How many milliliters is 1 bubble in the valve test

18 bubbles count as 1 ml, do the math yourself.

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 volume of this bubble is not the same under different water pressures. Your question is not specific enough.

Since it is a bubble, the large one will not exceed the milliliter, and the small bubble should be milliliter or even smaller.

There are 2 types of valve leakage levels, ANSI and 6 grades, and the commonly used leakage levels for general valves are 4 (IV), 5 (V), and 6 (VI). Different leakage levels have different corresponding requirements. Let's look up the specific criteria.

I will provide you with a profile.

The medium refers to the test of each item whether the test is done with water, air or oil.

When the valve leaves the factory, the necessary testing should be carried out, and the test should be carried out in accordance with the normal procedures and standards to ensure that the valve will not be damaged in the process of transportation, storage, installation, use and maintenance, so as to ensure the safety of the equipment.

The valve test medium is 5-40 clean gas (air or nitrogen) or liquid (water or gas).

Valve test pressure a procedure is: when the allowable pressure difference of the valve is greater than 350kpa, the test pressure is done according to 350kpa, and when it is less than 350kpa, the allowable pressure difference is done. Procedure b is:

Do it according to the maximum operating pressure difference of the valve. The test signal pressure should ensure that the valve is closed.

At the time of program A, the signal pressure of the actuator of the air-opening valve is zero; The signal pressure of the actuator of the gas shut-off valve increases by 20kpa to the upper limit of the input signal; The signal pressure of the actuator of the two-position valve shall be the specified value of the design. In the B procedure, the signal pressure of the actuator is according to the specified design value. The test medium should be added to the valve according to the specified flow direction, and the valve outlet can be directly connected to the atmosphere or connected to the outlet through the atmosphere of the low-pressure loss measurement device, when it is confirmed that the front and downstream connection pipes in front of the valve are completely filled with the medium can be measured.

The number of bubbles per minute is measured under the condition that the tube with an outer diameter of 6mm and a wall thickness of 1mm is vertically immersed in water to a depth of 5-10mm, and the surface of the pipe end should be smooth, without chamfering and burrs.

ANSI (American National Standard) standard, which is used for general straight-through single-seat valves;

API 598 (American Petroleum Institute Standard), which is used for ball valves, butterfly valves, gate valves, etc.

The unit of general use is mm3 s, ml min, or the number of drops, the number of bubbles;

Please refer to the Valve Design Manual - Valve Leak Testing;

milliliters per minute or bubbles per minute.

Valve leakage refers to the standard (design) working pressure of the valve

1. The ratio of the allowable flow rate to the leakage volume of this valve. Such as 1, 3/10,000;

2. Allowable (occurring) actual (liquid) leakage. e.g. 5 ml min;

3. Allowable (occurring) actual (gas) leakage. e.g. 3 minutes (the number of bubbles coming out of the downstream);

Hard Seal Ball Valve, Manual Cast Steel Hard Seal Ball Valve Body Surface Using Advanced Spraying Technology, Through the Treatment of Various Different Working Conditions, the highest hardness can reach HRC78. The sealing surface of the valve seat can be treated with a maximum hardness of HRC72. The ball and seat are paired and ground, and all sealing areas of the entire sealing surface of the ball valve are precision ground.

It is suitable for water, steam, oil, coal, fiber, thick and corrosive media, as well as media with particles at high temperature and pressure. Metal sealed ball valves have two structures: floating ball and fixed ball, and the metal seat ring is in contact with the spherical surface, and the seat ring and the spherical surface are sealed by acting on the uniform spring load on the seat ring.

Due to the action of the spring load, the auxiliary seal expands, and the sealing between the valve body and the valve seat is realized. The spring load is sufficient to provide a reliable seal between the seat and the ball, and at low pressures, a grease injection system can be designed between the seat seal face and the ball.

The leakage level of the valve is actually the sealing level of the valve. Generally, there are two kinds of national standards and American standards. The valve leakage rating is used in the valve leakage test and is an important reference standard.

Generally, it is in accordance with the requirements of the process. In the conditions and processes of the process, there will be requirements for the leakage level of the valve. Generally, Class V is required, but for some valves, the instrument will purchase a higher grade. For engineering testing, the bubble method is used.

There are six levels of valve leakage, with the highest level being six, also commonly referred to as zero leakage.