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Invensys Building Systems, Inc.
1354 Clifford Avenue
P. O. Box 2940
Loves Park, IL 61132-2940
www.invensysibs.com
Application
DuraDrive Linear Actuators are designed to mount
directly onto two-way or three-way globe valves without
the use of linkages. They provide linear travel to
operate valves from 1/2" to 2" VB-7xxx and
discontinued 1/2" to 1-1/4" VB-9xxx in chilled water, hot
water and steam applications up to 366 °F (186 °C).
Linear spring return actuators provide either two
position, floating or proportional modulation control
(depending on model selection) of valves in HVAC
systems.
Features
•
Two position models controlled by SPST controller
•
Floating models controlled by SPDT floating
controllers
•
Proportional models controlled by 0-3 Vdc, 6-9 Vdc,
0-10 Vdc, 0-20 mAdc, 2-10 Vdc, or 4-20 mAdc.
Control function direct/reverse action is jumper
selectable
•
105 lb force (467 newton) with 1/2" (13 mm) nominal
linear stroke
•
24 Vac, 120 Vac, and 230 Vac models
•
Rugged polymer housings rated for up to
NEMA 2/IP54
•
Overload protection throughout stroke
•
Automatically sets input span to match valve travel
•
Compact size to allow installation in limited space
•
Manual override to allow positioning of valve and
preload
•
Spring return operation
•
Direct mount to valves without separate linkage
•
Polymer housing rated for plenum use
•
Five year warranty
Printed in U.S.A. 5-04
MA51-710x Two Position Series
MS51-7103 Proportional Series
© Copyright 2004 Invensys Building Systems, Inc. All rights reserved.
MF51-7103 Floating Series
DuraDrive™ Linear Series
Spring Return Actuator
General Instructions
Mx51-710x
F-27169-3
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