MPX Pressure to Close Valve
The Chalwyn MPX Pressure to Close Butterfly Valve with Manual Close is designed to mechanically latch in the open position for the diesel engine to run. In the event of an engine overspeed condition, direct pressure from the engine pneumatic or hydraulic control system is applied to release the latching mechanism. The positive spring action in the MPX valve will close the valve to shut down the engine.
The valve is designed to be opened manually using a reset lever on the top of the valve. The valve should be positioned where the reset is easily and safely accessible.
The basic MPX Valve is available with the options for a microswitch position indication. The microswitch position indication is not available on models with manual close.
Manual Close Options
The MPX Valve has 3 options to allow an operator to manually close the valve: local stop button, remote pushbutton manual cable, and remote “T” pull handle manual cable.
When using the local stop button option the valve, as mentioned in the prior paragraph, should be located where both the reset lever and stop button will be easily and safely accessible. For types with a remote manual stop, position the valve and select the cable length to give a reasonably straight cable run between the MPX valve and the proposed stop button or pull “T” handle position. Cables are available in lengths of 1.0, 1.5, 2.0 and 3.0 meters.
Diesel Engine Shutdown System Accessories
The MPX Valves are used as part of automatic or manual systems. Some of the major components for the systems are shown below. Refer to the System Selection Guide for more information on systems and accessories.
Valve Installation Accessories
There are accessories and kits available to help simplify installation of the MPX Valves. Hose adaptors (shown installed on the valve) are available in a wide range of sizes to match the requirement for engine air intake lines. Installation kits are also available for a wide variety of hose sizes.
● HAX Butterfly Valve
● Hose Adaptors
RGR RevGuard Speed Switch
8210 SpeedTrap Speed Switch
CSX-300 Control Unit
● 4031 Magnetic Pickup
● 8017 Hazardous Area Magnetic Pickup
● 11408X Magnetic Pickup
Actuation kits contain hardware required to properly install and integrate the specified shutdown system into the diesel engine application. The kits, specific for each type of system and application, can include items such as:
● Voltage control module
● Circuit breaker
● Toggle switch