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Mechanical seals according to standards

Acc. to DIN EN 12756 (DIN 24960)
     
Typ
208N
210N
  • single-acting
  • short designed (L1kU)
  • balanced
  • independent of direction of rotation
  • multiple springs (protected)
  • stationary design
 
Dimensions:  28-100 mm
(also in inches)
  210N 208N
pmax: 28 bar 50 bar
t: -80°C... +260°C
(acc. to secondary seal)
vmax: 25 m/s 35 m/s
 

Mechanical seals 208N are specially suitable for abrasive media, solids-bearing and very viscous media because of their stationary design. Solid standard mechanical seal with high service life, also in difficult ambience.

As 208-S in hot water design.

210N is the "economy" design of 208N.

Mostly required material combinations available, see material chart.

    
    
Typ
151
  • single-acting
  • short design (L1k)
  • balanced
  • independent of direction of rotation
  • multiple springs
 
Dimensions: 10-120 mm
(also in inches)
pmax: 50 bar
t: -100°C... +250°C
(acc. to secondary seal)
vmax: 25 m/s
 

Rotary standard mechanical seal specifically for clean media in the higher temperature range and for media operating close to vapour point; e.g. light hydrocarbons; and for low temperature applications.

Exclusive use of solid seal faces / stationary seats ; thus lowest level of seal face distortion when exposed to compressive load and thermic pressure.

Mostly required material/ mating of materials available: see material chart.

The same seal with single spring: style 152 (R); 153 (L).

  
    
Typ
111
  • single-acting
  • short design (L1k)
  • unbalanced
  • independent of direction of rotation
  • multiple springs
 
Dimensions: 10-110 mm
(also in inches)
pmax: 12 bar
t: -80°C...+250°C
(acc. to secondary seal)
vmax: 25 m/s
 

Unbalanced standard mechanical seal, specifically for clean media for applications up to a pressure of 12 bar.

Exclusive use of solid seal faces / stationary seats; thus lowest level of seal face distortion when exposed to compressive load and thermic pressure.

Mostly required material/ mating of materials available: see material chart.

The same seal with single spring: style 112(R);13 (L).

Standard mechanical seal with conical spring: 114 (R/S).
  
    
Typ
117
  • multiple-acting
  • short design
  • unbalanced
  • independent of direction of rotation
  • multiple springs
 
Dimensions: 18-110 mm
(also in inches)
pmax: 12 bar
t: -80°C...+250°C
(acc. to secondary seal)
vmax: 25 m/s
 

Short-designed standard double mechanical sea, by use of joint drive collar/ spring package for inner and outer mechanical seal.

Operation with higher barrier fluid pressure.

Mostly required material/ mating of materials available: see material chart.

   
    
Typ
700
  • single-acting
  • short design
  • balanced
  • independent of direction of rotation
  • metal bellows
 
Dimensions: 20-100 mm
(also in inches)
pmax: 25 bar (outside)
10 bar (inside)
t: -80°C...+315°C
(acc. to secondary seal)
vmax: 25 m/s
 

Mechanical seal with metal bellows for solids-bearing media and higher temperatures, such as sludge, pulp and paper (up to 2 % ATRO without flushing) and applications in refineries and petrochemical industry
  The following modifications and designs of the 700 series are available:
 
700H high temperature design
700S high temperature cartridge design
770/711 tandem double mechanical seal
790/791/792 special design for double-lead screw extruders
       
 

Mostly required material/ mating of materials available: see material chart