How to choose a valve to prevent the backflow of materials?

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.

What exactly is a material? Backflow preventers, check valves, these can all prevent these backflows of water.

It can't be said that the plug valve is not suitable for regulating the flow of fluid and conveying particles containing materials, not only the plug valve, but also the gate valve and the globe valve! The plug valve is a shut-off or plunger-shaped rotary valve, which is a kind of valve that opens or closes by rotating 90 degrees to make the channel port on the valve plug the same or separate from the channel port on the valve body. The plug of a plug valve can be shaped in a cylindrical or conical shape.

In cylindrical plugs, the channel is generally rectangular; Whereas, in a tapered plug, the channel is trapezoidal. These shapes make the construction of the plug valve lightweight, but at the same time it incurs a certain loss. Plug valves are best suited for shut-off and turn-on media and shunt applications, but can sometimes be used for throttling depending on the nature of the application and the erosion resistance of the sealing surface.

Not only plug valves, but also ball valves, gate valves, globe valves, etc. are not suitable. Eccentric hemispherical valves are the best choice.

Really asked the right person, I built the material code of the SAP MM module of our valve.

The most basic principle is not to duplicate the code.

The second is to start from the source and achieve the version control of the documents issued by the technical department.

One link after another, the source of material coding is the technical department, so it is necessary to improve the overall awareness of the technical department.

Leave a mail and I'll send you a hardware for reference.,Or go to the library yourself.,free.。

I have it, valves, bathrooms.

A metal hard-seated ball valve with a fixed ball fully enclosed cavity should be used.

The valve is a mechanical device that controls the flow, flow direction, pressure, temperature, etc. of the flowing fluid medium, and the valve is the basic component of the pipeline system. Valve fittings are technically the same as pumps and are often discussed as a separate category. The valve can be operated manually or with a handwheel, handle or pedal, and can also be controlled to change the pressure, temperature and flow rate of the fluid medium.

These changes can be operated continuously or repeatedly, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as needed to regulate the changing set points of flow through the pipes based on external inputs.

The automatic control valve does not need to be operated manually, according to its input and settings, so that the valve can accurately control the requirements of the fluid medium. According to the material, the valve is also divided into cast iron valve, cast steel valve, stainless steel valve, chromium-molybdenum steel valve, chromium-molybdenum vanadium steel valve, duplex steel valve, plastic valve, non-standard customized and other valve materials.

The valve is a control component in the pipeline fluid transportation system, which is used to change the channel section and the direction of medium flow, and has the functions of diversion, cut-off, regulation, throttling, check, diversion or overflow pressure relief.

Valves for fluid control, from the simplest globe valves to the most complex automatic control systems used in a variety of valves, its varieties and specifications, valves from the very small instrument valve to the diameter of 10m for industrial pipelines. The valve can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metal and radioactive fluids, the working pressure of the valve can be from 1000MPa ultra-high pressure, and the working temperature can be from -269 ultra-low temperature to 1430 high temperature.

The control of the valve can adopt a variety of transmission modes, such as manual, electric, hydraulic, pneumatic, worm gear, electromagnetic, electrohydraulic, gas-hydraulic, spur gear, bevel gear drive, etc.

Under the action of pressure, temperature or other forms of sensing signals, according to the predetermined requirements of action, or do not rely on the sensing signal and simply open or close, the valve relies on the drive or automatic mechanism to make the opening and closing parts lift, slide, swing or slew movement, so as to change the size of its flow channel area to achieve its control function.

It is best not to use carbon steel valves for polysilicon valves, generally SS316 valves, with degreasing valves, such as model TFQ41Y-16RL, model description for ball valve 316L chromium-molybdenum steel, graphite for packing, hard sealing, degreasing and degreasing, and the specifications and requirements required by the manufacturer are described at the time of purchase, and these valve factories can be achieved. For example, TBEA's polysilicon projects use SS316 and the above requirements, but the landlord can ask more manufacturers to ask.

The valve used in this part of the system you said is used to block the valve, if the switch is frequent, you can contact the manufacturer to use the electric high-power actuator at the time of the first type, and the problem of oil in the graphite filler can be better solved, and you can use felt.

Forged steel valves can be used, that is, the quality will not be very stable, the above friends are recommended with you stainless steel, I also highly recommend stainless steel valves, with a long time, although the ** is relatively high, but the quality is stable, if you must use forged steel valves, you will ask some manufacturers of technical personnel, I hope it will be helpful to you, but also hope that the owner adopts!

We are a valve manufacturer, in the past, polysilicon users also required degreasing and degreasing, degreasing and degreasing, if there is a requirement, the degreasing process can be treated, and it will be treated before leaving the factory, in order to remove the grease more thoroughly, it will be done once when the semi-finished product is made. The packing can be used with F4 gate valve globe valve, the only thing that can be done is to replace the packing with F4, F4 has good self-lubricating performance, but the temperature can not be over 150

It is best not to use carbon steel, unless the trim is made of stainless steel, which is fine.

It is not recommended to use carbon steel, the use of this material will bring you a lot of trouble, use stainless steel, so that there is not so much trouble, find a manufacturer to say the requirements, they will help you solve the problem, you can save a lot of things, there are things you don't understand to consult conveniently. Think about it.

Our company uses stainless steel.

There seem to be many reasons why the feed pump of the filter press cannot produce liquid materials, let me tell you a few points: 1, there is air in the suction pipe 2, the suction pipe is leaking 3, the pump is not enough to fill the liquid 4, the suction pipeline is blocked by debris 5, the pump is reversed 6, the suction height is too high to solve the solution 1, re-infill the liquid 2, check the suction pipeline 3, re-infill the liquid 4, remove the blocked debris 5, adjust the steering 6, reduce the installation height, if you still don't understand, you can go to this ** to view Xingxin separation equipment Satisfied, please adopt.

The liquid level is lower than the inlet of the pump, and the suction arrangement is carried out, and the pump should be filled before the pump is opened to discharge the air in the pump before opening the pump.

Do you want the pump outlet valve to open or close? If the inlet is closed, there will still be material flowing through?

If the valve of the pump is open and material flows through, there should be pressure at the outlet. If it is not displayed, it is possible that the gauge buffer pipe is clogged or the gauge is broken, or the gauge is too large.

Check the pressure gauge pressure position, which should be in front of the outlet valve. Check the pressure gauge for damage. When cavitation occurs in a pump, it is accompanied by severe vibration and noise, and since you didn't mention it, it should not have occurred.

Process control. 1 Quality planning is for a specific product, project or contract.

2. The content of the quality plan should stipulate specific quality measures, resources and sequence of activities. 3 The quality plan should be consistent with the requirements of the quality manual, which can be referred to the relevant sections of the manual that are applicable to specific situations.

4. The quality plan should be in writing, which is an integral part of the quality system document.

5 Quality planning is often a result of "quality planning". It is an object-specific document that is an "activity to determine quality and the objectives and requirements for the adoption of elements of the quality system".

aI studied process equipment and control engineering, and now many students are doing this industry, and this answer is correct.