Forged steel valves often overlook the problem of fat volume. After the grease gun is refueled, the operator selects the valve for the low temperature cut-off valve and injects the grease and joins the way, and then injects the grease. Forged steel valves exist in two situations: on the one hand less fat less grease, sealing surface due to the lack of lubricant and wear faster. On the other hand excessive fat, resulting in waste. There is no exact calculation of the different valve seal capacities based on the type of valve. The valve size and type can be calculated seal capacity, and then a reasonable amount of grease into the appropriate. Forged steel gate valve often overlooked the pressure problem. In the grease injection operation, the grease injection pressure semi-free ball float steam trap law showed a valley change. Pressure is too low, the seal leak or safety valve failure, the pressure is too high, the grease valve manufacturers plug, seal the lipid hardened or seal ring and ball, valve plate lock. Usually grease injection pressure is too low, more grease into the valve cavity flow at the bottom, usually occurs in the small gate valve. The grease injection flow control valve pressure is too high, on the one hand check the temperature check valve check grease nozzle, as is the remote control of fat ball valve hole obstruction of the spring closed with a wrench fully open condition to be replaced; the other plunger stop valve on the one hand is lipid Hardened, to use cleaning fluid, repeated softening failure of sealing grease, and replaced with new grease. In addition, the sealing model and sealing material, but also affect the injection pressure, different sealing forms have different injection pressure, the general situation of hard sealing grease pressure is higher than the soft seal. Forged steel stop valve attention to the valve in the switch position. Ball valve maintenance are generally open position, under special circumstances choose to shut down maintenance. Other valves can not be the same place to open positions. The forged steel stop valve must be closed during maintenance to ensure that the grease fills the seal groove along the seal ring. If the seal is opened, the seal grease will fall into the runner or valve chamber directly, resulting in waste. Valve grease, often ignore the problem of grease injection effect. Fat injection operation pressure, fat injection, the switch position is normal. But in order to ensure that the valve grease, sometimes need to open or close the valve to check the lubrication effect, confirm the valve ball or gate surface lubrication uniform. Forged steel check valve to pay attention to the body of sewage and plugging pressure relief problems. After the valve pressure test, the gas and moisture in the valve chamber of the seal chamber are increased due to the increase of the ambient temperature. When the grease is injected, blowdown and pressure relief should be carried out first in order to facilitate the smooth operation of the grease injection. After the fat seal air and moisture within the cavity is fully replaced. Timely discharge the valve cavity pressure, but also protect the safety of the valve. After the end of grease, be sure to tighten the drain and drain wire plug to prevent accidents. Note fat, pay attention to the issue of fat evenly. Normal injection, the grease hole from the nearest fat first grease, and then to the low point, the last is high, one after another fat. If you do not follow the law or not fat, that there is congestion, timely clearance. Forged steel lengthened gate valve to observe the valve diameter and ring seat flush with the issue. For example, the ball valve, if there is an open position interference, you can adjust the open position limiter to confirm the diameter of the straight lock. Adjust the limit can not only pursue the open or closed position, to the overall consideration. If the opening flush, off is not in place, can cause the valve to be lax. Similarly, to adjust the position, but also consider opening the corresponding adjustment. Ensure that the valve's right-angle travel. After grease, must seal good grease mouth. Avoid impurities to enter, or lipid-lipid injection at the mouth, cover to smear rust-proof, to avoid rust. In order to apply the next operation. Forged steel cryogenic valves to be considered in the future delivery of oil in the specific treatment of specific issues. Given the different qualities of diesel and gasoline, the scouring and decomposition of gasoline should be considered. Valve operation in the future, encountered gasoline section operations, the timely replenishment of grease to prevent wear and tear occurs. Note fat, do not ignore the stem part of the grease. Valve shaft parts have sliding sleeve or packing, but also need to maintain the lubrication state, in order to reduce the frictional resistance during operation, such as can not ensure lubrication, the electric torque increases the wear parts, manual operation of the switch effort. Some ball valve body marked with an arrow, if there is no accompanying FIOW handwriting, seal seat is the direction of action, not as a medium flow reference, the valve from the vent in the opposite direction. Normally, two-seated ball valves have bidirectional flow. Forged steel valves are specifically classified as forged steel check valves, forged steel gate valves, forged steel ball valves, forged steel stop valves, forged steel check valves, self-sealing gate valves, self-sealing stop valves, self-sealing check valves, forged steel pins Valves, forged steel insulation valves, forged steel bellows valves.
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