1. The multi-pass drain valve must be mounted vertically on a horizontal pipe. 2. Install the valve only after cleaning the pipe.

1. Turn the handwheel valve stem counterclockwise to drive the valve core to move up gradually, the sealing surface is disengaged, and the flow guiding seat on the valve core gradually moves out of the inner hole of the valve seat to form a narrow gap gap, and the medium passes through the symmetrical orifice on the valve seat. Inside the seat, a small amount of media can flow through the narrow slits, gradually reducing system pressure.

2. Continue to rotate the hand wheel counterclockwise, the valve core moves upward, and the throttle hole on the flow guiding seat moves out of the inner cavity of the valve seat, and more medium is smoothly discharged after being throttled by the flow guiding seat and the valve sleeve.

3. Continue to turn the handwheel counterclockwise, and the valve core moves up to the fully open position. At this time, the medium pressure is greatly reduced, a large amount of impurities can be directly discharged from the orifice of the valve sleeve, and a vortex is formed at the inverted sealing seat. Clean the sealing surface to prevent impurities from adhering to the sealing surface.

2 valve closing process:

4. Turn the valve clockwise, the valve stem drives the valve core to move down. At this time, the sewage discharge has ended, the system pressure is low, the orifice area on the valve sleeve is gradually reduced, the guide sleeve is close to the valve seat, and the medium flow direction is changed. After the throttling, the sealing surface is made through the valve core and the valve at a certain speed, and the cleaning force on the sealing surface is gradually strengthened.

5. Continue to turn the handwheel. The diversion seat on the valve core enters the inner hole of the valve seat to form a narrow slit. Since the discharge is nearing the end, the impurities in the medium are less, and the narrow gap between the guide sleeve and the valve seat prevents the residual. The tiny impurities flow into the sealing surface, and the medium flows out quickly through the narrow slit, thoroughly cleaning the sealing surface to ensure zero leakage when the sealing pair contacts.

6. Continue to turn the handwheel and the valve plug is in contact with the seal seat. Achieve sealing.

Drainage valve standard, sewage valve size, sewage valve function, sewage valve principle; sewage valve body and valve cover are clamped, the sewage valve is compact, the sewage valve is easy to disassemble, the sewage valve is easy to install, and the sewage valve branch is welded. . The drain valve adopts a pressure self-tightening sealing structure, and the drain valve sealing ring is made of the formed asbestos packing. The higher the medium pressure of the drain valve, the better the sealing performance. The drain valve medium flows from the branch pipe into the downward drain. The valve flap of the blowdown valve is a piston structure and is boronized. The sewage valve has long corrosion resistance and erosion resistance.

Control Valve

Control Valve,Flow Control Valve,Pressure Control Valve,Directional Control Valve

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