Description
Specifications
- Body Material: Cast Iron, Cast Steel, Aluminium
- Size: DN25 to DN1000
- 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 1000mm
- Leakage Class: IV. (Refer to standard API598)
- Connection Type: Flange
Sleeve Materials For Pinch Valves
Sleeve Material | Suitable Temperature | Typical Medium | Application |
SBRT Styrene Butadiene, Flowrox Blend |
‘-40°C to +110°C | Abrasive materials, diluted acid, alkali and chemical applications | Heavy wearing High cycle frequency |
EPDM Ethylene Propylene |
40°C to +120°C | Concentrated and oxidizing chemicals | Chemical applications – Applicable to 75% of all industrial chemical applications |
NBR Nitrile Rubber |
-30°C to +100°C | Oils, fats, fuels, hydrocarbon, lubricants | Applications involving oils, fats and hydrocarbon |
NR Natural Rubber |
‘-50°C to +75°C | Abrasive materials, diluted acids, alkali a chemicals | High wear applications |
HNBR Hydrogenated Nitrile |
-30°C to +160°C | Oils, fats, fuels hydrocarbon, lubricants | High temperature applications |
NRF Natural Rubber Foodstuff Quality White inner lining |
-40°C to +75°C | Media used in food and other CIP (clean-in-place) processes, alcohol | Foodstuff applications -Fulfils FDA Food and Drug Administration) requirements |
NBRF Nitrile Rubber White inner lining |
-30°C to +100°C | Vegetable and animal oils and fats | Applications involving fatty foodstuff -Fulfls FDA (Food and Drug Administration) requirements |
EPDM/B Ethylene Propylene, Blend |
-40°C to +100°C | Green liquor, alkaline and extraneous matter in green liquor processes |
Pulp and paper industry’s green liquor application |
CR Chloroprene Rubber |
-40°C to +100°C | Chemicals, acids, several solvents, aliphatic oils, fats, lubricants |
Special-purpose chemical applications -Resilient to ozone and averse weather |
FPM Fluorine Rubber (Viton⑧) |
-20°C to +120°C | Chemicals, aliphatic oils, aromatic and halogenated hydrocarbon | Special-purpose chemical applications -Resilient to ozone and averse weather |
CSM Chloro-sulphone-ethylene(Hypalon@) |
-40°C to +100°C | Chemicals, acids, several solvents, aliphatic oils, fats, lubricants | Special-purpose chemical applications -Resilient to ozone and averse weather |
IIR Butyl |
-40°C to +100°C | Concentrated and acidic chemicals, vegetable oils | Special-purpose chemical applications -Impermeable to gas |
PU Polyurethane with PU lining |
-10°C to +80°C | Abrasive materials, diluted chemicals, hydrocarbon, oils, lubricants | Abrasive media applications |
Parts of Manual Pinch Valves
No | Part Name | No | Part Name | No | Part Name |
1 | Protective Cover | 8 | Sleeve | 15 | Bolt |
2 | Retaining Ring | 9 | Lower Body | 16 | Upper Pinch Bar |
3 | Handwheel | 10 | Nut | 17 | Side Guide |
4 | Stem | 11 | Gasket | 18 | Block |
5 | Stem Nut | 12 | Bracket | 19 | Lower Pinch Bar |
6 | Centre Bushing | 13 | Thrust Bearing | 20 | Nut |
7 | Upper Body | 14 | Upper Guide Bushing | 21 | Lower Guide Bushing |
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 following are the 5 reasons for pinch valve quality issues.
- Insufficient natural raw rubber content and excessive regenerated rubber, which cause rubber loss, significant wear & tear, and short service life.
- Incorrect rubber composition causes poor wear resistance, and acid & alkali resistance.
- 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.
- 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.
- 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.