Model 4418F
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High Pressure Control Valve Model 4418F Overview The 4418F has been designed specifically for use as an air start valve for diesel engines or as a fuel shut-off valve for gas turbine applications. Its durable, high quality construction and compact size make it ideal for use with gas turbines in the 0 to 15 MW size range. Typical applications l Starting air/gas valve l Vented fuel gas valve l Control valve Key features and benefits l Vent port eliminates need for separate bleed valve - reduced system cost l Optional open/close indication switch simpler system set up and diagnostics l Fully adjustable for optimized system operation 4418F High Pressure Control Valve Suitable for Group 1 & 2 liquids (ensure materials are compatible) Complies with all relevant EU directives

High Pressure Control Valve - Model 4418F Operation 2-Way Version When pressure is applied to the PILOT port, the main ports (IN and OUT) are opened to allow flow through the valve. When the pilot pressure is released, a spring closes the main ports. 2-Way Vented Version When Pilot Pressure is applied to the PILOT port, IN Port is open to the OUT Port; the VENT Port is closed. When pilot pressure is removed, the IN Port closes while the VENT Port opens to the OUT Port, relieving pressure within the valve and down stream piping. When used on a fuel gas system, the fuel intake manifold is...

High Pressure Control Valve - Model 4418F Specification Body materials Stainless steel Standard internals Stainless steel Optional internals Aluminum Seals Viton Operating temperature Valve pressure rating Pilot pressure (standard) 30 PSI (2.1 Kg/cm ) to 150 PSI (10.5 Kg/cm2) Dependent on process working pressure 2 Flow coefficient Close Time* * Contact AMOT for advice on suitable solenoid valves and pilot pressures. Weight Weight in Kg (lbs) Valve size Weight Operating temperature and pressure ratings Temperature ANSI Class 150 flange ANSI Class 150 flange ANSI Class 300 flange ANSI Class...

High Pressure Control Valve - Model 4418F Valve characteristics Pressure Drop for Natural Gas (SG = 0.65) Pressure drop for natural gas at 60°F 1", 1 1/2", and 2" Flowrate of gas – cubic feet/minute x 100 Flowrate of air – cubic feet/minute x 100

High Pressure Control Valve - Model 4418F How to order Use the table below to select the unique specification of your 4418F high pressure control valve: Example code Valve model & revision Code Description Model & Revision Level 4418F Valve size and type 1" 2-way, normally closed (unapproved) 2-way vented, normally closed (unapproved) PED category IV, ATEX II 2 G X, 2 way, normally closed PED category IV, ATEX II 2 G X, 2 way vented, normally closed Spool component Pilot 'A' & vent ports Stainless steel Viton/PTFE (approved for PED, ATEX & NACE) Viton/PTFE (unapproved) Viton/PTFE...

High Pressure Control Valve - Model 4418F Service kits SELF SEALING SCREW WITH SELF SEALING SCREW WITH POZI DRIVE HEX DRIVE

High Pressure Control Valve - Model 4418F Service kits Model 4418F, 2-way Service kit for seals Model 4418F 2-way vented Closed position proximity switch Viton Model 4418F 2-way vented Open position proximity switch Model 4418F 2-way Open or closed proximity switch PTFE main seal PTFE vent seal Operation and Maintenance Manual LOCTITE thread locker

High Pressure Control Valve - Model 4418F Valve dimensions Threaded Valves 1/4 Pipe Thread 54 (2.1) 1 1/2" Pipe Threads (2 Ports) 2" Pipe Thread (50.8) (2 Ports) 1/4 Pipe Thread Optional Control Supply, Plugged 3/8 Pipe Thread Vent Port (when fitted) Flanged Valves ALL OTHER DIMENSIONS ARE SAME AS 1 - 1/2" VALVE Valve showing solenoid 12.7 (0.5) 1/4 Pipe Thread Optional Control Supply, Plugged C1 3/8 Pipe Thread Vent Port (when fitted) Flange connections Dimensions in mm (inches) ANSI 1-1/2” 150lb Raised face thickness (C1) Bolt hole size Bolt hole quantity

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