Sewage valve installation method

Multi-pass drain valves must be installed vertically on horizontal pipes. The valve can only be installed after the pipe has been cleaned.

1. Turn the hand wheel valve stem counterclockwise to drive the valve core upward gradually, the sealing surface disengages, the flow guide seat on the valve core gradually moves out of the valve seat inner hole to form a narrow gap clearance, and the medium passes through the symmetrical orifice on the valve seat. Inside the valve seat, a small amount of medium can flow out through the slits, gradually reducing the system pressure.

2. Continue turning the hand wheel counterclockwise and the spool moves upwards. The throttle hole on the deflector seat moves out of the valve seat cavity. More fluid is discharged through the guide seat and the valve sleeve.

3. Continue turning the hand wheel counterclockwise and the spool moves upwards to the fully open position. At this point, the medium pressure is greatly reduced. A large amount of impurities can be directly discharged from the throttle hole of the valve sleeve, and a vortex is formed at the inverted seal seat. Clean the sealing surface to prevent impurities from adhering to the sealing surface.

4. Rotate the valve clockwise, the valve stem drives the valve core down, at this time the sewage has ended, the system pressure is low, the orifice area on the valve sleeve gradually decreases, the guide sleeve is close to the valve seat, and changes the medium flow, the medium After throttling, the valve and the valve are used as sealing surfaces at a certain speed to gradually strengthen the cleaning of the sealing surface.

5. Continue to rotate the handwheel. The flow guide seat on the valve plug enters the inner hole of the valve seat to form a narrow slit throttle. Since the draining is near the end, there is less impurity in the medium. The narrow gap between the guide sleeve and the valve seat prevents the remaining. The tiny impurities flow into the sealing surface, and the medium quickly flows out through the narrow gap, thoroughly cleaning the sealing surface, and ensuring zero leakage when the sealing pair contacts.

6. Continue turning the handwheel and the valve plug and seal seat are in contact. Sealed.

The sewage valve body and the valve cover are clamped and clamped. The structure is compact, easy to disassemble and easy to install. The branch pipe is welded. The sewage valve adopts the pressure self-tightening sealing structure. The sealing ring is made of the formed asbestos packing. The higher the medium pressure, the better the sealing performance. Diverter valve media from the branch into the sewage down, valve disc for the piston structure and boron treatment, corrosion resistance erosion resistance long life.