CM Series

Air Shutoff Valves

  • Engine Power: 4 - 603 HP
  • Mass: 1.0 - 18.7 LB
  • Height: 2.36 - 6.2 in
  • Combined Manual and Automatic Engine Overspeed Shut Down Valves
  • A range of easily installed diesel engine air intake valves that automatically close on engine overspeed, and also incorporate a manual shut down feature for additional safety.

The Fluid Power Energy (FPE) CM Series combined manual and automatic overspeed air intake shut down valves are designed for situations where flammable gas or vapor may enter the atmosphere in an area in which a diesel engine is operating.

Should such flammable material be drawn into the engine intake, this may result in uncontrolled engine overspeed, and a situation in which shut down of the diesel fuel supply may fail to stop the engine.

Under these circumstances, a rapid shut down of the engine is required by immediate closure of the engine air intake thereby reducing the potential for significant damage and possible ignition of the flammable material in the surrounding atmosphere.

The FPE CM Series automatic engine air intake shut down valves are suitable for installation in the intakes of either naturally aspirated or turbocharged engines.

Once installed and set, the repeatability of the actual engine automatic shut down speed has a greater scatter in the case of turbocharged engines than for naturally aspirated types. However, unless there is an
individual requirement for an exact shut down speed, adequate protection from excessive engine overspeed is achieved.

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Description

The actuation force to close the valve is derived from the engine intake air flow passing through the valve. As the air flow increases, this actuation force also increases. The actuation force is resisted by an internal valve spring, the pre-load of which is adjusted via the “Trip Adjuster Screw.”

Once the actuation force exceeds the resisting force of the valve spring, the valve rapidly moves to the closed position. Once closed, the CM Series valve remains shut until the engine has entirely stopped. The valve then resets to the open position after a slight delay.

The FPE CM Series of automatic overspeed intake shut down valve kits include a manual actuator connected to the valve via a mechanical cable to enable emergency vavle closure.

Dimensions

CM SERIES - IMPERIAL DIMENSIONS

IMPERIAL TABLE ENGINE POWER RANGE (HP) DIMENSIONS (INCHES)
MODEL MIN MAX A B L (MAX) MASS (LB) STOCK HOSE ADAPTERS D (OTHER SIZES AVAILABLE ON REQUEST)
CM018 4 24 2.60 2.36 0.79 1.0 1.4 1.5 1.8 1.8
CM027 5 36 3.19 2.36 0.79 0.8 1.4 1.5 1.6 1.8 1.9 2.0
CM045 10 60 4.04 2.99 0.79 1.3 1.8 1.9 2.0 2.3 2.4 2.4 2.5 2.8
CM078 40 105 4.78 3.17 0.79 1.5 2.0 2.4 2.5 2.8 3.0
CM090 54 121* 5.12 3.46 0.98 2.0 2.8 3.0 3.3 3.5
CM110 67 148* 5.67 3.78 0.98 2.6 2.8 3.0 3.3 3.5
CM140 107 188* 6.22 4.06 0.98 3.3 3.5 3.9 4.0
CM185 134 248* 6.89 4.29 0.98 4.2 3.5 4.0 4.5
CM235 174 315* 8.15 4.92 0.98 6.8 6.0 4.8 5.0 5.5
CM290 201 389* 9.13 5.31 1.18 8.4 6.0
CM450 362 603* 11.93 8.3-6.2 1.2-1.6 18.7 6 TO 9 - TO ORDER

CM SERIES - METRIC DIMENSIONS

METRIC TABLE ENGINE POWER RANGE (HP) DIMENSIONS (INCHES)
MODEL MIN MAX A B L (MAX) MASS (LB) STOCK HOSE ADAPTERS D (OTHER SIZES AVAILABLE ON REQUEST)
CM018 3 18 66 65 20 0.26 25 35 38 45
CM027 4 27 81 65 20 0.35 35 38 41 45 48 51
CM045 7.5 45 102.5 80.5 20 0.57 45 48 51 58 60 62 64 70
CM078 30 78 121.5 83.5 20 0.7 51 60 64 70 77
CM090 40 90* 130 90 20 0.9 70 77 83 89
CM110 50 110* 144 101 25 1.2 70 77 83 89
CM140 80 140* 158 109.5 25 1.5 89 98 102
CM185 100 185* 175 114.5 25 1.9 89 102 114
CM235 103 235* 207 131 25 3.1 102 114 127 140
CM290 150 290* 232 141.5 30 3.8 153 127
CM450 270 450* 303 210-158 30-40 8.5 6 TO 9 - TO ORDER

Part Number Look Up

CM Series Air Shutoff Valve - Part Number Lookup

FPE Number Range in mm AMOT/Chalwyn Number
CM018 - 025 to 045 D30 - AM
CMF020 - * 035 to 044 D35BF - AM
CMF027 - 035 to 051 D41 - AM
CM045 - 045 to 070 D45 - AM/D51 - AM**
CM078 - 051 to 077 D57 = AM/D64 - AM**
CM090 - 070 to 089 D70 - AM
CM110 - 070 to 089 D80 - AM
CM140 - 089 to 102 D92 - AM
CM185 - 089 to 114 D102 - AM
CM235 - 102 to 140 D121 - AM
CM290 - 127 to 153 D136 - AM
CM450 - 152 to 229 D200 - AM
*This ASV includes a filter **FPE part number listed are used to replace both Amot/Chalwyn part numbers shown

General & Pneumatic Specifications

Specifications

Valve Selection

The following data is required for FPE to select the most suitable valve for your application:

• Engine type and model
• Engine rating and/or application details
• The internal bore of the intake system hose at the position the valve is to be fitted
• The cable length for the manual shut down

For FPE Coding:

Use metric value for adapter code, add zero to make 3 digit code (e.g. 25 = 025)
Combine inlet and outlet adapter, if the same
Special features by arrangement with FPE

CM SERIES - FPE CODING

CM SERIES - FPE CODING
CM CM Series
XXX Max. Engine Power (KW)
-
XXX Inlet Adapter Size (MM)
-
OXXX Outlet Adapter Size (MM) (only use if different from inlet)
-
T or L Manual Close Handle Style (T= T-Handle; L= Lever)
-
XX Manual Shut Down Cable Length (Meters)
-
SXXX Special Features Code

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