A manual plastic pinch valve is a type of valve that uses a manual mechanism to pinch and close a flexible plastic sleeve or tube, effectively controlling the flow of various media.
| Rubber quality | Application examples | Temperature range | Typical media |
| EPDM | Chemical applications: Applicable to 75% of all industrial chemical applications. | -40℃ – ＋110℃ | Concentrated and oxidiziing chemicals. |
| NR | High wear applications. | -40℃ – ＋80℃ | Abrasive materials, diluted acids, alkali & chemicals. |
| NBR | Applications involving oils, fats and hydrocarbon. | -30℃ – ＋100℃ | Oil, fats, fuels hydrocarbon, lubricants. |
| CR | Special-purpse chemical application: Resilient to ozone and averse weather | -40℃ – ＋100℃ | Chemicals, acids, several solvents, aliphatic oils, fats, lubricants |
| IIR | Special-purpse chemical application: Impermeable to gas | -40℃ – ＋100℃ | Concentrated and acidic chemicals, vegetable oil. |
| Name | Material |
| Body | Aluminium alloy, Cast iron, Cast steel, Stainless steel |
| Sleeve | NR, EPDM, NBR, CR, IIR |
| Stem | Carbon steel, Stainless steel, Alloy steel |
| Pinch rod | Ductile iron |
| Side guide rod | Carbon steel, Stainless steel, |
| Hand wheel | Cast iron |
| Acceptable other special requirements of the material | |
Main dimension (mm)
| DN | PN(Bar) | L | L1 | L0 | D | D1 | Z-ɸ | D0 | H |
| 25 | 1-16 | 145 | 124 | 31 | 115 | 85 | 4-14 | 120 | 150 |
| 32 | 1-16 | 160 | 145 | 40 | 135 | 100 | 4-18 | 140 | 174 |
| 40 | 1-16 | 180 | 157 | 50 | 145 | 110 | 4-18 | 140 | 186 |
| 50 | 1-16 | 210 | 160 | 60 | 160 | 125 | 4-18 | 160 | 205 |
| 65 | 1-16 | 250 | 199 | 74 | 180 | 145 | 4-18 | 160 | 238 |
| 80 | 1-16 | 300 | 222 | 88 | 195 | 160 | 4-18 | 200 | 241 |
| 100 | 1-16 | 350 | 250 | 106 | 215 | 180 | 8-18 | 240 | 301 |
| 125 | 1-10 | 430 | 318 | 134 | 245 | 210 | 8-18 | 280 | 360 |
| 150 | 1-10 | 500 | 350 | 158 | 280 | 240 | 8-23 | 320 | 405 |
| 200 | 1-6 | 645 | 446 | 206 | 335 | 295 | 8-23 | 560 | 545 |
| 250 | 1-6 | 800 | 516 | 256 | 395 | 350 | 12-23 | 560 | 632 |
| 300 | 1-4 | 940 | 562 | 304 | 440 | 400 | 12-23 | 620 | 741 |
| 350 | 1-4 | 840 | 500 | 460 | 16-23 | 700 | |||
| 400 | 1-4 | 915 | 580 | 525 | 16-25 | 750 |
The main components of a manual plastic pinch valve include the valve body, rubber sleeve, pinch bars, valve stem, handwheel, side rods, and pressure plates. These parts work together to control fluid flow by compressing or releasing the rubber sleeve through the rotation of the handwheel.
The manual pinch valve functions as an on/off and throttling control device. Its straight-through design allows for unrestricted flow and minimal pressure drop. It effectively manages flow between 10% and 95% of its rated capacity. The valve is low-maintenance, lightweight, and simple to operate, with easy rubber sleeve replacement and no need for additional spare parts.
The manual pinch valve functions by rotating the handwheel, which drives the valve stem to move pinch bars that compress or release the rubber sleeve, thereby controlling the fluid flow. Turning the handwheel clockwise closes the valve, while counterclockwise opens it. The pinch bars are guided by side rods and ensure an effective seal by directly compressing the sleeve. Suitable for pressures between 3 and 40 Bar, the valve supports various materials and fluids. It can be installed in any pipeline position without flow direction constraints, and maintenance is minimal, involving only the replacement of the rubber sleeve.
Installation: Can be fitted in any section of the pipeline, with no restrictions on flow direction.
Maintenance: Requires minimal upkeep. Only the rubber sleeve needs periodic replacement. No need to replace valve seats or sealing materials.
Solid body and resilient rubber sleeve with essential components, including stem, pinch rod, and handwheel.
Handwheel mechanism allows simple control: clockwise to close, counterclockwise to open, with no extra tools required.
Compatible with various rubber sleeves (EPDM, NR, NBR, CR, IIR) for handling a wide range of materials and temperatures from -40℃ to +110℃.
Only the rubber sleeve needs periodic replacement, which can be done without special tools, keeping maintenance costs low.
Straight-through design ensures high flow rates with minimal pressure drop and prevents blockages, even with solid particles.
Can be installed anywhere in the pipeline with no restrictions on flow direction, offering integration flexibility.
Designed to reduce wear and corrosion, making it suitable for demanding environments like chemical processing and water treatment.
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