Question 1

What Is A Pinch Valve?

Accepted Answer

A pinch valve is a type of fluid control valve. It applies a pinching force to the outer surface of flexible tubing. While pinching it collapses and seals the tubing to control fluid flow or pressure.
The main body of a pinch valve is not in direct contact with the gas or the liquid, and only the inside of the tube will have direct contact with the liquid and gas fluid flowing through. Therefore, the pinch valve is not in direct contact with the fluid.

We hope you have enjoyed reading the article. Please remember to visit our product page.

Question 2

Why Use Pinch Valves?

Accepted Answer

Industry leaders looking for a low-maintenance and more cost-effective solutions for controlling liquids, gases, slurries and powders (incl. corrosive media) in a pipeline are turning to pinch valves over traditional valves (diaphragm valves, ball valves, butterfly valves, needle valves, etc.) Unlike traditional valves, pinch valves feature a straight-through flow, very little pressure drop over the valve, and full shut-off of media in the tube, making it the most practical and efficient solution for various ON/OFF flow control applications.

We hope you have enjoyed reading the article. Please remember to visit our product page.

Question 3

The basic knowledge and common errors and solutions of solenoid valve (2)

Accepted Answer

4. Applicability
(1) Medium characteristics
1.1 Choose different types of solenoid valves for gas, liquid or mixed state. For example, ZQDF is used for air, ZQDF-Y is used for liquid, and ZQDF-2 (or -3) is used for steam, otherwise it is easy to cause malfunction. ZDF series multi-function solenoid valve can be connected to gas and liquid. It is best to inform the state of the media when ordering, so that the installation user does not have to adjust the mode.
1.2 The medium temperature is different for products of different specifications, otherwise the coil will burn out and the seals will be aged, which will seriously affect the service life.
1.3 Medium viscosity, usually below 50cSt. If it exceeds this value, the ZDF series multi-function solenoid valve should be used for special order if the diameter is larger than 15mm. The diameter is less than 15mm to order high viscosity solenoid valve.
1.4 When the cleanliness of the medium is not high, a recoil filter valve should be installed in front of the solenoid valve. When the pressure is low, a direct-acting diaphragm solenoid valve can be used.
1.5 If the medium is in directional circulation, and reverse flow is not allowed, ZDF-N and ZQDF-N only need to use bidirectional circulation, please make special requirements.
1.6 The medium temperature should be selected within the allowable range of the solenoid valve.

(2) Pipeline parameters
2.1 Select the valve diameter and model according to the medium flow direction requirements and the pipeline connection method.
2.2 Select the nominal diameter according to the flow rate and Kv value of valve, or the same as the inner diameter of pipeline.
2.3 Working pressure difference, indirect pilot type can be used when the minimum working pressure difference is above 0.04Mpa; direct-acting type or step-by-step direct type must be used when the minimum working pressure difference is close to or less than zero.

(3) Environmental conditions
3.1 The maximum and minimum temperature of environment should be selected within the allowable range. If there is any excess, a special order should be made.
3.2 When the relative humidity in the environment is high and there is water droplets and rain, the waterproof solenoid valve should be selected.
3.3 There are often vibrations, bumps and shocks in environment, and special varieties should be selected, such as marine solenoid valves.
3.4 For use in corrosive or explosive environments, corrosion resistance should be selected first according to safety requirements.
3.5 If the environment space is limited, please choose a multi-function solenoid valve, because it saves the bypass and three manual valves and is easy to maintain online.

(4) Power Conditions
4.1 According to the type of power supply, select AC and DC solenoid valves respectively. Generally speaking, AC power is easy to use.
4.2 AC220V and DC24V should be preferred for voltage specification.
4.3 The power supply voltage fluctuation is usually +%10%.-15% for AC, and ±%10 for DC is allowed. If it is out of tolerance, voltage stabilization measures must be taken or special order requirements must be put forward.
4.4 The rated current and power consumption should be selected according to the power supply capacity. It should be noticed that the VA value is high during AC starting, and the indirect pilot solenoid valve should be preferred when the capacity is insufficient.

(5) Control accuracy
5.1 Ordinary solenoid valve only has two positions: open and close. When the control accuracy is high and the parameters are required to be stable, please choose a multi-position solenoid valve; /1 Combination multi-function solenoid valve has four flow rates: full open, wide open, small open and full open.
5.2 Action time: refers to the time from when the electrical signal is turned on or off to the completion of the main valve action. Only the multi-function solenoid valve, a patented product of our company, can adjust the opening and closing time respectively, which can not only meet the requirements of control accuracy, but also prevent water hammer damage.
5.3 Leakage
The leakage value generally given on the sample is a common economic grade. If it is too high, please make a special order.

5. Solenoid valve maintenance
Precaution 1
For pilot-operated solenoid valves, it is necessary to check whether the pressure difference in the pipeline is too small. If the pressure difference is too small, the solenoid valve cannot work normally. In this case, a direct-acting solenoid valve is required. The pressure difference is too large, far exceeding the design value of solenoid valve, and it cannot work normally, so a high-pressure solenoid valve should be used.
Precaution 2
The solenoid valve is generally installed horizontally. If the pepper is installed on the side, it may cause the valve to not close tightly, that is, internal leakage, because try to avoid side installation.
Precaution 3
When used for a long time, if the seal between the piston and the valve seat is not good, the sealing surface of piston can be re-ground, and then ground with the valve seat.
Precaution 4
When working, noticing pressure gauges before and after the valve. It is required that the working pressure should not exceed the rated pressure, and the working pressure difference must be within the rated pressure difference range. When the working pressure exceeds the rated pressure or the working pressure difference exceeds the rated pressure difference, the solenoid valve should be stopped, and the front and rear manual valves should be closed to prevent the solenoid valve from
exploding and leaking.
Precaution 5
After the solenoid valve is installed, it is necessary to pass the medium to test several times, and then it can be used after confirming that it is normal.
Precaution 6
The dirt inside and outside the large valve and the armature suction surface should be cleaned regularly. Be careful not to damage the sealing surfaces.
Precaution 7
When the solenoid valve is not used for a long time, the manual valve in front of the valve should be closed. When it is reactivated, the steam solenoid valve should drain the condensed water, and make test actions several times, and then put it into use after the switch is normal.

For Kaolu’s solenoid valve product selection, please visit:
https://www.genndih.com/the-electromagnetic-valve.htm

Question 4

The basic knowledge and common errors and solutions of solenoid valve (2)

Accepted Answer

4. Applicability
(1) Medium characteristics

Question 5

The basic knowledge and common errors and solutions of solenoid valve (2)

Accepted Answer

(4) Power Conditions
4.1 According to the type of power supply, select AC and DC solenoid valves
respectively. Generally speaking, AC power is easy to use.
4.2 AC220V and DC24V should be preferred for voltage specification.
4.3 The power supply voltage fluctuation is usually +%10%.-15% for AC, and ±%10 for
DC is allowed. If it is out of tolerance, voltage stabilization measures must be taken
or special order requirements must be put forward.
4.4 The rated current and power consumption should be selected according to the
power supply capacity. It should be noticed that the VA value is high during AC

starting, and the indirect pilot solenoid valve should be preferred when the capacity
is insufficient.

Question 6

Why Use Proportional Pinch Valves?

Accepted Answer

See below for pressure curves representing 2-way (ON/OFF) control versus proportional control. If you need the option to vary or hold flow or pressure in your system a proportional valve allows you flexibility to adjust the valve opening from full open to closed or anywhere in between.

We hope you have enjoyed reading the article. Please remember to visit our product page.

Question 7

Advantages of Pinch Valves

Accepted Answer

Compact, lightweight design
Easy cleaning (just throw away the tubing)
Simple operation
Eliminates media contamination
Linear flow
Quick tubing change-out
High performance and reliability
Easy valve exchange
Maximize productivity
Reduced valve costs
Valve body not affected by corrosive fluids
Requires very low maintenance

We hope you have enjoyed reading the article. Please remember to visit our product page.

Question 8

Pinch Valve Markets

Accepted Answer

Biotechnology
harmaceuticals
Medical devices
Process equipment
Food and beverage
Chromatography - analyzers
Chemical processing equipment
medical equipment
lab analyzers
food manufacturing equipment

Across a variety of markets and industries, maintaining the integrity of the fluid or media passing through non-contact technology is a driving factor in choosing pinch valves. As technologies evolve, we see more and more applications that require increasingly demanding performances that are just not achievable with conventional pneumatic or solenoid pinch valves; there is a demand for proportional controls in order to regulate and monitor processes with greater accuracy, speed, and delivery. Regulation of the fluid or media is necessary and can be limited to several factors, including flow, net volume, temperature, positive or negative pressure, and viscosity.

Filtration and dispensing applications benefit immensely from proportional pinch valves. Filtration is a method used to separate particles from a fluid. Filters require precise regulation of flow, along with monitoring positive and negative pressure at the membrane as the process occurs. Material build-up as the filter does its job means that increased flow or pressure may be needed in order to maximize the filters usefullness to a maximum point.

Directly replace:
Resolution Air ( MPPV series)
IMI Norgren ( PE 900 series)

We hope you have enjoyed reading the article. Please remember to visit our product page.

Question 9

比例制御式ピンチバルブ

Accepted Answer

https://genndih.jp.taiwantrade.com

●比例制御式ピンチバルブとは？

—小型比例ピンチバルブ、もしくは比例ピンチバルブとも呼ばれます
チューブを押圧・はさむことで中を流れる気体・液体の流量コントロール
比例バルブで流量の調整を高度に実施
非接触でのコントロールが可能となりクロスコンタミリスクを低減

・私共の比例制御式ピンチバブルを使う効果は
ステッパーリニアアクチュエータと専用ピストンからなるデザインにより、バルブをより精密に比例制御することができます。

・私共では外径4mm〜38.1mmのチューブに対応した比例ピンチバルブを提供しております。
詳細はこちらをご覧ください
https://www.genndih.com/pinch-valve/proportional-pinch-valve.html
(当社ホームページ)

・比例ピンチバルブの主な用途

化学製品のミキシング/ディスペンシング
調剤システム
医療的または科学的解析
自動販売機
血液処理/解析
実験室における解析

・最適な比例ピンチバルブを選ぶには
以下をご確認ください

チューブの材質と硬度
チューブの外径と内径
内部の空気圧

Question 10

Пропорциональная шланговая задвижка

Accepted Answer

https://genndih.ru.taiwantrade.com

●Пропорциональная шланговая задвижка

・ Что такое пропорциональная шланговая задвижка?
Регулируйте скорость потока газа или жидкости путем зажатия силиконовой трубки. Возможно бесконтактное регулирование, снижающее риск перекрестного загрязнения

・ Как это работает?
Конструкция состоит из шагового линейного привода и специального поршня, обеспечивающих точное пропорциональное регулирование задвижки.

・Что мы предлагаем?
Мы предлагаем пропорциональную шланговую задвижку, совместимую с трубками внешним диаметром от 4 мм до 38,1 мм
Ознакомьтесь с нашим каталогом
https://www.genndih.com/pinch-valve/proportional-pinch-valve.html

・ Каковы основные применения пропорциональной шланговой задвижки?

Химические смеси и разливание жидкостей
Система смешения
Биотехнологическое и фармацевтическое обрабатывающее оборудование
Одноразовые системы
Обработка крови и аналитические контрольно-измерительные приборы

・ Как выбрать подходящую пропорциональную шланговую задвижку?
Пожалуйста предоставьте:

Материал и твердость трубки
Внешний и внутренний диаметр трубки
Воздушное давление внутри трубки