Is the front test pressure of a soft seal double eccentric butterfly valve as large as the reverse t

Double eccentric butterfly valves are divided into forward and reverse.

The positive direction is the preferred direction for use, and the fluid pressure in this direction helps to seal the pressure of the fluid in this direction is greater than the reverse.

However, if the butterfly valve is required to have an end service requirement, then it must be so that both the forward and reverse sides meet the sealing requirements, that is, the pressure at both ends is the same.

The design is designed according to one side of the seal, so only the entrance can be tested according to the requirements, the reverse side can not be tested, the general inspection can take the front tightness test after passing the test, open the valve to do the overall strength test, check the gland and valve body leakage and strength.

This depends on whether it is a one-way seal or a two-way seal, if it is one-way, just try one side, if it is double-sided, both sides will try, and the test pressure should be equal.

The general sealing level of double eccentric butterfly valve is 1MPa (inner seal), and the outer seal is, of course, special can be improved.

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, Chaoda, 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.

This is the ingenuity of the valve design, its front is on the water inlet side, as long as the valve is closed by water pressure, the valve cover will be closed more tightly, if the valve is reversed water pressure will be squeezed from under the valve cover into the valve cover sealing cover, which is the cause of water leakage. So many valves have pros and cons. Hope to adopt.

Because ordinary eccentric butterfly valves are only one-way seals.

No, when calculating the specific pressure of the seal, the width of the sealing surface of the hard seal is a little smaller.

It's not the same. What butterfly valve do you need, you can contact me.

What you're talking about may be an eccentric butterfly valve.

Currently there are double eccentric and triple eccentric butterfly valves that can meet your requirements, as follows;

Butterfly valves with double eccentric PTFE structure seal and double eccentric rubber seal.

Triple eccentric PTFE structure butterfly valve.

The eccentric butterfly valve has the requirement of medium flow direction, when the pressure of the medium can be assisted in sealing when the butterfly valve is closed, we say that this flow direction is the positive direction of the valve.

Two-way isobaric sealing means that the forward and reverse pressure of the butterfly valve can achieve the same sealing requirements, and this pressure is related to the working pressure of the butterfly valve.

Industry standards are all stipulated.

It is OK to use the clamp-on middle line Qizhen rock lining rubber butterfly brigade valve, and the cost is relatively low.

Please refer to it quietly.

The structural differences between soft seal butterfly valve and hard seal butterfly valve are mainly as follows:

1. Structural differences: soft seal butterfly valves are mostly midline type hard seals, and most of them are single eccentric, double eccentric, and triple eccentric butterfly valves.

2. Temperature resistance: soft seal is used in room temperature environment. Hard seals can be used in low temperature, normal temperature, high temperature and other environments.

3. Pressure: soft seal low pressure-normal pressure, hard seal can also be used in medium and high pressure and other working conditions.

4. Sealing performance: soft seal and triple eccentric hard seal butterfly valve have good sealing performance, and triple eccentric butterfly valve can maintain good sealing in high pressure and high temperature environment.

In view of the above characteristics, the soft seal butterfly valve is suitable for two-way opening and closing and adjustment of ventilation and dust removal pipelines, water treatment, light industry, petroleum, chemical and other industries. Hard seal butterfly valves are mostly used in heating, gas supply, gas, oil, acid and alkali environments.

With the widespread use of butterfly valves, its characteristics of easy installation, convenient maintenance and simple structure are becoming more and more obvious. Electric soft seal butterfly valves, pneumatic soft seal butterfly valves, hard seal butterfly valves, etc. have begun to replace electric gate valves and globe valves on more and more occasions. Providence of Fande Valve Technology Shanghai.

Features of Soft Seal Butterfly Valve Small, lightweight, easy to disassemble and maintain, and can be installed in any position. The structure is simple, compact and 90 degrees open and close quickly. The operating torque is small, labor-saving and lightweight. The flow characteristics tend to be straight, and the regulation performance is good. The number of opening and closing tests is more than 10,000 times, and the service life is long. , to achieve complete sealing, gas test leakage is zero. , choose from different component materials, and can be suitable for a variety of media. Features of Hard Seal Butterfly Valve:

1) The unique design of three-way eccentricity [1] enables frictionless transmission between the sealing surfaces, which prolongs the service life of the valve.

2) Elastic seal is generated by torque.

3) The ingenious wedge-shaped design makes the valve have the function of automatic sealing that is tighter and tighter, and the sealing surface has compensation and zero leakage.

4) Small size, light weight, light operation and easy installation.

5) Pneumatic and electric devices can be configured according to user requirements to meet the needs of remote control and program control.

6) The material of the replacement parts can be applied to various media, and the lining can be anti-corrosion.

7) Diversification of continuous structure: butt clamp, flange, butt welding.

According to the economic conditions and the medium used and the on-site environmental conditions, the customer can choose whether the butterfly valve is soft or hard sealed.

Yes, but it depends on the switching frequency. For example, several times a minute. The more times, the shorter the lifespan. Reference.

It's enough, the three eccentric hard seals are still hard, and it's 13752153749

Hello, a hard seal is a metal-to-metal match-fit seal. Soft seals refer to metal and non-metal seals, generally referring to metal and rubber and metal and PTFE seals.