Propiedad de polimeros

Available Material for Each Valve
Minidisc & Doubledisc
Seat Teflon, Silicone, Buna, EPDM, Viton®
"O" rings Buna, Viton® EPDM, Silicone, Calrez® (special order)
BetterflySeat Silicone,EPDM, Viton®, Teflon-coated Viton®
Check Seat & Body "O" rings EPDM, Viton®
ITC Plug
Bushings Teflon
"O" rings Silicone
TEFLON:
• Most commonly used seat materialfor food application. Has extensive chemical and temperature resistance.
• Not suitable for great temperature fluctuations: Teflon tends to coldflow and does not return to itsoriginal shape.
• Can be used as a coating on other elastomers.
• Useful temperature range: -30°F to 400°F
BUNA N:
• Nitrile compound provides an elastic seat that makes forleak-free, easy handling of valve. Least expensive elastomer.
• Good chemical resistance: excellent for use with petroleum solvents, gasoline, alcohol, etc...
• Recommendedlubricant: silicone
• Useful temperature range: -40°F to 225°F
SILICONE:
• Very good seat material, very elastic self-lubricating - provides a tight easy seal, reducing torque needed toclose the valves.
• Sensitive to certain chemicals: do not use with solvents, petroleum products, etc. (check with us for non-food usage)
• Useful temperature range: -85°F to450°F
EPDM:
• Good for steam and hot water to 350°F
• Good resistance to mild acids, dilute alkalis, silicone oils and greases, ketones and alcohol.
• Avoid use for petroleum oilsor di-ester base lubricants.
• Useful temperature range: -65°F to 300°F
VITON®:
• Both extreme temperature and good chemical resistance.
• Useful at high temperature whenbuna or EPDM is not suitable.
• Recommended lubricant: silicone
• Useful temperature range: -31°F to 400°F
Viton and Calrez are registered trademarks of DuPont Dow Elastomers.