Connection dimensions of silencing check valves, check valve size table

Nominal pressure. pn

mm) Nominal diameter.

dnmm) size (mm) nominal pressure.

pnmm) Nominal diameter.

dnmm) Dimensions (mm) l d k b z- d l d k b z- d 40 112 145 110 18 4-18 40 112 145 110 18 4-18 50 120 160 125 20 4-18 50 120 160 125 20 4-18 65 130 180 145 20 4-18 65 130 180 145 20 4-18 80 150 195 160 22 8-18 80 150 195 160 22 8-18 100 165 215 180 24 8-18 100 165 215 180 24 8-18 125 190 245 210 26 8-18 125 190 245 210 26 8-18 150 210 280 240 26 8-22 150 210 280 240 26 8-22 200 255 335 295 28 8-22 200 255 335 295 30 12-22 250 310 390 350 28 12-22 250 310 405 355 32 12-26 300 320 440 400 28 12-22 300 320 460 410 32 12-26 350 380 500 460 30 16-22 350 380 520 470 36 16-26 400 405 565 515 32 16-26 400 405 580 525 38 16-30 450 430 615 565 32 20-26 450 430 640 585 40 20-30 500 450 670 620 34 20-26 500 450 715 650 42 20-33 600 510 780 725 36 20-30 600 510 840 770 48 20-36

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.

The letter of the check valve is represented as the inside: h The connection square of the check valve: 7 represents the clamp type, 4 represents the flange type, which are more common; Check valve structure:

According to the valve disc, the lifting valve disc: 1 represents the DC channel, 2 represents the vertical structure, and 3 represents the angular 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, and 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.

Hope mine can help you.

h The connection square type 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 DC channel, 2 represents vertical structure, 3 represents angular 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. Hope mine can help you.

Working principle: Under the action of fluid pressure flowing in one direction, the valve disc opens; 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. Among them, check valves belong to this type of valve, which includes swing check valves and lifting check valves.

The swing check valve has a medium hinge mechanism and a door-like disc resting freely against the sloping seat surface. In order to ensure that the disc reaches the right position on the seat surface every time, the disc is designed with a hinge mechanism so that the disc has enough room to swing and that the disc is in true and full contact with the seat. The disc can be made entirely of metal, or it can be inlaid with leather, rubber, or synthetic overlay, depending on the performance requirements.

When fully open, the fluid pressure is virtually unhindered, so the pressure drop through the valve is relatively small. The disc of the lift check valve is located on the seat seal on the valve body.

Abstract:The silencer check valve is a kind of check valve that can reduce or eliminate the noise generated by the water flow through the valve, and the reason why it has the effect of silencing is that the internal water flow path of the silencer check valve adopts a streamlined design, the head loss is very small, and the valve disc can be quickly closed to avoid water hammer and prevent the sound of huge water hammer, so as to have the effect of silencing. In addition to the silencer check valve, there is also a silent check valve, comparatively speaking, the principle and function of the two are similar, but the silence effect of the silent check valve is better, and the sound can be directly shielded.

Let's take a look at the silencer check valve. 1. How is the silencer check valve silenced.

The check valve can prevent the internal medium from backflowing, but it has a disadvantage, that is, it will produce relatively large noise, in some special occasions, lower noise is required, so there is a valve of the silencer check valve, so what is the silence principle of the silencer check valve?

Ordinary check valves will have noise, mainly because the water pressure and flow are affected in the process of water flow, and there is a certain amount of energy loss, which produces water hammer and noise; The internal water flow path of the silencing check valve adopts a streamlined design, and the head loss is very small, which is about 1 2-1 3 compared with the ordinary check valveAt the same time, because the disc of the silencing check valve is spring-loaded, the disc closing stroke is very short when the pump is stopped, and it can be closed quickly to avoid water hammer and prevent the sound of huge water hammer, so as to achieve the effect of silencing.

2. What is the difference between a silencing check valve and a silent check valve?

Silencer check valve and silent check valve are both commonly used in hydraulic control valves in a type of hydraulic valve, installed at the outlet of the water pump, to avoid huge water hammer, to prevent backflow, the effect is similar, and can reduce noise when in use, but these two kinds of check valves also have some differences.

The difference between the silencer check valve and the silent check valve is mainly in the silencing ability, the silencer check valve only eliminates the noise and reduces the noise; The silent check valve can directly shield and mute the sound when in use.

The reason why the silent check valve has a stronger silencing ability than the silencing check valve is mainly because of the difference in principle, the silent check valve, which adopts the contour design in line with hydraulics, obtains the best streamlined waterway next to the filial piety, and the design of the internal attachment to the fluid can ensure small pressure loss; The silent check valve is installed at the outlet of the water pump, which can be quickly closed before the water flows backwards, avoiding water hammer, water hammer and destructive impact, so as to achieve a silent effect.

The silencing effect of the silencer check valve and the silent check valve is different, and the use is mainly based on the needs of customers and the use of occasions to choose.

Silencer 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, silencer check valve, reverse flow valve, and back pressure valve.

The so-called silencing means that there are measures to reduce the sound of the disc striking when the valve is closed.

The internal structure and operating principle of the waterproof hammer silencer check valve at the outlet end of the water system pipeline and water pump.

The silencing check valve is a kind of lifting check valve, the model is HC41X-16, the silencing check valve adopts the contour design in line with hydraulics to obtain the best streamlined waterway, the design with fluid conduction inside can ensure a small pressure loss, the silencing check valve can be quickly closed before the water flow backflow to avoid water hammer, water hammer sound and destructive impact to achieve the effect of noise elimination. It is mostly used in water supply and drainage systems, high-rise building pipe networks, etc.