to remove the air on the water surface. DN80mm and PN4.0MPa manual gate valves are installed at the bottom of the ball valve and the expansion joint, which are used to fully remove dirt from the valve chamber and accumulated water in the snail shell during maintenance of water turbines and other equipment.
Two throttle valves are installed at the two inlet ports of the relay switch, allowing the opening and closing time of the valves to be adjusted according to customer requirements.

GFQP9k47F/H Water and Electricity Special Ball Valve