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sealconchina on 25 Dec 24Elastomer Bellow Seals R18 Replacement for: John Crane Type 21 Mechanical Seal Features: Single-Spring SS316 metal available Oversize available Operating Limits of Elastomer Bellow Seals R18 Temperature: -20℃ to 150℃, dependent on the elastomer Pressure: Up to 8 bar Speed: Up to 10 m/s End play/axial float allowance ±0.1mm Sizes of Elastomer Bellow Seals R18 1/2" to 3" Materials Combination of Elastomer Bellow Seals R18 Face: Carbon, SiC, TC Seat: Ceramic, SiC, TC Bellow: NBR, EPDM, VITON etc. Spring: SS304, SS316 Metal parts: SS304, SS316 If you want to buy single spring mechanical seal, please contact us. Hangzhou Sealcon Fluid Machinery CO., Ltd was established in 2011, with Sealcon trademark we specialized in mechanical seal china design, manufacturing, maintenance and sales, as well as the pump valve spare parts procurement and sales. The main products are the complete sets of the mechanical seals, include cartridge seals, rubber bellow seals, metal bellow seals and o-rings seals, those products are applicable to different working condition.