To facilitate in ordering product combinations based on actual materials,
McKenzie Valve has implemented material codes for elastomers.     

For Valves with Elastomeric (rubber) components, use the base part number then material code, separated by a dash. 
(ie 506981-BNFG)

Older numeric codes can also be used.
 
Buna N BN
Buna N Food Grade BNFG
Butyl Rubber BU
Carolina Seal 5355 CS5355
Carolina Seal Viton 4273 CS4273
Chemraz 505 CZ505
Chlorobutyl CHL
EPDM Food Grade (Ethylene Propylene) EPFG
EPDM Peroxide Cured (Ethylene Propylene) EP
EPR Ethylene-Propylene Copolymer EPR
EPT Ethylene-Propylene-Diene Terpolymer EPT
Kalrez 1050LF KZ1050
Kalrez 2035 KZ2035
Kalrez 4079 KZ4079
Kalrez 6375 KZ6375
Neoprene NE
Rubber Food Grade RFG
Silicone SI
Teflon Encapsulated Viton VTFE
Viton 747 V747
Viton A VA
Viton A - Certified Dupont VA-C
Viton B VB
Viton Extreme ETP VETP
Viton GF VG
Viton GFLT VGFLT
Viton GFS VGFS
Viton, Generic V
White Neoprene Food Grade WNE

*Dark shaded material have been replaced by superior materials.

  
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