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Chalwyn D Valve

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.

Chalwyn D Valve

D and D-AM Automatic Valve

Actuation Options
D Series Automatic actuation and reset
D-AM Series Automatic actuation and reset with manual pull cable close cable (cable lengths: 1.0, 1.5, 2.0, 3.0 meters)
D Valve Range Engine Power Air Intake Hose Size
  kW HP mm in
Mini (Mini-Bendix type) 1.5 - 27 2 - 36 25 - 58 1 - 2¼
Standard (Bendix type) 7.5 - 179 10 - 240 40 - 108 1916 - 4¼
Large (Spindle type) 80 - 600 107 - 805 76 - 229 3 - 9

 

DF

DF / DF-AM (Integral Air / Remote Manual Stop)

 

Actuation Options
DF Series Automatic actuation with integral air filter
DF-AM Series Automatic actuation with integral air filter and manual pull cable close (lengths: 1.0, 1.5, 2.0, 3.0 meters)
D Valve Range Engine Power Air Intake Hose Size
  kW HP mm in
Mini (Mini Bendix type) 1.5 - 27  2 - 36   35 - 44   1⅜ - 1¾
Standard (Bendix type) 7.5 - 93  10 - 125 40 - 96 19/16  - 
TPZ

TPZ / D-AP / D-AMP Automatic Valve w/ Pressure Override

Automatic/Pneumatic
Override (with or without
Manual Cable Stop)

 

Engine Power

 

Air Intake Hose Size

  kW HP mm  in
TPZ w/ Air Filter (Bendix type) 7.5 - 93 10 - 125 51 - 96 2 - 3¾
TPZ (Bendix type) 7.5 - 179 10 - 240  51 - 108 2 - 4¼
D-AP and D-AMP (Spindle type) 80 - 600  107 - 805 76 - 229 3 - 9
         
Pressure to Close Override
Minimum Maximum
TPZ Air or Oil Pressure 1.5 bar 22 psi 10 bar 145 psi
D-AM / D-AMP Air Pressure 2.5 bar 36 psi  8 bar 116 psi
D200-AM / D200-AMP Air Pressure 4 bar 60 psi  8 bar  116 psi
TMZ and D-AMZ

TMZ and D-AMZ Automatic Valve w/ Loss of Pressure Override

Automatic & Loss of
Pressure Close w/
Manual Start/Stop

 

Engine Power

 

Air Intake Hose Size

  kW HP mm in
TMZ w/ Flame Trap Housing
& Optional Integral Air Filter
7.5 - 93 10 - 125 51 - 96 2 - 3¾
TMZ (Bendix type) 7.5 - 179 10 - 240 51 - 108 2 - 4¼
D-AMZ (Spindle type) 80 - 600 107 - 805 76 - 229 3 - 9
         
Loss of Pressure Close Pressure
Medium
Pressure Maximum
TMZ Air or Oil 1 bar 14.5 psi 10 bar 145 psi
D-AMZ Air or Oil 2.5 bar 36 psi 8 bar 116 psi
D200-AMZ Air or Oil 4 bar 60 psi 8 bar 116 psi