We offer several installation options - click here to learn more

RB Butterfly Valve

Compact Butterfly Valves

Positive air intake shutoff valve designed for tight clearances

RS Swing Gate Valve

Swing Gate Valves

Reliable engine shutdown for a variety of applications


ThrottleStop Engine Shutdown

Uses OEM throttle valve to prevent engine overspeed

7000 Series Swing Gate

Heavy Duty Swing Gate Valves

Endures the harshest worksite conditions

Chalwyn D Valve

Flow Actuated Valves

Self-contained overspeed protection

Designed to Order

Custom-Fit Solutions

Don't see what you need? Contact us for a custom-designed solution.

Diesel Engine Emergency Shutdown Systems

Roda Deaco is the primary supplier of positive air intake shutoff valves and accessories—also known as ASOV (air shutoff valves) or ESD (emergency shutdown valves)—designed to prevent diesel engine runaway. We offer a diverse selection of valve types, sizes, and actuation methods engineered to protect engines against dangerous mechanical failure and workers from injuries that can result from diesel engine runaway. Learn more about Roda Deaco and our commitment to innovation and quality.

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