BS21

BS21

Operation conditions
Temperature -20℃~200℃
Pressure

≤1.2 mPa

Speed ≤13 m/s
Materials

Mating ring: Ceramic/SIC/TC
Rotary ring: Carbon/SIC/TC
Bellows: NBR/EPDM/VITON/PTFE
Metal parts: SS304/SS316

pdf Download PDF (BS21)

Applicable to different types of pumps, compressors, blenders and mixers.

Analog to the following mechanical seals:


Model D1 D2 D3 D4 L1 L2
BS21-1/2" 12.7 27.8 23.81 26.99 20.64 8.7
BS21-5/8" 15.88 30.95 26.99 33.34 22.23 10.3
BS21-3/4" 19.05 34.15 30.16 36.51 22.23 10.3
BS21-7/8" 22.23 37.3 33.34 39.69 23.81 10.3
BS21-1" 25.4 40.5 42.85 49.2 25.4 10.3
BS21-1 1/8" 28.58 47.65 46.02 52.37 26.97 11.9
BS21-1 1/4" 31.75 50.8 49.2 55.55 26.97 11.9
BS21-1 3/8" 34.93 54 52.37 58.72 28.58 11.9
BS21-1 1/2" 38.1 57.15 55.55 61.9 28.58 11.9
BS21-1 5/8" 41.28 60.35 63,5 69.85 34.93 11.9
BS21-1 3/4" 44.45 63.5 66.68 73.03 34.93 11.9
BS21-1 7/8" 47,63 66,7 69,85 76,2 38,1 11,9
BS21-2" 50.8 69.85 73.03 80.95 38.1 13.5
BS21-2 1/8" 53.98 73.05 76.2 84.12 42.85 13.5
BS21-2 1/4" 57.15 76.2 79.38 87.3 42.85 13.5
BS21-2 3/8" 60.33 79.4 82.55 90.47 46.02 13.5
BS21-2 1/2" 63.5 82.55 84.91 93.65 46.02 13.5
BS21-2 5/8" 66,68 92,1 88,9 101,6 49,2 15,9
BS21-2 3/4" 69.85 95.25 95.25 104.78 49.2 15.9
BS21-2 7/8" 73.03 98.45 98.43 111.13 52.37 15.9
BS21-3" 76.2 101.6 101.6 114.3 52.37 15.9
BS21-3 1/8" 79.38 111.15 104.78 120.65 55.55 19.9
BS21-3 1/4" 82.55 114.3 107.95 123.83 55.55 19.9
BS21-3 3/8" 85.33 117.5 114.3 133.35 55.55 19.9
BS21-3 1/2" 88.9 120.65 117.48 136.53 55.55 19.9
BS21-3 5/8" 92.08 123.85 120.65 139.7 58.72 19.9
BS21-3 3/4" 95.25 127 123.83 142.88 58.72 19.9
BS21-3 7/8" 98.43 130.2 127 146.05 61.9 19.9
BS21-4" 101.6 133.35 130.18 149.23 61.9 19.9

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