O-ring Pusher seals use a sliding secondary seal and in this design the O-ring is pushed along the outside diameter of the equipment shaft or sleeve. The O-ring retains the sealed liquid and follows along the shaft to compensate for face wear.


Product variants


John Crane Type58B Replacement

Mutil-Spring, and O-ring pusher mechanical seal Type TG58B with balanced construction, including anti-xetrusion ring, permits use in higher pressures. Used in the different media conditions due to extend material options . It is widely used in the general industrial applications.

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Products Details
  Mutil-Spring,balanced,O-ring pusher .
  Rotary seat with a snap ring holds all parts together in a unitised design which eases installation and removal
  Torque transmission by set screws.
  Conform with DIN24960 standard
Recommended Applications
  Chemical industry
  Industry pumps 
  Process Pumps
  Oil refining and petrochemical industry 
  Other Rotating Equipment
Operating range

Shaft diameter: d1=18...100 mm       
Pressure: p=0...5.2Mpa(754psi)
Temperature: t = -40 °C ..+200 °C(-40°F to 392°)

Sliding velocity: Vg≤25m/s(82ft/m)


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

Product Structure
Combination Materials
 Rotary Face
    Silicon carbide (RBSIC) O
    Tungsten carbide W1
    Carbon graphite resin impregnated Ak
 Stationary Seat 
    99% Aluminium Oxide B1
    Silicon carbide (RBSIC) O
    Tungsten carbide W1
    Fluorocarbon-Rubber (Viton) V
    Ethylene-Propylene-Diene (EPDM) E
    PTFE Enwrap Viton M1
    Stainless Steel (SUS304) F
    Stainless Steel (SUS316) G
 Metal Parts
    Stainless Steel (SUS304) F
    Stainless Steel (SUS316) G
Stationary Seat

Standard Stationary Seat: T7BP

T7BP equivalent to John Crane BP

Alternatives Stationary Seat: T3BO

T3BO equivalent toJohn Crane BO

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.