Product Overview

Table Of Contents

European Standard EN 55022

Refer to Table-2 and Table-3 to identify applicable models.

Warning: This is a Class A (European Classification) product. In a domestic environment

this product may cause radio interference in which case the user may be required to take

adequate measures.

MOUNTING

Preferred mounting is with the actuator in an upright position in a weather protected area.

Note: The MP-21xx series requires upright mounting. The adjustable speed actuators

cannot be mounted upside down, with the output shaft up or with speed adjustment screw

pointing up.

It is recommended that valve actuators be mounted above the centerline of the valve body.

When selecting a location, allow sufficient room for accessories and for service of the

product.

Direction of Actuator Rotation

All references to the direction of actuator rotation are based on looking at the front of the

actuator, where the splined output shaft extends from the front case of the actuator.

Linkage Assembly Damper

Caution: The damper must not stop the actuator before it has reached its electrical limit of

travel or permanent damage can occur to the actuator.

1. During installation of the linkage assembly, the actuator should be powered and be able

to be controlled manually.

2. Mount the actuator in an appropriate position near the damper. Refer to Figure-35.

Actuators must be linked to the damper so that it can complete its full stroke. Damper

rod that is too long is not rigid enough for good control and damper rod that is too short

makes it difficult to adjust the linkage.

3. Attach a balljoint to the actuator and damper crank arms at the correct position in the

crank arm slot depending on the application. Refer to

Figure-34, Table-7, and Table-8

for application settings. The use of 180° rotation damper actuators provides the best

close-off at the end of stroke and the best controllability (turn down ratio).

4. Typically the damper should be linked for an angular rotation of less than 90° that

provides the required flow (typically 60°). This provides the optimum close-off and

controllability.

Table-7 Balljoint Position on Actuator and Damper Crank Arms with 180 Degree

Rotation Actuators.

Desired Damper Rotation

Balljoint Position on Actuator

Crank Arm

Balljoint Position on Damper

Crank Arm

90° Prick Point (2-1/4") End of Slot (3-1/8")

80° 2" End of Slot (3-1/8")

70° 1-3/4" 3"

60° 1-1/2" 3"