2076 NORTHWOODS DR
MUSKEGON, MI 49442
PHONE (231) 788-7025
FAX (231) 788-7030
www.dynatorque.com
ISO 9001:2008 CERTIFIED
Page 1 of 7
IOMSRD
IOM FOR DYNATORQUE™ SPRING RETURN MANUAL OVERRIDE (SRD TYPE)
Revised: 4-15-11
Scope:
It is the purpose of this document to provide general installation, operation, storage, and maintenance
instructions for DYNATORQUE™ manual spring return override worm gear operator.
NOTE: DYNATORQUE SRD automated valve manual overrides may be used with electric, hydraulic or
pneumatic spring return valve actuators. For purposes of convention, the term “pneumatic actuator” will
be used to refer to torque-generating driving device (actuator). The term “operator” will refer to the
DYNATORQUE manual override.
Installation Tips:
All Cameron DYNATORQUE operators & accessories have been designed to transmit the rated output
torque of the operator. When designing mounting kits, torque transmission devices, or specifying
mounting hardware the operator rating should be considered. Cameron recommends using grade 5 and
higher bolts with lock washers for mounting DYNATORQUE devices to valve actuators, valve mounting
flanges and/or valve adaptation kits. DYNATORQUE components should not be installed in areas where
those components will be subjected to high temperatures, corrosive atmospheres, or high pressures
without prior knowledge by Cameron or unless originally designed for that purpose. Doing so may affect
the product warranty.
Cameron recommends a watertight seal be established at time of installation between the bottom of the
SRD override and the valve, as well as the top of the SRD override and the actuator mounting pad. Apply
a liberal amount of a liquid gasket material (Cameron recommends using DOW Corning RTV #732 multi-
purpose sealant) on both surfaces prior to SRD override installation. Make sure to surround the mounting
holes with sealant to assure a complete seal.
Installation:
The Cameron DYNATORQUE model SRD manual override operator offers safe and easy positioning of
valves when manually overriding a spring return pneumatic actuator. Each SRD operator comes complete
with a handwheel and machined or blank drive coupling, which can be easily removed for machining to
match the pneumatic actuator and valve stem requirements.
Important Note
: Since the external key in the blank drive coupling mentioned above is not contained in
the mating part in a traditional manor, it is necessary to bolt that key to the drive coupling to prevent
possible key roll. The key has been pre-drilled and counter-bored, and hardware has been supplied for
blank drivers. Position the key in the key slot to provide maximum engagement in the override output and
using the key as a guide, drill and tap two holes for the hardware provided.
The following steps should be taken to install the DYNATORQUE SRD override. Cameron recommends
operator mounting while on the test stand with the valve in the fail position.
Proper orientation and initial commissioning of the SRD manual override is a vital step as a part of the
total valve and pneumatic actuator system. [
The following information is designed for the installation start-
up procedure of a valve system including a DYNATORQUE SRD override operator. It is critical the
installer verify the pneumatic actuator, the valve, the SRD override, and drive coupling, and any adapting
bracketing are all in the correct orientation when fully assembled.]
