Air intake operated
fuel shut down valve
 


The european standard EN 1834-1:2000 covering diesel engine operation in 1 or 2 hazardous areas where flammable gas or vapour may exist, requires that both the engine fuel and intake air supply are automatically shut down if engine overspeed occurs.

  • Used in conjunction with chalwyn air intake shut down valves
  • Instant closure of fuel supply when intake valve shuts
  • Does not require reset following a normal engine shut down
  • Kits of parts available for the connection to the air intake valve
  • Support bracket included




Air pressure operated
intake shut down valves with automatic reset
 

  • Simple direct air pressure operation
  • Option either open or close on the application of air pressure
  • Automatic reset on loss of air pressure
  • Valve status position visual indicator



►  Pvs models :

  • Combination of body sizes and hose adaptors to suit air intake
  • Diameters from 38mm(1 1/2inches) to 203mm(8 inches)



►  PVX Models :

  • 71mm, 90mm and 140mm connection diameters offered
  • Ultra slim design with integral hose ends



►  All HVX, MPX and PVX Valves :

  • Are of slim, lightweight, corrosion resistant construction
  • Can be flange or hose mounted
  • May be combined with Chalwyn FSX-200 fuel shut down valve to give simultaneous shut down of intake air and diesel fuel.




Automatic engine air
intake shut down valves with air pressure control
 

Automatic engine air intake shut down valves with air pressure signal for dependable engine shut down. With air flow sensing design and lightweight construction they are easy to install and low maintenance.


  • Air flow sensing valves combining automatic overspeed shut down with air pressure operated shut down
  • No speed signal or power input needed
  • Automatic reset after engine shuts down and air pressure signal removed
  • TPZ range suitable foe engine ratings from 7.5kw(10hp) to 149kw(200hp) and intake hose bores from 51mm(2 inches) to 108mm(4 1/4inches).
  • Combines with chalwyn FSX-200 fuel shut down valve to give simultaneous shut down of intake air and diesel fuel supply
  • D-AP/D-AMP valves can be selected to suit engine rating from 80kw(107hp) up to 600kw(805hp) and engine air hose bores from 76mm (3inches) to 299mm(9 inches)
  • Suitable foe zone 1 or 2 intallations including air operated EDS systems.





Automatic engine air
intake shut down valves with oil pressure control
 


Air intake valves with manual shut down combined with automatic shut down on overspeed or loss of oil(or air) pressure signal with air flow sensing design and lightweight construction they are easy to intall and low maintenance.


  • Dependable mechanical valve combining automatic overspeed shut down with shut down on loss of oil(or air) pressure and manual shut down by remote lever.
  • Can be combined with chalwyn FSX-200 fuel shut down valve to give simultaneous shut down of fuel and air
  • Can be combined with AMOT mechanical temperature sensors to also give shut down on high temperature
  • Models up to 93kw(125hp)are available with either outlet hose connection or flanged base with flametrap housing.
  • Remote lever allows engine start before oil pressure is sufficient to hold valve open.
  • TMZ range suitable for engine rating between 7.5kw(10hp)and 149kw(200hp) and intake pipe bores between 40mm(1 9/16inches)to 108mm(4 1/4inches)
  • Suitable for zones 1 and 2
  • Zinc body versions available for mining use





Automatic overspeed air
intake shut down valves
 


Chalwynd valves are the international industry standard for oil companies and operators for dependable engine shut down on overspeed. With patented air flow sensing design and lightweight construction they are easy to install and low maintenance.

  • Automatic reset after engine stops.
  • Tamper resistant speed adjuster
  • Suitable for zone 1 or 2 installations
  • No seed signal or power input needed
  • ‘mini’ range covers engine up to 27kw(36hp) and intake pipe diameters from 25mm(1 inches) to 58mm(2 1/4inches)
  • ‘Bendix’ range suits engine from 7.5kw(10hp) to 149kw(200hp) and intake hose bores from 40mm (1 9/16inches) to 108mm(4 1/4inches)
  • Deutz special range valves are suitable for direct mounting to 1011 and 2011 naturally aspirated engines up to 53kw(72hp) and with 70mm(2 3/4inches) standard inlet hose.
  • Combines with chalwyn FSX-200 fuel shut down valve to give simultaneous shut down of intake air and diesel fuel supply(Bendix only
  • ‘Spindle’ range valves are suitable for engine with rating from 80kw(107hp) to 392kw(525hp) and intake hose bores from 76mm(3 inches) to 153mm(6 inches)
  • D200 range extends up to a maximum engine rating of 600kw(805hp) and intake hose bores between 152mm(6 inches) and 229mm(9 inches).
  • Zinc body versions available for underground mining use




Butterfly type engine air
intake shut down valves
 


Manually operated air intake shut down valves are suitable for attended applications where automatic overspeed protection has not been specified. Their lightweight construction makes them easy to install with low maintenance.



  • Combination of body sizes and hose adaptors to suit air intake diameter from 38mm(1 1/2inches) to 203mm (8 inches)
  • Simple operation – rapid engine shut down
  • Push or pull shut down button on basic MVX valves
  • Remote stop control by either push or pull options
  • Can be flange or hose mounted
  • Corrosion resistant, proven in offshore service
  • Choice of cable lengths available
  • Version with twin pull to stop cables available
  • Choice or T handle or lever on pull to stop versions.






Electrical switch type sensors

In order to provide complete shut down control system foe engines operating in hazardous area, Chalwyn and AMOT offer a range of electrical sensors.


  • Suitable for incorporation into chalwyn series 110, 111, 210 and 300 electro mechanical systems
  • Twin 4m flying leads
  • Electrically isolated cases
  • Corrosion resistant construction
  • Gold or fine silver contacts
  • Standard factory setting for coolant temperature sensor 100 c (212 F)
  • Standard factory settings for exhaust temperature sensor 135c(275F), 150C(302F) and 200C(392F)
  • Version with twin pull to stop cables available
  • Standard factory setting for oil pressure sensor 0.7 bar (10psi) falling




Electrically operated air
intake shut down valves – energized to open
 

Chalwyn svx butterfly valves are available with failsafe solenoid operation where the technical specification or EU ATEX directive requires a control system that is powered to run whist holding the shut down valve in open position.



►  SVX Safe area energised to open models :

  • Externally switched 3 wire solenoids
  • Automatic closure on loss of power – failsafe
  • Internal micro switch option foe valve status monitoring
  • Combination of body sizes and hose adaptors to suit air intake diameter from 38mm(1 ½ inches) to 203mm(8 inches)
  • Optional timer module SD-085 available



►  SVX hazardous area energised to open models :

  • ATEX approved for zone 1, 11B, T4 applications
  • Externally switched 3 wire SSX solenoid with 3 core cable
  • Automatic closure on loss of power – failsafe
  • Combination of body sizes and hose adaptors to suits air intake diameters from 38mm(1 1/2inches) to 203mm(8 inches)
  • Optional time module available



►  SVX energised to latch open models :

  • ATEX approved for zone 1, 11B, T4 applications
  • Two wire holding SSX solenoid with 2 core cable
  • Safe are versions also available
  • Manually held by remote lever for engine starting
  • Sprung closed on loss of power
  • Manually emergency stop
  • Combination of body sizes and hose adaptors to suit air intake diameters from 38mm(1 ½ inches) to 203mm(8 inches).




Electrically operated valves
– energized to close
 

Modern vehicles and industrial engines require compact low restriction air intake shutdown valves. Chalwyn offers an extensive range of butterfly valves to incorporate with automatic overspeed control systems.



►  SVX Safe area energised to close models :

  • Compact design
  • Suitable for vehicles and smaller engines
  • 2 body sizes with choice of end diameters
  • Range covers from 44mm(1 1/3inches) to 77mm(3 inches)
  • Manual reset control on valve
  • Suitable for installation post – intercooler
  • 12 volt and 24 volt versions
  • Controlled by chalwyn required 2




►  SVR safe area energised to close models :

  • Combination of body sizes and hose adaptors to suit air intake diameters from 38mm(1 ½ inches)to 23mm(8 inches)
  • 12 volt or 24 volt versions
  • Two wire solenoid connection
  • Simple manual reset to latch open
  • Manual cable option for secondary operation method or testing
  • Internal micro switch option for valve status monitoring
  • Versions available with hazardous area SSX solenoid
  • Slim lightweight corrosion resistant construction
  • Can be flange or hose mounted
  • May be combined with chalwyn FSX-200 fuel shut down valve to give simultaneous shut down of intake air and diesel fuel supply using FKX-300 fitting kit.




Electronic speed switch
 

Installations where butterfly valves are selected will require reliable sensing of the engine speed so that on detection of overspeed runway the system will automatically signal the valve to close and safety stop the engine


►  Revguard 2 :
  • Dependable protection from overspeed conditions on engine and other rotating equipment
  • Monitors RPM exceed desired set point
  • Adjustable with 4 possible lower RPM by magnetic pick uRPM by magnetic pick up
  • Can also monitor alternator pulse signal output
  • Trips when RPM exceeds desired set point
  • Adjustable with 4 possible lower RPM test options.
  • 12 or 24 volt power source required
  • Installation kits available to connect with butterfly valves
  • Kit includes toggle switch, switch cover, replay, circuit breaker and LED status indicator light




►  Magnetic pick ups :

Chalwyn electronic speed switches are designed to sense the engine speed through either the alternator pulsation signal or a signal from a magnetic pick up that is positioned closed to the flywheel ring gear.



►  4031 magnetic pick up :

  • Permanent magnet RPM sensor
  • Fits in standard ¾ inch UNF hole in flywheel housing
  • Metric sizes also available
  • Sends pulse signal to CSX-300 or Revguard 2
  • 4031 is for general purpose use



►  AMOT 8017B magnetic pick up :

  • AMOT 8017B is ATEX and CSA approved for hazardous areas
  • 24 volt air pressure solenoid powered to open
  • Suitable for trucks with air pressure braking systems
  • Allows air to flow chalwyn valve when powered
  • Suits MPX, PVX, PVA valvese
  • Resets automatically on lose of signal from Revguard2
  • Simple plumbing using available fitting kit SKA-100




Exhaust spark arrestors
 

An exhaust spark arrestor is key safety requirement for both hazardous area and lower risk diesel engine application such as refineries or gas plants where a stay spark may cause ignition of combustible hydrocarbons in the air.
Virtually all legislation for the use of diesel engines in hazardous area includes a mandatory requirement to fit a certified exhaust spark arrestor.



  • Ideal for offshore and corrosive environments
  • ATEX compliant for surface and mining applications
  • Certified for use in zone 1 and 2 areas
  • 100% 316 grade stainless steel construction to EN1834 and ANSI standards
  • Clamp-on pipe ends standard
  • Threaded or flanged connection available to special order
  • Range sizes covering engine rating from 7.5kw(10hp)to 820kw(1100hp)
  • Type SSE are non-silencing for end of line fitting on pipe sizes up to 102mm(4 inches) using single clamp induced
  • Type SSL have industrial standard silencing so can replace vehicle silencers or for supported installation with pipe sizes up to 254mm(10 inches).
  • Pipe adaptor tubes available




Flameproof alternators
 


Standard automotive alternators are a continuous potential source of ignition when fitted to an engine operating in a hazardous area where combustible concentrations of gas, vapour or dust may exist. Always replace with a suitable flameproof type when operating in defined hazardous zones.

  • Exd 11B T4 ATEX compliant variants applicable to groupie hazardous gas, vapour and group III dust applications
  • Certified to IECEx standards(not ASX-400/1)*
  • Certified to NEC 505 zone 2(not ASX-400/1)*
  • CERTIFIED TO nec 500(not ASX-400/1) and NEC 506(ASX-405/6 only)*
  • Some models certified to Canadian CSA standards*
  • Standard automotive internal regulation
  • Wide choice of drive pulley options
  • Speed signal output
  • Optional glad positions for ease of installation
  • Output – group II types:
    • ASX-200: 12volts/50 amperes
    • ASX-300: 24volts/25 amperes
    • ASX-310: 24volts/25 amperes
    • ASX-400: 24volts/50 amperes
    • ASX-405: 24volts/50 amperes
*contact chalwyn for details






Manual reset air
intake shut down valve with air pressure or manual shut down
 

For large trucks, trains and engines where air pressure is available, chalwyn offer a wide range of butterfly valves which includes a choice of reset methods.

  • Simple manual latch to open – air pressure release valve to close and stop engine
  • Manual shut down by valve mounted stop button or by cable from remote shut down control
  • Push or pull remote shut down options with choice of cable lengths
  • Suitable for drilling rig ESD(emergency shut down) air system installations
  • Build option available without manual shut down
  • Combination of body sizes and hose adaptors to suit air intake diameter from 38mm(1 ½ inches) to 203mm(8 inches)




Manually opened air
intake valves with manual closure and automatic closure on loss of oil(or air) pressure signal
 


  • Manually held open until oil(or air) pressure latches
  • Direct acting remote manual emergency stop
  • May be combined with AMOT mechanical sensors to give automatic shut down on high temperatures
  • Combination of body sizes and hose adaptors to suit air intake diameters from 38mm(1 1/2inches) to 152mm(6 inches)




Mechanical overspeed valve
 


  • Dependable mechanical protection from overspeed for engines and rotating equipment
  • Available setting from 800-4200 RPM
  • Trip point is field adjustable
  • Operates in hydraulic or pneumatic systems
  • Can be mounted in-line with existing tachometer cable
  • Can be mounted in any position
  • Several mounting extensions and adpters including flexible shafts and 90* cable drives available
  • Anodized aluminium body construction




Mechanical control system accessories
 

  • AMOT mechanical control system accessories are available for use in pneumatic or hydraulic engine control system. Please contact the factory offices for more details