CONTROL MODULES (PILOTS) FOR ANY REGULATOR
When installed, these control modules (pilots) enable
the main regulator to perform different control functions
(see page 3, Regulator Variations). Pilots are normally
factory installed, but can be retrofitted or interchanged
in the field. The nonrising stem can be adjusted by using
a ¼" wrench. Catalog numbers are for the
screw-on pilot module. Interchangeable
with Danfoss PM Series, size permitting.
INLET PRESSURE
Opens as inlet pressure rises. Range: A,
0 to 150 psig (0 to 10 bar g), Part 75-1097;
Range B, 30 to 300 psig (2 to 21 bar g),
Part 75-1098; Range C, 100 to 550 psig
(6 to 38 bar g), Part 75-1204; Range D, 30
to 450 psig (2 to 31 bar g), Part 75-1205,
or, Range V, 20" to 130 psig (–0.67 to
+9 bar g), Part 75-1099. Catalog M3.
Compact welded pressure pilot. Range A,
0 to 150 psig (0 to 10 bar g), Part 75-1126.
Standard only on valve sizes ¾" to 1¼".
Catalog M3W.
OUTLET PRESSURE
Opens as outlet pressure drops. For hot
gas bypass to suction or for controlled
supply pressure of defrost hot gas. Also
used for compressor suction pressure
limiting (crankcase pressure regulator).
¼" NPT connections for outlet pressure
gauge and sensing line (tubing not
included). Range B, 30 to 300 psig (2
to 21 bar g), Part 75-1101; or Range V,
20" to 130 psig (– 0.67 to +9 bar g), Part
75-1100. Catalog M3O.
DIFFERENTIAL PRESSURE
Maintains set-for differential between
inlet and outlet or other pressure source.
For pump relief or any differential control.
¼" NPT connection for pressure sensing
line (tubing not included). Range A, 0
to 150 psi (0 to 10 bar) difference, Part
75-1081, Catalog M3L.
PNEUMATICALLY COMPENSATED
Air or other pressure in the bonnet raises
inlet pressure on a 1:1 ratio. ¼" NPT
connection. Range A, 0 to 150 psig (0 to
10 bar g), Part 75-1081, or Range V, 20 to
130 psig (-0.67 to 9 bar g), Part 75-1249.
Catalog M3P.
RESEATING RELIEF
Opens wide when pres sure exce e ds
pressure setting and repeatedly reseats
after operation. Defrost relief or high-to-
low system relief. Set and tagged. The
standard setting for ammonia defrost is
70 psig (4.8 bar g). Range A, 0 to 150 psig
(0 to 10 bar g), Part 75-1103; Range B, 30
to 300 psig (+2 to 21 bar g), Part 75-1104;
Range C, 100 to 550 psig (6 to 38 bar g),
Part 75-1202; Range D, 30 to 450 psig (0
to 31 bar g), Part 75-1203. Catalog M3K.
Compact welded pressure pilot. Range A,
0 to 150 psig (0 to 10 bar g), Part 75-1127.
Standard on valve sizes ¾" to 1¼". Catalog
M3KW.
SOLENOID
N o r m a l l y c l o s e d . O p e n s w i d e w h e n
energized. Requires coil. See page 2 for
coil selection. Less coil: Part 70-1052,
Catalog MS.
ELECTRONICALLY CONTROLLED
Mounted electronic actuator changes the
pressure set point in conjunction with a
controller and temperature sensor for either
air or liquid. Very precise. See page 10 for
the control package which includes the
necessary controller and sensor. Range:
J1, 0 to 85 psig (0 to 6 bar g), Part 27B1140;
or J2, 25 to 115 psig (1.7 to 8 bar g), Part
27B1141. Catalog M3J.
TEMPERATURE OPERATED
B u l b o p e n s t h e c o n t r o l m o d u l e o n
temperature rise to maintain a constant
temperature. Part 27B1110 with a range
of – 40°F to +30°F (– 40°C to 0°C) or Part
27B1111 with a range of +15°F to +75°F
(–10 to +25°C). Catalog M3T.
EXTERNAL CONNECTION
Enables a remote pressure source to be
introduced to the control via a pilot line
(replaces a pilot). ¼" NPT with separate 4"
(100 mm) long weld nipple, Part 35-1015,
Catalog M3E25.
BLANKING PLUGS
To be used in a control module port when
the port is not utilized. Stopping plugs
have square head and are marked with
“0” (75-1063). Straight through flow plugs
have a hex head and are marked with “1”
(75-1064). Catalog M3S (stopping) or M3B
(straight through).
M3
M3W
M3K
M3O
M3L
M3P
M3B
M3S
M3E25
M3T
M3J
MS
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R429d
AUG 2015