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 of 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

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