Features Advantages

1. The valve adopts large eccentric and multiple eccentric structure, and the valve plate adopts butterfly disc structure, which is characterized by small flow resistance.

2. Using hydraulic damping device to make the valve disc produce slow closing, effectively preventing damage to the sealing vice.

3. The valve seat is designed to be tilted, with short closing stroke and time, completely avoiding the damage caused by water hammer to the pump.

4. The area of the flow path in the cavity of the valve body is larger than 40% of the area of the diameter, and there is almost no pressure drop after the medium passes through the valve plate, so the head loss is small. Compared with the general check valve, greatly reducing energy consumption.

5. tilted seat design, the entire opening and closing angle of 40 °, the stroke less than 1/2 of the rotary check valve. short opening and closing time, energy-saving effect is obvious.

6. With a unique lower (or upper) cylinder buffer mechanism, the valve plate closes in place 5 ° before the start of slow closure. Valve plate shaft rotation is more flexible, can save a lot of energy.

7. Unattended, no external signal control of the valve working mode. Hydraulic damping slow closing device is an independent system, can be adjusted according to the working conditions, without oil pressure or power supply, etc. to control it, without maintenance, environmental protection and energy saving, reduce operating costs

8. Skewed disc type three eccentric hard seal check valve is suitable for horizontal or vertical installation in pipeline.

Structural features 

       The utility model energy-saving inclined disc type three eccentric hard seal check valve adopts three eccentric structure, which is composed of several parts such as valve body, valve disc, valve shaft, valve seat and damping mechanism.

       The valve body is composed of two parts. Two parts of the valve body in the flange, valve disc, valve seat in the body of the valve tilt arrangement, and the center line of the valve body flow path at an angle of 55 °. Cavity runner surface area is greater than the valve body diameter area of 40%, the entire valve flow resistance coefficient is small.

       Valve seat and the center line of the flow path is a certain angle. Valve seat sealing surface is part of the oblique cone, the sealing line formed between the valve seat and the valve disc is a nearly elliptical curve, nearly elliptical sealing line is located in the plane and the center line of the valve runners at an angle of (α) of 55 degrees; nearly elliptical sealing line of the long axis of the center and the cone axis to form an angular eccentricity, i.e., the valve sealing surface of the valve seat is located in the cone of the axis and the valve center line of the runners form an angle of (β) is 10 ~ 15 °, the axis of the valve disc rotating axis relative to the axis of the cone is in an eccentric position, forming an eccentric amount (E1), and relative to the plane where the sealing line is also in an eccentric position, forming an eccentric amount (E2).

       The valve disc is a butterfly disc type valve, streamlined structure design. When the pressure of the medium reaches its working pressure, the valve disc opens automatically; when the pressure of the medium is reduced, the butterfly disc valve closes automatically.

       The valve shaft is a two-stage structure with self-lubricating sleeve, flexible rotation, opening and closing with less effort.

       The unique damping mechanism is mainly composed of cylinder, spring, buffer rod, piston and needle valve. When the valve disc is closed to the last 5°, the buffer rod allows the valve disc to close slowly, and the valve seat realizes a shock-free, collision-free and noiseless closing seal.