Benefits of Different Pinch Valve Types - AUTOMATIC VALVE

09 Sep.,2024

 

Benefits of Different Pinch Valve Types - AUTOMATIC VALVE

Pinch valves are ideal for various slurry control applications due to their versatility, flexibility. And ability to handle corrosive and abrasive slurries. Pinch valves are available in different types, including air-operated, manual, hydraulic, electric, manual override, and solenoid pinch valves. Each of these types has its unique features and benefits, which make them suitable for different slurry applications. In this blog post, we will explore the benefits of each type of pinch valve. So you can decide which one is most suitable for your application. Let&#;s dive in and take a closer look at the advantages of different types of pinch valves.

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I. Air-Operated Pinch Valve

Pinch valves known for their flexibility, durability, and versatility to handle different slurry applications. Air operated pinch valve offer several benefits. Including precise slurry flow regulation, resistance to abrasion and corrosion, minimal maintenance. And no contact between the slurry and internal valve components, which reduces contamination risks. In this section, we will take a more in-depth look at the advantages of the air-operated pinch valve. And learn more about its features and applications.

Minimal maintenance required due to its simple design

An pneumatic pinch valve has several benefits, one being the minimal maintenance required due to its simple design. Since it has no internal moving parts, there is no chance of wear and tear. It makes the valve&#;s maintenance less costly and infrequent. The valve operates by compressing the rubber sleeve to control the flow of the slurry. It requires minimal adjustment or maintenance. This simplicity of design ensures that the valve is efficient in controlling. The flow of the slurry while minimizing downtime and maintenance costs.

No contact between the slurry and internal valve components, reducing the risk of contamination

Another advantage of the air-operated pinch valve is that there is no contact between the slurry and internal valve components, reducing the risk of contamination. The valve sleeve compresses the slurry and creates a seal between the inlet and outlet. As a result, there is minimal chance of cross-contamination, ensuring that the slurry remains pure. The valve&#;s simple design eliminates the need for seals and other internal components that can corrode or contaminate the slurry. By preventing contamination, the air-operated pinch valve provides a reliable solution for slurry control. In industries, purity is crucial, such as the food and beverage industry.

Ability to control the slurry flow precisely

An air-operated pinch valve offers precise control over slurry flow, making it ideal for various applications. The valve sleeve, which is made of rubber, is compressed to control the slurry&#;s flow through the pipe. The valve&#;s ability to control slurry flow precisely is due to the close tolerances. It between the valve sleeve and the body. By adjusting the air pressure, you can regulate the amount of compression on the valve sleeve. It controls the flow of the slurry through the valve. The valve&#;s precise flow control ensures that the slurry is delivered at a consistent rate. It reduces production waste and improves process efficiency.

Resistance to abrasion and corrosion

The air-operated pinch valve is resistant to abrasion and corrosion, thanks to its simple yet robust design. The valve&#;s rubber sleeve is highly resistant to abrasion from slurry and other abrasive materials. It reduces the risk of valve wear and failure. Additionally, the valve&#;s body is typically made of materials that can resist corrosion from chemicals and other corrosive materials. This resistance to abrasion and corrosion extends the valve&#;s lifespan while providing reliable performance in harsh environments. With its durability, the air-operated pinch valve is an ideal solution. For slurry control applications in the mining and chemical industries, where abrasive and corrosive materials are commonly transported.

II. Manual Pinch Valve

Manual pinch valve are operated by hand to regulate slurry flow. These valves are highly versatile, and their simplicity makes them ideal for use in various industrial applications. Manual pinch valves offer a range of benefits. It includes the ability to adapt to different flow rates and slurry viscosities, customizable sleeve options, and minimal maintenance requirements. This section will examine the manual pinch valve&#;s benefits. And how this valve type performs in different slurry control applications.

No external power supply required

One of the critical benefits of manual pinch valves is that they do not require an external power supply. The valve is operated manually by applying pressure to the valve&#;s body or handwheel. It compresses the rubber sleeve and regulates the slurry&#;s flow. This feature makes manual pinch valves ideal for remote locations or areas with limited access to electricity. Additionally, manual pinch valves can use as backup valves in case of power outages. It ensures that the slurry flow remains uninterrupted. The absence of external power supply requirements also makes manual pinch valves a more cost-effective solution for slurry control applications.

Versatility and flexibility in adapting to different flow rates and slurry viscosities

Manual pinch valves offer versatility and flexibility in adapting to different flow rates and slurry viscosities. It makes them ideal for different slurry control applications. The valve&#;s rubber sleeve can be customized to handle various slurry compositions, ranging from low to high concentrations of solids. The valve&#;s simple yet efficient design allows for easy adjustments to adapt to different flow rates and slurry viscosities. Manual pinch valves are also available in different sizes and configurations to fit different pipe diameters and fluid flow rates. This versatility and flexibility make manual pinch valves an excellent solution for slurry control applications in industries. Such as food and beverage, chemical processing, and mining.

Minimal maintenance required due to its simple design

Manual pinch valves have a simple design that results in minimal maintenance requirements. The valve is composed of a body and a rubber sleeve that can be easily replaced. There are no complex components or external parts that require regular maintenance or repair, reducing downtime and costs. Additionally, manual pinch valves do not require any additional lubrication or cleaning. It makes them a low-maintenance solution for slurry control applications. Thanks to their simple design, manual pinch valves provide reliable slurry flow regulation with minimal maintenance. It makes them the preferred choice in various industries. Such as wastewater treatment, pharmaceutical, and pulp and paper.

III. Electric Pinch Valve

Electric pinch valves are a popular type of control valve that provides precise and efficient slurry flow regulation. These valves operate by an electric motor. They actuates to compress the valve sleeve, controlling the slurry flow through the pipe. Electric pinch valves offer several advantages. Including accurate flow control, reduced energy consumption, and remote control capabilities. In this section, we will take a closer look at the benefits of electric pinch valves. And how they can use in various industrial applications.

Precise flow control with minimal manual adjustments

Electric pinch valves offer precise flow control with minimal manual adjustments, making them ideal for automation in various industrial applications. The valve&#;s electric motor allows for accurate and repeatable positioning of the valve sleeve. It results in more precise slurry flow control. This feature also reduces the chances of over-compressing or under-compressing the valve sleeve, minimizing errors in the slurry flow regulation. Compared to manual pinch valves, electric pinch valves can provide greater regulation accuracy, improve process efficiency, and reduce waste. Additionally, electric pinch valves can easily integrate into process control systems. It allows for remote operation and monitoring of the valve&#;s performance without the need for on-site personnel.  Electric valve

Customizable sleeve options to handle different slurry types and concentrations

Electric pinch valves offer customizable sleeve options that can handle different slurry types and concentrations. The valve&#;s rubber sleeve provides the primary separation barrier between the slurry and the internal valve components. Electric pinch valves can accommodate various sleeve materials, including natural and synthetic rubbers, silicone, and fluoropolymers. Different sleeve durometers and thicknesses can also use to handle different slurry compositions. It includes low to high concentrations of solids and corrosive materials. With customizable sleeve options, electric pinch valves provide flexible slurry control solutions for different industrial applications such as chemical processing, mining, and wastewater treatment.

Pinch Valves Manufacturer | THINKTANK

Pinch Valves are suitable for isolating and controlling abrasive, corrosive, and fibrous materials. The pinch valve is increasingly being utilized as an isolating valve or modulating valve for powder, sludges, dust, emulsions, gaseous materials, granulates, pellets, and other similar materials.

What Is A Pinch Valve?

The pinch valve is a unique type of valve with a distinct construction that is well-known for its excellent wear and corrosion resistance and is ideal for controlling the transmission of granular slurry or chemical media in low-pressure pipes. 

Because of the pinch valve&#;s outstanding corrosion resistance, wear resistance, sealing performance, and extended service life of the valve body, the sleeves of the pinch valve could be replaced on a regular basis, saving expenses and producing superior economic advantages for users.

Pinch valves can replace gate valves, ball valves, globe valves, diaphragm valves, slurry valves, and other stainless steel valves, saving costs while increasing service life by 5-10 times.

The pinch valve substitutes the stainless steel clamp and can be used to continue excellent working normally in an acid corrosion environment inside and outside. This valve is extensively used in pulp, sewage, slag, cinder, sediment, and other work conditions, and it can quickly control the flow volume and turn off the pipeline.

Based on the different drives for pinch valves, we can categorize three types of pinch valves.

Manual-operated pinch valves are powered by a handwheel.

manual pinch valves

Air-operated pinch valves are powered by compressed air.

air operated pinch valves

Electric-operated pinch valves are powered by electric power, like 24V.DC, 220V.AC, or 380V.AC.

electric operated pinch valve

What Is A Pinch Valve Used For?

When solid or liquid goods comprising particles, powder, fiber, slurry, and other abrasive substances are delivered via pipelines, or when chemical procedures with corrosive media are used, the pinch valve is the ideal choice. So simply say a pinch valve is used for the transport of particles, powders, fibers, slurries, or corrosive media in the pipeline.

Pinch valves are commonly used in wastewater treatment plants (sludge treatment, gravel cleaning, raw sewage, lime, carbon sludge), power plants (FGD systems, ash removal systems, coal conveying), mining (tailings, flotation control, sludge discharge lines, tailings filling, various other slurries) chemical processes (corrosive and abrasive media, powders, particles) and paper mills, food industry, pulp mills, glass, electronics industry, cement industry, sand,  and industrial wastewater treatment plants and many other fields.

What Are The Advantages of Pinch Valves?

Pinch valves are also referred to as squeeze valves, rubber liner valves, rubber tube valves, air sleeve valves, clamp-off valves, and so on. The inner sleeve is the most important part of the pinch valve, as it can withstand corrosion, wear, and capable pressure. The quality of the pinch valve is determined by the quality of the rubber sleeve. The inner sleeve is squeezed by a pneumatic, electric, manual or hydraulic actuator to achieve the switching/regulating function.

The Features of Pinch Valves

  • Full diameter, no obstruction of the flow path
  • Low flow resistance
  • No blocking
  • When there are residual particles, the valve can still be closed with zero leakage
  • No gaps and dead zones to prevent valve operation
  • Low maintenance cost
  • Simple design, not affected by the harsh external environment

Pinch valve, also known as rubber sleeve valve, is widely used in smelting, mining, electric power, chemical, food, brewing, and other sectors because the inner section of the valve uses a rubber sleeve, which improves tightness, corrosion resistance, and wears resistance.

The Main Advantages of the Pinch Valves

1. Scientific Design

Low flow resistance, non-blocking, no gaps, and dead zone to prevent valve operation, even if the medium contains residual particles, the rubber sleeve still can wrap it all, and to achieve zero leakage when valve shutoff.

2. Easy to Control

You can be on-site or across a distance for automated remote control, and it can be controlled according to their individual requirements.

3. High Resistance to Wear and Corrosion

Rubber is significantly more wear-resistant than steel, iron, and other metal components, and composition adjustments can avoid the corrosion of various chemical fluids, which makes it particularly ideal for pipeline transit management of granular slurry and chemical media.

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4. Excellent Sealing

When the valve is coupled to the pipeline, no extra sealing gasket is required, the valve path and the control medium space are completely isolated, ensuring that there will never be internal and external leakage. 

5. Excellent Cold Resistance Performance

As the fluid medium in the flexible tube flow, fluid crystallization caused by shell frost cracking and other problems is avoided.

6. Simple Installation and Use

In the process of valve installation, The valve can be installed in both directions, so there is no confusion about the flow direction.

7. Quick Maintenance

If the sleeve of the pinch valve is discovered to be broken, the structure can enable quick sleeve replacement, simple maintenance, and simple operation.

8. Long Service Life

THINKTANK&#;s pinch valve has a high-quality rubber sleeve with reinforced fabric, so it can withstand any high-frequency opening and closing operation.

9. Low Costs

All sleeve types can be replaced quickly and easily with instruction and without additional tools. So it has extremely low operation and maintenance costs.

How Does Manual Pinch Valve Work?

Pinch Shutoff Valves have been shown to be the most reliable choice for bulk handling and product transporting.

A manual pinch valve is controlled by a mechanical device and a handwheel operator. The mechanism is made up of one or two clamping rods that are horizontally positioned above and below the sleeve and are directed by two rods on the sides. The handwheel mechanism then activates the mechanism, which closes and opens the valve.

How Does The Pneumatic Pinch Valve Work?

When there is no compressed air input, the cavity between the sleeve and the valve body is connected to the atmosphere, and the fluid pressure tensions the sleeve outward. Because the increased curtain cloth layer is arranged at a certain angle within the sleeve, the axial and radial pressures of the sleeve balance each other, and the length and diameter of the sleeve do not change related to fluid pressure. The sleeve deforms under air pressure and intercepts the flow when the air source enters the cavity between the sleeve and the valve body.

A differential pressure of 2-3 bar between the air supply pressure and the working pressure then the pneumatic pinch valve closed (the differential pressure value depends on the composition of the sleeve). Because of its high resilience, the pinch valve liner fully opens when the air source is interrupted and the pinch valve body is vented. 

THINKTANK Pinch Valves are Useful for a Variety of Reasons

  • There are no dead zones or obstructions in the valve.
  • Even with solids, still has 100% tight sealing and shut off without any leakage.
  • The most lightweight valve on the market.
  • A body with an elliptical form consumes less air.
  • Service lifetimes that are unequaled
  • There are no mechanical parts which mean outstanding total cost of end-user
  • Reinforced rubber sleeves for abrasive media
  • Quick closing times
  • Available in stock
  • Simple maintenance

What are the Primary Factors Influencing Pinch Valve Quality?

Pinch valve is consist of four components: valve body, sleeve, opening and closing mechanism, and driving device.

The sleeve is the key to the quality of the pinch valve, and the major variables influencing its quality are raw materials, rubber synthesis formula, processing technology, sleeve thickness, and wear-resistant anti-corrosion layer uniformity.

the sleeve of pinch valve

The following are the 5 reasons for pinch valve quality issues.

  1. Insufficient natural raw rubber content and excessive regenerated rubber, which cause rubber loss, significant wear & tear, and short service life.
  2. Incorrect rubber composition causes poor wear resistance, and acid & alkali resistance.
  3. The sleeve manufacturing method impacts the quality of the valve; the molded rubber sleeve wear layer is prone to uneven thickness, resulting in thin areas that are easily broken. To provide a wear-resistant layer, a pure handmade rubber sleeve is used, and the thickness of the sandwich layer is consistent. The useful life has significantly enhanced.
  4. Rust on the valve body, and damage to the opening and closing mechanisms, cause the valve to shut too tightly or not completely close, resulting in unsatisfactory valve usage.
  5. Power sources such as pneumatic and electric actuators. THINKTANK is an independent research and development manufacturer of pneumatic actuators to satisfy the torque of pinch valves with a CE certificate.
manual pinch valve openmanual pinch valve close

Pinch valves are ideal valves for fluids containing solid particles or contaminants to isolate and regulate pipelines. Because the sleeve is the only part in touch with the medium, it is extremely resistant to wear and corrosion. Even if complicated chemical processes are occurring in the pipeline, the pinch valve is still easy to handle them. Its applications include power plants, sewage treatment plants, mining, and chemical process control.

Parts of Manual Pinch Valves

components of manual pinch valveNoPart NameNoPart NameNoPart Name1Protective Cover8Sleeve15Bolt2Retaining Ring9Lower Body16Upper Pinch Bar3Handwheel10Nut17Side Guide4Stem11Gasket18Block5Stem Nut12Bracket19Lower Pinch Bar6Centre Bushing13Thrust Bearing20Nut7Upper Body14Upper Guide Bushing21Lower Guide Bushing

Specifications

  • Body Material: Cast Iron, Cast Steel, Aluminium
  • Size: DN25 to DN
  • Nominal Pressure: PN16
  • Valve Type: Straight Through
  • Max. Working Pressure: 2.5MPa
  • Max. Shutoff Differential Pressure: 0.25MPa
  • Full Travel Loading Time(Open to Close): &#;3S
  • Effective Diameter: 25 to mm
  • Leakage Class: IV. (Refer to standard API598)
  • Connection Type: Flange

Dimension of Pinch Valves

Valve SizePN(Bar)ABCWeight/Kg (Pneumatic Pinch Valve)Weight(Manual Pinch Valve)251-----------

Application

Power Plant
  • FGD System
  • Coal Conveying Device
  • Scrubbing System
  • Fly Ash Control
Chemical Process Control
  • Corrosive and Abrasive Material
  • Powder
  • Particle
  • Waste Treatment
Sewage Treatment Plant
  • Sludge Control
  • Sand Removal
  • Raw Sewage
  • Lime, Carbon Slime
Mining Plant
  • Tailing Disposal
  • Flotation Control
  • Multiple Mud Control
  • Dredge Pipeline

Which Benefits Will You Get If Buy Pinch Valves From THINKTANK?

&#; High Wear and Corrosion Resistance

Our pinch valves can handle all types of medium concentration acid and arbitrary concentration alkali salt solution, and these pinch valves can carry pulp, dry and wet powder, and crystalline material medium.

&#; Complete Diameter

When the pinch valve is open, its overall design may be totally integrated with the pipeline system; it won&#;t modify the pipe&#;s diameter or structure and has no impact on the pipeline&#;s flow medium.

&#; Can be Closed with Particles

Because the pinch valves are self-cleaning, any particles that accumulate in the sleeve wall are broken away when the valve is activated. This is attributed to the sleeve&#;s flexibility, which allows the valve to last longer than many rival products currently on the market.

&#; There is No Leakage.

When the valve is coupled to the pipe, the flow path and control medium space are entirely separated, and there will never be internal and external leakage, therefore eliminating running, risk, drop, leakage, and so on.

&#; Low Maintenance Costs

Pinch valves do not have seats, packing, rings, or telescopic tubes that need to be replaced on a regular basis. Only the sleeve needs to be replaced. The valve will be as good as new when the sleeve is changed.

The solution for isolating, controlling, and metering abrasive, corrosive, and fibrous goods such as granulates, powder, pellets, dust, and liquids containing solids, among others.

air operated pinch valves

Sleeve Materials For Pinch Valves

Sleeve Material Suitable TemperatureTypical MediumApplicationSBRT
Styrene Butadiene,
Flowrox Blend&#;-40°C  to +110°CAbrasive materials, diluted acid, alkali and chemical applicationsHeavy wearing
High cycle frequencyEPDM
Ethylene Propylene40°C to +120°CConcentrated and oxidizing chemicalsChemical applications
&#; Applicable to 75% of all
industrial chemical applicationsNBR
Nitrile Rubber-30°C to +100°COils, fats, fuels, hydrocarbon, lubricantsApplications involving oils, fats
and hydrocarbonNR
Natural Rubber
&#;-50°C to +75°CAbrasive materials, diluted acids, alkali a chemicalsHigh wear applications
HNBR
Hydrogenated
Nitrile-30°C to +160°COils, fats, fuels hydrocarbon, lubricantsHigh temperature applicationsNRF
Natural Rubber
Foodstuff Quality
White inner lining-40°C to +75°CMedia used in food and other CIP (clean-in-place) processes, alcoholFoodstuff applications
-Fulfils FDA Food and Drug Administration) requirementsNBRF
Nitrile Rubber
White inner lining-30°C to +100°CVegetable and animal oils and fatsApplications involving fatty foodstuff
-Fulfls FDA (Food and Drug Administration) requirementsEPDM/B
Ethylene Propylene, Blend-40°C to +100°CGreen liquor, alkaline and extraneous matter in green
liquor processesPulp and paper industry&#;s
green liquor applicationCR
Chloroprene Rubber-40°C  to +100°CChemicals, acids, several solvents, aliphatic oils, fats,
lubricantsSpecial-purpose chemical applications
-Resilient to ozone and averse
weather FPM
Fluorine Rubber
(Viton&#;)-20°C to +120°CChemicals, aliphatic oils, aromatic and halogenated hydrocarbon Special-purpose chemical applications
-Resilient to ozone and averse weatherCSM
Chloro-sulphone-ethylene(Hypalon@)-40°C to +100°CChemicals, acids, several solvents, aliphatic oils, fats, lubricantsSpecial-purpose chemical applications
-Resilient to ozone and averse weather
IIR
Butyl-40°C to +100°CConcentrated and acidic chemicals, vegetable oilsSpecial-purpose chemical applications
-Impermeable to gas
PU
Polyurethane with
PU lining-10°C to +80°CAbrasive materials, diluted chemicals, hydrocarbon, oils, lubricantsAbrasive media applications

Different Flange Types of Pneumatic/Air-Operated Pinch Valves

Different Flanged Ends Types

a. Aluminum Flange

b. Aluminum Flange with Stainless Stel Bushing

c. Aluminum Flange with Internal Threaded

d. Aluminum Flange with Flange Sleeve

Dimensions of Flanged Ends

DN(mm)D1DADFnB
(number of holes)ΦdΦTKLGHEPS Max. (Bar)G1
(Internal Threaded)
GTG1/4&#;G11/2&#;G1/4&#;G2&#;G1/4&#;G21/2&#;G1/4&#;G3&#;G1/4&#;G4&#;G1/4&#;&#;&#;G1/4&#;&#;&#;G3/8&#;&#;&#;G1/2&#;&#;&#;G1/2&#;&#;&#;pneumatic pinch valves factory

Threaded Ends Dimension of Pneumatic/Air-Operated Pinch Valves

DIN EN ISO 228 &#;G&#; or ANSI/ASME BI.20.1 &#;NPT&#;DN(mm)D1D2IGGTL1L2GHG3/8&#;G1/8&#;G1/2&#;G1/8&#;G3/4&#;G1/8&#;G1&#;G1/8&#;G11/4&#;G1/4&#;G11/2&#;G1/4&#;G2&#;G1/4&#;G21/2&#;G1/4&#;G3&#;G1/4&#;G4&#;G1/4&#;107Pneumatic Pinch Valves Manufacturer THINKTANK

The only difference between the air-operated pinch valve and the electric-operated pinch valve is the type of actuator or power that is utilized. Our pinch valves are used in applications ranging from dirty abrasive industrial slurries and powders to sanitary-grade food and pharmaceuticals.

In Conclusion

Now we know the sleeve is the key point to influence the quality of pinch valves, our pinch valves are used in applications from dirty abrasive industrial slurries and powders to sanitary-grade food and pharmaceuticals with good quality. Please do not hesitate to contact us if you have any questions.

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