Teach you how to extend the service life of safety valve

The safety valve is a kind of safety protection valve. Its opening and closing parts are normally closed under the action of external force. When the medium pressure in the equipment or pipeline rises, the medium is discharged outside the system to prevent the medium pressure in the pipeline or equipment from exceeding the regulation. Numerical value. The safety valve is an automatic valve, which is mainly used in boilers, pressure vessels and pipelines. The control pressure does not exceed the specified value and plays an important role in personal safety and equipment operation. Therefore, in order to ensure the safety of use, the safety valve must be subject to standardized inspection and verification each year to ensure that the safety valve safety device and equipment are in a good state, to avoid safety accidents, and to protect the personal safety of the employees and the company’s assets. loss.

In the valve design or use experience, the lifting valve packing is mostly asbestos packing or graphite packing or polytetrafluoroethylene V packing, but these kinds of packing are limited by the number of valve opening and closing, that is, with the number of valve opening and closing Increase, filler will wear, the gap gradually increased, to a certain number (according to statistics will not exceed 2000) The valve will leak from the packing. After the leakage, it is necessary to repress the packing gland. This scheme is suitable for occasions where the number of valve opening and closing is small.

One approach is to use hydraulic and pneumatic sealing technology to change the original valve design concept. Use oil cylinder seal slip ring at the packing to increase the type 0 seal ring (Friction and seal specific pressure need to be calculated to determine the slip ring and type 0. Number of seals). By using this method, it can achieve up to 2 million times of opening and closing without leaking, but the type 0 sealing ring needs to be aged, and the use time is only 5 years. At the same time, the cost is high.

Another method is to add a washer under the packing and add a spring under the washer (the preload of the spring needs to be calculated). When the packing wears, the packing will be pressed back and sealed because of the spring. This method is currently used to test, can only be opened and closed 50-100 million times without leaking, requiring the user to re-compacting the packing gland during the annual overhaul, can only reduce the usual maintenance.

Is there any understanding of the service life of the safety valve?

Circlips For Holes

Circlips for holes are a type of fastening device used to securely hold an object in place within a hole or shaft. They are typically constructed from metal, such as steel or brass, and feature two semi-circular pieces connected by a spring. Once installed, the parts expand outward to securely hold the object in place. Circlips for holes come in many sizes and can be used to secure objects in a variety of applications, such as machinery, furniture, and automotive components.

Circlips for holes, also known as retaining rings or snap rings, are small metal rings that are used to secure components onto shafts or inside bores. They are typically installed in grooves or recesses on the shaft or inside the bore, and provide a retaining mechanism to prevent the component from sliding off or coming out of the hole.

Circlips for holes come in various designs, including internal and external types. Internal circlips are installed inside a bore or hole, while external circlips are installed on the outside of a shaft or component. They are often used in applications where a traditional nut and bolt or other fastening method may not be feasible or practical.

Circlips for holes are commonly used in automotive, aerospace, and machinery industries, as well as in various household appliances and equipment. They provide a cost-effective and efficient way to secure components in place, while allowing for easy assembly, disassembly, and maintenance.

Circlips For Holes,Shaft Retaining Clip Snap Ring,Metal Snap Ring,Retainer Clip Ring

Taizhou Wanluo Hardware Products Co., Ltd. , https://www.wlhardware.com