Roda Installation - Air Intake Shutoff

Positive air shut off valves and accessories

Roda Deaco positive air shut off valves and accessories prevent your diesel engine from becoming an ingition source in the event of an overspeeed. We offer the widest range of sizes and actuation methods because a one-size-fits-all approach doesn't work. From compact to heavy duty, manual or automatic, and everything in between, we can guarantee the best product for your unique application.

Our complete product line includes Roda Deaco, Chalwyn, Rigsaver and AMOT brands.

Butterfly Air Shut Off Valves

Ideal for applications with tight clearances. Examples may include, but are not limited to light towers, generators, skid steers, trucks and small dozers.


Swing Gate Air Shut Off Valves

The Swing Gate Positive Air Shut Off Valve uses a "guillotine" method for emergency engine shutdown.  It is offered in a variety of sizes and actuation methods. 

ThrottleStop Overspeed Protection

This revolutionary product is a plug-n-play positive air shut off system that uses the factory-installed throttle valve to immediately shut down the engine. ThrottleStop is the preferred solution for light duty automotive trucks and heavy duty trucks.

Heavy Duty Swing Gate Valves

The Heavy Duty Swing Gate line is ideal in today's most demanding high horsepower applications. This series includes qualified solutions for Cummins® QSK50 and MTU® 4000 engines.  (Cummins is a registered trademark of Cummins Inc.  MTU is a registered trademark of MTU Friedrichshafen.)

Flow Actuated Valves

The Chalwyn brand D-AM automatic positive air shut off valves are self-contained with flow actuated overspeed shutdown. They require no external electrical or mechanical input devices.

Speed Switches

The Roda Deaco Revguard Speed Switches detect the hazard of an overspeed condition. When engine RPMs exceed the Revguard’s program setpoint, the output is energized, providing the signal to actuate the air intake shutoff valve(s) to shut off your engine.


We have a wide range of Activation, Installation and Wiring Harness Kits to ease the installation of positive air shut off valves. The kits are designed to meet specific engine models and application requirements.

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