Pneumatic Pinch Valve -- Rubber Sleeve Slurry
Full-Bore Abrasive Slurry Isolation Valve with Replaceable Rubber Sleeve
Document No.SV-DS-SPC-008
RevisionRev A
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
This datasheet covers pneumatic pinch valves with natural rubber, EPDM, or polyurethane sleeve for abrasive slurry isolation in mining, pulp and paper, power plant ash, and wastewater grit service.
Technical Specifications
| Parameter | Specification |
|---|
| Valve Size Range | DN25 to DN300 (1" to 12") |
| Pressure Rating | PN10 / PN16 |
| Body Material | Cast iron GG25 or aluminium alloy body, non-wetted |
| Sleeve Material | Natural rubber, EPDM, neoprene, or polyurethane reinforced with fabric plies |
| Reinforcement | Multi-ply nylon or polyester fabric reinforcement for pressure resistance |
| Studs / Nuts | SS304 studs and nuts for corrosion resistance |
| Flange Inserts | CI or SS316 flange inserts to match piping flange specification |
| Air Supply | 4 to 6 bar clean dry air for sleeve collapse |
| Temperature Range | -10°C to +80°C (natural rubber); +120°C (EPDM); +70°C (polyurethane) |
| End Connections | Flanged ASME B16.5 / BS EN 1092-1, threaded, hose barb |
| Features | Full bore unobstructed flow, only rubber sleeve wetted, low air consumption, self-cleaning, replaceable sleeve |
Materials of Construction
| Component | Material |
|---|
| Body | Cast iron GG25 or aluminium alloy, split-body or bar design, non-wetted by process fluid |
| Sleeve | Natural rubber, EPDM, neoprene, or polyurethane with 2-4 ply nylon/polyester fabric reinforcement |
| Reinforcement | Woven nylon or polyester fabric plies embedded in rubber for pressure containment and wear resistance |
| Studs / Nuts | SS304 studs and nuts with zinc-plated or hot-dip galvanised finish for corrosion resistance |
| Flange Inserts | Cast iron or SS316 flange inserts to match piping flange drilling and face finish |
| Air Fittings | Brass or SS304 NPT air connections with filter-regulator-lubricator recommended |
| End Plates | Cast iron or aluminium end plates with sleeve compression groove for positive retention |
Testing & Inspection
| Test | Requirement |
|---|
| Test Standard | Hydrostatic shell test at 1.5x PN; air-operated seat leak test |
| Certification | CE, ISO 9001, FDA on request for food-grade sleeves |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | ISO 9001 / manufacturer proprietary design |
Notes
- Sleeve material must be selected for chemical compatibility, temperature, and abrasion resistance; submit fluid analysis at order.
- Air supply must be clean, dry, and oil-free (ISO 8573-1 Class 3.2.3); contaminated air causes sleeve degradation and erratic operation.
- Minimum operating differential pressure is 0.5 bar below line pressure; for vacuum service, specify vacuum-rated sleeve reinforcement.
- Sleeve life depends on abrasion severity; typical life is 500,000 to 2,000,000 cycles in light slurry, 50,000 to 200,000 in heavy tailings.
- Replace sleeve when wall thickness wear exceeds 30% or when leakage occurs at full air pressure; inspect monthly in severe service.
