Camlock Couplings Fittings Overview

Pro Flow Dynamic, LLC http://www.proflowdynamics.com [email protected] 1-888-875-FLOW

Overview on Camlock Couplings and Cam lock Fittings:

Cam and groove couplings are also called cam lock fittings. These are quick connect couplings

commonly used in various industries as a hose connection to prevent leakages. The coupling is

well-known because it is an easy and inexpensive way of connection, re-connection or

disconnecting.

Cam and grove couplings can be used in a system in which filing

of chemical drums is required. These can be utilized by factories

that require paint, dye and ink medium transfers. The couplings

are generally used wherein frequent modifications of hoses are

necessary for an appropriate mix. Even cam and groove couplings

are useful for petroleum trucks.

Pro Flow Dynamics, LLC - Camlock Coupling and Fittings Supplier

http://www.proflowdynamics.com/

http://www.proflowdynamics.com/cam-and-groove-couplings.html


Standards

Federal Mil A-A-59326A

The standard for camlock fittings is based on the specification of the US Military i.e. Mil-C-

27487. Mil-C-27487 assigned the methods, dimensions, inspection procedures, materials,

pressure ratings and tolerances. In 1998, the actual Mil-C-27487 specification was changed by

another Federal Military standard: A-A-59326A. The Federal Mil A-A-59326A offers complete

guarantee for the exchangeability of cam and groove couplings designed to the similar

specification.

DIN 2828

Couplings designed to DIN 2828 are exchangeable with those which designed to the actual

MIL-C-27487 standard. However, vary in terms of part number, thread and hose tail design. A

flat thread seal is added to the female threaded parts and a smooth hose shank following by

DIN 2817 is added to the RK safety clamps complying with the DIN 2817.

EN 14420-7

The European standard coupling (EN 14420-7) is official approved by CEN and useful for cam

and groove couplings designed to American “military specification” A-A-59326A / MIL-C-

27487. However, the American standard coupling does not apply to the connection side and

just to the coupling side. However, the other parts such as seals, rings, levers and bolts are not

interchangeable.





Types of Cam & Groove Couplings:

TYPE A: An adapter with the female thread popular standard of thread is NPT or BSP

TYPE B: A coupler with the male thread popular standard of thread is NPT or BSP

TYPE C: A coupler with hose barb





TYPE D: A coupler with the female thread popular standard of thread is NPT or BSP

TYPE E: An adapter with shank





TYPE F: An adapter with the male thread poplar standard of thread is NPT or BSP

TYPE DP: A dust plug

TYPE DC: A dust cap





Operation to Connect:

1. In order to start, you first need to open the coupling by

pulling back its locking lever. Do this process from the top

cam handles while moving the handles away from the

coupler.

2. Now you can insert its adaptor into the cam and grove

coupler.

3. Close the coupler by turning the cam handles. Make sure

the arms are closed in the direction of the coupler and then

lock it once the handles get closed.

4. If you want more security, insert the clip from holes above

cam handles. The line pressures move the adaptor and

coupler independently and increase the pressure on the

face of coupling. During normal conditions, the safety locks

are not required but these are essential. The coupler and

the adaptor are created to enhance the fluid turbulence and

the abrasion from dry items while connected.





Operation to Disconnect:

1. Before disconnecting, ensure that the hose coupling is completely depressurized.

2. To open the coupler, pull back its locking lever over the top of cam handles while

turning handles away from the coupler.

3. Take out the adaptor from the cam lock coupler.

4. Close the coupler by lowering cam handles. Lock the coupler when it is not in use that

can protect from any accident or damage.





Features:

1. Quality assurance by Pro Flow Dynamics brand of

camlock couplings

2. Stainless steel triangular handles, safety pin and

ring are standard on each material version.

Handles designed by investment casting.

3. Safety couplers can be found with monoblock

safety body.

4. Holes for inserting the safety pin.

5. Seals can be found in PTFE/FPM, NBR (standard),

PTFE/EPDM, EPDM, FEP/Silicone, FEP/Silicone,

PTFE and FPM.

6. Marked with the material identification:

Polypropylene, brass, aluminum and stainless

steel.

7. Marked with cam and groove type/part number.

8. DIN (Deutsche Industrie-Norm) or MS (Military

Specification)

9. Reinforced coupling section for the increased

mechanical strength

10. Marked with diameter

11. Long hose shank for the secure fixing





Industries Where Cam and Groove Couplings Are Used:

Agriculture irrigation

Food and beverage

Oil and refinery

Fire control

Construction

Chemical

Colliery

Sanitary

Water treatment





Application

Cam and groove couplings are used for hose-to-pipe or hose-to-hose / manifold connection for

transferring of liquids.

Working Pressure

INCH 1/2" 3/4" - 2" 2.1/2" 3" 4" 5" 6" 8"

Working Pressure Bar Psi Bar Psi Bar Psi Bar Psi Bar Psi Bar Psi Bar Psi Bar Psi

Brass 11 150 18 250 11 150 9 125 7 100 5 75 5 75 - -

Bronze - - 18 250 11 150 9 125 7 100 - - - - - -

Aluminum 11 150 18 250 11 150 9 125 7 100 5 75 5 75 5 75

Stainless Steel 11 150 18 250 16 225 14 200 7 100 7 100 7 100 3 50

Temperature Range

The above mentioned working pressure refers to the ambient temperature through

elastomer seals. PTFE seals or higher temperatures will decrease the rated coupling

pressure as well. The maximum working temperature for polypropylene is 70°C / 160°F,

at which point the above mentioned temperature should be decreased by 40%. Seal,

assembly, coupling and hose methods can be selected in relation with the appropriate

temperature range and application.





Material

Pro Flow Dynamics cam and groove couplings can be found in the following materials:

Aluminum: 380

Stainless steel: AISI 316 - EN 1.4401

Brass: C85700

Polypropylene: Pro Flow Dynamics’s polypropylene cam and groove couplings contain

25-30% fiberglass reinforcements

Production Method

Different sizes of brass couplings are sand cast or shell-molded. The right type of aluminum is a

sand cast 713-T5 alloy, which can be anodized, if necessary. Stainless steel couplings are

investment-cast in a wide range that can be found in different sizes and electro-polished for

various applications. The standard for stainless steel quality for cam and groove couplings is

AISI 316-EN 1.4401. Polypropylene couplings are designed from the polypropylene reinforced

with 25-30 percent acid-resistant fiberglass.





Materials & Sizes

INCH 1/2" 3/4" - 2" 2.1/2" 3" - 4" 5" - 4" 6"

ND 13 20- 50 65 75 - 100 125-150 200

Brass

Bronze

Aluminum

Stainless Steel

Polypropylene

Available

Not Available

Materials

Seal:

Closed Seal

VLXPSG closed cam and groove seals are made for severe chemical applications. They combine

suitable properties of 2 diverse materials; the chemical resistance offered by the FEP

encapsulation and the rubber silicone core. Encapsulation of the Silicone core makes sure

better operational safety, when it is compared with an open envelope seal. In order to

produce VLXPSG seals, there is no need to use animal derived ingredients such as ADI free.

This decreases the risk of BSE prion contamination. The closed cam and groove seal resists

high temperature operation: between from -60°C / -76°F up to 204°C / 399°F.





Closed Envelope Seal

Closed envelope seal eliminates every contact between the seal core and chemicals. The fully-

closed PTFE envelope entirely encapsulates the FPM. Its maximum temperature is 200°C /

392°F.

Open Envelope Seal

Open envelope seal comprises a square-section EPDM core and a U-section PTFE envelope.

The methods of construction for an open envelope seal ensure exceptional compression

properties. PTFE envelope permits the seal to withstand the temperature up to 200°C / 382°F.





Standard Seal

Standard cam and groove seals comprise of a standard square-section that can be found in:

CSM

NBR - Silicone free (standard for different materials, apart from polypropylene)

FPM

EPDM (standard for material polypropylene)

Thread Seal

Female threaded adaptor and coupler components complying with DIN 2828 / EN 14420-7

standards include a thread seal. Female threaded cam and groove couplings are sealed

through screwing a male BSP / NPT thread up to the thread seal. Such seals can easily be found

in: PTFE – PUR





Threads

There are three common types of threads commonly used for cam and groove couplings:

NPT = National Pipe Taper

BSPT = British Standard Pipe Taper

BSP = British Standard Pipe

Assembly

Safety clamps

Worm drive clamps

RKP safety clamps to EN-14420-3 / DIN 2817

RK safety clamps to EN-14420-3 / DIN 2817





In Europe, BSPT and BSP threads are normally used instead of NPT treads. NPT treads are

commonly American threads. As a number of American industrial products and machines are

exported to the European markets, such couplings with NPT threads are regularly required.

The major difference among the above mentioned threads is the method of using seals.

THREAD DESCRIPTION STANDARD TYPICAL CALL OUT

SEALING METHOD PROPERTIES

BSP British Standard Pipe

EN ISO 228-1

G1 Parallel thread 55° degree thread angle

DIN ISO 228-1 Pressure tight joint is obtained with a seal oro-ring

Trucation of rood and crest are round

Diameter measured in inches

BSPT British Standard Pipe Taper

EN 10226-1 R1 Conical thread 55° degree thread angle

DIN 2999-1

Pressure tight joint is achieved by the thread


BSPP British Standard Pipe Parallel

G 1(cyl) Cylindrical thread 55° degree thread angle


NPT National Pipe Taper NSI B 1.20.1 NPT 1 Conical thread 60° degree round angle

Pressure tight joint is achieved by the thread

Trucation of rood and crest are flat





Cam and Groove Threads

COUPLING TYPE STANDARD On Request

ADAPTOR Female threaded

A NPT ANSI B 1.20.1

EN ISO 228-1/ DIN ISO 228-1 BSP

Male threaded

F

NPT ANSI B 1.20.1

EN 10226-1 / DIN 2999-1 BSPT

COUPLER Female threaded

D NPT ANSI B 1.20.1

EN ISO 228-1/ DIN ISO 228-1 BSP

Male threaded

B

NPT ANSI B 1.20.1

EN 10226-1 / DIN 2999-1

BSPT

Testing

Here are some aspects of cam and groove couplings, tested in-house:

Impact resistant

Adaptor and coupler dimensions

Thread dimensions

Material quality

Seal properties

Handle strength





Material Quality

The determination of materials used in cam and groove couplings is done through an in-house

spectroscope. The spectroscope examines the specific quality of coupling materials. So, we

guarantee our customers that the used materials comply with only the appropriate standard.

Adaptor & Coupler Dimensions

Dimension Gauges

The adaptor coupling’s shape allows the interchangeability of the coupler parts. There are

some specific designed gauges which can be used for measurement systems. Using test gauges

minimizes examination duration, simultaneously ensures the best interchangeability and

properly maintains seal properties while employing designed seals like envelope seals. Both

gauges are employed in different dimensions; first one is small and second one is large. In first

stage, the small gauge is passed through the top of the adaptor section. In case this cannot

pass, the top of the adaptor will fall within the permissible tolerances.

High-Technology Measuring Tools

With the help of high-technology measuring equipment, you can measure particular

dimensions of cam and groove couplings ensuring the compliance with the required

dimensions under German DIN 2828, European EN 14420-7 and Federal Mil A-A-59326A

standards. Though normal measuring systems do not give trustable dimensions, we provide

high-technology measuring tools that are capable of measuring complex cam and groove

shapes and positions.





Safety Precautions for Cam-Lock Couplings:

Make sure you use the handle locking device

Low pressure connection

Pressurized media produces risky conditions. It is important to tie-off ends of the hose

to guard against any accidental separation of lines and also avoid bucking or whipping of

the hose.

The match product should be conveyed with appropriate alloy couplings.

Fluidized dry items are more abrasive than liquids. In such applications, it is necessary to

frequently check the couplings for excessive wear and these should be replaced

whenever required.

Pressure test the hose assembly before application, it ensures the leak-free and tight

assembly of clamp, coupling and hose.

Handle Strength

Pro Flow Dynamics handles are made to resist a wide variety of applications for different

industries. Each standard handle is triangular and investment-cast in section. The triangular

section and method of product guarantee high-quality mechanical properties. Pro Flow

Dynamics handles offer improved test results than other companies involved in this

profession.

Seal Properties

After the chemical structure, seal compression set provides the significant effects on seal of

cam and groove couplings. An appropriate seal of hardness will make sure that cam and

groove couplings are properly sealed. The hardness of cam and groove is estimated through a

durometer.





Impact Resistance

Pro Flow Dynamics couplings are tested and trusted. Our couplings are impact resistance

tested which ensure to provide great reliability.

Thread Dimensions

Each cam and groove thread is tested through thread gauges. We offer gauges for all

standards and dimensions.

Coatings

At times standard cam and groove coupling materials such as stainless steel are not resistant

to aggressive chemicals. But Pro Flow Dynamics couplings feature high-resistance coating like:

PFA

PTFE

ECTFE





PFA (up to 200μ)

The best quality of a PFA (Perfluoroalkoxy) coating is its temperature resistance up to 260°C /

500°F. Anti-ad-Hesive layer makes the PFA coating suitable to pharmaceutical and food

industry applications.

PTFE (up to 40μ)

PTFE (Poly tetrafluoroethylene) coating is just 40μ thick. The PTFE-coated coupling can resist

temperatures up to 260°C / 500°F. Similar to PFA-coated couplings, PTFE couplings also have

exceptional anti-adhesive characteristics which are appropriate for applications related to

food industry.

ECTFE (up to 1000μ)

ECTFE (Ethylene chlorotrifluoroethylene) coatings are made to withstand concentrated &

aggressive chemicals. Couplings with an ECTFE-coating provide outstanding fire properties,

electric isolating and resist to diverse temperatures up to 150°C / 302°F.




Date post:	21-Jul-2016
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Camlock Couplings Fittings Overview

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