What is the H42H check valve of the light valve, and what should I pay attention to when using it?

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.

H42H=Flanged vertical lifting check valve.

H - check valve.

4 - flange connection.

2 - find in the valve model preparation, check valve 2 represents the vertical, lifting disc.

H - CR13 stainless steel.

The return valve H44H is a rotary stop; The check valve H41H is of the lifting type.

The lifting type has better sealing performance than the rotary opening type, and the fluid resistance is large, and the horizontal type should be installed on the horizontal pipeline, and the vertical type is installed on the vertical pipeline; The swing check valve can be installed in a horizontal or vertical pipeline, such as on a vertical pipeline, and the medium flow direction should be from the bottom up.

The following precautions should be paid to the installation of check valves:

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

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.

Extended information: 1. Check valve, also known as check valve, is an automatic valve, which relies on the pressure of the flowing medium in the pipeline to push the valve disc to realize the closing and opening of the valve, when the medium stops flowing, the check valve disc is closed, which can effectively prevent the medium in the pipeline from backflowing, which plays a great role in ensuring the safety of the pipeline. According to the structure, the check valve can be divided into three types: lifting check valve, swing check valve and butterfly check valve.

Lifting check valves can be divided into vertical and straight-through types. There are three types of swing check valves: single-petal, double-petal and multi-petal. Butterfly check valves are divided into butterfly double valve, butterfly single valve, the above check valves can be divided into four kinds of connection form: threaded connection, flange connection, welding and clamp connection.

2. The purpose of installing the check valve is to ensure the flow direction of the internal water flow of the pump, so as to ensure the normal operation of the pump. Therefore, the installation position of the check valve, whether it is installed in front of the pump or behind the pump, can be divided into two situations: one is installed in front of the pump, the end of the vertical suction pipe, also called the bottom valve.

The purpose is to fill the pump with water once without pumping water, because the pump can only idle and pump water when there is no water in the pump and in the suction pipe in front of the pump, so the pump must be filled with water to pump out the water. This kind of pump is installed as a method when it is higher than the liquid level, also known as the negative pressure method. The other is installed at the rear of the pump.

This installation method is when the liquid level is higher than the pump, which is convenient to start and stop the pump without closing the pump outlet valve, especially for the mother tube pump system, to prevent backflow.

The second H in the check valve H44H-16C indicates that the material of the seal is stainless steel, that is, the valve is hard sealed.

H44H swing type steel stop valve is suitable for the pressure of -29 +550 in the petroleum, chemical, pharmaceutical, fertilizer, power industry and other working conditions of the pipeline, the applicable medium is water, oil, steam, acid medium, etc. It is a valve that controls the unidirectional flow direction of the medium in the pipeline to prevent the medium in the pipeline from backflowing.

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.

The core is stainless steel, and the standard point of view is stainless steel sealing, and the second h is stainless steel in the standard.

The second h indicates that the material of the seal is stainless steel, i.e. the valve is hard sealed.

Alloy steel seal, is a hard seal.

The HC41X-16Q check valve of the standard valve is a flanged silencer check valve.

Features of HC41X-16Q Flanged Silencer Check Valve:

The structural features of the silencer check valve only allow the medium to flow in one direction and prevent it from flowing in one 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. It should not be used in media containing solid particles and high viscosity.

When the medium flows in the specified direction, the valve disc is opened by the force of the medium; When the medium is reversed, the valve disc and the sealing surface of the valve seat are closed due to the action of the self-weight of the valve disc and the reverse force of the medium, so as to prevent the medium from flowing backwards.

1. The fluid passage is smooth, and the local head loss is small;

2. There is a guide device, flexible closing, linear sealing, good check effect, which can effectively reduce closing noise;

3. Small size, light weight, easy to install and maintain.

The HH46X, HH48X, and HH49X models of the standard valve are slow to close butterfly check valves.

It is mainly used in the water supply and drainage pipelines of water purification, source water, sewage, seawater and other media, and is installed at the outlet of the water pump to cut off the return flow of the medium to eliminate the water hammer of the damaging of atomic energy, and to protect the safe operation of the road and water pump.

HH46X HH48X HH49X Slow Closing Butterfly Check Valve Main Features:

1. Small size, light weight, and the length of the structure is only about one-third of the swing check valve.

2. The slow closing system has excellent performance, which is not affected by the medium in the pipeline, and the valve disc is quickly closed first and then slowly closed, which can prevent breaking water hammer.

3. Rubber soft sealing, good sealing performance, wear resistance and long service life.

4. Rubber cushioning, stable opening and closing, no vibration, no noise.

5. The flow resistance is smaller than that of the old-fashioned check valve, and it has obvious energy-saving effect.