What is the general opening pressure of DN80 clamping double flap swing check valve?

The opening pressure of the clamp-type check valve is generally as follows:

If there is a special customization, it depends on the size of the spring elastic force, the greater the elastic force, the greater the opening pressure, the smaller the elastic force, the smaller the opening pressure.

Here are some of the well-known brands recognized in the clamp check 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.

Search: What is the general opening pressure of DN80 clamp double valve swing check valve.

If it is installed vertically, the pressure drop is equivalent to the two elbows, if it is installed horizontally, the pressure drop is equivalent to the pressure generated by the weight of the disc of the two elbows + swing check valve.

The starting pressure of the springless screw-up check valve is related to the thickness of the check plate, and the thicker and heavier it is, the pressure difference between the front and rear can only be opened.

The starting pressure of a spring-loaded check valve is related to the spring in addition to the thickness of the check plate.

FYI.

1) Check valve: generally suitable for clean media, not suitable for medium containing solid particles and high viscosity.

2) For low-pressure check valves below DN50mm, it is advisable to choose clamp check valves and vertical lifting check valves; For medium and low pressure check valves with dn greater than 200mm and less than 1200mm, it is advisable to choose check valves with water hammer elimination devices such as micro resistance slow closing check valves, buffer check valves, etc.; For low-pressure check valves with dn greater than 50mm and less than 2000mm, butterfly check valves and swing check valves should be selected.

3) The micro-resistance slow-closing check valve is suitable for pipelines that are prone to water hammer, and the micro-resistance slow-closing system can well eliminate the water hammer generated when the medium is reversed, but it is limited by temperature and pressure, and is generally used in low-pressure and normal temperature pipelines.

4) For pipelines that require small water hammer impact or no water hammer when closed, it is advisable to choose micro-resistance slow-closing check valve and buffer butterfly check valve.

Key points of construction and installation.

1) The installation position, height, and inlet and outlet directions must meet the design requirements, and the direction of medium flow should be consistent with the direction of the arrow marked on the valve body, and the connection should be firm and tight.

2) The visual inspection must be carried out before the valve is installed, and the nameplate of the valve should comply with the provisions of the current national standard "General Valve Mark" GB 12220. For valves with working pressure greater than MPA and shut-off on the main pipe, strength and tightness performance tests should be carried out before installation, and they should be used only after they are qualified. During the strength test, the test pressure is times of the nominal pressure, the duration is not less than 5min, and the valve housing and packing should be qualified without leakage.

During the tightness test, the test pressure is multiple of the nominal pressure; The duration of the test meets the requirements of GB 50243.

3) Do not make the check valve bear the weight in the pipeline, and the large check valve (AETV one-way valve): it should be supported independently, so that it is not affected by the pressure generated by the pipeline. Key points of construction and installation.

1) The installation location, height, and direction of the inlet and outlet must meet the design requirements, and the connection should be firm and tight.

2) All kinds of manual valves installed on the insulation pipeline, the handle shall not be downward.

3) The visual inspection must be carried out before the valve is installed, and the nameplate of the valve should comply with the provisions of the current national standard "General Valve Mark" GB 12220. For valves with working pressure greater than MPA and shut-off on the main pipe, strength and tightness performance tests should be carried out before installation, and they should be used only after they are qualified. During the strength test, the test pressure is times of the nominal pressure, the duration is not less than 5min, and the valve housing and packing should be qualified without leakage.

During the tightness test, the test pressure is multiple of the nominal pressure; The test pressure should meet the requirements of GB 50243 standard for the duration of the test, and the sealing surface of the valve disc should be qualified if there is no leakage.

1. When selecting check valves, the size of the pressure level should correspond to the pressure level of the pipeline.

2. Check valves, like other valves, have a pressure level of MPa......Wait a minute. If your pipe is between standard pressures, choose one pressure level higher. For example, the minimum check valve for pipeline pressure.

Multiply the pressure rating of the pump or pipe. If you can't meet the upward leaning.

If the pressure of the pump is, the pressure rating of the check valve can be selected;

If the pressure of the pump is, the pressure rating of the check valve can be selected;

If the pressure of the pump is, the pressure rating of the check valve can be selected;

If the pressure of the pump is, the pressure rating of the check valve can be selected;

That is, on the basis of meeting the pressure level, there should be a certain safety margin.

Butterfly check valve.

Butterfly check valve refers to a valve that automatically opens and closes the valve disc by relying on the flow of the medium itself to prevent the backflow of the medium, 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. Check valves can also be used on lines that supply auxiliary systems where pressure may rise above the system pressure.

Check valves can be mainly divided into swing-type check valves (rotating according to the center of gravity) and lifting check valves (moving along the axis).

The function of the butterfly check valve is to allow the flow of the medium in only one direction and to prevent it from flowing. 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.

Clamp double-flap check valve.

The double-valve check valve is used for pure pipelines and industrial, environmental protection, water treatment, and high-rise building water supply and drainage pipelines to prevent the reverse flow of media. The check valve adopts the clamp type, the butterfly plate is two semicircles, and the spring is used to force the return, and the sealing surface can be the body surfacing wear-resistant material or rubber lining, the use range is wide, and the sealing is reliable.

In the general case of pumping station engineering, the following principles should be followed for the selection of pump outlet check valve;

For the pipeline with a small diameter of the pump outlet pipeline, that is, DN<50mm, a lifting check valve should be selected.

For the pipeline diameter of the pump outlet pipeline DN 50mm, the swing check valve should be selected, and the swing check valve can be installed horizontally or vertically. The swing-type check valve disc rotates around the rotating shaft, and its fluid resistance is generally less than that of the lifting check valve, it is suitable for larger diameter occasions, the installation position is not restricted, usually installed in the horizontal pipeline, it is suitable for larger diameter occasions. According to the number of valve discs, it can be divided into three types: single-lobe swing type, double valve swing type and multi-valve swing type.

Single-lobe swing check valves are generally used in medium-caliber applications. When a single-valve swing-open check valve is selected for large-diameter pipelines, it is best to use a slow-closing check valve that can reduce the water hammer pressure in order to reduce the water hammer pressure. The double-flap swing-open check valve is suitable for large and medium-diameter pipelines.

The double-flap swing-on check valve is small in structure and light in weight, and is a fast check valve; The multi-lobe swing check valve is suitable for large-diameter pipelines.

Oooh oh! I don't know how to tell you.

Flange connection, swing type single lobe construction, nominal pressure 10 bar, check valve in carbon steel. The sealing surface is copper alloy.

h Check valve.

4 Flanged type.

4 (2nd) Swing type.

t Sealing surface material: copper.

10 Nominal Pressure:

c Body material: carbon steel.

Swing start check valve, copper seal, 10kg pressure, cast steel material.

1) Product standards.

General Valve Iron Swing Check Valve GB T 13932-92 "General Valve Steel Swing Check Valve" GB 12236 -2008 "General Valve Iron Globe Valve and Lifting Check Valve" GB 12233 -2006 "Clamp Check Valve" JB T 8937-2010 "Steel Valve General Requirements" GB T 12224-2005 "Inspection and Test of Valves" JB T 9092-19992), Engineering Standards.

Code for Construction Quality Acceptance of Building Water Supply and Drainage and Heating Engineering" GB 50242-2002 "Code for Construction Quality Acceptance of Ventilation and Air Conditioning Engineering" GB50243-20023), related standard drawings.

01SS105 Commonly used small instruments and special valves are selected and installed.

1. Single-petal type: the flower is single-petaled, white, with 6-lobed perianths, and a golden-yellow ring-shaped secondary crown in the center, so it is called"Marigold Table"Also known as"Wine glass daffodils"；If the secondary crown is white, with many flowers and thin leaf tips, it is called"Silver cup jade platform"。2. Double valve type:

The flowers are double-petaled, white, and the perianth is 12-lobed and rolled into a cluster, called"Narcissus louver"or"Jade exquisite", the flower shape is not as beautiful as a single petal.

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Double-petal. <>

Multi-petal. <>