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Parker Hannifin Corporation

Parflex Division

Ravenna, Ohio

280

Hydraulic &

Pneumatic

Hose & Fit.

PTFE

Hose &

Fittings

Thermoplastic

Tubing

Coiled Air Hose,

Fittings

& Accessories

Truck (Fleet)

Products

Tooling &

Equipment

Hose

Accessories

Technical &

Design

Information

Approvals &

Guides

Alphanumeric

Index

O-Ring Selection

O-Ring Material Selection

StandardO-ringssuppliedwithParker tubefittingsandadapt-

ersare90durometer hardnitrile (Buna-N) Parker compound

#N0552. These O-rings are well suited for most industrial

hydraulic and pneumatic systems. They have high extrusion

resistancemaking themsuitable for veryhighpressurestatic

applications.Optional hightemperaturefluorocarbon,Parker

compound #V0894, is also available for higher temperature

specifications.

Table U6 — O-Ring Selection

1) These Parker “Chromassure” color assurance O-rings are available from the Parker Hannifin O-Ring Division. They

help eliminate assembly errors, reduce warranty costs and liability risks, and assure safety in aftermarket business.

2) Formerly SAE Type I.

3) Formerly SAE Type II.

4) Formerly SAE Type III.

5) “FKM” is the ASTM designation for fluorocarbon. Its ISO designation is “FPM”.

6) Standard compounds available from stock.

7) Use 90 durometer hard O-rings for applications with 1500 PSI or higher pressures.

O-rings for other than normal hydraulic media or higher

temperature applications can be selected from the follow-

ing chart. The chart should be used only as a general guide.

Before making final selection for a given application, it is

recommended that appropriate tests be conducted to assure

compatibility with the fluid, temperature, pressure and other

environmental conditions.

For fluids not shown in the chart, please contact the Tube

Fittings Division.

Polymer

Abbreviated

Name

Parker

Compound

No.

Color

SAE

J515

Type

Hardness

Shore

“A”

Temperature

Range

Recommended

For

Not

Recommended

For

Nitrile-Butadiene

(Low compres-

sion

set)

Nitrile-Butadiene

NBR

N0552

N0674

N0103

N1059

N0507

N0304

N0508

N0756

Black

–

-30° to 250° F

-65° to 225° F

-30° to 275° F

-65° to 180° F

-65° to 225° F

-35° to 250° F

-65° to 275°F

Petroleum base oils and

fluids, mineral oils, ethylene

glycol base fluids, silicone

and di-ester base lubricants,

air, water under 150°F, and

natural gas.

Hydrogen fuel cells.

Meets FDA requirements for

food products.

CNG Applications

Phosphate ester base

hydraulic fluids, auto-

motive brake fluids,

strong acids, ozone,

freons, ketones, halo-

genated hydrocar-

bons,

and methanol.

Ethylene-Pro-

pylene

Ethylene-Pro-

pylene

Ethylene-Pro-

pylene

EPDM

E0540

E0893

E0962

Black

Pur-

ple

Black

–

-65° to 275° F

Phosphate ester base

hydraulic fluids, hot water,

steam to 400°F, silicone oils

and greases, dilute acids

and alkalis, ketones,

alcohols and automotive

brake fluids.

climate control systems.

Petroleum base oils

and di-ester base

lubricants.

Neoprene

C0873

C0944

Black

Red

–

-45° to 250° F

Refrigerants (freons, am-

monia), high aniline point

petroleum oils, mild acids,

and silicate ester lubricants.

Phosphate ester

fluids and ketones.

Fluorocarbon

FKM

FPM

V0747

V0884

V0894

Black

–

-15° to 400° F

Petroleum base oils and

fluids, some phosphate ester

base fluids, silicone and

silicate ester base lubricants,

di-ester base lubricants,

acids and halogenated hydro-

carbons.

Ketones, skydrol flu-

ids, amines (VDMH),

anhydrous ammonia,

low molecular weight

esters and ethers,

and hot hydroflu-

oric or chlorosulfonic

acids.

Silicone

S0604

Rust

–

-65° to 450° F Dry heat (air to 400°F) and

high aniline point oils.

Most petroleum

fluids,

ketones, water and