Description
Rubber Lined Pneumatic Pinch Valves (also known as pneumatic tube clip valves or air-operated pinch valves) are highly efficient 100% full-port isolation valves specifically engineered for abrasive slurries, dry powders, sludge, and corrosive chemical media. Operated directly by compressed air or hydraulic fluid applied to the valve body interior, these valves compress the flexible rubber sleeve to achieve dynamic, bubble-tight shut-off without mechanical actuators.
Designed for severe material handling and abrasive lines, these valves perform reliably alongside our industrial butterfly valves and connect seamlessly to slurry pipelines using precision-machined industrial flanges.
Technical Specifications
| Technical Parameter | Specification Details |
|---|---|
| Nominal Diameter Range | DN20 to DN300 (3/4" to 12") |
| Nominal Pressure | PN6 / PN10 / PN16 / Class 150 |
| Valve Body Material | Cast Aluminum Alloy, Cast Iron, Ductile Iron, Stainless Steel (CF8 / 304 SS) |
| Rubber Sleeve Material | Natural Rubber (NR), EPDM, NBR (Nitrile), FKM (Viton), Food-Grade Silicone |
| Control Air Pressure | 2.0 to 6.0 bar (Air differential pressure over line pressure) |
| Working Temperature | -20°C to 120°C (-4°F to 248°F depending on rubber elastomer selection) |
| Connection Standard | Flanged Ends (ASME B16.5 Class 150, EN 1092-1, DIN 2501) |
| Actuation Type | Direct Pneumatic / Air Pressure Operated (No external cylinder needed) |
Key Features & Pneumatic Pinch Mechanics
Direct pneumatic rubber pinch valves offer distinct mechanical benefits for highly abrasive and particulate media:
- 100% Full-Bore & Non-Clogging Flow: In the open position, the rubber sleeve matches the exact inner pipe diameter, providing zero flow resistance and preventing solids or fibers from trapping or clogging.
- Self-Cleaning & Abrasion-Resistant Sleeve: High-tensile, fabric-reinforced rubber elastomer flexes during operation, breaking up scale and deposits for reliable, self-cleaning bi-directional shut-off around trapped solids.
- Simple Maintenance & Zero Media Contact: The fluid medium only contacts the inner surface of the rubber sleeve, completely isolating metal housing parts from wear, corrosion, and contamination.
Target Applications & Industries
Our pneumatic rubber-lined tube clip valves are widely specified across heavy solids and slurry handling systems:
- Mining & Mineral Processing: Ore tailings transport, slurry lines, lime milk dosing, and cyclone feed isolation.
- Pneumatic Conveying Systems: Cement, fly ash, carbon black, plastic granules, and dry powder handling.
- Wastewater & Environmental Engineering: Municipal sewage sludge, sand-laden water, and industrial effluent treatment.
Frequently Asked Questions (FAQ)
Q1: How much control air pressure is required to fully close the valve?
The valve typically requires a control air pressure 1.5 to 2.5 bar higher than the line fluid pressure inside the sleeve to ensure complete, bubble-tight closure.
Q2: How do I select the right rubber sleeve material for my process medium?
Select Natural Rubber (NR) for high physical abrasion and slurry wear; EPDM for hot water, steam, or mild acids; NBR for oil and grease; and FKM (Viton) for aggressive chemical compounds.
Q3: Can replacement rubber sleeves be purchased separately from Oucang Valve?
Yes. As a direct factory, Oucang Valve manufactures precision-molded replacement rubber sleeves that can be quickly swapped on-site without purchasing a complete valve assembly.
About the Manufacturer: Oucang Valve
Oucang Valve is an ISO-certified direct manufacturer specializing in severe-service pinch valves, rubber-lined valves, and forged industrial pipe flanges. Operating our own rubber vulcanization workshop, CNC machining center, and pressure testing facility, we provide custom OEM designs and direct worldwide delivery.
- Core Capability: Elastomer vulcanization molding, severe slurry valve design, custom replacement sleeve production, and rapid global export.
- Quality Compliance: ASME B16.5, DIN, EN, and ISO standards.
- Factory Inquiry: Contact our engineering sales team for direct factory prices, rubber material compatibility charts, and 2D/3D CAD drawings.
