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.
