The check valve of carbon steel DN50 is available in several nominal pressures

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.

Boyuan valve replied: generally commonly used are PN16, PN25, PN40, PN64, .,pn100

Check valve in carbon steel to 64 kg pressure.

Stainless steel check valve DN65, 150 lbs., 70 mm for the clamp type and 140 mm for the double flange length, see GB T 12221-2005 Table 10 for details.

112 or 170 mm for flanged type, 46 mm for clamp type.

It is not clear which country the standard used for the valve is used. Both PN and PN correspond to the US standard.

The size of the pound class is 150 (majority), the size of the flange type pn= is 112mm, and the size of pn= is 170mm.

Refer to GB T 12221 "Structural Length of Valves".

Summary. Dear, hello, I am glad to answer for you: Check valve 40 DN25 refers to a type and specification of a check valve.

wherein, 40 means that the nominal pressure of the check valve is 40, and the unit is bar (bar); DN25 indicates that the check valve has a nominal diameter of 25 mm. Thus, the check valve 40 DN25 is a check valve with a nominal pressure of 40 bar and a nominal diameter of 25 mm. A check valve is a type of valve that prevents the backflow of media and is commonly used in piping systems to protect equipment and pipelines from the backflow of media.

What does check valve 40 DN25 mean?

Dear, hello, I am glad to answer for you: Check valve 40 DN25 refers to a type and specification of a check valve. Wherein, 40 means that the nominal pressure of the check valve is Bizhi Town 40, and the unit is bar; DN25 indicates that the check valve has a nominal diameter of 25 mm.

Therefore, the check valve 40 DN25 is a check valve with a nominal pressure of 40 bar and a nominal diameter of 25 mm. A check valve is a type of valve that prevents the backflow of media and is commonly used in piping systems to protect equipment and pipelines from the backflow of media.

What should I do if there is a leak?

Check valve 40 DN25 refers to a kind of valve on the pipe ant, where 40 represents the nominal diameter of the valve and DN25 represents the pipe size of the valve. The function of the check valve is to prevent the medium from flowing backwards in the pipeline and ensure the normal operation of the pipeline. If there is a leak in the check valve, it needs to be dealt with in time.

The specific methods are as follows:1First, close the valve on the pipe to stop the flow of the medium.

2.Check the check valve for loose or damaged valves, and if so, need to be repaired or replaced. 3.

If the seal face of the check valve is damaged or worn, the seal face needs to be replaced. 4.If the check valve gasket is aged or damaged, the gasket needs to be replaced.

5.If the check valve itself is cracked or damaged, the entire check valve needs to be replaced. In short, if there is a leak in the check valve, it needs to be dealt with in time so as not to affect the normal operation of the pipeline.

If you are not sure how to deal with it, you can contact a professional plumbing maintenance personnel for treatment.

Pro, according to your description: DN1200 valve pressure 6 kg flange thickness needs to be determined according to specific standards and requirements, generally need to consider the following factors: material standards:

The thickness of the flange generally needs to meet the relevant material standards, such as the international standard ISO, the American standard ASTM, the European standard EN, etc. Valve type: Different types of valves have different requirements for flange thickness, such as globe valves, ball valves, butterfly valves, etc.

Flange connection mode: flange connection mode includes butt welding, opposite welding, flange connection, etc., and the requirements for flange thickness are also different for different connection methods. Pressure Rating:

The higher the pressure rating, the thicker the flange needs to be increased accordingly. According to the general standards and requirements, the flange thickness of DN1200 valve pressure 6 kg should be between 40mm and 50mm. However, the specific thickness also needs to be comprehensively considered and determined according to the above factors, and it is recommended that you consult a professional valve manufacturer or a professional merchant when purchasing a valve to obtain more accurate technical support and suggestions.

DN200 is one example.

Check Valve PrincipleThe valve opening and closing parts of the check valve are opened or closed by the flow and force of the medium 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.

The lifting check valve can be divided into two types: vertical and horizontal. The swing check valve is divided into three types: single-valve type, double-valve leakage type and multi-valve type. The butterfly check valve is a straight-through type, and the above check valves can be divided into three types: threaded connection, flange connection and welding.

A check valve is a valve that automatically stops the flow of fluid. The disc of the check valve opens under fluid pressure and the fluid flows from the inlet side to the outlet side. When the pressure on the inlet side is lower than that on the outlet side, the disc automatically closes under the action of factors such as fluid pressure difference and its own gravity to prevent the fluid from backflowing.

The silent check valve is suitable for water supply and drainage, fire protection, and HVAC systems, and can be installed at the outlet of the water pump to prevent the backflow of the medium and the damage of the pump by water hammer.

The hydraulic check valve is suitable for the pump outlet pipeline where the medium is water, as a closed circuit and check valve, which is used to avoid and reduce the excessive backflow of the medium in the pipeline system and the excessive water hammer to protect the pipeline system.

The disc of the swing check valve rotates around the rotating shaft. Its fluid resistance is generally less than that of the lifting check valve, and it is suitable for larger diameter occasions. According to the number of discs, the swing check valve can be divided into three types: single valve swing type, double valve swing type and multi-valve swing type.

Single-lobe swing check valves are generally suitable for medium caliber applications.

The structure of the lifting check valve is generally similar to that of the globe valve, and its disc moves in a line along the channel, which is reliable in action, but the fluid resistance is large, and it is suitable for light and small diameter occasions. Lift check valves are available in both straight-through and vertical versions. Straight-through lift check valves can generally only be installed in horizontal pipelines, while vertical lift check valves are generally installed in vertical pipelines.

The micro-resistance slow-closing check valve is used in water supply and drainage pipelines, installed at the outlet of the water pump to prevent the reverse flow of the medium and eliminate the destructive water hammer, and can effectively reduce the pressure of water hammer when the valve is closed, which can ensure the safe operation of the pipe network. There is a reference to a check valve here.

Flange thickness requirements for check valve H41X- DN150.

According to the thickness of the national standard DN50 stainless steel flange check valve, the nominal outer diameter of the pants, the wall thickness of the standard steel pipe and the wall thickness of the thickened steel pipe, the corresponding inner diameter is distinguished; , can be installed, ordinary (not stainless steel) about 20 30 yuan (related to the size of the diameter).