Keystone EPI 2 E006A0W500 Electric Rotary Actuator

Keystone EPI 2 Electric Rotary Actuator (Model: E006A0W500)

The Keystone EPI 2 Model E006A0W500 is an intelligent, compact quarter-turn electric rotary actuator engineered for high-integrity on/off and modulating flow isolation across commercial marine, offshore, and industrial processing systems. Manufactured under Emerson Final Control, the EPI-2 size 063/E006 platform delivers a constant torque output of 63 Nm (560–600 lbf·in) over a 90° angular stroke (field adjustable from 70° to 110° via mechanical travel stop bolts).

The unit features a dual-compartment die-cast aluminum housing coated with an epoxy powder polyurethane barrier, isolating terminal wiring connections from the sensitive digital motor-drive electronics. Built with an integrated high-efficiency epicyclical reduction gear train and a self-locking planetary mechanism, it prevents back-driving under dynamic flow velocities without requiring a mechanical motor friction brake.

The actuator’s wide-band universal power supply module accepts 100 to 240 V AC/DC (50/60 Hz), while its smart logic board integrates independently configurable stroking times (12 s to 26 s / 90°), electronic torque limit monitoring, non-contact absolute position sensing, and an internal anti-condensation space heater.

Model Details

• Manufacturer: Keystone / Emerson Final Control
• Series: EPI 2 (EPI-2 Intelligent Quarter-Turn Series)
• Model Code: E006A0W500
• Actuator Frame Size: Size 063 / E006
• Base Torque Rating: 63 Nm / 600 lb·in
• Universal Voltage Configuration: 100–240 V AC/DC single-phase
• Enclosure Rating: IP66 / IP68 (submersible down to 10 m for 48 hrs) / NEMA 4/4X/6

Technical Specifications

Compatibility

• Keystone butterfly valves: Direct mounting to Keystone Figure 221/222, Figure 990, Figure 920, and Figure 14 wafer/lug butterfly valves (Sizes DN40 to DN100 / 1.5″ to 4″ depending on seating elastomer and line delta-P).
• Vanessa Quarter-Turn Valves: Small-bore Series 30,000 Triple Offset Valves (Sizes DN50 / 2″).
• K-NRP & KTM Ball Valves: High-performance floating ball valves up to 2″ Class 150/300.
• Third-Party ISO 5211 Valves: Direct fit to generic F05 and F07 flange pads using swappable square/double-D drive sleeves (9 mm, 11 mm, 14 mm, and 17 mm inserts).
• Marine Dampers & Louvre Actuation: Direct linkage coupling for offshore ventilation and HVAC fire/smoke dampers.

Part Number Cross-References

• E006A0W500 (Base EPI 2 63 Nm Unit, 100–240 V AC/DC, Standard ISO Interface)
• EPI2-063 / EPI-2-063 (European metric designation for EPI 2 Size 063)
• Tyco / Keystone Figure 777 (Legacy pneumatic/electric predecessor replacement)
• Biffi F02 / Icon Series Size 060 (Equivalent Emerson mechanical envelope)
• Auma SG 05.1 / Rotork ROM-1 (Direct functional conversion replacement for quarter-turn valve packages)

Applications

• Marine Ballast & Bilge Manifolds: Remote open/close control of double-flanged ballast valves inside machinery spaces and cargo pump rooms.
• Auxiliary Cooling Water Loops: Modulating temperature regulation for main engine jacket water, central freshwater cooling, and auxiliary heat exchangers.
• Offshore Topside & FPSO Skid Automation: Fire-safe quarter-turn damper actuation and chemical injection manifold isolation.
• Shipboard Fuel Oil Treatment Systems: Bunkering line transfer valves, purifier inlet modules, and sludge transfer valves.
• Industrial Potable & Wastewater Treatment: Chemical dosing, aeration damper control, and clarifier effluent shutoff.

Frequently Asked Questions

What is the maximum torque output of the Keystone EPI 2 E006A0W500?

The Keystone EPI 2 Model E006 delivers a nominal maximum constant torque of 63 Nm (600 in-lbs) throughout its full 90-degree rotary travel. This torque limit can be dialed down internally between 40% and 100% using the built-in rotary selector switch to protect sensitive valve stems.

Can the Keystone EPI 2 run on both DC and AC power?

Yes. The model features a universal power supply module capable of accepting single-phase 100 to 240 V AC at 50/60 Hz or 100 to 240 V DC. It accommodates broad voltage variations (±10%) without requiring physical transformer tap changes.

How do I manually operate the valve during a power outage?

The actuator incorporates a permanently engaged manual handwheel override. You do not need to depress or disengage any clutch lever. Turn the handwheel to drive the valve mechanically. The planetary gearing safety design guarantees that the handwheel will not spin dangerously if the electric motor suddenly regains power.

How does the actuator detect valve position?

The EPI 2 uses a non-contact absolute digital encoder coupled directly to the main drive shaft. Because it is an absolute encoder, the actuator retains exact valve position calibration without wandering, even through prolonged shipboard blackout conditions or manual handwheel operation while powered down.

Can I upgrade this unit to 4–20 mA modulating control?

Yes. The E006 base unit is field-upgradable by inserting an optional OM1 module into the upper electronics bay. The OM1 module provides 4–20 mA (or 0–10 V DC) analog input control along with an active 4–20 mA position feedback transmitter.