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JST has passed ISO9001 quality management system certification, API Q1 system certification and HSE system certification. JST is dedicated to innovation, and has developed over 40 patented products and counting.

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HNBR S seal for downhole application

S Seals are well suited for sealing wellheads, connectors, downhole tools, high pressure valves and other demanding oil and gas applications. The non-extrusion springs can be fabricated from different metals. The S seal is made of spring and rubber material could be NBR, HNBR, FKM ect.

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