RWF ROTARY SCREW COMPRESSOR UNITS
MAINTENANCE
S70-600 IOM
Page 34
THERMAL EXPANSION VALVES
In situations where system load conditions increase or de-
crease over extended periods of time and the liquid injec-
tion thermal expansion valve is not adequate for the new
conditions, an improvement in valve performance may be
achieved by increasing or decreasing discharge tube size.
NOTE: DO NOT ATTEMPT TO ADJUST SUPERHEAT
ADJUSTMENT STEM ON BOTTOM OF VALVE IN AN EF-
FORT TO CHANGE THE VALVE’S PERFORMANCE. THIS
ADJUSTMENT IS PRESET AT THE FACTORY. ONLY AD-
JUST 1/4" BLEED VALVE ON EQUALIZING LINE.
Figure 28 - TYPE D (1-15 TONS) R-717
Figure 29 - TYPE A (20-100 TONS) R-717
Figure 30 - TYPE H (2-1/2 TO 16 TONS) R-22
TX VALVE MODE PORT SIZE DISCHARGE TUBE SIZE
DAE - 1 1/16 1/32
DAE - 2 1/16 1/16
DAE - 5 7/64 5/64
DAE - 10 3/16 7/64
DAE - 15 3/16 5/32
AAE - 20 5/16 1/8
AAE - 30 5/16 5/32
AAE - 50 3/8 3/16
AAE - 75 3/8 NONE
AAE - 100 7/16 NONE
Figure 31 - TYPE M (12 TO 34 TONS) R-22
Figure 32 - TYPE V (52 TO 100 TONS) R-22
R-717 TX VALVE SIZES
R-22 TX VALVE SIZES
TX VALVE MODE FPT CONNECTION
HVE - 2-/1/2 1/2
HVE - 5-1/2 1/2
HVE - 11 1/2
HVE - 16 1/2
MVE - 12 1
MVE - 21 1
MVE - 34 1
VVE - 52 1
VVE - 70 1
VVE - 100 1
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