The TLR 300 controls
pressurization of the blast machine.
When the control handle
lever is pressed, a rubber button seals the opening, forcing
air from the outbound side of twinline to return through
the inbound side. Pressure in the return line opens the inlet
valve and closes the outlet valve. This action pressurizes
the blast machine and begins the blasting process. Releasing
the handle exhausts the control air, closing the inlet
valve, and opening the outlet valve to depressurize the blast
machine and stop the blasting.
If the constructive arrangement
allows no combined inlet/ outlet valve (e.g. RMS 2000) inlet
(TLR 300) and outlet (TLR outlet) valves can be used separately.
The inlet valve can be
equipped optionally with an eletrico-pneumatic switch box.
Electric remote controls (electro-pneumatic) are recommended
when the nozzle and remote control handle are farther than 100
feet from the blast machine. Pressure loss through pneumatic
systems over longer distances delays actuation time, and
could prevent fast, safe depressurization time should an
accident or an emergency occur.