Equipment/ functions - Process Valve Solutions

More documents

Recommendations

Info

14 Design principle Control unit 2 Depending on the type of valve the actuator must be switched-off in the end position by limit or torque switches. For this purpose two independent measuring systems (limit switches and torque switches) are provided within the control unit. They measure the travel or the torque required at the output drive, respectively. The switches signalize to the actuator controls that the set tripping points have been reached, which then switch off the motor. The control unit may optionally be equipped with a magnetic limit and torque transmitter. The transmitter converts the mechanical parameters limit and torque into continuous electronic signals. In combination with the integral controls AUMATIC tripping points and tripping torques can be set non-intrusively, i.e. without using tools or opening the control unit. Electrical connection 3 The connections for motor and control cables are made on a 50-pole AUMA plug/ socket connector. If the plug/ socket is disconnected for maintenance work, the wiring remains undisturbed. The explosion-proof actuator types SGExC are provided with a special plug/ socket connector for explosion-proof actuators as a standard. Further information on page 14. 1 Mechanical position indicator The mechanical position indicator is used to indicate the valve position continuously. End stops 4 During manual operation the internal end stops limit the swing angle. The significant advantage of the AUMA design is that the low input torque, not the high output torque acts against the end stops. Thereby high safety against damage due to overload is assured. 3 4 1 2 6 5 7
Motor 9 An especially high starting torque is frequently required to unseat valves from the end position. The motors developed by AUMA fulfil this basic requirement. Apart from the predominantly used 3-phase AC motors, the actuators may also be equipped with 1-phase AC motors. When using actuators with 1-phase motors, the operating time can be adjusted. The motor is connected via an internal plug/ socket connector. This enables quick exchange of the motor, e.g. for change of output speed. Further information on page 16. 8 Gearing 5 The well proven principle of worm gearing, combined with a planetary gear, is used to reduce the motor speed to the required actuator output speed. Self-locking is achieved by the worm gearing. The gear housing is filled with lubricant for the whole lifetime. A change of grease or re-lubrication is not necessary. 9 Design principle Manual operation 8 For commissioning or in an emergency the part-turn actuator can be operated with the handwheel. Pull the handwheel until it disengages. The manual operation acts on the worm shaft due to an over-riding gear arrangement. The sliding worm which is used to determine the torque is located on the handwheel shaft. <strong>Valve</strong> attachment 7 The valve attachment is according to EN ISO 5211. On request, special connections are available. The gearbox can be positioned on the valve at every 90°. Coupling 6 The separate coupling facilitates the assembly of the actuator. It is placed on the valve shaft and secured against axial movement. Subsequently the actuator is fitted on the valve flange (Refer also to page 20). 15
Page 1 and 2: ISO 9001 ISO 14001 Certificate Regi
Page 3 and 4: AUMA part-turn actuators are employ
Page 5 and 6: ●Standard ■Option Equipment / f
Page 7 and 8: Modulating duty Input signal from p
Page 9 and 10: Adjustable torques Minimum and maxi
Page 11 and 12: Magnetic limit and torque transmitt
Page 13: Running indication (option) As an o
Page 17 and 18: Motor protection In order to protec
Page 19 and 20: Special connections For special cus
Page 21 and 22: Integral controls (option) with AUM
Page 23 and 24: Advantages of integral controls (op
Page 25 and 26: Explosion protection Lifetime Part-
Page 27 and 28: A Absolute encoder 11 Actor 4 Actua

Equipment/ functions - Process Valve Solutions

Create successful ePaper yourself

Delete template?

Save as template?