Tech Centre

D&D Engineered Products Tech Centre

In need of useful information on our products? Check below for charts & other important info.

O-RING FLUID COMPATIBILITY
Click here for complete elastomer chemical compatibility on over 600 chemicals

O-RING SIZE CHART
Click here for the AS568 standard O-ring “Dash” size chart

ELASTOMER SHELF LIFE
ARP 5316 Elastomer Shelf Life Recommendation

In 1998, the Society of Aerospace Engineers (SAE ) issued Aerospace Recommended Practice (ARP) 5316. It was intended to fully replace MIL-HDBK-695C as the industry standard for the Shelf Life of Aerospace elastomeric seals. However, ARP 5316 can also be used as a useful guideline for the Shelf Life of many Industrial and commercial grade elastomers as well.

The information in ARP 5316, and the chart below, is intended to be utilized by those organizations who do not already have specific recommendations for the control of elastomeric seals. It should be noted that the packaging of the elastomeric seals prior to assembly into a product is an integral part of the controlled storage procedure. It provides a positive means of product identity from the time of manufacture, to the time of assembly.

ARP 5316 does not establish limitations for storage times in assembled components, nor does it in any way provide a guideline for the operating life span of a particular compound.

 

ELASTOMER FAMILY ASTM ABBREVIATION ARP 5316 RECOMMENDED SHELF LIFE
Aflas Unlimited
Butyl Rubber, Isobutylene Isoprene IIR Unlimited
Chloroprene (Neoprene) CR 15 Years
Epichlorohydrin (Hydrin) ECO N/A
Ethylene Acrylic (Vamac) AEM 15 Years
Ethylene Propylene, EPDM or EP EP Unlimited
Fluorocarbon (Viton) FKM Unlimited
Fluorosilicone FVMQ Unlimited
Hydrogenated Nitrile, HNBR or HSN HNBR 15 Years
Nitrile (Bune-N or NBR) NBR 15 Years
Perfluorelastomer FFKM Unlimited
Polytetrafluoroethlene (Teflon) PTFE N/A
Polyacrylate ACM 15 Years
Polyurethane (Poyester or Polyether) AU/EU 5 Years
Silicone VMQ Unlimited
Styrene Butadiene (Buna-S) SBR 3 Years

 

Tech CentreASME B16.20 STANDARDS
Spiraltec, Spiral wound gaskets are manufactured according to ASME B-16.20 standard which stipulates that an inner ring is required for all PTFE filled gaskets and for all class.

newspaper templates - theme rewards