For proportional pneumatic actuator with 3 in.² (19 cm²) effective area used to control small dampers and mixing boxes.
Features • All-plastic construction.
• Meets UL-465 requirements for air plenum mounting. • Ideal for VAV terminal unit control.
MK-121xx Series Damper Actuators, Proportional
stroke item
nominal operating range psi
in. (psi)
starting pressure non
adjustable
return stroke
Based on 1.5 psi
pressure to actuator lb
MK-12100 3 to 8 MK-12110 5 to 10 MK-12120 8 to 13 MK-12140 3 to 13
2 2 2 2
3 5 8 3
4.5
10.5 19.5 4.5
15 psi supply Dual press. system lb
16.5 10.5 1.5 1.5
power stroke
15 psi supply single press. system *** lb
21 15 6 6
* Force and torques based on factory set stroke, starting pressure, and 90° rotation of driven damper shaft. ** Nominal torque for actuators is based on 1.5 psi (10 kPa) pressure change at the actuator. *** Adjust pressure reducing valve so that listed pressures are available at the actuator.
Model AK-42309-500 Positive Positioning Relay
item AK-42309-500ª Descriptions Positive Positioning Relay with Mounting Linkage.
20 psi supply single or Dual press. system *** lb
36 30 21 21
15 psi
supplyDual press. system lb-in.
4.5 4.5 1.5 1.5
15 psi supply single press.
system *** lb-in.
4.5 4.5 4.5 4.5
20 psi supply single or Dual press. system *** lb-in.
4.5 4.5 4.5 4.5
Maximum Force *
power strnominal torque ** proportional control *
C
N800-0555 Series Positive Positioning Relay
item
N800-0555-BOX N800-0555-P
Descriptions Positioner only.
Positioner kit. Includes one positioner, one feedback arm, and 5 and 10 psi feedback springs for M556 (6 in. stroke), M573 (3 in. stroke), and M574 (4 in. stroke).