Elastomer bellows mechanical seal is indentified by the use of an elastomer bellows or diaphragm for the secondary sealing member. Elatomer bellows seal units require a positive abutment at the back of the bellows or spring, positioned so as to give the correct seal working length


Product variants


John Crane Type2100 Replacement

Compact,single-spring,elastomer bellows mechanical seals Type 2100 provides maximum performance and efficiency. Wideky used in centrifugal,rotary and turbine pumps,compressors and other rotary equipment.

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Products Details
  SIingle Seal,easy installation and replacement 
  Innovative bellows design is pressure-supported and will not crease or fold under high pressure
  Conform with DIN24960 EN12756 DIN24960,ISO3069 standard
Recommended Applications
  Process pumps
  Centrifugal pumps
  Turbine pumps
  Other rotary equipment
Operating range

Shaft diameter: d1=10...75mm(0.375'' ...3.000'')
Pressure:  p=0...1.2Mpa(174psi)
Temperature:   t = -20 °C ...150 °C(-4°F to 302°F)
Sliding velocity: Vg≤13m/s(42.6ft/m)


Notes: The range of preesure,temperature and sliding velocity is depend on seals combination materials

Product Structure
Combination Materials
 Rotary Face 
    Carbon graphite resin impregnated Ak
    Hot-Pressing carbon Ac 
    Silicon carbide (RBSIC) O
 Stationary Seat 
    Aluminium oxide(Ceramic) B
    Silicon carbide (RBSIC) O
    Tungsten carbide W1
 Auxiliary Seal 
    Nitrile-Butadiene-Rubber (NBR) P
    Fluorocarbon-Rubber (Viton) V
    Ethylene-Propylene-Diene (EPDM) E
    Stainless Steel (SUS304) F
 Metal Parts
    Stainless Steel (SUS304) F
Stationary Seat

Standard Stationary Seat:T1M
T1M equivalent to John Crane M

Alternatives Stationary Seat:T3BS

T3BS equivalent to John Crane BS

Standard Stationary Seat:T1NG (inch size)

T1NG equivalent to John Crane NG

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WenZhou TianGu Seal Co., Ltd was founded in 1982, is located in Wenzhou City, Zhejiang Province Economic and Technological Development Zone, China Hydraulics Pneumatics & Seals Industry Association, in the mechanical seal product design, manufacturing and sales of businesses.