Valve maintenance and management valve electric device hard currency, must collect!

Valve maintenance and management valve electric device hard currency, must collect!

Maintenance of valve during transportation
Valve handwheel damage, stem bending, bracket fracture, flange sealing surface knock damage, especially the damage of gray cast iron valve, a considerable part of the valve transport process. The reasons for the above damage are mainly caused by the transportation personnel not knowing much about the basic knowledge of the valve and the brutal handling operation.
Before transporting the valve, prepare ropes, lifting equipment and transportation tools. Check the valve packaging, packaging damage should be repaired nail, can not be afraid of trouble, can not have fluke psychology; Packaging should meet the standard requirements, do not allow random rotation of the hand wheel has been packed sealed valve; The valve should be in a fully closed state. For the valve that has been opened by mistake, the sealing surface should be cleaned and then closed tightly, and the import and export channel should be closed. The transmission device shall be packed and transported separately from the valve.
When the valve is loaded and hoisted, the rope should be tied to the flange or bracket, never tied to the handwheel or valve stem. Valve lifting should be put gently, do not hit other things, placed to be stable. Position should be upright or oblique, valve stem up. To place the valve is not safe, the application of rope binding, or fixed with a pad block, so as not to collide with each other in transportation.
Manual loading and unloading valves, valves are not allowed to throw down from the car, nor is it allowed to throw from the ground to the car; Handling process should be orderly, sequential arrangement, stacking is strictly prohibited.
During valve transportation, take good care of the paint, nameplate and flange sealing surface. It is not allowed to drag the valve on the ground, and it is not allowed to move the sealing surface of the inlet and outlet of the valve.
If the valve is not installed at the construction site, do not open the package, it should be placed in a safe place, and make rain and dustproof work.
In the second quarter
Valve maintenance in storage
After the valve is transported into the warehouse, the custodian should handle the warehousing procedures in time, which is conducive to the inspection and storage of the valve. The custodian should carefully check the type and specification of the valve, check the quality of the appearance of the valve, and assist inspectors in the strength test and sealing test of the valve before storage. The valve that meets the acceptance standard can be put into storage; The unqualified should also be properly kept, to be dealt with by the relevant departments.
For the storage of the valve, to carefully wipe, clean the valve in the transportation process of water and dust dirt; Rust prone to processing surface, valve stem, sealing surface should be coated with a layer of anti-rust agent or affixed with a layer of anti-rust paper to protect; The inlet and outlet of the valve should be sealed with plastic cover or wax paper to prevent dirt from entering.
Inventory of valves should be consistent with the account, classification, neatly placed, clear labels, eye-catching and easy to recognize. Small valves should be in accordance with model specifications and size order, discharge on the shelf; Large valves can be discharged on the warehouse floor and placed in blocks according to model specifications. The valve should be placed in an upright or oblique position. The sealing face of the flange should not touch the ground, and stacking together is not allowed. For large valves and temporarily can not be stored in the valve, should also be placed in an upright position in the outdoor dry, ventilated place according to the category and size; Valve sealing surface should be oiled protection, channel should be sealed; On the stuffing box without stuffing, in order to prevent rain from entering the valve, should be coated with butter and other grease to close the stuffing box, and covered with linoleum or tarp, the best temporary warehouse shed to protect.
In order to keep the valve in good condition, in addition to the need for dry ventilation, clean dust-free warehouse, but also should have a set of advanced, scientific management system; For all the custody of the valve, should be regularly maintained and checked, generally from the date of leaving the factory, 18 months after the pressure test should be re-checked.
For valves that are not used for a long time, if asbestos packing is used, asbestos packing should be removed from the packing box to avoid electrochemical corrosion and damage to the stem. For unpacked valves, the manufacturer is generally equipped with spare packing, which should be properly kept by the custodian.
In the process of handling damaged, lost valve parts, such as handwheel, handle, ruler, etc., should be timely complete, can not be missing.
Antirust agents and lubricants that exceed the specified service life should be replaced or added periodically.
In the third quarter
Valve operation maintenance
The purpose of maintenance in the operation of the valve is to ensure that the valve is in a clean, well-lubricated, complete valve parts and normal operation state.