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Diesel & Gas Engines(Marine / Power Generation)


Marine engine


Gas engine


Power generation

 
Engines developed for marine propulsion and power generation have to operate in increasingly challenging conditions due to environmental legislation and increasing fuel costs.
 
Sealing technology is becoming a more critical part of engine development and is often a limiting factor in engine performance.
 
Seals are often exposed to aggressive combinations of coolants and oils at extreme temperatures, while expectations for seal performance and lifetime are increasing.
 

comprehensive range of high performance materials specifically developed to meet the sealing needs of the industry.

Typical applications include:-

  • Cylinder liners
  • HP diesel, HFO & gas injectors
  • Inlet & exhaust valve seats
  • Turbochargers
  • Heat exchangers
  • Pipe connectors
  • Hydraulic systems
  • Sump, access covers and rocker covers
 

PPE offers a complete range of engineered solutions for engine sealing requirements:

  • Precision O-rings
  • D-rings
  • U-section seals
  • Lip seals
  • Extruded profiles
  • Custom profiles
  • Composite parts
 
Elastomer grades for large diesel & gasengines
Material
Type
PPE
Code
Description Hardness Temperature
Range(°C)
Colour
EPDM E70K Excellent water &
coolant resistance

74

-40 to +125 Black

NBR

N70J


N70L


N70M
Med-high acrylonitile -
excellent oil & abrasion
resistance
Low-medium
acrylonitile - excellent
oil resistance 
Medium acrylonitile -
excellent oil &
fuel resistance

73

70

75

-30 to +210

-40 to +210

-40 to +210
Black

Black

Black
FKM
(FPM)

V71C


V74C



V75G



V75J


V75L


V76E


V80D


V95X

V97B

Extremely
low
temperature
capability - terpolymer
Extremely
low compression set,
excellent heat ageing -
copolymer
Excellent resistance to
oil, fuels and
hydraulic fluids -
copolymer
Excellent water &
steam resistance,
peroxide - terpolymer
Excellent resistance to
water, steam, oils &
fuels - copolymer
Kemex™ - exceptional
fluid resistance -
tetrapolymer
Excellent resistance to
air and petroleum -
copolymer
High pressure resistance
- copolymer
Anti-extrusion,
high pressure, oil &
fuel resistance -
terpolymer

72


75



71



75


75


75


78


91

95

-45 to +225


-18 to +225



-20 to +200



-15 to +200


-15 to +200


-20 to +206


-20 to +225


-20 to +200

-10 to +225
Black


Black



Green



Black


Black


Black


Black


Black

Black
VMQ S60R


S70R
General purpose
silicone, ideal for
coolant sealing
Excellent heat resistance
ideal for dry heat static seals

60

70

-60 to +250

-50 to +250

Red

Red

HNBR

Z70B

Medium acrylonitile -
excellent resistance to
oil additives

70

-30 to +180 Black
FFKM
(FFPM)
G75B
G80A
Perlast® perfluoroelastomer grades - ultimate chemical resistance and suitable for very high temperature applications

78
80

-15 to +325
-15 to +260
Black
Black
Perlast® and Kemex™ are registered trademarks of Precision Polymer Engineering Ltd
 
Material datasheets can be downloaded from the PPE website:
 

Typical applications:

Location E70K G75B N70L N70M V71C V74C V75G V75J V75L V76E V95X V97B Z70B
Cylinder liners              

*

*

       
Exhaust valve seats  

*

         

*

         
Valve stem seals            

*

         

*

Pre-heat chamber  

*

         

*

         
Fuel system        

*

 

*

*

 

*

     
Common rail lines                    

*

*

 
Coolant systems

*

         

*

*

*

       
Hydraulic systems      

*

               

*

Turbo charger  

*

     

*

             
Manifold gaskets          

*

 

*

*

       
Head Gaskets          

*

 

*

*

       
Shaft seals    

*

*

*

               
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