Rubber hydraulic hose and ... - Flipbook - Seite 304
Fluid
Seals
Aluminum
Monel‡
Brass
Stainless steel
Urethane
Hytrel†
Steel
6
EPR
5
Viton*
4
Buna-N
3
Hose
Neoprene
Special application hose
EPDM
2
Thermoplastic elastomer
1
CPA (AQP)
E=Excellent
G=Good
C=Conditional
U =Unsatisfactory
Synthetic rubber (Nitrile)
Hydraulic fluids &
lubricating oils
PTFE
Safety information | Danfoss
Fluid compatibility
Metal
The following charts are a representative list of fluids and manufacturers.
The fluids are grouped under generic “family” heads and arranged
alphabetically. For each generic “family” listing we have included
maximum fluid temperature recommendations for the six hose
classifications on the next pages. Two maximum fluid temperature
ratings are listed under designations of “H” and “LP”. The “H” designation
is for hydraulic service up to the maximum rated operating pressure of
any particular hose in the classification. The “LP” designation is for lowpressure service such as lubricating oil systems or low-pressure hydraulic
return lines. The letter “U” in the box indicates unsatisfactory resistance
to the fluid type. Fluid temperature ratings are predicated on maximum
allowable ambient temperatures
as follows:
Trichlorethylene
U E U U - U U U U E U U E G E E E
Tricresyl
Phosphate
U E U U -
E U U E G U U E
Triethanolamine
G E U G -
E E U E U U U E U E E E
Tung Oil
E E C C - U G G U E U C E G E E E
Classifications 1 and 3
(Synthetic rubber and thermoplastic elastomer)
Turpentine
E E G G - U G U U E G G G G G G G
“H” fluid temp. ratings: +60°C (+140°F) ambient
Varnish
C E G G - U G U U E G G E G E E E
“LP” fluid temp. ratings: +82°C (+180°F) ambient
Vinyl Chloride
U E U U - U U U U E U U E U C E E
Water
(to +150°F)
E E E G -
E E E E E E E C G E G E
Classification 2 (PTFE)
“H” fluid temp. ratings: +204°C (+400°F) ambient
Water
(+151°F to +200°F)
C E U C -
E E E E E U U C G E G E
“LP” fluid temp. ratings: +204°C (+400°F) ambient
Water
(+201°F to +350°F)
U E U U -
E U U G G U U C G E G E
Classification 4 (CPE-AQP)
“H” fluid temp. ratings: +71°C (+160°F) ambient
Water Glycol
E E C E
E E E E E C C E E E G E
Water Petroleum
Emulsion2
E E C C - U E G U E C C C E E G E
(If “H” fluid temperature is +107°C (+225°F) or less, allowable
ambient temperature may be increased to +94°C (+200°F))
Xylene
U E C U - U U U U E U C E E E E E
Zinc Chloride,
10% aq
E E E E
-
E E E E E E E E U U C G
Ambient temperatures in excess of those recommended, in
conjunction with maximum fluid temperatures, can materially
shorten the service life of the hose.
Zinc Sulfate,
10% aq
E E
-
E E E E E
-
E
-
-
“LP” fluid temp. ratings: +121°C (+250°F) ambient
- U C G C G
Resistance key rating
E = Excellent – Fluid has little or no effect.
G = Good – Fluid has minor to moderate effect.
C = Conditional – Service conditions should be
described to Danfoss (Aeroquip and Winner)
for determination of suitability for application.
U = Unsatisfactory
This chart is intended for reference use only.
The information in this chart pertains strictly to material compatibility and is
not intended to be used as an application guide. For information on specific
applications not included in this catalog, please contact Danfoss Aeroquip
*Viton is a trademark of The Chemours Company FC, LLC.
†Hytrel is a registered trademark of E.I. du Pont.
‡Monel is a registered trademark of Special Metals Corporation group of
Companies.
Note 1 - Rubber-covered hose must be perforated to allow gas to escape.
Note 2 - Due to the widely different additives in these fluids, testing should
be done on the actual fluid being considered.
304
- C - G
Caution: The fluid manufacturer’s recommended maximum operating
temperature for any specific name brand fluid should be scrupulously
observed by the user. These recommended temperatures can vary
widely between name brands of different fluid compositions, even
though they fall into the same generic “family” of fluids. Exceeding the
manufacturer’s recommended maximum temperature can result in
fluid breakdown, producing by-products that are harmful to elastomeric
products, as well as other materials in the system. If a manufacturer’s
recommended maximum temperature for his specific fluid is lower than
that for the hose rating, it should take precedence over the hose rating
for service usage.
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