O-Rings
Saite identifies O-rings in its own product classification; request the actual compound and cross-section rather than inferring a material from the photograph.
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Saite lists butterfly-valve liners; confirm the valve-body geometry, disc interface and required compound for the proposed liner.
Supply the component drawing, compound requirements, dimensions, mating geometry and operating environment. Request the offered rubber component and material information, with the actual assembly and contact conditions used to confirm fit and suitability. Request the current catalogue or drawing for this item, and confirm the offered configuration and supporting documents with the company before specifying an order.