The properties of any application are vital in considering the right seal. From atmosphere considerations to fluid pressure, elastomer hardness and other variables, Vedovell offers you the following information to assist you with the selection of your seal.

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GENERAL ELAST0MERIC PROPERTIES
TEMPERATURE RANGE CHART
DUROMETER CHART
C0MPARIS0N 0F PR0PERTIES CHART

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FLUID C0MPATIBILITY TABLES Page (2.1 - Acetaldehyde to Freon 12)

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(2.2 - Fuel Oil to Wood Oil)

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ASTM COMPOUND CONVERSION KEYS
CONVERSION FROM ASTM D735 D-SAE J114 TO ASTM D2000-SAE J200
AGE RESISTENT CONVERSION KEY
GL0SSARY


ASTM COMPOUND CONVERSION KEYS

Natural and Synthetic Rubber Compounds Identification
Prefix-Type	1st Number "A" Durometer Hardness	Next 2 Numbers Tensile Strength	Suffix - Characteristics
RN - Natural Rubber	3=30±5	05=500	A - Heat Aging	H - Flexing
S - Synthelic non-oil resistance Usually GRS	4=40±5	10=1000	B - Compression set	J - Abrasion
SA - Very low oil swell Usually Thinkol	5=50±5	15=1500	C - Weather resistance	K - Adhesion
SB - Low oil swell Usually Buna N	6=60±5	20=2000	D - Load deflection	L - Moisture absorption
SC - Medium oil swell Usually Neopene	7=70±5	25=2500	E - Oil immersion	M - Flame resistance
TA - Heat and cold resistance	8=8±5	30=3000	F1 or F -40ºF cold	N - Impact P - Staining
TB - Heat and oil resistance Usually Polyacrylate	9=90±5	35=3500	F2 or FF -60ºF cold G-Tear	R - Resilience Z - Special requirements as noted

CONVERSION FROM ASTM D735 D-SAE J114 TO ASTM D2000-SAE J200

Conversion of Suffix Letters ASTM D735- SAE J14 ASTM D2000- SAE J200 A1 B C D E1 E3 F1 F2 G H K1 K2 L M N P R Z A14 B13, B14, B36, or B17 C20 D11 E14 or E16 E34 or E36 F17 F19 G11 orG21 H K11 K31 L14 N N P R Z

Examples of Specification Conversions
ASTM D735-SAE	ASTM D2000-SAE J200
R420B SB620B SB620E3 R515 SC520 SB510	4AA420A13B13 2BG620B14 2BG620E34 4AA515A13 2BC520A14 BG510

S.A.E. (Society Automotive Engineers) A.S.T.M. D735-S.A.E. J14 (American Society Testing Materials)



AGE RESISTENT CONVERSION KEY

Age resistance generally associated with products fabricated from various rubber.

Maximum (Up to 20 Years)
Type of Rubber	Common or Trader Name	ASTM D1418 Abbreviation	ASTM D2000 Designation	MIL-STD-417
Silicone Fluorosilicone Polysulfide Florocarbons Polyacrylate	Silicone Silastic LS Thickol Flurel, Viton¨ Acrylic	Q FVMQ T FKM ACM, ANM	FE FK BK HK DF, DH	TA TA SA - TB

AF : Air Force

AMS : Aerospace Material Specification

AN : Airforce-Navy

AS-568A : Aerospace Standard Uniform Dash Numbering system for o-rings

Clearance, Diametral : The difference in diameters of two surfaces to be sealed

Cross-Sectional Dia (C/S) : One half the difference between the ID and OD of an o-ring (W)

Dynamic Seal : An application where an o-ring is to seal two parts which are in motio

Elongation : Percent of stretch before breaking

Extrusion : The extension, under pressure, of a portion of an o-ring into the clearance between mating parts

Face Seal : An application where an o-ring seals in a plane perpendicular to its axis

Flash : Excess rubber left around an o-ring at mold parting lines

Gland : Seal assembly, including o-ring, groove and contacting surfaces

Groove : The recess into which an o-ring is fitted

Hardness : Property usually measured with a Shore A Durometer. A reading of 40 is soft, 90 is hard

ID : The inside diameter of an o-ring

MIL : Military

Modulus : Stress at 100% elongation

MS : Military Standard

OD : The outside diameter of an o-ring

SAE : Society of Automotive Engineers

Seal : An o-ring that prevents fluid flow

Set, Compression : Permanent distortion of an o-ring after compression

Squeeze : Cross-sectional compression of an o-ring

Static Seal : An o-ring designed to function between parts having no relative motion, a gasket

Tensile : The pulling strength before breaking, measured in pounds per square inch

W : The cross-sectional diameter of an o-ring(C/S)

Hypalon(R) and Viton(R) are registered trademarks of DuPont Dow Elastomers.