Providing Sales & Service To The Water-Wastewater, Power, Paper & Process Industries Since 1911
OVERVIEW • Proper approach for actuator maintenance and repair. • Basics include: proper identification, maintenance areas, quick repairs and upgrades.
The Beginning • Valve or Actuator Issue? • If the Actuator, what type?
MAINTENANCE IS ALWAYS LESS EXPENSIVE THAN REPAIR! PREPARATION IS KEY Retrieve any and all tagging information. Locate any in house O&M manuals. Locate and review drawing(s). Identify critical equipment that is affected by the repair. Secure parts and tool(s) needed.
Attached to? • Plug Valve • Butterfly Valve • Gate Valve • Slide Gate • Damper
Actuator Types • Manual • Hydraulic • Electric • Pneumatic
Actuator Sub-Types • Spring Return Pneumatic Fail Safe • Spring Return Electric Fail Safe • Electro-Hydraulic Fail Safe
Special Actuators • Pump Check Valves • Control Valves • Extensions • Special Flows • Unusual Media • Critical Service • High/Low Temps
COMMON ACTUATORS • Electric vs Pneumatic • Quarter-turn vs Multi-turn • Open/close vs Modulating
PNEUMATIC ACTUATORS • Cylinder, Diaphragm or Rotary Vane? • What brand? • Open/close or Modulating? • Fail Safe?
Control Actuators
Eleven models (to 12,000 pound-inches) Materials are pressure die-cast in titanium stabilized zinc-alloy (ZL16) of Construction The remaining five larger models (to 168,000 pound-inches) are cast aluminum that conform with LM-25 and ASTM 356.1 specifications Shaft assembly is either stainless steel or zinc plated ductile iron Polyurethane seals with stainless steel expanders *Side plate design reduces air consumption
ELECTRIC ACTUATORS • What brand? • Voltage/phase? • Control voltage? • Internal heater? • Fail Safe?
• Electric Actuators • Multi-turn • Quarter-turn • Linear • Integral Controls • Gearboxes • Worm gearboxes • Lever arm drives • Bevel gearboxes
Model SA Multi-turn Actuator • Mechanical design features (continued) – separable output drive • torque only (B drive) • torque and accepts thrust (A drive) • spring loaded thrust unit (AF drive) • linear drive (LE drive)
AUMA Generation.2 / A Step Beyond Features Include: Overview: At the forefront of technological Handwheel Activation development, also compatible with previous - Spring-loaded AUMA actuator designs, and includes increased - Signaling switch and lockable (option) modulating capability along with manual mode indication and enhanced enclosure. Operation via local controls: - Permanent larger, brighter backlight during operation Preventative Maintenance: - Continuous temperature recording on: motor, gearing, electronics and vibration sensors Intelligent Self-Diagnosis: - Self monitoring functions in combination with AC 01.2 - Diagnosis indication include torque curves and time-stamped operation log
Non-Intrusive (available on SA and SAR)
Non-Intrusive Setting elements Display with clear texts 4 lines each with 20 digits Push-buttons , , ↵ , C Password protection
Remote Mounting Wall bracket available Useful feature in remote application Remote Position Indication
Double Seal Prevents the ingress of water from the terminal compartment migrating to the remainder of the actuator
Double Seal Completely potted barrier between the electrical conduit and the electronic controls
Multi Turn Worm Gear Actuator on a Cable Drum Tainter Gate Hoist
Conclusion • Assessment • Look and listen • Record serial numbers and tag numbers • Review process conditions • Review all energy sources • Retrieve and review documentation • Consider improvements/upgrades • Rely on local representative support • Always keep safety first
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