TEFLON:

• Most commonly used seat material for food application. Has extensive chemical and temperature resistance.
• Not suitable for great temperature fluctuations: Teflon tends to coldflow and does not return to its original 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 for leak-free, easy handling of valve. Least expensive elastomer.
• Good chemical resistance: excellent for use with petroleum solvents, gasoline, alcohol, etc...
• Recommended lubricant: 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 to close 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 to 450°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 oils or di-ester base lubricants.
• Useful temperature range: -65°F to 300°F

VITON®:

• Both extreme temperature and good chemical resistance.
• Useful at high temperature when buna or EPDM is not suitable.
• Recommended lubricant: silicone
• Useful temperature range: -31°F to 400°F