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437 E70 FDA EPDM O-Ring 70 Duro


Quantity Discount Prices

  • Model: E70437
  • 4 in Stock
  • 6"ID X 6-1/2"OD X 1/4"CS
  • Actual: 5.975"ID X 0.275"CS
  • Metric: 151.77mm ID X 6.99mm CS
  • PDF Data Sheets

6"ID X 6-1/2"OD X 1/4"CS

FDA Compliant EPDM O-Rings:

Frequently used with foods, water, steam applications, phosphate ester type hydraulic fluids, brake fluids and offer great resistance to ozone and weathering. Sulfur-Cured FDA Grade EPDM is the least costly and provides the best tear and abrasion resistance compared to Peroxide-Cured Systems. EPDM's are not used with petroleum oils or fuels because significant swelling would result.

Chemical Resistance and Uses:

  • Hot water and steam up to 300°F (149°C) with special compounds up to 400°F (204°C)
  • Various Water / Municipalities Applications
  • Household Appliances
  • Glycol based brake fluids up to 300°F (149°C)
  • Many organic and inorganic acid
  • Cleaning agents, soda and potassium alkalis
  • Phosphate-ester based hydraulic fluids (HFD-R)
  • Silicone Oil and Grease
  • Many polar solvents (alcohols, ketones, esters)
  • Ozone, aging and weather resistant
  • Outdoor Applications
  • Electrical Insulators
  • EPDM rubber is used in extreme cold environment applications

EPDM is not recommended for:

  • Mineral oil products (oils, greases and fuels)
  • Solvents
  • Aromatic Hydrocarbons.
  • Liquefied Petroleum Gas (LPG)
  • Lubricating Oils, Petroleum Base
  • Gasoline

Compound Info:

  • Ethylene Propylene, EPDM, or EP (EP)
  • Color: Black
  • Duro: 70
  • FDA: Yes, Meets the FDA standard requirements for food-handling applications.
  • ASTM D2000 Grade M5CA710 A25 B35 C32 EA14 F17 G21
  • FDA CFR 177.2600
  • Designed to meet or exceed the properties of these popular EPDM Compounds:
    • E603-70, E300-70, E1028-70, 3077, E14, E17016, 5601-70 and 559N

Operating temperature: -65° to +300F° 

  • (max. 400°F (204°C) in water and/or steam)
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Stock O-Rings in over 20 different compounds and durometers the following six are the standard rubber materials in a range of durometers (Shore A) hardness to satisfy practically any service condition:

Viton® O-Rings / FKM: Fluorocarbon (Viton®) exhibits exceptional resistance to chemicals, oils, temperature extremes (-13°F to +446°F), low compression set, low gas permeability and excellent aging characteristics. Applications include: aircraft engines, automotive fuel handling systems, and chemical processing industries. FKM is also suitable for high vacuum applications. It is not recommended for exposure to ketones, alkalis, and Skydrol® fluids. Custom compounds are available with improved chemical and low temperature resistance.
AS-568 Viton® O-Rings | Metric Viton® O-Rings

Buna-N O-Rings / Nitrile O-Rings / NBR: Nitrile (Buna-N) is the most widely used elastomer due to its excellent resistance to petroleum products, operating temperature range (-40°F to +257°F) and one of the best performance-to-cost values. It's an ideal material for aerospace, automotive, propane and natural gas applications. Special Hydrogenated Nitrile (HNBR) compounds can improve resistance to direct ozone, sunlight, and weather exposure while increasing temperature range to +300°F.
AS-568 Buna-N O-Rings | Metric Buna-N O-Rings

Ethylene-Propylene / EPDM O-Rings: EPDM has outstanding resistance to heat, water and steam, alkali, mild acidic and oxygenated solvents, ozone, and sunlight (-40ºF to +275ºF); but it is not recommended for gasoline, petroleum oil and grease, and hydrocarbon environments. This popular rubber compound is usually the first choice for low torque drive belt applications.
AS-568 EPDM O-Rings | Metric EPDM O-Rings

Fluorosilicone O-Rings / FVMQ: Fluorosilicone (-75º to +400ºF) combines the good high and low temperature stability of silicones with the fuel, oil, and solvent resistance of fluorocarbons. FVMQ is unparalleled for aerospace fuel systems, auto fuel emission control systems and to meet or exceed government, military, aerospace, automotive, industrial and commercial specifications. However, due to relatively low tear strength, high friction and limited abrasion resistance of these materials, they are generally not used in dynamic applications. They are also not recommended for exposure to brake fluids, hydrazine, or ketones.
AS-568 Fluorosilicone O-Rings | Metric Fluorosilicone O-Rings

Silicone O-Rings / VMQ: In the Silicone family, you will find compounds which are superior as static seals in extreme temperature conditions. Standard compounds handle operating temperatures -85º to +400ºF. Silicone compounds are popular in food and medical applications because they are very clean and do not impart odor or taste. Special Phenyl silicones can be used down to -148°F.
AS-568 Silicone O-Rings | Metric Silicone O-Rings

Neoprene® O-Rings / CR: Neoprene (-40º to +250ºF) is reasonably priced and features good resistance to petroleum oils, ozone, sunlight and oxygen aging, relatively low compression set, good resilience and outstanding physical toughness. It is the preferred sealing material for the refrigeration industry because of its resistance to ammonia and Freon®.
AS-568 Neoprene® O-Rings