AMLX are two steps servo-operated valves normally closed and pneumatic opening by means of hot gas form external acting upon power piston，the two steps of opening are folIowing.
1-Step one the valve opens approxl 10% of the total when the coils of the pilots are powered
2-Step two the valve opens automatically 100% when the differential pressure across the vaIve reaches 1-1.5 bar
As the AML valves On the bonnet of the AMLX are fitted one External interface，nut & nipple connection to gas
inlet，and two solenoid pilot AEVM type，one AEVM-NC，(nomaIly closed pilot) on A，and one AEVM-NO，(normally open pilot)on B.
The soIenoid A shut-off and opening the flow of gas to the top piston camera，to close or open the main valve，but the solenoid B has to be opened to relieve this gas of the Camera to allow closed again the main valve when the pilot A is closed.
AMLX valves are designed to use with ammonia and other common fluorinated refrigerants，for use in suction lines opening against very high differential pressure and for any application that need automatical shut off valve to working with a external line pressure equal or less than inlet pressure of the valve.
