Moniteur 40 Series VALVE Positioners - Manual (Page 3)

Moniteur
M O N I T E U R D E V I C E S I N C O R P O R A T E D
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Page 2
Input Signal 3 - 15 psig
Split Range Available
Impedance N/A
Stroke Range: 0 - 90°
Supply Range: 20 to 100 PSIG
Air Delivery: 7 SCFM
Air Consumption: 0.26 SCFM
Operating Temperature: -4° to +158° F
Linearity +/- 1%
Hysteresis 1% max.
Sensitivity +/- 0.5%
Repeatability +/- 0.5%
Pneumatic Connections: 1/8 NPT - Gauge Ports
1/4 NPT - Supply / Outlet
Enclosure: Designed to NEMA 4, 4X
Enclosure Weight: Approx. 4.8 lbs.
Input Signal 4 - 20 mA @ 24 VDC
Split Range Available
Impedance 250 +/- 15 ohms
Stroke Range: 0 - 90°
Supply Range: 20 to 100 PSIG
Air Delivery: 7 SCFM
Air Consumption: 0.15 SCFM
Operating Temperature: -4° to +158° F
Linearity +/- 1%
Hysteresis 1% max.
Sensitivity +/- 0.5%
Repeatability +/- 0.5%
Pneumatic Connections: 1/8 NPT - Gauge Ports
1/4 NPT - Supply / Outlet
Enclosure: Designed to NEMA 4, 4X
Enclosure Weight: Approx. 6.5 lbs.
Specifications -3-15 psi Pneumatic
Air Supply
Pilot Valve
Inlet Valve B
Counter Weight
Compensation
Spring
Zero
adjusting
Spring
Zero
adjusting
Screw
Flapper
Nozzle
Automatic
Manual
Inlet Valve A
Actuator
Terminal Box
Armature
Torque
Motor
Plate
Spring
Feedback
Spring
Stopper Screw
Do not move
Sensitivity adjusting screw
(Adjusts GAIN)
Change-over screw
(Built-in bleed restriction)
Exhaust Valve
Diaphragm
Principle Of Operation
As the signal current from the controller
increases, the plate spring of the torque
motor works as a pivot. As the armature
receives the rotary torque in the counter-
clockwise direction, the counter-weight
is pushed to the left, the clearance
between the nozzle and the flapper will
increase, and the nozzle back pressure
will decrease. As a result, the exhaust
valve of the pilot valve moves to the
right, and the output pressure of OUT1
increases (as OUT 2 decreases) to
move the actuator.
The movement of the actuator in turn
rotates the feedback shaft and spring.
The actuator stays in the position where
the spring force is balanced with the
force generated by the input current in
the torque motor. The compensation
spring is for direct feedback of the
motion of the exhaust valve, and is
connected to the counter weight to
enhance the stability of the loop. The
zero point is adjusted by changing the
zero adjustment spring tension.
Specifications - 4-20 mA Electro-Pneumatic
OUT 1
OUT 2
Installation and Operating Instructions
Series 40 Positioners