Combination ball valves can be customized
The operation of manual valves
by：AIRWOLF
2021-01-15
Manual valve is equipment and devices used on common a valve, it is through the handle, hand wheel to operate.
Normally handle, hand wheel, chronological thorium rotation rules for closing direction, counterclockwise regulation for the open direction.
But some valve open-close direction contrary to the above, so before the operation should pay attention to check the opening and closing again after operation.
1. The handle of the valve, the handwheel size was designed according to human switch valve. Therefore, in the valve using rules: do not allow the operator leveraged and long wrench valve opening and closing. Prevent damage of overexert, sealing face and other parts. Second, hand wheel, handle damaged or lost, should be timely to match neat, do not allow the use of a wrench substitute.
2. Gate and globe valves, such as closed or open end ( The bottom dead center or the top dead center) To turn 1/4 to 1/2 turn, make the thread a better seal, with favorable operation inspection, so as to avoid twist too tight to damage the valve.
3. Of large diameter butterfly valve, gate valve and globe valve, some have a by-pass valve. The role of the by-pass valve is balanced differential pressure of imports and exports, reduce the open torque. When open, should first open the bypass valve, and then open the valve; To close the valve, should be closed bypass valve, then close the main valve slowly.
4. Can't do the gate valve, globe valve throttle, such easy to flush valve plate and the sealing surface, and the introduction of vibration leakage, damage to the valve.
5. Must first be preheat pipelines, before open the steam valve to discharge the condensate. Opens slowly, to prevent water hammer phenomenon. Damaging the valve and pipe.
6. After some manual valve in the closed, temperature drop, valve contraction, make the sealing surface produces tiny cracks and leakage. This should be shut down, at the appropriate time to close again.
7. New installation of pipeline and equipment, the facial dirt and welding design more. Normally open easily with manual valve sealing surface dirt, by the method of micro driving, let high-speed medium washed away the foreign body, gently closed again.
1. The handle of the valve, the handwheel size was designed according to human switch valve. Therefore, in the valve using rules: do not allow the operator leveraged and long wrench valve opening and closing. Prevent damage of overexert, sealing face and other parts. Second, hand wheel, handle damaged or lost, should be timely to match neat, do not allow the use of a wrench substitute.
2. Gate and globe valves, such as closed or open end ( The bottom dead center or the top dead center) To turn 1/4 to 1/2 turn, make the thread a better seal, with favorable operation inspection, so as to avoid twist too tight to damage the valve.
3. Of large diameter butterfly valve, gate valve and globe valve, some have a by-pass valve. The role of the by-pass valve is balanced differential pressure of imports and exports, reduce the open torque. When open, should first open the bypass valve, and then open the valve; To close the valve, should be closed bypass valve, then close the main valve slowly.
4. Can't do the gate valve, globe valve throttle, such easy to flush valve plate and the sealing surface, and the introduction of vibration leakage, damage to the valve.
5. Must first be preheat pipelines, before open the steam valve to discharge the condensate. Opens slowly, to prevent water hammer phenomenon. Damaging the valve and pipe.
6. After some manual valve in the closed, temperature drop, valve contraction, make the sealing surface produces tiny cracks and leakage. This should be shut down, at the appropriate time to close again.
7. New installation of pipeline and equipment, the facial dirt and welding design more. Normally open easily with manual valve sealing surface dirt, by the method of micro driving, let high-speed medium washed away the foreign body, gently closed again.
Custom message
Related Products
