Zhejiang Haihua Automatic Control Valve Co., Ltd.
Forged steel gate valves often ignore pressure problems. In the grease injection operation, the grease-loaded regular semi-free float-type steam trap has a peak-to-valley change. The pressure is too low, the seal leaks or the safety valve fails, the pressure is too high, the grease port valve manufacturer is clogged, the seal grease hardens or the seal ring and the valve ball and the valve plate are locked. Usually, when the grease pressure is too low, the injected grease flows into the bottom of the valve chamber, which usually occurs in a small gate valve. On the one hand, the pressure of the grease flow control valve is too high. On the one hand, the grease valve is inspected to check the grease nozzle. If the grease remote control float valve hole is blocked, the spring seal is replaced with a wrench. The other plunger valve is a lipid. To harden, use a cleaning solution, repeatedly soften the failed sealing grease, and inject a new grease to replace it. In addition, the sealing type and sealing material also affect the grease filling pressure. Different sealing forms have different grease filling pressures. Generally, the hard sealing grease pressure is higher than the soft sealing.
Forged steel shut-off valves pay attention to the problem of the valve in the switch position. Ball valve maintenance is generally in the open position, in special circumstances, choose to turn off maintenance. Other valves cannot be discussed in terms of opening. Forged steel shut-off valves must be closed during maintenance to ensure that the grease fills the seal groove along the seal. If it is open, the seal grease will fall directly into the runner or valve cavity, causing waste. When the valve is greased, the problem of grease injection is often ignored. The pressure, grease injection amount and switch position are normal during the grease filling operation. However, in order to ensure the grease filling effect of the valve, it is sometimes necessary to open or close the valve to check the lubrication effect and confirm that the valve ball or the surface of the valve is evenly lubricated.
Forged steel check valves should pay attention to the problem of valve body discharge and wire plug pressure relief. After the valve pressure test, the gas and moisture in the valve chamber of the sealed chamber are boosted due to the increase of the ambient temperature. When the grease is injected, the drain and pressure should be drained first, so as to facilitate the smooth operation of the grease injection work. After the grease is applied, the air and moisture in the sealed chamber are sufficiently replaced. Timely discharge of the valve chamber pressure also ensures the safety of the valve. After the grease is applied, be sure to tighten the drain and pressure relief plug to prevent accidents. When filling grease, pay attention to the problem of uniform grease. In normal fat injection, the fat-producing hole closest to the grease injection port first comes out of fat, then to the low point, and finally to the high point, and the fat is successively produced. If it is not in accordance with the law or does not produce fat, it proves that there is clogging and clearing treatment in time.
Forging steel and long-end gate valves should observe the problem that the valve diameter and the seal ring are flush. For example, if there is a ball valve, if there is an open position, the position limiter can be adjusted inward to confirm that the path is straight and locked. Adjusting the limit can not only pursue the opening or closing of a position, but should be considered as a whole. If the opening position is flush and not closed, the valve will not be closed. In the same way, if the adjustment is in place, it is also necessary to consider the corresponding adjustment. Make sure the valve is at right angles. After the grease is applied, the grease injection port must be sealed. Avoid the entry of impurities, or the oxidation of lipids at the grease injection port. Apply anti-rust grease to the cover to avoid rust. So that it will be applied the next time.