Cam & Groove Coupling Technical Information

"Snaplock" Brand

• Specification
• Working Pressures
• Material and Size Availability
• Threads
• Other End Fittings
• Certification
• Gaskets
• Handles, Rings & Pins

Specification

Snaplock, cam and groove couplings are capable of carrying gases, liquids, powders and granules. The applications for this ‘straight through’ coupling are limited only by the chemical compatibility of the material, the seal with the media being handled, and the working pressure requirement. Probably the simplest and most versatile quick coupling available. Interchangeable with other cam and groove products, originally made to MIL-C-27487.

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Working Pressures Max psi (bar)

These working pressures are given for ambient temperatures of 70°F, using Elastomeric seals. Higher temperatures and/or PTFE seals will reduce the pressure rating of the coupling. In the case of polypropylene, the maximum working temperature is 158°F(70°C) and at this temperature the working pressures below must be reduced by 40%.

Aluminum Cam and Groove Couplings are permanent mold cast which is a process that yields castings with a finer grain structure and better strength properties than those produced in sand casting and die casting.

Brass Cam and Groove Couplings are forged for 1/2“ to 3“ and sand cast for all other sizes.

316 Stainless Steel Cam and Groove Couplings are investment cast, also known as precision casting or lost wax process. SS316 is equivalent to DIN1.4404

Polypropylene Cam and Groove Couplings are manufactured from acid resistant 20% glass reinforced Polypropylene. Max temperature for Polypropylene is 160 degrees farenheit.

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Material and Size Availability

Those that are typically stocked, are shown in red

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Threads

All threads are NPT.

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Other End Fittings

Hose tails are double ribbed for metallic couplings, multi-serrated for Polypropylene. 

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Certification

Full DIN 3.1 certification is available, on our SS316 couplings, if requested at the time of the order and will be subject to special quotation and pricing.

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Gaskets

Standard gaskets for metallic and polypropylene couplings are BUNA N (Nitrile)

Dependant on applications, various seals such as Buna, EPDM, Viton, Teflon Buna, Teflon Viton, Neoprene and other specialty materials. FEP/Silicon fully encapsulated is also available.

Nominal size		BUNA	EPDM	VITON	NEOPRENE BLACK	TEFLON BUNA	TEFLON VITON
inch	mm	Code	Code	Code	Code	Code	Code
1"	13
3/4"	19
1"	25
1 1/4"	32
1 1/2"	40
2"	50
2 1/2"	65
3"	75
4"	100
5"	125
6"	150
Temp °F(°C)
Min		-40°F(-40°C)	-65°F(-54°C)	-20°F(-29°C)	-65°F(-54°C)	-40°F(-40°C)	-40°F(-40°C)
Max		199°F(93°C)	300°F(149°C)	399°F(204°C)	224°F(107°C)	224°F(107°C)	225°F(107°C)
Marking
Stripe/Dot		None	White	Red	Green	None	Red on Filler

 

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Handles, Rings & Pins

Stainless Steel Handles are standard on all Stainless Steel and Polypropylene couplings.

Spark-Proof Brass Handles are fitted as standard to all Aluminium and Brass Cam lock fittings.

Finger Rings are zinc plated mild steel on all sizes of Aluminium, Brass and Polypropylene couplings. Stainless Steel Rings are used on all sizes of Stainless Steel Cam and Groove fittings.

304 Stainless Steel Pins are standard to all types of Cam lock Couplings.
304 Stainless Steel Pull Rings are standard on SS316 and Polypropylene Cam lock Couplings.

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