Brochure

MK-7821, MK-7921

Specifications

Accessories

Construction

Housing Die cast aluminum.

Diaphragm Replaceable beaded molded neoprene.

Assembly

Actuator(s) and positive positioner (AK-42309-500) are factory mounted on a frame of channel and

angle iron.

Rotary output Provided by a driving lever arm connected to a bearing supported jackshaft.

Stroke

Rotary output of 60q driving lever arm connecting point adjustable from 4 to 13 in. (102 to 330 mm),

in 1 in. (25.4 mm) increments, from centerline of jackshaft.

Nominal Damper Area Actuator sizing should be done in accordance with damper manufacturer’s specifications.

Connecting linkage AM-394 adjustable 15-3/4 to 24-3/4 in. (400 to 629 mm) is included to link actuator to damper.

Spring Retracts actuator shaft on loss of air pressure.

Maximum air pressure 30 psig (207 kPa).

Ambient temperature limits

Shipping -40 to 160qF (-40 to 71qC).

Operating -20 to 160qF (-29 to 71qC).

Air connections Barbed fitting for 1/4 in. plastic tubing.

Mounting Floor.

Dimensions 30-1/2 H x 16 W x 20 D in. (775 x 406 x 508 mm).

Model No. Description

AM-535 Clevis with 3/8 in. FNPT.

Maintenance Parts

PND-90 High temperature diaphragm.

PND-202 Diaphragm.

PND-245-103 2 to 8 psig spring.

PND-245-108 8 to 13 psig spring.