Pinch Valves Air Valves
Description
Pinch valves are a type of valve that controls the flow of media through a flexible tube. The valve operates by pinching the tube to stop or regulate the flow, ensuring a straight flow passage without crevices or moving parts. This design allows the valve to seal around trapped solids and handle various types of media, including slurries and solids, without clogging.
Working Principle
Pinch valves work by applying mechanical or fluid pressure to a flexible tube, pinching it to control the flow of media. The absence of internal obstructions results in a low-pressure drop, making them efficient for controlling the flow of abrasives and corrosives. The valve's design isolates the moving parts from the media, preventing contamination and ensuring durability. This makes pinch valves particularly useful in applications where maintaining a clean and unobstructed flow path is critical.
Applications
Pinch valves are widely used in industries such as smelting, mining, electric power, chemical processing, food, and brewing. They are particularly effective in handling slurries, sand-entrained water systems, sewage treatment, and process food applications. The ability to handle abrasive and corrosive fluids without metal contamination makes them ideal for these environments.
Advantages over other Air Valves
Pinch valves offer several advantages over other types of air valves. They have a simple design with low flow resistance and no dead zones, preventing blockages even with media containing residual particles. The rubber sleeve provides excellent wear and corrosion resistance, ensuring zero leakage when the valve is shut off. Additionally, pinch valves are cost-effective, with low operation and maintenance costs due to the ease of sleeve replacement and minimal need for additional tools.
Limitations
One limitation of pinch valves is the requirement for a stroke equivalent to at least the bore of the tube to function effectively from fully open to fully closed. This can restrict flow, especially in larger tubes, and should be considered when sizing valves for specific applications.
Considerations
When considering pinch valves, it is important to evaluate initial costs, operating expenses, and maintenance requirements. The simple design and ease of sleeve replacement contribute to low maintenance costs. However, the durability and accuracy of the valve depend on the quality of the rubber sleeve and the specific application conditions. Proper sizing and material selection are crucial to ensure optimal performance and longevity.
from DeZURIK, Inc.
Manufactured on the same design principles as Red Valve ’s Type A Valve, Series 2600 Miniflex Valves are the simplest and least expensive control valves available to industry today. The Series 2600 is designed with threaded end connections, enabling use on small lines (1/8 ”-2 ”). [See More]
- Valve Type: Pinch
from Clippard
The Clippard NPV Series Pinch Valve is a solenoid-operated device that is designed to open and close tubes for controlling flow of liquids and gases. Other valve types have internal passages that may cause small amounts of fluid to remain in the valve. Pinch valves have no areas or dead volume where... [See More]
- Valve Type: Pinch; Solenoid
- Actuation: Electric
- Maximum Pressure: 30.00
from DeZURIK, Inc.
The Series 4700 Spun Aluminum Pinch Valve is designed for low pressure service, in control or on/off applications. The Series 4700 is similar to the Type A, but the body is constructed entirely of spun aluminum for weight savings and easy installation. The air actuated Series 4700 is ideal for OEM... [See More]
- Valve Type: Pinch
from Clippard
The NPV Series Pinch Valve is a solenoid-operated device that is designed to open and close tubes for controlling flow of liquids and gases. Other valve types have internal passages that may cause small amounts of fluid to remain in the valve. Pinch valves have no areas or dead volume where fluid... [See More]
- Valve Type: Pinch; Solenoid
- Connection Description: Tube Fitting; Medical: 0.065" OD; 3/32" OD; 1/8" OD; 3/16" OD; 1/4" OD; 5/16" OD; 3/8" OD; Food Grade: 1/8" OD; 1/4" OD; 3/8" OD
- Maximum Pressure: 30.00
- Actuation: Electric
from DeZURIK, Inc.
Introduced and patented by Red Valve, the air -actuated Type A Pinch Valve offers a unique, cost-effective solution to flow control problems. More Red Valve Type A Valves are in use than any other Pinch Valve throughout the world. The secret is in the rubber sleeve - the valve ’s only wetted... [See More]
- Valve Type: Pinch
from Clippard
Clippard ’s NPP Series 2-Way pneumatic pinch valves are air-piloted devices designed to open or close tubes for controlling flow of liquids and gases. Other valve types have internal passages that may cause small amounts of fluid to remain in the valve. Pinch valves have no areas or dead... [See More]
- Valve Type: Pinch; Solenoid
- Media Temperature: 32 to 230
- Maximum Pressure: 250.00
- Actuation: Pneumatic
from DeZURIK, Inc.
The Type A Megaflex is the most economical large-diameter automatic valve available. The Type A Megaflex Valve, available in sizes 20 ” to 84 ”, is extremely simple in design and principle. As with every Red Valve Pinch Valve, the elastomer sleeve is the only wearing part, drastically... [See More]
- Valve Type: Pinch
from DeZURIK, Inc.
Red Valve ’s all new Type R all-elastomer pinch valve is an ideal valve for water, chemical, solids and slurry applications. The valve is easily installed between two pieces of pipe with hose clamps. Simply add 20 psi air pressure over line pressure and the valve closes drop tight. For example... [See More]
- Valve Type: Pinch
from IMI Bimba
Base/panel mount ready & accommodates flexible tubing size ranges up to 1.000 ” outer diameter (OD), with durometer hardness rating between 50-70 Shore A. It comes with a snap in retention tubing slot for quick loading/exchange procedures. [See More]
- Valve Type: Pinch
- Connection Description: Tube Fitting; Accomodates tubing from .125 - 1.625 inch OD
- Maximum Pressure: 125.00
- Actuation: Pneumatic
from Acro Associates, Inc.
Acro's Intelivalve ™ solenoid pinch valve line offers unmatched innovation in performance and reliability. These valves come featured with adaptive power management, valve state sensing, tube detection, noise reduction and built in data monitoring all in a compact format making them the... [See More]
- Valve Type: Pinch; Solenoid; Control Valve
- Maximum Pressure: 30.00
- Valve Size: 0.06 to 0.12
- Connection Description: Tube Fitting
from IMI Bimba
Supports tubing or disposable membrane bags ranging up to 0.375 inch OD or 3.2 – 9.5 mm sizing and average Durometer up to 60 Shore A and 15 psi media pressure. Several different configurations are available being single-tube normally open, single-tube normally closed, dual tubes toggling... [See More]
- Valve Type: Pinch; Solenoid
- Actuation: Electric
- Connection Description: Accomodates tubing from .063 - .375 inch OD
from Acro Associates, Inc.
Product Features and Benefits. Precision performance and reliability. Strong linear pinch forces and extended duty cycles into the million plus cycle rates. Flexibility in tubing selection – supports tubing ranges from 0.125" – 1.000" and up to 70 Durometer Shore A flexible tubing. Built... [See More]
- Valve Type: Pinch; Control Valve
- Maximum Pressure: 30.00 to 125.00
- Valve Size: 0.12 to 0.25
- Connection Description: Tube Fitting
from Acro Associates, Inc.
Product Features and Benefits. Precision performance and reliability. Strong linear pinch forces and extended duty cycles into the million plus cycle rates. Flexibility in tubing selection – supports tubing ranges from 0.125" – 1.000" and up to 70 Durometer Shore A flexible tubing. Built... [See More]
- Valve Type: Pinch; Control Valve
- Maximum Pressure: 65.00 to 125.00
- Valve Size: 0.25 to 0.38
- Connection Description: Tube Fitting
from Acro Associates, Inc.
Product Features and Benefits. Precision performance and reliability. Strong linear pinch forces and extended duty cycles into the million plus cycle rates. Flexibility in tubing selection – supports tubing ranges from 0.125" – 1.000" and up to 70 Durometer Shore A flexible tubing. Built... [See More]
- Valve Type: Pinch; Control Valve
- Maximum Pressure: 65.00 to 125.00
- Valve Size: 0.50 to 0.75
- Connection Description: Tube Fitting
from Acro Associates, Inc.
Product Features and Benefits. Precision performance and reliability. Strong linear pinch forces and extended duty cycles into the million plus cycle rates. Flexibility in tubing selection – supports tubing ranges from 0.125" – 1.000" and up to 70 Durometer Shore A flexible tubing. Built... [See More]
- Valve Type: Pinch; Control Valve
- Maximum Pressure: 65.00 to 125.00
- Valve Size: 0.75 to 1.00
- Connection Description: Tube Fitting
from Acro Associates, Inc.
Precision performance and reliability. Up to 30 milli second actuation times between states and high hundreds of thousands to million cycle rates. Flexibility in tubing selection – supports tubing ranges from 0.125" – 0.375" and up to 70 Durometer Shore A flexible tubing. Built in,... [See More]
- Valve Type: Pinch; Solenoid; Control Valve
- Connection Description: Tube Fitting
- Valve Size: 0.12 to 0.25
- Actuation: Electric