SAFETY INSTRUCTIONS
Installation
The PT Coupling line of quick connect/disconnect couplings comes with a wide range of fittings including threaded, hose connection and flanged end. These couplings have been engineered to meet specific requirements with safety margins.
IT IS THE RESPONSIBILITY OF THE END USER TO COMMUNICATE TO THE DISTRIBUTOR, THE APPLICATION AND OPERATING CONDITIONS THE COUPLING WILL BE SUBJECTED TO. IT IS UP TO THE DISTRIBUTOR TO SUPPLY THE CORRECT COUPLING FOR THE APPLICATION. PT COUPLING IS AVAILABLE TO HELP YOU WITH A PROPER COUPLING RECOMMENDATION.
For the type of application required, care must be taken to ensure proper connection and a positive seal. Improperly fitted or applied connections can result in serious accident and/or downtime. Under no circumstances shall the recommended pressure rating of the couplings be exceeded.
OPERATION
PT Coupling couplings provide for quick and frequent connection by means of the camming action on the groove surface of the male adapter. The male adapter is simply inserted into the female coupler until contact is made with the gasket. Both cam arms on the coupler are then closed simultaneously to produce a uniform gasket compression between the seal surfaces.
The compression on the gasket produces a seal when torque is applied to the cam arms. A positive seal requires that the surfaces on the gasket seat, the adapter face, and the gasket are smooth and uncontaminated. Cam arms must be in the full closed position for proper locking of coupling.
Gasket deterioration and excessive wear on cam, groove, and seal surfaces can reduce the performance of the coupler. Periodic inspection and servicing will ensure an efficient and safe performance.
Maintenance
Couplings should be well-maintained and inspected, particularly when the conditions of service include high working pressure and/or transfer or storage of hazardous materials. Periodic inspection and testing will detect signs indicating deterioration, damage, or loss of performance before failure.
GASKETS:
The recommended seal material for a particular application has its limitations. Initial installation of a seal material should be followed by frequent inspections. This will help establish the routine inspection and service cycle.
Replacement is required when gasket becomes hard, brittle, or otherwise loses the characteristics required to perform in the intended manner.
COUPLERS:
Periodically check seal surfaces on both coupler and adapter for signs of wear or corrosion. The adapter should be checked for excessive wear on the groove surface where contact is made with cam arms.
Cam arm and pin should also be periodically inspected for excessive wear. Worn or otherwise damaged cam arms and pins can prevent the coupler from operating in the intended manner.
To replace worn cam arm and pin, remove cam pin with hammer and punch. Install properly selected new cam arm and pin making sure the cam arm is positioned in the proper direction. The cam arm handled should always be pointed away from the female end of the cam and groove connection when the arm is in the closed position. Safety goggles should be worn during this procedure.
.png)
Recommended Operating Conditions (Domestic)
PT Coupling does not recommend cam and groove fittings for any compressed gas service, which includes air and steam service.
Material |
Gasket |
Size |
Max. Allowable Working Pressure [MWAP] (PSI)* |
Heavy Duty Max. Allowable Working Pressure [MAWP] (PSI) |
| Metal Couplings / Fittings | Standard Gaskets are Buna, any variation must be specified | 1/2", 3/4 x 1/2", 3/4", 1", 1-1/4", 1-1/2", 2" | 250 | 500 |
| 2-1/2", 3" | 200 |
400 |
||
| 4" | 150 |
300 |
||
| 5", 6" | 75 |
150 |
||
| 8", 10" 12" | 50 |
N/A |
||
| Non-Metal Couplings | Standard gaskets are Buna N any variation must be specified. | 3/4", 1", 1-1/4" 1-1/2", 2" | 100 |
N/A |
| 3", 4" | 50 |
N/A |
*NOTE: Above maximum allowable working pressures are based on operating temperatures less than 100°F. If operating temperatures exceed 100°F, use temperature derating factor from table below.
Locate the correct factor from the table in the "Temperature Derating Factors" table and multiply by the appropriate MAWP (psi) in the "Recommended Operating Conditions" table for the elevated temperature working pressure.
- EXAMPLE: 2" Alum. at 250°F = 250 psi x 0.84 = 210 psi at elevated temperature.
Temperature Derating Factors
| Temp. (° F) |
Alum. | Brass | Stainless Steel | Ductile Iron | Carbon Steel | Hast. C® | Carp. 20® | Monel® | Poly | Nylon |
| *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 | NR | 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 | NR |
| 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.
All registered trademarks are property of their respective owners.
Gaskets
PT Coupling's Standard Gaskets for Cam & Groove Fittings are Buna N.
GASKETS AVAILABLE AND THEIR PROPERTIES |
||||
| Compound | Material Color | Color Code Stripe | Min. Temp. Range °F | Max. Temp. Range °F |
| Buna N (standard) | Black | Blue | -65 | 275 |
| Buna N (Fuel Resistant) | Black | Two Blue | -65 | 275 |
| Buna N (Hot Oil) | Black | Two Orange | -65 | 325 |
| Neoprene | Black | White | -65 | 275 |
| FKM | Green | N/A | -40 | 400 |
| FKM | Black | Green | -40 | 400 |
| Thiokol® | Black | Yellow & Green | -65 | 225 |
| Natural Rubber | Tan | N/A | -65 | 250 |
| White Buna (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 |
| PTFE Enveloped | White Translucent | N/A | N/A | N/A |
| Neoprene Filler | Black | White | -65 | 275 |
| Buna Filler | Black | Blue | -65 | 275 |
| FKM Filler | Black | Green | -40 | 400 |
| EPDM Filler | Black | Yellow | -65 | 300 |
| PTFE Encapsulation | Transparent | N/A | N/A | N/A |
| Silicone Filler | Rust | N/A | -75 | 450 |
| FKM Filler | Black | N/A | -40 | 400 |
All registered trademarks are the property of their respective owners.
Recommended Operating Conditions (PT PAC)
The following table is related to the PT PAC / Import products.
PT PAC/IMPORT PRESSURE RATINGS |
|
| Size | Max. Allowable Working Pressure [MWAP] (PSI)* |
| 1/2" through 2" | 250 |
| 2-1/2" | 150 |
| 3" | 125 |
| 4" | 100 |
| 5" through 6" | 75 |
| 8" | 50 |