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.

Question 2

Gas Blending

Accepted Answer

Our QKL electronic proportional pressure regulator ( I/P converter) products help with gas blending applications that need repeatable pressure control. By controlling the pressure of each specific gas to a process, a tailored blend can be achieved. Here two QKL proportional pressure regulator ( I/P converter) are controlling the pressure of two types of media in a gas blending application. We also provide proportional flow control valve in this application.

Question 3

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.

Question 4

Glass Bottle Blow Molding

Accepted Answer

This sketch shows a QKL Electronic proportional pressure regulator ( I/P converter) piloting a volume booster in a glass bottle blow molding application. Most glass bottles are manufactured via the "press & blow" method. In this method the pressure regulator is used at the final stage to fill air into the molten glass in a mold.

Question 5

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.

Question 6

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

Question 7

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.

Question 8

Airbag Lifting

Accepted Answer

QKL electronic proportional pressure regulator( I/P converter) used to inflate air bags to raise a table. Pneumatically operated tables and lifts require air bag pressure control that is accurate and repeatable. These tables and lifts require less maintenance than conventional hydraulic lift tables, since there is no fluid to leak and contaminate processed goods.

Question 9

Welding Application

Accepted Answer

In this sketch, QKL electronic proportional pressure regulator ( I/P converter) is controlling air pressure over oil to control the pressure of the oil to the cylinder. An orifice is used on the cylinder exhaust to soften the weld tip and help control overall speed during the process.

Question 10

AODD Pump Speed Control

Accepted Answer

氣動雙隔膜（AODD）泵在許多製造工廠中泵送各種液體時，使用空氣來控制隔膜的速度。QKL 可輕鬆為大多數氣動雙隔膜速度控制。

Question 11

Steam Control

Accepted Answer

QKL electronic proportional pressure regulator ( I/P converter) assembly takes feedback from a downstream pressure transducer and closes the loop around pressure for tighter closed-loop control. Since temperature is directly related to the pressure of saturated steam, this assembly will provide tighter control of temperature.

Question 12

Air blowing

Accepted Answer

QKL electronic proportional pressure regulator ( I/P converter) is ideal for catheter blow molding because of its high repeatability and accuracy. QKL is being used to control the amount of pressure applied to shape catheter in a mold.

Technology