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PT Coupling Company
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P.O. Box 3909
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Enid, OK 73702
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Tol l-Free: (800) 654-0320
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Tol l-Free Fax: (800) 828-2649
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Fax: (580) 237-3435
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info@ptcoupl ing.com
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www.ptcoupl ing.com
PT Coupling Company does not recommend cam and groove
fittings for any compressed gas service, which includes air and
steam service.
CAM AND GROOVE MAXIMUM ALLOWABLE WORKING PRESSURES (MAWP)
METAL COUPLINGS
NONMETAL COUPLINGS
Size
MAWP (PSI)
Size
MAWP (PSI)
.5" through 2.0"
250
.5" through 2.0"
100
2.5" and 3.0"
200
2.5" through 4.0"
50
4.0”
150
5.0" and 6.0"
75
8.0" through 12.0"
50
Note:
Above maximum allowable working pressures are based on operating
temperatures less than 100°F. If operating temperatures exceed 100°F, use tem-
perature derating factor from table below. Locate the correct factor from the
table below and multiply this by the appropriate MAWP (psi) above for the ele-
vated temperature working pressure.
Example:
2" Alum. at 250°F = 250 psi x .84 = 210 psi at elevated temperature.
T E M P E R AT U R E D E R AT I N G F A C T O R S
Temp. Alum. Brass Stain Duct. Carbon. Hast.
Carp. Monel Poly. Nylon
(deg F)
Steel
Iron Steel
C 20
*Min. -150 F -150 F -150 F -20 F -20 F -150 F -150 F -150 F -15 F -30 F
100 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
150 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.80 0.90
200 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 NR 0.60
250 0.84 1.00 1.00 1.00 1.00 1.00 1.00 1.00 NR 0.40
300 NR 0.97 1.00 1.00 1.00 1.00 1.00 1.00 NR NR
350 NR 0.95 1.00 1.00 1.00 1.00 1.00 1.00 NR NR
400 NR 0.92 1.00 1.00 1.00 1.00 1.00 1.00 NR NR
450 NR 0.90 1.00 1.00 1.00 1.00 1.00 1.00 NR NR
*500 NR NR 1.00 1.00 1.00 1.00 1.00 1.00 NR NR
NR = Not Recommended
* These temperatures represent the extremes that can be handled by current
gasket materials.
MAT E R I A L S AVA I L AB L E F OR SP E C I A L US E S AR E :
MONEL
ALUMINUM ANODIZED
ALLOY 20
TEFLON LINED
HASTELLOY C, C22
TITANIUM
OTHERS PER REQUEST
These listings are not exclusive — please contact us for parts engineered
to fit your needs.
All PT cam and groove couplings in every metal and size through
6”parts are manufactured to Federal SpecificationA-A-59326.
Conformance to this specification allows complete interchange-
ability. Couplings not interchangeable in the industry are sizes 8”
and above.No standards are established for these sizes.
Our quality management system is certified and conforms to the
requirements of ISO9001.
Accessories
CAMARMGUARANTEE:
PT Cam arms are guaranteed against
breakage. If a cam arm breaks during normal use, just return it to
the branch warehouse in your region for replacement.
GASKETS:
Standard gaskets are Buna N.Any variation must be
specified.
GASKETS AVAILABLE AND THEIR PROPERTIES
Compound
Material
Color Code Min. Temp. Max. Temp.
Color
Stripe
Range °F Range °F
Buna N (std.)
Black
Blue
-65
275
Buna N (Fuel Resist.)
Black
Two Blue
-65
275
Buna N (Hot Oil)
Black
Two Orange
-65
275
Neoprene
Black
White
-65
275
Viton
Green
N/A
-40
400
Thiokol
Black
Yellow & Green
-65
225
Natural Rubber
Tan
N/A
-65
250
White Nitrile (Food)
White
N/A
-65
275
Silicone
Rust
N/A
-150
500
Hypalon
Black
White & Red
-65
250
EPDM
Black
Yellow
-65
300
EPDM (Fire Hose)
Black
Red or Yellow -65
300
Teflon Envelope
White Translucent
N/A
Neoprene Filler
Black
White
-65
275
Buna Filler
Black
Blue
-65
275
Viton Filler
Black
Green
-40
400
EPDM Filler
Black
Yellow
-65
300
Teflon Encapsulation Transparent
N/A
Silicon Filler
Rust
N/A
-75
450
Viton Filler
Black
N/A
-40
400
LIMITEDWARRANTY
PT Coupling Company warrants its products to be free
of defects in material and workmanship, and in accordance
with the specifications listed. It is the buyers responsibility
to perform testing before selection of product.Abuse or
misapplication voids this warranty.
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INDUSTRAL
HOSE ASSEMBLY
SPECIFICATIONS
GUIDELINES
$50