China Sealcon Company

Double Cartridge Seals D21

Double Cartridge Seals D21
  • d21double-acting-mechanical-seal-1_1515654838.jpg
  • d21double-cartridge-mechanical-seal-2.jpg
  • d21double-cartridge-mechanical-seals-3.jpg
  • d21double-double-cartridge-seal-4.jpg
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  • Details
  • Technical Specification
  • Design Drawing

Performance Capabilities of Double Cartridge Seals D21

  • Temperature: -20℃ to 250℃, dependent on the elastomer
  • Pressure: Up to 25 bar
  • Speed: Up to 25 m/s
  • End play/axial float allowance ±1.0mm

Sizes of Double Cartridge Seals D21

25mm to 100mm
1” to 4”

Materials Combination of Double Cartridge Seals D21

  • Face: Carbon, SiC, TC
  • Seat: SiC, TC
  • O-rings: NBR, EPDM, VITON, Aflas, FEP, Kalrez, Chemraz etc.
  • Spring: SS316, Hastelloy C
  • Metal parts: SS316
Double Cartridge Seals by Size d D D1 L1 L2 L3 C E
D21-25 25 43 105 53.4 33.1 25.4 62 13.2
D21-28 28 46 105 53.4 33.1 25.4 62 13.2
D21-30 30 48 105 53.4 33.1 25.4 65 13.2
D21-32 32 49.8 108 53.4 33.1 25.4 67 13.2
D21-33 33 49.8 108 53.4 33.1 25.4 67 13.2
D21-35 35 53 113 53.4 33.1 25.4 70 13.2
D21-38 38 56 123 53.4 33.1 25.4 75 14.2
D21-40 40 58 123 53.4 33.1 25.4 75 14.2
D21-42 42 60.5 133 53.4 33.1 25.4 80 14.2
D21-43 43 60.5 133 53.4 33.1 25.4 80 14.2
D21-45 45 62.5 138 53.4 33.1 25.4 81 14.2
D21-48 48 65.6 138 53.4 33.1 25.4 84 14.2
D21-50 50 68 148 53.4 33.1 25.4 87 14.2
D21-53 53 72 148 53.4 33.1 25.4 97 18
D21-55 55 73 148 53.4 33.1 25.4 90 18
D21-60 60 78 157 53.4 33.1 25.4 102 18
D21-65 65 84.8 163 53.4 33.1 25.4 109 18
D21-70 70 93 178 53.4 33.1 25.4 118 18
D21-75 75 100 190 63.9 44.1 28 129 18
D21-80 80 106.4 195 63.9 44.1 28 135 18
D21-85 85 109.5 198 63.9 44.1 28 139 22
D21-90 90 115.9 205 63.9 44.1 28 145 22
D21-95 95 119.1 208 63.9 44.1 28 148 22
D21-100 100 125.4 218 63.9 44.1 28 154 22

Double Cartridge Seals by Size d D D1 L1 L2 L3 C E
D21-1" 1 1.693 4.134 2.102 1.303 1 2.44 0.52
D21-1.125" 1.125 1.811 4.134 2.102 1.303 1 2.44 0.52
D21-1.25" 1.25 1.96 4.33 2.102 1.303 1 2.64 0.52
D21-1.375" 1.375 2.086 4.449 2.102 1.303 1 2.75 0.52
D21-1.5" 1.5 2.2 4.842 2.102 1.303 1 2.95 0.52
D21-1.625" 1.625 2.34 4.842 2.102 1.303 1 3.03 0.599
D21-1.75" 1.75 2.46 5.433 2.102 1.303 1 3.19 0.599
D21-1.875" 1.875 2.582 5.433 2.102 1.303 1 3.19 0.599
D21-2" 2 2.677 5.827 2.102 1.303 1 3.43 0.599
D21-2.125" 2.125 2.834 5.827 2.102 1.303 1 3.82 0.709
D21-2.25" 2.25 2.96 6.181 2.102 1.303 1 3.94 0.709
D21-2.375" 2.375 3.07 6.181 2.102 1.303 1 4.02 0.709
D21-2.5" 2.5 3.212 6.417 2.102 1.303 1 4.17 0.709
D21-2.625" 2.625 3.338 6.417 2.102 1.303 1 4.29 0.709
D21-2.75" 2.75 3.66 7.008 2.102 1.303 1 4.65 0.709
D21-2.875" 2.875 3.811 7.283 2.102 1.303 1 4.96 0.709
D21-3" 3 3.937 7.48 2.516 1.736 1.102 5.079 0.709
D21-3.125" 3.125 4.063 7.677 2.516 1.736 1.102 5.197 0.709
D21-3.25" 3.25 41.89 7.677 2.516 1.736 1.102 5.315 0.709
D21-3.375" 3.375 4.311 7.795 2.516 1.736 1.102 5.472 0.866
D21-3.5" 3.5 4.437 7.795 2.516 1.736 1.102 5.591 0.866
D21-3.625" 3.625 4.563 8.071 2.516 1.736 1.102 5.709 0.866
D21-3.75" 3.75 4.689 8.189 2.516 1.736 1.102 5.827 0.866
D21-4" 4 4.937 8.583 2.516 1.736 1.102 6.063 0.866


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