Hand grinding technology for safety valves? Why do safety valves need to be ground

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

The safety valve is mainly ground by sealing surface grinding tools.

Due to impurities, or some strong impact, there are some friction scratches between the disc and the seat, which will affect the sealing performance, so these two parts should be ground and flattened to restore their sealing performance.

The spring safety valve is a device that limits the pressure cooker to exhaust the allergens early within the safe pressure range to ensure safe use. The structure and performance of the spring are the key to this valve. A spring-loaded safety valve is a device for the exhaust pipe that is blocked due to misoperation or uncleaning.

According to the ratio of the maximum height of the valve disc opening to the diameter of the flow channel of the safety valve, the safety valve can be divided into two types: spring micro-opening closed high-pressure safety valve and spring full-opening safety valve.

For beginners, there are large quantities of safety valves that need to be electrified. The operation is simple and convenient, and the efficiency is very high. A valve can be sharpened in a few minutes.

Non-electric is suitable for some places where electricity cannot be used. The efficiency will be a little slower, the requirements for personnel are higher, and long-term practice is required.

It is recommended to choose an electric one for beginners, which is easy to learn, does not require basic maintenance, and is fast and efficient. With a certain foundation, it is recommended that manual electric can be selected according to your needs.

The electric selection is professional. Save time and effort. Manual work is better, but it's too tiring. Please refer to Didi for details.

Grind with a special grinding tool.

Generally, 2000 is used for fine grinding, and if the scratches are more severe, you have to use about 280 for coarse grinding, and then fine grinding.

How much purpose abrasive is needed for a high-pressure safety valve.

The reason why the valve needs to be ground is that the valve leaks due to excessive wear, wear deviation and burning, and the valve must be carefully ground to replace the new valve or valve seat. The purpose of grinding valves is to enhance the sealing performance of the contact surfaces between the valves and the valve seats. To grind the valves, you need to prepare a grinding paste, clean diesel, valve adsorption leather handles, and preferably valve seat reamers.

As long as the cylinder head is flat, wipe the valve and valve seat, and then drop a little diesel fuel on the valve, if the diesel does not leak oil near the exhaust hole for about two minutes.

When using a grinder to grind the outer cylinder, the grinding sleeve must not be adjusted too tightly and must be adjusted with the right hand. Push the grinding sleeve to be stable, and if it feels too tight, adjust it loosely and don't push it hard.

The manual grinding of the valve can be done by "sanding twice at one time". First, clean the valve, its seat ring and duct, apply a little valve sand on the valve slope (first use coarse sand and then fine sand) and then insert the human duct, suck the valve head with the valve leather bowl, and use your fingers to turn the wooden handle for grinding (if there is a groove on the top of the valve, you can put a soft spring on the valve stem and rotate and grind it with a screwdriver embedded in the groove). During the grinding process, apply a little pressure to make the valve fit the seat and rotate it for about 1 4 turns, and then turn it 1 4 times after releasing the pressure from the seat surface.

In this way, the continuous reciprocating rotation and the frequent change of the relative position of the valve and the valve seat make each point on the working surface grind each other. To check the grinding quality, the child should first wash it with kerosene (dirty oil must not enter the human catheter), wipe it clean, install the valve with the valve hole, and pat it several times to check its contact surface. Grinding valves is not based on the length of time they are grinded, but on the degree of sealing.

The ground valve seal line is required to be in the middle of the valve cone surface, and the intake valve bandwidth is one: the exhaust valve is one 2mm, and its width is too large or too small will not be conducive to the sealing requirements. There should be linear contact between the valve surface and the seat ring, which can increase the contact pressure between the valve surface and the seat ring, which is conducive to sealing.

A taboo method is not right to grind the valve, you must use the valve suction to suck the valve, dip a small amount of valve grinding paste, while rotating, while patting, not only pay attention to the beat, but not rotate the valve. Second, too much abrasive paste should not be used, which will cause sand particles to enter the valve tube, causing wear of the valve and valve tube. If the grinding time is too long, the valve sealing belt will be too wide, and the air leakage will not be sealed.

Fourth, do not use abrasive paste for new valvesSome mechanics do not use abrasive paste when changing new valves and valve seats, but just insert the valve stem into the valve guide and tap it lightly.

The valves, valve seats and valve guides should be cleaned with gasoline before grinding, and the valves should be arranged in order or marked on the valve heads to avoid confusion. Then apply a thin layer of coarse abrasive sand on the working cone of the valve, and at the same time apply oil to the valve rod, insert it into the valve guide, and then use a screwdriver or rubber twist to reciprocate and rotate the valve and grind the valve seat, pay attention to the rotation angle should not be too large, and lift and rotate the valve from time to time, change the relative position of the valve and the valve seat, so as to ensure uniform grinding. In manual grinding, you should not use too much force, and do not lift the valve and slap it the valve seat, otherwise the valve working surface will be widened or ground into grooves.