
ST Piston Seal
The published description pairs a filled-PTFE sealing ring with an O-ring for a double-acting piston.
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Shenyang Zhongye Seal Manufacturing Factory

This product is presented for double-acting reciprocating piston sealing in heavy-duty hydraulic cylinders.
Shenyang Zhongye Seal Manufacturing Factory lists Heavy-Duty Piston Square Ring in its published catalogue. This product is presented for double-acting reciprocating piston sealing in heavy-duty hydraulic cylinders. Its description combines a filled-PTFE sealing element with a square elastomer ring. Supply the groove drawing, extrusion clearance and movement duty to establish the actual materials and fitting requirements.
Shenyang Zhongye Seal Manufacturing Factory · Shenyang, Liaoning
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Source reviewed: 2026-11-10. This directory summary organises the supplier’s published product information.
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The published description pairs a filled-PTFE sealing ring with an O-ring for a double-acting piston.
View product →The supplier describes a stepped piston-seal profile for reciprocating hydraulic equipment.
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The OK design combines a split sealing ring made from a composite thermoplastic with a rectangular rubber energiser.
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The SPG construction uses a filled-PTFE ring and rectangular rubber element.
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The supplier combines a filled-PTFE sealing ring and O-ring in this double-acting piston-seal design.
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This named combination seal is included in the piston-seal catalogue.
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