ROTORK ‘A’ RANGE SYNCROSET ACTUATORS ARE
PARTICULARLY SUITABLE FOR:
 Applications where actuators with separate mounted starters
would be preferable. For example, where there are high levels of
vibration, high ambient temperatures or where accessibility to the
motor operated valve is limited after installation.
 Installations where traditional electro-mechanical integral
controls are preferred for the continuity of house specifications.
 Sites using DC or single phase power supplies.
 Failsafe operation by pneumatic or battery power.
For most 3 phase applications the Rotork ‘IQ’ actuator provides
the best combination of economy and performance for the

motorisation of valves and dampers. 

SINGLE PHASE ‘A’ RANGE
Syncropak and Syncroset actuators up to size 30A are available
for use with single phase power supplies of 110, 220 and 240
Volts 50Hz and 120V, 60Hz.
DC ‘A’ RANGE
DC powered Syncroset and Syncropak actuators are available for
applications where valve operations must be maintained even in
the event of single or 3 phase power failure. The DC version of
the ‘A’ Range actuator has been developed from the standard
Syncroset and Syncropak watertight and Factory Mutual certified
designs, using a flange mounted permanent magnet DC motor.
The range of supply voltages catered for as standard is 48V and
110V DC. For further information see publication E221E.
FOLOMATIC CONTROL
This electronic package enables a Syncropak actuator to position
a valve in proportion to analogue current or voltage signal. It is
suited to systems with relatively slow rates of change, eg. level
controls in water and sewage systems. See publication AE4/0.1.
Not available with size 13 actuators.
PAKSCAN TWO WIRE CONTROL
The Rotork two-wire control system for valve actuators offers
considerable cost savings on cabling and control interface as well
as design engineering.
The system consists of a master station which controls and
monitors up to 240 actuators via field units mounted in the
actuators and connected by a two wire loop.
The total installed cost of the conventional multicore cabling can
be as much as twice the cost of the valve actuators. With a
typical installation, such as an oil tank farm, savings of up to 75%
can be made by the use of the two wire system, though savings
will vary, depending on complexity and control distance.
Further considerable savings can also be achieved if the
actuators are controlled by computer, since the master station
equipped with RS232C port can be connected without the need
for further interface.
The combination of two wire cabling and elimination of control
interface greatly diminish the design engineering required as well
as reducing commissioning time (less possibility of error) thereby
achieving even greater savings.
The Rotork two wire control system can easily be fitted or
retrofitted to the ‘IQ’ Range, 1400, 1600 Series ‘A’ Range or ‘AQ’
Range or ‘Q’ Range actuators. It can also be used with other
devices such as pumps, level gauges, sensors etc. See
publication S000E.
FAILSAFE SYSTEMS
A standard Rotork electric motor actuator provides a simple
economic and reliable means of operating valves under all normal
conditions except during electrical supply failure when the valve
stays put. If the system is such that the valve must be operated
during power failure, some form of stored energy is essential.
Rotork are able to offer two such stored energy systems.
DC Actuator Emergency Shutdown System
This system is based on the use of Rotork DC powered ‘A’ Range
Syncropak actuator in conjunction with an AC fed DC battery
console. The system is designed to allow actuators to be
powered from the DC battery source under both normal operating
conditions and emergency shutdown conditions. This
continuously confirms the availability of the DC power system. In
addition a relay fitted inside the Rotork DC Syncopak actuator
monitors availability of the DC battery supply and the actuator
control circuit together with a battery status indication relay in the
battery console. Each battery cubicle is designed to carry a single
phase battery charger together with batteries for powering one
DC Syncropak actuator. The battery cubicle also includes a relay
for monitoring the single phase input power supply to the battery
charger. Contacts of this relay are used to indicate AC power
supply failure, initiate ESD operations of the actuator and to
disconnect any existing control signal. While the actuator maybe
supplied as watertight only or watertight and flameproof, Factory
Mutual Certified, the battery cabinet is only available as watertight
IP66. See publication E221E.
Electro-Pneumatic Valve Actuator Emergency Shutdown
Systems
This uses the Rotork Type PA failsafe electro-pneumatic actuator.
PA actuators are Rotork ‘A’ Range Type 11A, 16A, 30A, 40A, 70A
or 90A actuators to the Syncroset or Syncropak Specification
having a pneumatic air motor flange mounted onto the electric
motor. Since the pneumatic motor maybe powered by stored or
line gas at 5-7 bars (80 to 100psi). The pneumatic operation of
the PA actuator requires the installation of suitable pneumatic
controls. Rotork is able to supply lockable and weatherproof, IP55
cabinets containing these controls and suitable for either wall or
stand mounting.