When we are using the diaphragm valve and butterfly valve, will find that they are very easy to be damaged. So we should take some protective measures as follows.
How to maintain diaphragm valves?
Do not use long levers or long wrench wrenches when closing or opening the valve.
Stem thread often with the stem nut friction, should be at the screw to maintain a certain amount of oil, from the role of lubrication, to ensure the free movement of the stem. The valve is not always opened and closed, to regularly turn the hand wheel, add a lubricant on the stem thread to prevent the bite.
Long-term open the sanitary diaphragm valve, the sealing surface may be sticky dirt; the valve can be first gently closed, then open a little, so you can use the high-speed flow of media will be washed away dirt, and then close.
Installed in the outdoor sanitary diaphragm valve, to protect the stem set on the protection of its to prevent rain, snow, dust rust.
We should always clean and inspect the valve, in order to maintain the valve parts clean and complete. Do not place heavy objects on the valve, but should not stand on the valve.
Open the steam sanitary diaphragm valve, you must first rule out the system of condensate, and then slowly open the valve to avoid soft drinks impact; when the valve is fully open, the hand wheel should be reversed a little.
Spare valves should be placed indoors in the dry place, sealed with wax cardboard or plug the interface, so as not to enter the dirt.
How to maintain butterfly valves?
Electric hard seal butterfly valve on the welding of the bolts should not be too long, otherwise it will be because the bolt is too long and against the valve body flow channel, causing the sealing surface is “overhead”, can not play the role of sealing; we should pay attention to check and adjust the screw opening when assembly, ensure that the sealing surface can be tightly bonded. Select the appropriate adjustment pad, cushion thickness should be slightly less than or equal to the valve plate sealing surface height, so that the soft gasket sealing surface and the valve plate close fit, in the same plane.
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