Metal Sealed Butterfly Check Valve with Hydraulic Slow Closing

Release time:

2024-03-07

HBH747H hydraulic retarded metal sealing butterfly valve is the latest development and development of a new generation of retarded check valve with advanced technology in our company. It is widely used in metallurgy, hydropower, thermoelectric, thermal, petrochemical, water conservancy, municipal and other industries. It adopts an independent adjustable hydraulic damper retarding system. According to working conditions, pipeline and medium parameters of the valve. Hydraulic damper retarder is adjusted to the optimum position and installed in pump outlet and water supply and drainage pipeline to prevent medium backflow and water hammer impact. It can effectively protect the safety of machine, pump and pipeline. Characteristics and advantages

1. Set multiple functions of check, cut-off and elimination of water hammer in one valve. Reduce the cost of purchasing valves, high economy.

2. Automatically realize the action of quick closing and slow closing; fast closing without resistance, slow closing without water hammer. Guarantee the safety and reliability of the system.

3. Hydraulic damper retarder is an independent system, which can be adjusted according to working conditions, without oil pressure or power supply control, without maintenance, environmental protection and energy saving, and reduce operating costs.

4. The weight balance mechanism can also be adjusted to improve the ability of the valve to adapt to working conditions.

5. Slowly open the pump, after starting the pump, the inlet pressure of the valve reaches the predetermined value, the valve opens, which can reduce the starting current and ensure the safety of the motor and electric control system. When stopping the pump, it closes quickly and then slows down, effectively preventing water hammer.

6. The butterfly valve structure has the advantages of small volume, light weight, small space occupation and low cost of soil construction.

7. Three-dimensional eccentricity + large eccentricity seal structure, to achieve the opening seal is separated, closed contact is sealed, reduce seal wear, prolong service life.

8. Metal + graphite sandwich sealing ring, progressive sealing, tight and reliable sealing, and has the function of sediment prevention and pressure automatic compensation. Easy to replace and adjust, good sealing effect, wide application range.

9. Essential fire protection design, high safety.

10. It combines the characteristics of butterfly valve and check valve, and has a unique hydraulic retarding system with remarkable performance.

1. open valve

After starting the pump, the medium pressure in front of the valve rises to the set value, and the force acting on the valve plate slowly opens it to the full open position. The set value is related to the size of the hammer arm. When the valve is opened, the hydraulic oil in the cylinder flows through the one-way valve from the needle valve to avoid cylinder pressure holding and make the valve open flexibly. Make sure the valve plate does not open out of position.

2. close down

When the medium pressure in front of the valve suddenly decreases, the valve plate closes under the action of medium backflow and weight hammer.

The valve closing process is buffered by two stages: in the range of 90%~15', the hydraulic oil passes through the throttle rod hole to regulate the needle valve for fixed throttling and slow down the closing speed of the valve.

At this time, the valve is a fast closing process; when the valve is 15 ~ 0, the hydraulic oil flows to the needle valve through the throttle valve, and stepless regulation is carried out through the throttle plug on the throttle valve. At this time, the valve is a slow closing process, achieving the slow closing effect from the surface. The time of fast closing and slow closing can be adjusted according to the site, so that the valve is in the best working condition.

3. regulation

Adjusting needle valve on hydraulic cylinder can adjust the opening and closing speed and time of valve.

Adjusting the throttle valve on the hydraulic cylinder can adjust the slow closing speed and time of the valve stage.