Providing Sales & Service To The Water-Wastewater, Power, Paper - - PowerPoint PPT Presentation

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.

• Plug Valve
• Butterfly Valve
• Gate Valve
• Slide Gate
• Damper

Attached to?

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

Materials

• f Construction

 Eleven models (to 12,000 pound-inches) are pressure die-cast in titanium stabilized zinc-alloy (ZL16)  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

Overview: At the forefront of technological development, also compatible with previous AUMA actuator designs, and includes increased modulating capability along with manual mode indication and enhanced enclosure. Features Include: Handwheel Activation

• Spring-loaded
• Signaling switch and lockable (option)

Operation via local controls:

• Permanent larger, brighter backlight during
• peration

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