Common failure reasons for the prevention and elimination method diaphragm valve diaphragm broken rubber, fluorine plastic diaphragm aging change regularly operating pressure ranks, crush the diaphragm to the small power operation, pay attention to the closing tag foreign body embedded in the diaphragm and seat asked, crushed or wear diaphragm operation is not to force, should be up and down repeatedly open and close a few times, wash away the foreign body, after formally locked valves; Membrane damage after timely change the height of the opening is too large, break down the diaphragm is unfavorable open too high when operation failure when opening the diaphragm and disc off not exorbitant, should be timely repair or replacement after shedding diaphragm valve stem and disc due to abrasion connecting pin fall off or break open when not allow more than top dead center, should be timely repair after shedding activity junction between stem nut and the Industrial Valves cover and stem wear and regular cleaning, stuck activity areas into graphite, mos2 powder coating lubrication; Fluorine membrane structure can be in activity place to add a small amount of grease plunger valve common failure reasons for the prevention and elimination method leak sealing surface body and plug seal face processing precision and the finish is not in conformity with the requirement to grinding the body and the plug cone sealing surface, until color inspection and testing qualified seal face mix of abrasive, bruises in the flush Industrial Valves sealing surface operation should be used when medium and seal wear particle on the surface of the dirt, such as the valve is fully open or close position, sealing surface should be scraped repair oil seal type oil plug or no oil gas should be regular inspection on time and communication and gas on time adjustment improper or loose parts damage; The pattern of gland nut loose; Packing type adjustment screw top dead plug; Sealing spring top tight force is too small or spring damage should properly adjust the plug valves to adjust parts, such as the rotating lightweight and seal leakage shall prevail; Tight compression nut loose after tighten, thread damage should be replaced; After packing type adjustment screw under the appropriate depth and tight, sealing spring tension force should be appropriate, damage should be replaced in a timely manner after sealing drainage holes was chocked up with dirt, lose the tight seal periodic inspection and cleaning performance, should not be used in sediment medium more stem rotation is not flexible sealing surface pressure tight: the pattern nut screwed tight, sealing of preloaded spring pressure tight appropriate adjust the sealing surface of clamping force. Appropriate relax tight pattern nuts and sealing preloaded spring sealing surface scratch repair regularly, oil seal oil gland type should be regularly pressure tight appropriate relax lubrication conditions deteriorate packing assembly, appropriate coating graphite, oil seal cock valve timing gas wrench a indelible to correct operation, wrench damage should be repaired
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