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Industrial Valves

We offer a complete product range of Butterfly Valves, RB3A Compact Butterfly Valve, RDS1 Swing Gate Valve, Swing Gate Valves and D-AMP Automatic Valve

Butterfly Valves

Standard materials Valve body and disc
Maximum intake air temperature 125°C

AMOT, Chalwyn, and Roda Deaco offer a broad selection of butterfly air intake shutoff valves for use in diesel engine overspeed protection systems. The spring operated positive shutoff butterfly valves utilize both fail safe and energize to close actuators. The actuators are available in electric, pneumatic, hydraulic, and manual operation.

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RB3A Compact Butterfly Valve

Roda Deaco Model RB3A is a compact butterfly design air intake shutoff valve available with electric or mechanical actuation. Actuation of the Model RB3A closes the valves sealing element which shuts off intake air flow into the engine. The RB3A can be used in fully automatic or manual shutdown systems. We offer custom configurations to fit your specific applications. Our valves are tested to strict OEM standards for shock, corrosion, vibration and life cycle.

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RDS1 Swing Gate Valve

The Roda Deaco RDS1 Swing Gate Valve is a compact air intake shutoff valve that provides emergency overspeed shutdown of a diesel engine. The RDS1 Swing Gate Valve can be triggered to close, which starves the engine of air and shuts down the engine.

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Swing Gate Valves

Max intake air temperature -40°C to 100°C
Valve size 5 in valve size
Net weight 15kg

The Roda Deaco Swing Gate Valve is a positive spring operated air intake cut-off device that provides emergency overspeed protection for a diesel engine. The swing gate compact size requires minimal clearance in the engine compartment. The valve is available in several diameters and has a wide array of intake line connections available to meet the customer's engine requirements.

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D-AMP Automatic Valve

TPZ w/ Air Filter (Bendix type) 7.5 - 93
TPZ (Bendix type) 7.5 - 179
D-AP and D-AMP (Spindle type) 80 - 600

The Chalwyn TPZ Bendix type automatic valve and D-AP Spindle type automatic valves are designed to automatically stop an engine by closing down the air intake in the event of an engine runaway or overspeed condition. These valves include a pressure override mechanism that will close the valve when supplied with an air pressure signal from the engine control system. A remote cable actuated manual override to close the valve can be added to the TPZ valves and are included with the D-AMP valves. In addition an optional integral air filter can be mounted directly on the smaller sized TPZ valves to reduce the size and complexity of installing the valve into engine packages where space is limited. This eliminates the requirement to find a location to support and mount a separate air filter and the associated air intake line upstream of the valve.Available models:

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D-AMZ Automatic Valve

Optional Integral Air Filter 7.5 - 93
TMZ (Bendix type) 7.5 - 179
D-AMZ (Spindle type) 80 - 600

The Chalwyn TMZ Bendix type automatic valve and D-AMZ Spindle valves utilize two automatic closure methods. They are designed to automatically stop an engine by closing down the air intake in the event of an engine runaway or overspeed condition. These valves incorporate a failsafe loss of pressure override mechanism that will also close the valve automatically with the loss of oil or pneumatic pressure signal from the engine control system. A manual start overrideemergency stop lever is also included. In addition, a flame trap housing with an optional integral air filter can be mounted directly on the smaller sized TMZ valves to reduce the size and complexity of installing the valve into engine packages where space is limited. The flame trap housings are available in two depths: (21mm) & 1 (40mm) The TMZ or D-AMZ valves are selected by combination of the air intake line bore size and the engine power at its rated speed. The size range for the valves is indicated below.

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4262C Butterfly Valve

Max. intake air temp: 125°C
Valve bore size: 4" and 6" Valve sizes
Electric solenoid operators 12 and 24 VDC type

Model 4262C air intake shutoff valve stops the engine in an emergency or in the event of engine runaway (overspeed). It can be actuated pneumatically, hydraulically or electrically and a manual option is available.

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RDS2 Swing Gate Valve

If flammable gas or vapor is present in the atmosphere surrounding a diesel engine, it can be ingested into the engine and become an ungoverned fuel supply. This ungoverned fuel can result in runaway engine overspeed potentially leading to dangerous mechanical failure or explosion. The Roda Deaco by AMOT Model RDS2 Swing Gate Valve is a positive spring actuated air intake shutoff valve that provides emergency overspeed shutdown of a diesel engine. The RDS2 Swing Gate Valve can be triggered to close which starves the engine of air and shuts down the engine.

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D-AM Automatic Valve

Mini (Mini-Bendix type) 1.5 - 27
Standard (Bendix type) 7.5 - 179
Large (Spindle type) 80 - 600

The Chalwyn D and D-AM automatic valves are self-contained with flow actuated overspeed shutdown. They require no external electrical or mechanical input devices. The closing force is provided by the intake air flow passing through the valve. The valve closes automatically when the engine speed exceeds a pre-set point. The valve automatically resets open soon after the engine has stopped, so the engine is ready for re-starting. The Model D is the basic version of the automatic valve. The D-AM is the automatic valve with a manually operated pull T handle cable stop. The cable is available in lengths of 1.0, 1.5, 2.0, and 3.0 meters. The valves are available in 3 size ranges and are selected by combination of the engine power at its rated speed and the air intake line bore size.

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RDS3 Swing Gate Valve

If flammable gas or vapor is present in the atmosphere surrounding a diesel engine, it can be ingested into the engine and become an ungoverned fuel supply. This ungoverned fuel can result in runaway engine overspeed, potentially leading to dangerous mechanical failure or an explosion. The Roda Deaco RDS3 Swing Gate Valve is a compact air intake shutoff valve that provides emergency overspeed shutdown of a diesel engine. The RDS3 Swing Gate Valve can be triggered to close, which starves the engine of air and shuts down the engine.

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Automatic Self-Contained Valves

The Chalwyn automatic self-contained overspeed shutdown valves are flow actuated, requiring no external electrical or mechanical input devices. The closing force is provided by the intake air flow passing through the valve. The valve closes automatically when the engine speed exceeds a pre-set point. The valve automatically resets open soon after the engine has stopped, so the engine is ready for re-starting.

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4261M Butterfly Valve

Max. intake air temp: 93°C 200°F
Valve bore size ranges: 61mm - 191 mm
Electric solenoid operators: 12VDC & 24VDC

Diesel runaway is a potential problem that can cause damage to equipment. A diesel engine can runaway and self destruct on hydrocarbon vapors, even if the engines primary source of fuel is taken away. An air intake shutoff valve is recommended for diesel engines which have a possibility of encountering hydrocarbon vapors.

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