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The daily maintenance and management of the valve
Jun 05, 2018

In order to make the factory run normally for a long time, regular maintenance and strict management of all equipment and devices must be carried out. Valves connect these devices and devices together.

Therefore, it is necessary to consider comprehensive maintenance and management issues. In order to prevent the accident from accidental interruption or interruption of the operation, the prevention and control of the accident will be avoided. The regular maintenance and inspection of the equipment and equipment in the production site of the continuous operation should pay a considerable amount of cost and manpower.

Maintenance of valve in transit

The failure of the hand wheel of the valve, the bending of the stem, the fracture of the support and the bump of the flange seal face, especially the damage of the gray iron valve, a considerable part of the valve is in the process of the valve transportation, which is caused by the basic common sense of the valve and the barbarous loading and unloading operation.

Before the valve is shipped, ropes, lifting equipment and conveyance should be prepared. Inspection of valve packaging, packaging damage should be repaired, can not be afraid of trouble, can not have a fluke psychological packaging to meet the standard requirements, not allowed to rotate the sealed valve handwheel valve casually in the closed state, to prevent mistaken opening of the valve, the close cover should be cleaned and closed tight, should be closed. Import and export channel. The transmission shall be packaged and transported separately or wholly according to the assembly conditions.

When the valve is lifted and hoisted, the rope should be attached to the flange or support, and must not be attached to the handwheel or stem. Valve lifting should be light and light, do not hit other objects, and place smoothly. Position should be upright or diagonal, stem upward. Unsafe valves should be placed in a rope or fastened with cushion so as not to collide with each other during transportation. When manually loading and unloading valves, the valve is not allowed to be thrown down from the car, and it is not allowed to move from the ground to the car. In valve transportation, we must protect 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 valve's import and export cover. Valves not installed at the construction site should not be disassembled. They should be placed in a safe place and be well protected against rain and dustproof.

Maintenance of valve in storage

After the valve is transported into the warehouse, the storekeeper should handle the warehousing procedures in time, which is beneficial to the inspection and storage of valves. The custodian should carefully check the size of the valve, check the appearance quality of the valve, and assist the inspector in the strength test and sealing test before the entry of the valve to the valve. The valve that meets the acceptance criteria can go through the formalities for warehousing, and should also be properly kept for the unqualified ones.

For the valve of the human library, we should carefully wipe and clean the water and dirt of the valve in the course of transportation, and protect the rust surface, stem and seal surface with a layer of rust proof agent or a layer of rust proof paper.

The valves in stock should be consistent with the items, orderly, clear, clear and easy to recognize. Small valves should be discharged on the shelf according to the size and size of the model. Large valves can be placed on the floor of the warehouse and placed in pieces according to the specifications and specifications. The valve should be placed upright, and the flange sealing surface must not be allowed to touch the ground, so that it is not allowed to be stacked together. For large and temporary valves, the valve should be placed in the outdoor dry and ventilated area in accordance with the type and size. The sealing surface of the valve should be covered with oil. The channel should be sealed without packing in the packing letter. In order to prevent the rainwater from entering the valve, it should be coated with butter, grease, sealing filler, and oil felt or rain. If the cloth is covered, it is better to take temporary shelter to protect it.

In order to keep the valve in a good state, in addition to the need to have dry ventilation, clean and dust-free warehouses, there should be a set of advanced and scientific management system for all the safekeeping valves, should be regular maintenance inspection, usually from the date of the factory, 18 months after the test should be re tested.

For long used valves, if the asbestos packing is used, the asbestos coil should be removed from the packing box so as not to produce electrochemical corrosion and damage the stem. For non stuffed valves, the manufacturer usually has spare packing, and the storekeeper should take good care of them. For non metal sealing materials, we should pay special attention to the aging period.

The damaged and missing valve parts, such as handwheels, handles, rulers and so on, should be put together in time.

The rust preventive and lubricants that exceed the prescribed period of use should be changed or added regularly according to the regulations.