by AMOT World class diesel engine safety solutions Product Selection Guide

World class diesel engine safety solutions Diesel engines are a potential source of ignition when used in areas where combustible gas, vapours or dusts may exist. The resulting conflagration can lead to catastrophic consequences for personnel, production and the environment. This problem has been recognised for many years. It led to the introduction of the original Chalwyn air intake shut down valve, a device designed to automatically and safely stop a diesel engine should it start to overspeed due to a combustible mixture being drawn into the engine intake. Following the success of this product,...

Helping to make hazardous areas safer Contents Page Air intake shut down valves 4 Oil/air pressure - auto or manual reset 6 Automatic overspeed and air pressure 8 Automatic overspeed and oil/air pressure 9 Typical full mechanical shut down control system 9 Fuel shut down valves 12 Typical simple mechanical shut down system 12 Mechanical overspeed valve 13 Electro-mechanical shut down controls 16 Examples of electro-mechanical shut down systems 17 Exhaust spark arrestors 18

Chalwyn engine air intake shut down valves If flammable gas or vapour is drawn into the air intake of a diesel engine it acts as an additional ungoverned fuel supply. This may result in uncontrolled engine overspeed followed by dangerous mechanical failure or flash back through the intake and the ignition of the surrounding gas or vapour cloud. Once a flammable mixture is being drawn into the engine intake it may not be possible to stop the engine by closing down the fuel supply. For this reason an air intake valve must be fitted to ensure a guaranteed rapid and safe engine shut down. Manually...

www.dieselsafety.com Electrically operated air intake shut down valves EExe SOLENOID SVX hazardous area energised to open models • ATEX approved for zone 1, IIB, T4 applications • Externally switched solenoid • Automatic closure on loss of power • Combination of body sizes and hose adaptors to suit air intake diameters from 38mm (1 1/2 inches) to 203 mm (8 inches) see publication CE239 OPTIONAL HOSE ADAPTORS (ALL SVX VALVES) SVX hazardous area manual override, energised to latch open models • ATEX approved for zone 1, IIB, T4 applications • Two wire solenoid connection • Sprung closed on loss...

Chalwyn engine air intake shut down valves Manually opened air intake valves with manual closure and automatic closure on loss of oil (or air) pressure signal HVX valves • Manually held open until oil (or air) pressure latches • Direct acting manual emergency stop • May be combined with Chalwyn sensors to give automatic shut down on high temperatures (see page 14) • Combination of body sizes and hose adaptors to suit air intake diameters from 38mm (1 1/2 inches) to 152 mm (6 inches) see publication CE229 OIL PRESSURE CONNECTION CABLE (VARIOUS LENGTHS) START OVERRIDE / EMERGENCY STOP LEVER Air...

Automatic overspeed air intake shut down valves note: overlap between OVERSPEEn TRIP HOSE ENDS (TO CUSTOMER REQUIREMENTS) remote manual stop DF-AM models with remote manual stop OVERSPEED TRIP ■ Simple cost effective engine shut down on overspeed ■ No speed signal or power input needed ■ Light weight construction ■ Automatic reset after engine stops ■ Metal to metal seat seal ■ 'Mini' range covers engine up to 27kw (36hp) and intake pipe diameters from 25mm (1 inch) to 58mm (2 1/4 inches) ■ 'Bendix' range suits engines from 7.5kw (10hp) to 149kw* (200hp) and intake hose bores from 40mm (1 9/16...

Chalwyn engine air intake shut down valves Air intake valves with automatic shut down on engine overspeed or on application of an air pressure signal • Simple cost effective valves combining automatic overspeed shut down with air pressure operated shut down OVERSPEED TRIP ADJUSTER Basic TPZ models see publication CE237 • No speed signal or power input needed • Light weight construction AIR PRESSURE CONNECTION • Easy to install • Easy to adjust HOSE ENDS (TO CUSTOMER REQUIREMENTS) • Automatic reset after engine shuts down and air pressure signal removed • Low maintenance TPZ models with manual...

Air intake valves with manual shut down combined with automatic shut down on overspeed or loss of an oil (or air) pressure signal .SMALLER TMZ VALVES HAVE FLAMETRAP HOUSING / FLANGED Cost effective valve combining automatic overspeed shut down with shut down on loss of oil (or air) pressure and manual shut down Can be combined with Chalwyn FSX-200 fuel shut down valve to give simultaneous shut down of fuel and air (see page 12) START OVERRIDE / EMERGENCY STOP LEVER Can be combined with AMOT mechanical temperature sensors to also give shut down on high temperatures (see below) Easy to set overspeed...

AMOT 2-way temperature and pressure sensing valves Temperature sensing valve For incorporating jacket water and lubricating oil temperature sensing into a Chalwyn mechanical automatic shutdown system AMOT 2230/4430 temperature valve see publication DS_AM_2230 • Temperature range from 19°C to 129°C (65°F to 265°F) • Factory set and field adjustable (8 increments available) • Multiple installation depths available • For use in pneumatic or hydraulic control systems • The 2230 is available in brass or nickel plated brass • The 4430 is available in stainless steel High temperature sensing valve For...

AMOT 3 and 4-way valves www.dieselsafety.com 3-way and 4-way valves AMOT 4057/4457 3-way valves Designed for use in manual or automatic hydraulic or pneumatic control systems see publication DS_AM_4057 • Available with a variety of manual or pressure operators and with manual, pressure, or spring returns • Balanced force design – pressure can be applied to any port without danger of a seal blow out • The unique porting design eliminates seal ring cutting • The standard valve has a small centre dead spot that isolates the ports when moving from one position to the other • Port overlap during transition...