Flowserve LY Series Limitorque - Manual (Page 14)

Limitorque LY Series: LY 1001, LY 2001 and LY 3001 FCD LMENIM1501-00 – 11/11
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5.4 Installation Overview
a CAUTION: Be sure to complete each step of the installation overview before electrically
operating your actuator. If the actuator is already mounted to a valve from the manufacturer,
verify that the actuator is mounted according to the following overview. Failure to follow the
installation procedures could result in personal injury and/or improper operation and could
cause damage to the equipment.
1. Mount Torque Nut (piece #32) in the actuator as shown in Figure 5.3 with the following alignment:
A. For LY 1001 – Stop Lugs facing the Actuator Mounting Adapter with index lines positioned to
face the Mechanical Stop Screws.
B. For LY 2001/3001 – Torque Nut axially aligned on the Drive Sleeve so that the bottom of the nut
is positioned inside the Actuator Mounting Base.
2. Insert the Retaining Drive Ring (piece #165 for LY 1001, piece #109 for LY 2001/3001) on the
Torque Nut (piece #32) to hold the Torque Nut in place in the actuator.
3. Mount the LY actuator on the mounting flange of the valve or other actuated equipment. High-
strength (minimum SAE-Grade 5 120,000 psi tensile strength) hex head or socket head cap screws
with lockwashers are recommended. The actuator mounting tap quantities and thread sizes are
detailed in Table 5.2.