• TJ-12

AM3 Regulating Main valve DN20-100

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Product Detail

Product Tags

Technical parameters

  • Nominal pressure: 2.8MPa
  • Applicable temperature:-50℃ ~+120°c
  • Test pressure:4.2MPa
  • Applicable medium: ammonia, fluorine, propane,etc.

Characteristics

  • Flow regulating valves,servo-operated by different pilot valves screwed-in the main valve or mounted in an external pilot line.
  • The AM3 are designed to use with ammonia and other common fluorinated refrigerants, for liquid, suction,discharge or defrosting lines,and they have three ports, P,S1 and s2, to screw-in two or three pilot valves.
  • The relations between the ports where it is possible to screw-in the pilot valves on the AM3, are following:

1、The main valve will be open, if just one of the pilot valves connectedis closed, and it will be open if both pilots valves are open at thesame time.

2、The pilot valve screwed-in P, is connected in parallel with the pilot valves in ports $1 &S2, so the AM3 valve will be open if the pilotin Pis open,irrespective if the $1 or s2 pilot valves, are open orclosed,and the main valve will be closed if the pilot in P is closedand at least one of the pilot valves in s1 or S2, are closed at thesame time.

  • The degree of opening of AM3 valves is function of the differential pressure between the inlet and outlet, so if the pressure difference is △p = 0.3 bar, the main valve will be fully open,and if it is Ap = 0.2-0.3 bar, the degree of opening will be correspondingly proportional to Ap.

AM3 main valve-1

Name Type Size(mm) Kv Cv
DN ΦD Φd A H L L1
AM3
Main Valves Type
AM1 20 3/4″ 20 27 20 65 150 190 125 6 7
AM1 25 1″ 25 34 25 65 150 190 125 9 10.5
AM1 32 1 1/4″ 32 42 32 70 175 245 170 16 19
AM1 40 1 1/2″ 40 48 40 70 175 245 170 30 35
AM1 50 2 50 60 50 70 180 255 180 40 47
AM1 65 2 1/2″ 65 76 65 85 205 295 220 75 88
AM1 80 3″ 80 89 80 95 225 330 250 140 164
AM1 100 4″ 100 108 100 125 260 415 330 200 234

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