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SELECTING SEAT MATERIAL FOR BUTTERFLY VALVE

SELECTING SEAT MATERIAL FOR BUTTERFLY VALVE

SELECTING SEAT MATERIAL FOR BUTTERFLY VALVE

(OP)
I AM IN SEARCH OF A COMPATIBILITY CHART FOR PROPYLENE GLYCOL (DOWFROST HD) WHEN SELECTING SEAT MATERIALS FOR BUTTERFLY VALVES.  SPECIFICALLY: EPDM, NBR, PTFE, SINCE THESE ARE THE MOST COMMON AND LEAST EXPENSIVE.

THANKS.


RE: SELECTING SEAT MATERIAL FOR BUTTERFLY VALVE

(OP)
JIMCASEY, I was unable to locate the durco technical document DVATB0004. Will you help me find it.

Thanks,

RE: SELECTING SEAT MATERIAL FOR BUTTERFLY VALVE

(OP)
PROBLEM: CONFLICTING MATERIAL COMPATABILITY FOR 60ºF-130º AT 100PSIG PROPYLENE GLYCOL (DOWFROST HD.

SOURCE    
AST, MECHANICAL SEAL MATERIAL SELECTION GUIDE
NBR:NO
EPDM:NO
VITON:YES

SOURCE    
CHEMICAL RESISTANCE GUIDE FOR ELASTOMERS II
NBR:YES UP TO 250ºF
EPDM:YES UP TO 70ºF
VITON:YES UP TO 140ºF

SOURCE    
NIBCO CHEMICAL RESISTANCE GUIDE FOR VALVES AND FITTINGS
NBR:YES UP TO 180ºF
EPDM:YES UP TO 70ºF
VITON:YES UP TO 140ºF

SOURCE    
CAT PUMPS, CHEMICAL COMPATABILITY GUIDE
NBR:YES
EPDM:N/A
VITON:YES

SOURCE    
MCNALLY INSTITUE, O-RING SELECTION
NBR:YES
EPDM:N/A
VITON: N/A

SOURCE    
GEORG FISCHER, CHEMICAL RESISTANCE
NBR:YES UP TO 68ºF
EPDM:YES UP TO 104ºF
VITON: YES UP TO 104ºF

SOURCE    
COLE-PARMER, CHEMICAL COMPATABILITY
NBR:YES
EPDM:YES
VITON: YES

SOURCE    
BRAY CONTROLS, MATERIAL SELECTION GUIDE
NBR:YES
EPDM:YES, PREFERED
VITON: YES

SOURCE    
PARKER SEALS, FLUID COMPATIBILITY GUIDE
NBR:NO
EPDM:YES
VITON: NO

SOURCE    
VIKING, TECHINICAL DATA, FIREFIGHTER ELIMINATOR C
NBR:YES
EPDM:YES
VITON: YES


WHICH WOULD YOU SELECT.  I WOULD RATHER GO WITH EPDM OR NBR INSTEAD OF VITON DUE TO THE COST.

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