Product Overview

81
Liquid Level Controls
McDonnell & Miller
• For the actuation of pneumatic valves or relays in heating,
air conditioning and process systems in hazardous or
non-hazardous locations
• Provides an air pressure signal proportional to
the liquid level
• Available as Direct Acting or Reverse Acting
• A float operated armature senses the liquid level
• Switch mechanism is completely sealed from the liquid
• Two gauges are provided to display the supply and
output pressures
• Alternate air connection tappings are provided for
greater flexibility in piping
• Operating range: 1 - 2" (25 - 51mm)
• Air pressure
– Supply 20 psi (1.4 kg/cm
2
)
– Output 3 - 15 psi (.2 - 1 kg/cm
2
)
• Maximum water temperature 406°F (208°C)
• Maximum pressure 250 psig (17.6 kg/cm
2
)
Series PFC
Float Actuated Pneumatic
Series PFC
Liquid Level Controls
Dimensions, in. (mm)
A B C D E F G H J K L
NPT NPT NPT NPT NPT
1
⁄
8
1
⁄
8
7 (178) 8 (203) 1 1 1
3
⁄
4
(45) 2
5
⁄
8
(67) 4 (102) 20
3
⁄
4
(527) 1
Model Part Weight
Number Number Description lbs. (kg)
P F C - 1 - G 1 8 0 8 0 0 Direct acting pneumatic liquid level control 3 8 . 5 ( 1 7 . 5 )
P F C - 1 - G R 1 8 0 8 0 1 Reverse acting pneumatic liquid level control 3 8 . 5 ( 1 7 . 5 )
Water Level Adjustment
Output Air
Model Type Level Adjustment Range
in. (mm)
P F C - 1 - G Direct Acting 1 - 2 (25 - 51)
P F C - 1 - G R Reverse Acting 1 - 2 (25 - 51)
O r dering Info r m a t i o n
10. Switchs-valvs 80-85• 3/6/07 1:55 PM Page 81