Daily valve maintenance
How much do you know? Qingdao air pipe head of the small series to introduce you.
1, the valve should be kept dry indoor ventilation, access to the ends of the passage must be blocked.
2, long-term storage of the valve should be regularly checked, remove dirt, and in the processing of oil coated with rust.
3, after the installation, should be regularly checked, the main inspection items:
(1) sealing surface abrasion.
(2) the wear of trapezoidal thread of the valve stem and valve stem nut.
Maintenance work of valve grease injection
In pre production welding before and after the commissioning of the valves professional conservation work, services for the valve in the production and operation plays a crucial role, correctly and orderly and effective maintenance will protect the valve, the valve to function normally and prolong the service life of the valve. Valve maintenance work seems simple, in fact, otherwise. There are often overlooked aspects of work..
First, the valve grease, often ignoring the problem of fat injection. After the injection of grease gun, the operator chooses the valve and the injection fat to connect the way, then carries on the grease injection operation.. There are two situations: on the one hand, the amount of fat injection is less, the sealing surface is accelerated by lack of lubricant.. On the other hand, excessive injection of fat, resulting in waste. Is not based on the type of valve, the valve sealing capacity for accurate calculation. Can be the valve size and classification of the sealing capacity, and then reasonable to inject the right amount of grease.
Second, the valve grease, often ignore the pressure problem. In the grease injection, the pressure of injection has a regular variation of the peak and the valley.. Pressure is too low, seal leakage or failure, the pressure was too high, the grease port plug, sealed within the lipid hardening or sealing ring and the ball valve, valve plate locking. Usually when the grease pressure is too low, the injection of grease into the valve chamber bottom, generally occurs in small valve. The grease injection pressure is too high, on the one hand, fat injection nozzle check, pore blocking fat replacement to ascertain the situation; on the other hand is the lipid hardening, to use the cleaning fluid, repeated failure to soften the sealing grease and injected new grease replacement. In addition, the seal type and seal material, also affect the injection pressure, different sealing forms have different grease injection pressure, general situation hard seal grease injection pressure than soft seal.
Third, the valve grease, pay attention to the valve in the switch position problem. Valve maintenance is generally in the open position, special circumstances choose to close the maintenance. Other valves can not be punished in order to open spaces. Valve in the maintenance of the must be in the closed state, to ensure that the grease seal groove along the sealing groove, if open, sealing grease directly into the flow or valve chamber, causing waste.
Fourth, the valve grease, often ignore the effect of injection fat problem. The pressure, injection fat amount and switch position in the grease operation are normal. However, to ensure that the valve grease effect, and sometimes need to open or close the valve, the lubrication effect to check, confirm the valve ball or gate surface lubrication uniform.
Fifth, the grease, should pay attention to the problem of pressure relief valve and a plug of sewage. Valve pressure test, the chamber gas and water pressure due to the ambient temperature rise and boost, the injection of grease when the first sewage discharge pressure, in favor of the smooth operation of the grease injection. The air and moisture in the sealed chamber after the grease injection are fully displaced.. Timely relief valve chamber pressure, but also to protect the use of safety valve. After greasing, must tighten drainage and relief plug, to prevent the accident.
Sixth, the grease, to pay attention to the problem of fat evenly. When the normal injection fat, the nearest grease hole fat hole first out fat, then to the low, finally is the high point, successive grease. If you do not follow the rules or no fat, prove the existence of plug, clean through timely treatment.
Seventh, note grease also observe the valve diameter and sealing ring block flush problem. Such as ball valve, if there is a surplus, can be adjusted to the open position limit device, confirmed that the diameter flat lock. Adjust the limit can not only pursue the position of the open or closed, to the overall consideration. If you open a flat, the door is not in place, will cause the valve is not strict. Similarly, adjust the position, but also to consider the opening corresponding adjustment. To ensure that the valve at a right angle stroke.
