Mechanical Seal Manufacturer
Home > Products > Component Seals > SS-20R/SS-20: John crane Type 20R/20 PTFE wedge seal

SS-20R/SS-20: John crane Type 20R/20 PTFE wedge seal

Description:
SS-20R/SS-20: PTFE wedge seal, replacement of John crane Type 20R/20

Share this site:

  • Product Detail
  • Make an inquiry
SS-Type 20&SS-Type 20R:John Crane Type 20/Type 20R
Structure Description:
Equivalent to John Crane Type 20/Type 20R
SS-Type 20 and SS-Type 20R Shaft Seals feature chemically inert materials in all areas and on all surfaces in contact with the liquid being sealed;
Metallic components, springs and clamp ring, are located outside the pump seal chamber, isolated from the process liquid;
Multiple springs are standard,A single spring design is available;
For use with extremely corrosive chemicals, including concentrated acids and salts, strong oxidizing and reducing agents, and chemically active organic compounds commonly used on PTFE filled pumps.

Operating Limits:
Temperatures: -45˚C to 121˚C/-50˚F to 250˚F
Pressures: 10 bar g/150 psig
Speeds:
20: To 5 mps/1000 fpm
20R: To 13 mps/2600 fpm

Materials:
Seal ring: Carbon (Type 20R),Resin Filled PTFE (Type 20),Silicon Carbide
Secondary Seal: PTFE
Metal parts: 316


SS-Type 20 Dimensions(Inches)
D1 D3 L3 L50
0.625 1.312 2.062 2.875
0.750 1.437 2.062 2.875
0.875 1.562 1.000 2.812
1.000 2.250 1.000 1.718
1.125 2.375 1.062 1.781
1.250 2.625 1.062 1.781
1.375 2.750 1.125 1.875
1.500 2.875 1.125 1.875
1.625 3.000 1.375 2.125
1.750 3.125 1.375 2.125
1.875 3.375 1.375 2.125
2.000 3.500 1.375 2.250
2.125 3.625 1.687 2.562
2.250 3.750 1.687 2.562
2.375 3.875 1.687 2.562
2.500 4.000 1.687 2.562
2.625 4.125 1.687 2.562
2.750 4.250 1.687 2.562
2.875 4.375 1.687 2.562
3.000 4.500 1.687 2.562
3.125 4.875 1.687 2.562
3.250 5.000 1.687 2.562
3.375 5.125 1.687 2.562
3.500 5.250 1.687 2.562
3.625 5.375 1.687 2.562
3.750 5.500 1.687 2.562
3.875 5.625 1.687 2.562
4.000 5.750 1.687 2.562

SS-Type 20 Dimensions(mm)
D1 D3 L3 L50
0.875 1.937 1.937 2.812
1.000 2.250 1.062 1.781
1.125 2.375 1.125 1.843
1.250 2.625 1.125 1.843
1.375 2.750 1.125 1.875
1.500 2.875 1.125 1.875
1.625 3.000 1.375 2.125
1.750 3.125 1.375 2.312
1.875 3.375 1.375 2.312
2.000 3.500 1.375 2.250
2.125 3.625 1.687 2.562
2.250 3.750 1.687 2.562
2.375 3.875 1.687 2.562
2.500 4.000 1.687 2.562
2.625 4.125 1.687 2.562
2.750 4.250 1.687 2.562
2.875 4.375 1.687 2.562
3.000 4.500 1.687 2.562
3.125 4.875 1.687 2.562
3.250 5.000 1.687 2.562
3.375 5.125 1.687 2.562
3.500 5.250 1.687 2.562
3.625 5.375 1.687 2.562
3.750 5.500 1.687 2.562
3.875 5.625 1.687 2.562
4.000 5.750 1.687 2.562