40-90 Shore A Hardness NBR HNBR EPDM Silicone Rubber O Rings Sealing Gasket in AS568 Standard Metric Sizes

Chinese factory supplier provide high quality rubber o rings rubber sealing gasket

Product introduction

SHQN supplies rubber O-rings for static and suitable dynamic sealing positions defined by equipment drawings. The existing range includes NBR, HNBR, FKM, FFKM, EPDM and silicone options with a 40–90 Shore A catalogue hardness reference. Specify one compound grade and hardness target with the inside diameter, cross-section and tolerance.

For oilfield O-ring orders, provide the groove drawing, fluid composition, temperatures and pressure cycling. Specify continuous and peak temperatures, exposure duration and thermal cycling for each selected compound grade. For sour-gas, aggressive-chemical or rapid-decompression service, include the required grade qualification, medium composition and decompression conditions together with the complete equipment pressure limits.

For pump or machinery maintenance, identify the exact sealing position and whether the duty is static or dynamic. Include the process fluid and cleaning agents. NBR may be considered for compatible petroleum service and EPDM for appropriate water-based service, but formulation and temperature limits must be reviewed. Installation in one position does not establish suitability for a rotating shaft or another medium.

O-Ring or Sealing Gasket: Confirm the Profile Before Quoting

An O-ring requires an inside diameter and circular cross-section reference. Other sealing gasket profiles need their own drawing, thickness and mating-surface details. Do not infer interchangeability from the general term “rubber sealing gasket.” Include the equipment position and whether the seal is static or moving.

Color does not identify the compound, and hardness does not independently establish a pressure rating. Confirm the groove condition and follow the equipment maker’s installation procedure. We operate an ISO 9001 quality management system; agree dimensional and material inspection criteria with the order.

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