How to Safely Handle and Use Camlock Fittings?
Working with camlock hose fittings might look simple, since you connect so quickly, and the installation is done. However, how do you make sure that you are handling them in the correct way? Camlock couplings are simple to use, but handling them improperly can lead to leaks, costly downtime, and even injury. Proper handling ensures the safety of an application, ensuring no leakage and also ensuring the safety of people working on the application. So, let’s understand the best practices to operate and install these quick-connect fittings and what factors to consider while using them in any application.
Installing and Operating Cam Fittings Safely
Camlock hose connectors are popular across many industries because they're easy to use and are diverse in what they can connect together, from connecting pipes and hoses to a wide array of components, such as pumps, valves, fittings, and other equipment. While they make low-pressure connections fast, safety can be overlooked. Let's look at common errors and how to avoid them so that you operate safely.
Correct Measurement
This will determine whether the camlock pairs are the same size, which will allow them to couple. Usually, a measurement is not required; all that is needed is the size of the threaded portion of the cam or the size of the hose it will connect to. If this information is not available, then the measurement is based on the camlock's inside diameter (ID) or outside diameter (OD). More specifically, the open end or inside diameter (ID) of the female camlock determines its size, while the outside diameter (OD) determines the size of male camlock. The female half and the male half need to be the same size to couple.
Ensure Proper Coupling Every Time
Coupling a male and female camlock hose fitting together correctly is key to how it works. If you don't assemble the cam fitting correctly, it could lead to spills and leaks, or safety concerns in the case of hot or dangerous products. When it comes to assembly, the most common concern would be not to close the lever arms completely. First, make sure the gasket is in place, and then that the male cam is fitted securely into the female cam, and lastly that the lever arms are fully closed parallel to the couplings. If one of the arms is not completely closed, it could lead to disassembly in applications where a lot of movement or vibrations are present. Using the safety pins to lock the closed arms in place will ensure that the connection is locked in place and cannot be disassembled.
Routine Inspection
Although cam and groove hose fittings are designed to require little or no maintenance, It is useful to routinely check for wear and tear, especially in harsh environments or when they are used to transfer corrosive materials. The most common component that would be affected by wear and tear is the gasket. The gasket is located inside the female coupler and can be removed and replaced by hand. Other components that could need replacement are the lever arms in situations where they are closed with extreme force. (Not recommended.)
Check Pressure
Pressure ratings are crucial parameters to be adhered to, and care should be taken not to exceed these limits. Each size can function at a particular pressure rating for optimal results. In the past, the rating was stated as 150 PSI across the board; however, more recently, a PSI rating has been assigned to each size, usually around 250 PSI for sizes 2” and below, decreasing incrementally to 75 PSI for the 6” sizes. This pertains to metal camlocks, while plastic and polypropylene camlocks have a lower rating.
*Click here for a link to pressure ratings.
Check Temperature
Temperature ratings are also important parameters to follow, which will preserve the integrity of the gaskets. Since the body of the camlock can usually withstand extreme temperatures, it is the gasket that is the first to feel the effects of extreme temperatures. Metal cam and groove hose fittings are typically fitted with Buna-N Gaskets, which can withstand temperatures ranging from -22°F up to 212°F, while polypropylene hose camlocks are fitted with EPDM gaskets that can handle temperatures from -22°F up to 248°F. Viton and silicone gaskets can be purchased separately and installed to increase the temperature tolerance.
*Click here for a link to temperature ratings.
Check Compatibility
It is useful to compare the chemical compatibility of the material being transferred with the gaskets being used, as well as with the body of the coupling. If the gasket is not compatible with the material being transferred, then this could lead to corrosion over time, which could compromise the seal of the connection. Similarly, if the body of the coupling is not compatible with the product, this could lead to corrosion of the body and ultimately could lead to leaks. Using a chemical compatibility chart will facilitate this process.
* Click here for a link to a Chemical Compatibility Chart: https://www.coleparmer.com/chemical-resistance
Use the R-Pins for added safety
When you need to ensure that the cam lever arm doesn't open under any circumstances, it is strongly advised to use a safety pin or r-pin. R-pins or safety pins are essentially safety clips made from a single piece of wire used on female cam and groove couplers to lock the arms in place. Located near the top of the lever arm on a female coupler is a pin hole that is designed to receive a safety pin. Once the arms are closed and the safety pins inserted in this opening close to the top of the arm, then the lever arm won't open unless the pin is removed. Using safety pins keeps the cam arms locked in place, ensuring a continued connection.
Do Not Use Damaged Fittings
It is important not to use camlock hose fittings that are damaged, since it is difficult to isolate the effect of broken fittings. If you spot any corrosion, cracks, or bends, it is advisable to replace the fittings.
Improper Storage and Handling
If cam and groove hose fittings are handled and stored incorrectly, this could affect their performance and shelf life. For example, dropping heavy hoses from a height can lead to cracks, lowering the camlock hoses' integrity. Similarly, driving over couplings with heavy machinery could have the same effect. Additionally, keeping the hose camlocks close to heat sources or in direct sunlight can shorten their lifespan and hasten deterioration.
In Summary
To ensure your operation runs smoothly, it is crucial to install and operate your couplings safely. This involves certain safety procedures like 1) taking the correct measurements, 2) ensuring proper coupling, 3) routine inspection, 4) checking pressure ratings, 5) checking temperature ratings, 6) checking chemical compatibility, 7) using safety pins, 8) not using damaged fittings, and 9) proper storage and handling. Following these steps can help ensure the smooth operation and safety of your application.
