How To Use The Operation Valve Of Howo Dump Truck Correctly

When the valve is fully opened, the handwheel should be reversed a little, so that the thread between the tight, so as not to loose damage. For open-stem valves, remember the stem position when fully open and fully closed to avoid hitting the upper dead center when fully open. And easy to check whether the full closure is normal. If the valve is off, or large debris is embedded between the spool seal, the position of the valve stem should be changed when the valve is fully closed. Damage to valve sealing surface or valve handwheel.

Valve opening mark: ball valve, butterfly valve, plug valve stem top groove and channel parallel, indicating that the valve in the full open position; When the stem is rotated 90 to the left or right, the groove is perpendicular to the channel, indicating that the valve is in the fully closed position.

Some ball valves, butterfly valves and plug valves are opened with a wrench and the channel is flat, and the vertical is closed. The operation of three-way and four-way valves should be carried out according to the marks of opening, closing and reversing. Remove the handle after operation.