How to distinguish the type of check valve, there are several types of check valves

There are three types of check valves: (1) lifting type, (2) swing type, and (3) butterfly type.

The check valve stands for the letter h

The second number after h represents the connection method Generally divided into clamps, flanges, welding, and threads are (7, 4, 6, 1) respectively

The third number after h represents the body form: lift type 1Straight through runner 2Unilobe structure3Angular runner swing type 4Single-lobe structure5Multi-lobed structure 6Dual-office structure.

Column such as H44W-16P

Stainless steel swing check valve.

Connection: Flange Pressure Material Stainless Steel Seal: Body seal.

To distinguish a check valve model, it is first necessary to know the meaning of each character that makes up the check valve model.

The letter of the check valve stands for: H

The connection mode of check valve: 7 represents the clamp type, 4 represents the flange type, which are more common;

Check valve structure: according to the disc to determine, lifting disc: 1 represents the DC channel, 2 represents the vertical structure, 3 represents the angle structure; Swing valve disc: 4 represents single-lobe structure, 5 represents multi-lobe structure, and 6 represents double-flap structure; In addition, there is a code name representing the butterfly, the number 7;

Check valve sealing surface material: X stands for rubber seal, H stands for stainless steel seal, W stands for body seal.

For example, H77X-16 stands for butterfly check valve, H41X-16 stands for lifting check valve, and H44H-16 stands for swing check valve.

If you want to know more about it, you can do it privately.

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 are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, 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.

Check valves are copied according to the structure.

points, which can be divided into lifting check bai

There are three kinds of valves, swing check valves DU and butterfly check valves: Zhi1There are two types of lifting check valves: vertical and horizontal.

2.There are three types of swing check valves: single-petal, double-petal and multi-petal.

3.The butterfly check valve is a straight-through type.

The above check valves can be divided into four types in connection form: threaded connection, flange connection, welded connection and clamp connection.

Check valve refers to the valve that automatically opens and closes the valve disc by relying on the flow of the medium itself to prevent the medium from backflowing, also known as check valve, check valve, reverse flow valve, and back pressure valve. The check valve is an automatic valve, and its main function is to prevent the backflow of the medium, prevent the pump and the drive motor from reversing, and the discharge of the container medium.

Attention should be paid to the following matters in the installation of check valves:

1. Do not let the check valve bear the weight in the pipeline system, and the large check valve should be supported independently so that it is not affected by the pressure generated by the pipeline system.

2. During installation, pay attention to the direction of the medium flow should be consistent with the direction of the arrow marked on the valve body.

3. The lifting vertical flap check valve should be installed on the vertical pipeline.

4. The lifting horizontal flap check valve should be installed on the horizontal pipeline.

Different classification methods are different, generally divided according to the structure: 1) swing check valve 2) lifting check valve.

Version 3) Disc Check Valve 4) Pipeline Weight Check Valve 5) Air Discharge Check Valve 6) Slow Closing Check Valve 7) Diaphragm Check Valve 8) Wear-free Ball Check Valve 9) Float Type Fluoroplastic Lined Check Valve 10) Float Type Fluoroplastic Lined Y Check Valve 11) High Efficiency Silent Check Valve 12) Flow Control Buffer Check Valve 13) Swing Check Valve with Pneumatic Closing Device 14) Swing Check Valve with Pneumatic Device 15) Internal Pressure Self-sealing Valve Cover DC Type Swing Check Valve 16) Swing check valve with minimum flow nozzle 17) Clamp type silencer check valve 18) Clamp thin check valve 19) Double plate check valve for gas 20) Double disc plate buffer check valve 21) Electric slow closing butterfly check valve The rest is divided according to pressure, temperature, material, size, and connection method.

There are several types of check valves:

1. Lifting check valve: vertical and horizontal. The body shape of the lift check valve is the same as that of the shut-off valve, so it has a high fluid resistance.

The disc slides along the vertical centerline of the body. When the medium flows downstream, the disc is opened by the thrust of the medium, and when the medium stops, the disc falls on the valve seat by self-sagging.

2. Swing-open check valve: The disc of the swing-open check valve is disc-shaped, and the rotating motion is made around the rotating shaft of the valve seat channel, because the channel in the valve is streamlined, the flow resistance is smaller than that of the lifting check valve, which is suitable for small and medium-caliber, low-pressure and large-diameter pipelines (low-flow velocity and large-diameter occasions where the flow does not change often). The sealing performance is not as good as that of the lifting type.

Summary. Dear, I'm honored to have your question The information that the teacher has found for you here is: check valve specifications, models and dimensions; Check valve specifications, models and dimensions are:

Common types of check valves are: butterfly check valve (DH77X), swing check valve (H44H), silencer check valve (HC41X, swing check valve (with hammer) H44T-16Q swing check valve (with hammer) H44T-16Q H42X-16Q foot valve H42X-16Q foot valve HQ41X ball check valve HQ41X ball check valve, 1 2 DN15 quarter (4 cents) 3 4 DN20 six points (6 cents) 1 DN25 1 DN32 1 dn40 2 dn50 2 dn65 3 dn80 4 dn100。

Dear, I'm honored to have your question The information that the teacher found for you here is: check valve specifications and models; The specifications and models of check valves and the dimensions of the vertical shed are: the common types of check valves are:

Butterfly Check Valve (DH77X), Swing Check Valve (H44H), Silenced Check Valve (HC41X, Swing Check Valve (with Hammer) H44T-16Q Swing Check Valve (with Hammer) H44T-16Q H42X-16Q Foot Valve H42X-16Q Foot Valve HQ41X Ball Check Valve HQ41X Ball Check Valve, 1 2 DN15 Quarter (4 Cents) 3 4 DN20 Six Cents (6 Cents) 1 DN25 1 DN32 1 DN40 2 Contain dn50 2 dn65 3 dn80 4 dn100。

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Common check valve models are:

Clamp-down lift check valves H71X, H71H

Butterfly double flap check valves H76X, H76H, H77X silent check valves H42H, H42W

Micro Impedance Slow Closing Check Valve HH44H, HH46H, HH49H Rubber Disc Check Valve HC44X

Silencer check valve HC41H, HC41X, HC41T lifting check valve H41H, H41W

Swing check valves H44H, H44W

Different types of check valves, specifications are also different, we take butterfly check valve H77X as an example to introduce the check valve specifications.

There are many types of check valves, which can be divided into five types according to the material classification: cast iron check valves, stainless steel check valves, brass check valves, forged steel check valves, carbon steel check valves; According to the structure, it can be divided into three types: swing check valve, lifting check valve, butterfly check valve; According to the functional classification, it can be divided into five types:

DRVG Silent Check Valve, SFCV Rubber Disc Check Valve, DRVZ Silent Check Valve, DDCV Double Valve Check Valve, NRVR Silent Check Valve.

Check valve refers to a kind of valve that has a circular disc opening and closing parts and relies on its own weight and medium pressure to block the backflow of medium. It is an automatic valve, also known as check valve, check valve, return valve or isolation valve. The disc movement mode is divided into lifting type and swing type.

The lift check valve is similar in structure to the globe valve, with only the stem that drives the disc missing. The medium flows in from the inlet (bottom) and out from the outlet (top). The valve is opened when the inlet pressure is greater than the sum of the disc weight and its flow resistance.

Conversely, the valve is closed when the medium flows backwards.

Swing-start check valves have a tilted disc that rotates around the shaft and work similarly to a lift-lift check valve. Check valves are often used as foot valves for pumping devices to stop the backflow of water. The check valve is used in combination with the globe valve to play the role of safety isolation.

The disadvantage is that the resistance is high and the sealing is poor when closed.

1. DRVZ silent check valve;

2. DRVG stainless steel check valve;

3. NRVR silent check valve;

4. SFCV rubber disc check valve;

5. DDCV double-flap check valve.

Check valves are this type of valve that allows the flow of media in only one direction and prevents it from flowing in the opposite direction. Usually this kind of valve works automatically, and the disc opens under the action of fluid pressure flowing in one direction; When the fluid flows in the opposite direction, the fluid pressure and the self-closing disc of the disc act on the valve seat, thus cutting off the flow.