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Schneider Electric MK-3xxx Series Pneumatic Damper Actuators

Pneumatic Damper Actuators
MK-3xxx Series

Proportional pneumatic actuator with 8 in.² (52 cm²) effective area used to control dampers, mixing boxes, air valves, etc., in heating, ventilating, and air conditioning systems.

• Rugged cast aluminum bodies.
• Long lasting rolling diaphragm.
• Provisions for adjustable stroke-stop

Select a link under the "item" tab below to order.

Cat #(kPa)(psig)Starting Pressure psigStarting Pressure kPain. (mm)Based on 1.5 psi (10 kPa) Pressure to Actuator lb (N)15 psi (103 kPa) Supply Dual Press. System lb (N)15 psi (103 kPa) Supply Single Press. System **** lb (N)20 psi (138 kPa) Supply Single or Dual Press. System **** lb (N)15 psi (103 kPa) Supply Dual Press. System lb-in. (N-m)15 psi (103 kPa) Supply Single Press. System **** lb-in. (N-m)20 psi (138 kPa) Supply Single or Dual Press. System **** lb-in. (N-m)
MK-310121 to 553 to 83 ±121 ±73-1/2 (89), adjustable 2 to 4 (51 to102)12(53)44(196)21(2.37)96(427)21(2.37)56(249)21(2.37)
MK-311134 to 695 to105 ±134 ±73-1/2 (89), adjustable 2 to 4 (51 to102)28(125)28(125)21(2.37)80(356)21(2.37)40(178)21(2.37)
MK-312155 to 908 to138 ±155 ±73-1/2 (89), adjustable 2 to 4 (51 to102)52(231)4(18)21(2.37)56(249)7(0.79)16(71)21(2.37)
MK-314121 to 903 to133 non-adj.21non-adj.3-1/2 (89), adjustable 2 to 4 (51 to102)12(53)4(18)21(2.37)56(249)7(0.79)16(71)21(2.37)
MK-315121 to 41,62 to833 to 6,9 to 123 to 621 to 412-3/4 (70), adjustable 2 to 2-3/4 (51to 70)12(53)12 (53)21(2.37)64(285)21(2.37)24(107)21(2.37)
MK-316121 to 1,76 to1173 to 6,9 to 123 to 621 to 412-3/4 (70), adjustable 2 to 2-3/4 (51to 70)12(53)0(0)0(0)24(107)0(0)0(0)21(2.37)
MK-382155 t o908 to 138 ±155 ±12-3/4 (70), adjustable 2 to 2-3/4 (51to 70)52(231)4(18)21(2.37)56(249)7(0.79)16(71)21(2.37)
Construction:
Housing: Die cast aluminum
Diaphragm: Beaded molded neoprene
Stroke: Refer to Model Chart
Nominal Damper Area: Actuator sizing should be done in accordance with damper manufacturer’s specifications
Start point: Adjustable on most models ±1 psi, refer to Model Chart
Spring: Retracts actuator shaft on loss of air pressure
Maximum air pressure: 30 psig (207 kPa)
Ambient temperature limits:
Shipping: -40 to 160°F (-40 to 71°C)
Operating: -20 to 160°F (-29 to 71°C)
Air connections: 1/8 in. FNPT
Mounting: In any position. Mounting bracket and connector for 5/16 in. (8 mm) diameter push rod included with actuator
Dimensions:
MK-3100, MK4-3100 Series: 12 L x 5-7/8 W x 5-1/2 D in. (305 x 149 x 140 mm)
MK-3800 Series: 20-3/16 L x 7-1/4 W x 6-1/2 D in. (513 x 184 x 165 mm)


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