Flowserve Handwheels and Limit Stop - Manual

Rev. 6/93 Valtek No. 49015 © 1998 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611 5-1
Valtek Auxiliary Handwheels
and Limit Stops
Table of Contents
Page
1 General information
2 Installation
2 Side-mounted handwheels, size 25 and 50
(linear actuators)
3 Side-mounted handwheels, size 100 and 200
(linear actuators)
6 Top-mounted, continuously connected hand-
wheels, Size 100 and 200 (linear actuators)
7 Top-mounted, push-only handwheels (linear
actuators)
9 Declutchable handwheels (rotary actuators)
11 Push-only limit stops (linear actuators)
11 Pull-only limit stops (linear actuators)
GENERAL INFORMATION
The following instructions are designed to assist in
installing, operating, performing maintenance and dis-
assembling handwheels and limit stops mounted on
Valtek spring cylinder actuators. Product users and
maintenance personnel should thoroughly review this
bulletin in conjunction with the Valtek Installation, Op-
eration, Maintenance Instructions for Cylinder Actua-
tors (IOM 2), prior to working on the handwheels and
limit stops.
To avoid possible injury to personnel or damage
to valve parts, WARNING and CAUTION notes
must be strictly adhered to. Modifying this prod-
uct, substituting non-factory parts, or using main-
tenance procedures other than outlined could
drastically affect performance, be hazardous to
personnel and equipment, and may void existing
warranties.
WARNING: Standard industry safety practices must
be adhered to when working on this, or any other,
process control product. Specifically, personal
protective and lifting devices must be used as
warranted.
Valtek control valves are often equipped with auxiliary
handwheels of the continuously connected or push-only
type, allowing for manual operation of the valve in case
of air failure. Continuously connected handwheels can
also be used as a limit stop to limit valve travel in either
the open or closed position. Push-only handwheels are
designed to close the valve or limit opening. Limit stops
limit the actuator stroke in one direction or the other.
INSTALLATION
Valtek control valves, equipped with auxiliary hand-
wheels and limit stops, are installed as outlined in the
maintenance bulletin for each type of valve. Refer to the
sales catalog or certified dimensional drawing for esti-
mated overhead clearance requirements. To allow for
manual operation and maintenance, adequate access
to the handwheel or limit stop must be provided.
SIDE-MOUNTED, CONTINUOUSLY
CONNECTED HANDWHEELS,
SIZE 25 AND 50 (Linear Actuators)
Operation
If air failure should occur, or if manual control of the
valve is desired, the side-mounted, continuously con-
nected handwheel can be operated as follows:
1. Set the three-way bypass valve (located on the
supply line to the positioner) to 'manual' to vent the
air pressure from the actuator.
NOTE: Three-way valves are installed in the supply
line only when there is no lock-up system or volume
tank. On volume tank or lock-in-place systems, the