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 Type6 Replacement

Compact, elastomer bellows mechanical seals Type E widely used in small power circulation pump,centrifugal pumps, jet pumps, swimming pool pumps and other small rotating shaft equipment

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Products Details
  Compact Structure 
  Easy and fast to change the seal parts 
  Reliable in performance,longer service life
Recommended Applications
  Process pumps
  Centrifugal pumps
  Swimming pool pumps
  Other rotary equipment.
Operating range

Shaft diameter: d1=0.375'' ...1.000''
Pressure: p=0...0.5Mpa(72.5psi)
Temperature: t = -30 °C ...180 °C(-22°F to 356°F)
Sliding velocity:  Vg≤3600r/min


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

Product Structure

 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
 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

Combination Materials
Stationary Seat

Standard Stationary Seat:T1NG
T1NG equivalent to John  John Crane NG

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.