Pinch Valves Β· Mechanical Pinch Valves
Cast Iron Pinch Valves
The cast iron pinch valve is the manually operated, platen-type execution of the pinch principle: a handwheel-driven trolley and platen squeeze an elastic rubber bushing directly to stop or resume flow, with only the bushing in contact with the medium. The benchmark page covers DN25 to DN150 at PN10, PN16 and 150LB in cast iron, carbon steel, SS304 and SS316 bodies, manufactured to ANSI, DIN and JIS standards with flanging to ANSI B16.5, DIN 3202 and JIS and hydrostatic inspection to BS 6755.
Part of the Mechanical Pinch Valves family
Last updated: 2026-11
Specifications
| body materials | Cast iron, Carbon Steel, SS304, SS316 |
|---|---|
| rubber bushing materials | Rubber |
| stem materials | Carbon Steel |
| platen materials | Cast Iron |
| trolley materials | Cast Iron |
| bracket materials | Cast Iron |
| handwheel materials | Cast Iron |
| size range | DN25 to DN150 |
| pressure class | PN10, PN16, 150LB |
| design standards | ANSI, DIN, JIS |
| flanged end dimension | ANSI B16.5, DIN3202, JIS |
| inspection and test | BS6755 |
Application & selection guidance
Select this execution for abrasive, slurry or granular duty where a simple manual isolate valve with a full elastomer flow path outlasts metal-seated alternatives: the sleeve is the only wear part and is replaced in service without cutting the body. Choose the body material against the environment (cast iron for utility duty, stainless for corrosive wash-down), and match the PN10/16 or 150LB flanging standard - ANSI, DIN or JIS - to the mating pipe class.
Frequently asked questions
How does a platen-type pinch valve close the line?
The handwheel drives a trolley and platen that press the elastic rubber bushing from the outside until the passage collapses; only the bushing touches the medium, so abrasive or granular solids never reach seats, gates or packing. Releasing the handwheel lets the bushing spring back to full bore.
Which sizes and ratings does this execution cover?
The benchmark page lists nominal sizes DN25 to DN150 at nominal pressures PN10, PN16 and 150LB, with flanged ends to ANSI B16.5, DIN 3202 and JIS - a utility and process envelope suited to slurry, powder and wastewater lines within that span.
What must be replaced on service?
The rubber bushing is the single media-contact wear part - the cast iron body, platen and trolley stay out of the flow. Bushing replacement is an in-line maintenance task on the benchmark construction, which is why the execution is favoured where metal-seated valves would erode quickly.
Ordering & documentation
Documents
Ask for the documentation set you need with the inquiry β typical items for this execution (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
A quotation-ready inquiry states: nominal size and pressure rating, body and seat material preference, end connection, operation, and the service medium with temperature. Typical values on this page are benchmark reference ranges; the binding values are confirmed at quotation.
Sample & supply
Supply terms, order quantities and lead time are agreed per order β state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, keep end-face protectors on until installation, and for elastomer- or PTFE-seated executions avoid prolonged outdoor storage β seat compounds age fastest in direct sunlight and freezing conditions.
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