Classification of stainless steel check valves, what are the classifications of stainless steel chec

The common fault of the pneumatic ball valve of Tyco valve is that the actuator does not act, the actuator acts, but the torque is not enough, the pneumatic ball valve can be opened or closed, but the action is slow, the actuator action is normal, but the valve does not act, the actuator action is normal, but the valve switch is not in place. These problems should be checked and solved in a timely manner so as not to delay the normal progress of the work. The following is a small series detailing the causes and solutions of common faults of pneumatic ball valves.

1. Causes of actuator failure 1. Check whether the air source pressure of the inlet and outlet air filter pressure reducer reaches the rated value, increase the air source pressure or replace the air filter pressure reducer as appropriate; 2. Check whether the solenoid valve is blocked, whether the ventilation action is normal, and remove the blockage or replace the solenoid valve according to the situation; 3. Check whether the pressure of the air source entering the actuator reaches the rated value, and check whether the governor is

The function of a check valve is to allow the flow of media in only one direction and to 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. 1) The principle of making the original plastic check valve is the same.

The whole is made of stainless steel or stainless iron. It needs to be punched for installation, and the advantage is that it plays a role in one-way fire prevention, and the smoke prevention effect is average.

2) It is the latest snap-on installation of a new type of check valve, which is composed of stainless steel or stainless iron as a whole, and the valve blade type hinge type opening and closing sealing performance is better. The installation is simpler, the only drawback is that it is still one-way fireproof. It does not meet the requirements of the State Fire Administration.

A check valve in which the disc rotates around a pin shaft inside the seat. The disc check valve has a simple structure and can only be installed on a horizontal pipeline, which has poor sealing.

What is a stainless steel check valve? Stainless steel check valve is a kind of check valve made of stainless steel, this check valve can be automatically switched on and off according to the speed and force of the medium flow, it is a valve that can prevent the backflow of the medium, this valve is used to prevent the backflow of the medium, so it is called the check valve. The check valve is also an automatic valve, which is a valve that can be installed on the pipeline to open automatically, and this kind of valve is mainly to prevent accidents.

Let's take a look at the classification of stainless steel check valves.

First, the style classification

The opening and closing parts are opened or closed by the force of the medium flow to prevent the medium from flowing backwards. Check valves belong to the automatic valve category, which are mainly used on pipelines where the medium flows in one direction, and only allow the medium to flow in one direction to prevent accidents.

According to the structure, the check valve can be divided into three types: lifting check valve, swing check valve and butterfly check valve

1.There 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.

Second, the structure

Check valve: According to the structure, it 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, and the above check valves can be divided into four types of threaded connection, flange connection, welding and clamp connection in the connection form.

3. Installation

The following precautions should be taken into account for 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.

Fourth, material classification

1.Cast iron check valve.

2.Brass check valve.

3.Stainless steel check valve.

4.Carbon steel check valve.

5.Forged steel check valve.

The above is the classification and characteristic structure of stainless steel check valve, do you know what are the structural characteristics of stainless steel check valve? When we install stainless steel check valves, we need to pay attention to some things, for example, in the process of installation, we should pay attention to the weight of the waiter, not all check valves are suitable for installation on the pipeline, we have to install the check valve according to the weight of the pipeline. When installing the check valve, it is also necessary to pay attention to the flow direction of the medium, if the direction is reversed, it cannot be used.

You can get it for free

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 Co., Ltd., 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's worth noting that market and industry developments are changing 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.

1. Swing-open check valve. The swing check valve is suitable for low flow rates and large diameter occasions where the flow does not change frequently, but it is not suitable for pulsating flow, which is used to prevent the flow of the medium from stopping or backflowing, and to reduce the hydraulic shock. There are three forms: single-petal, double-petal and multi-half.

2. Lifting check valve. The lifting check valve can only be installed on the horizontal pipe and can be used in conjunction with the globe valve to prevent the reverse flow of the medium.

3. Butterfly check valve. The disc of the butterfly check valve rotates around the pin shaft in the valve seat, and the structure of the disc check valve is relatively simple, and can only be installed on the horizontal pipeline, but the sealing is poor.

4. Pipeline check valve. The pipeline check valve is small in size, light in weight and has good processing performance.

5. Compression check valve. The compression check valve is a boiler feed water and steam shut-off valve, which has the comprehensive function of lifting check valve and globe valve or angle valve.

If netizens want to buy check valves, you can try to buy the above.

1. Plastic check valve: the plastic check valve body is light in weight, corrosion resistance, compact and beautiful in appearance, light in weight and easy to install, strong in corrosion resistance, wide range of applications, hygienic and non-toxic material, wear-resistant, easy to disassemble, and simple and easy to maintain.

2. Swing-open check valve: For the large diameter that does not change much in the flow process or at low flow rate, you can use the swing-type check valve. However, this kind of check valve is not suitable for the caliber of pulsating flow, because its main function is to avoid the phenomenon of flow or inverted delay flow when the medium is stopped, and if it is used in pulsating flow, it will weaken the impact ability of hydraulic force.

3. Lifting check valve: The lifting check valve has certain requirements for the installed pipeline, which is only suitable for horizontal pipelines, and its function is to prevent the phenomenon of reverse flow of the medium, and can also be used with the globe valve.