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


EagleBurgmann H12N series Replacement

Balanced, conical spring and O-ring pusher construction mechanical seals Type TG120HB, Used in the different media and medium pressure-support conditions due to extend material options. It is widely used in the general industrial applications.

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Products Details
  Conical spring, balanced,O-ring pusher construction  
  Torque transmission via conical spring,  independent of direction of rotation.
  Wide option in seal face material 。
  Spring with deep coils to reduce the risk of clogging in solids content or viscous liquids.
  Medium pressure-support due to Balanced design
  Dimensional data conform with DIN24960 standard
Recommended Applications
  Paper and sugar industry,Food Processing,waste  water technology
  Low solids content or viscous media
  Medium pressure-support conditions
  Sewage pumps, chemical pumps, screw pumps, process pumps
  Other Rotating Equipment.
Operating range

Shaft diameter:  d1=12...80mm
Pressure:    p=0...2.5Mpa(362.5psi)
Temperature:    t = -20 °C ...180 °C(-4°F to 356°F)
Sliding velocity:   Vg≤15m/s(49.2ft/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
    Silicon carbide (RBSIC) O
    Antimony Impregnated Carbon Graphite Ad
 Stationary Seat 
    Carbon graphite resin impregnated Ak
    Silicon carbide (RBSIC) O
    Cr-Ni-Mo Sreel (SUS316) G
    99% Al2O3 ceramic B1
 Auxiliary Seal 
    Fluorocarbon-Rubber (Viton) V
    Ethylene-Propylene-Diene (EPDM) E
    Stainless Steel (SUS304) F
    Stainless Steel (SUS316) G
    Left rotation: L Right rotation: R
 Metal Parts
    Stainless Steel (SUS304) F
    Stainless Steel (SUS316) G

Stationary Seat

Standard Stationary SeatT4G9

T4G9 equivalent to Burgmann G9

Alternatives Stationary SeatT7G9

T7G9 equivalent to Burgmann G9

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.