Categories

Site Information

 Loading... Please wait...
Free Shipping on orders $75+ (Click for details)
Navigation Tools

Recent Posts

MONTHLY NEWSLETTER

CATEGORIES

Electric vs. Pneumatic Remote Controls for Sandblasting

Posted by John Gula on

A remote control system is an OSHA-required safety device. The control handle, often referred to as a dead man switch, is the trigger for the RC system. When the operator releases the RC handle, the machine deactivates, stopping air and abrasive flow through the nozzle. The remote control system “fails to safe,” which means that with any interruption in the air circuit, such as releasing the dead man, the remote controls deactivate the blast machine.

Pneumatic Remote Controls

The Clemco TLR Remote Controls operate pneumatically. If the operator is not squeezing the dead man handle, one stream of air travels down the outbound side of the twinline and escapes through an opening located under the lever. The normally closed inlet valve remains closed, and the normally open outlet valve remains open.

When the dead man handle lever is pressed, the opening is sealed, and air in the outbound line returns through the inbound line to open the inlet valve and close the outlet valve. This action pressurizes the blast machine and begins the blasting process. Releasing the handle puts the machine in exhaust mode, which closes the inlet valve, and opens the outlet valve to depressurize the blast machine and stop the blasting.

Pneumatic remote controls work best in blasting operations with blast hose lengths less than 100 ft.

Electric Remote Controls

Electric remote controls are required when the nozzle is more than 100 feet from the blast machine. Distances 100 feet or greater allow for too much of a delay when using a pneumatically-operated remote system due to the amount of time it takes for the air signal to reach the inlet valve and outlet valves. Instead, an electric cord is used in place of the twinline hose to send the signal.

Electric remote controls send an electric signal back to a control panel at the blast pot. The control panel then sends a signal of air to the inlet and outlet valves telling them to open or close. The fact that the control panel is mounted on the blast pot takes away any delay in sending the signal. Electric remote controls are also used in cold environments since pneumatic systems may freeze due to the condensation that builds up within the lines. To prevent damp air from freezing, an antifreeze injector is installed on all electric control panels.

Many manufacturers recommend that you switch to electric remote controls when your blast hose distance reaches 100 feet or greater. OSHA requires you switch to electric remotes when you reach 200 feet. 

View Comments


Using Low-Pressure Respirator Requires Special Precautions

More and more blasting contractors are making the switch to low-pressure respirators. A high-pressure respirator requires an air source of 6 to 15 cfm at 65 to 100 psi. Some contractors connect their high-pressure respirator to the same compressor that supplies the blast air. A low-pressure respirator requires just 8 to 15 psi, but still [...]

Read More »


What's In The Air?

Low Pressure or High Pressure, Choose Respirator Based on Quality of Air Supply       Health and safety regulators are taking a closer look at how blast operators use their high-pressure respirators, long the main-stay of the blasting industry the world over. Their primary concern – what is in the air supplied to the helmet?High-pressure respirators [...]

Read More »


Control Static Build Up for Safety, Operator Comfort, and Efficient Media Separation

How many of us really read the owner's manual that accompanies our new purchase? Every Clemco owner's manual contains important information about the safe and efficient use of our equipment. Doing your homework and selecting the right equipment and media for your blast application are only the first steps to achieving an efficient operation.Blast equipment, [...]

Read More »


The Effects of Moisture on Sandblasting

As the days get longer and the weather gets warmer, summer is within our grasps. While you might enjoy the sunny days, your blast machine might not. Warmer weather means increased humidity in the air. This causes the warm air produced from your air compressor to condense allowing moisture to enter your blast pot. As a result, the abrasive [...]

Read More »


Types of Media Valves for Sandblasting

Abrasive media valves are used to regulate the flow of abrasive from the blast pot on a sandblasting machine. Just like choosing the right blast nozzle and blast hose, you want to make sure you choose the right type of media valve for your machine and abrasive of choice.When it comes to metering valves, there are two types: [...]

Read More »


What You Need to Know About Shot Peening

Did you know that sandblasting can be used for shot peening? If you’re unsure what shot peening even is, don’t worry as we will cover everything you need to know about this complex process. Plus, learn about the benefits of shot peening and the equipment needed.What is Shot Peening?Shot peening is a cold work process or plastic deformation of [...]

Read More »


How to Choose the Right Sandblasting Nozzle: Silicon Carbide vs. Tungsten Carbide

Nozzles are one of the most important pieces of sandblasting equipment, and an appropriate or inappropriate blast nozzle will affect your production. The taper and length of the blast nozzle’s inlet and outlet affects both the pattern and velocity of the abrasive blast media exiting the nozzle.When choosing the correct size nozzle, you need to consider a few things outside [...]

Read More »


Recent Posts

CATEGORIES