1 Keystone Figure 777 Electric Actuator Models EPI-3 to EPI-151. Electric Actuator for Quarter-turn Valves For Output Torques to 15,100 Features and Benefits Permanently lubricated self-locking gear train eliminates the need for motor brakes. Standard manual override does not require use of levers or latches. Mechanical travel stops adjustable to 15 degrees in both directions for precise adjustment to valve travel requirements. Available in NEMA 4X or NEMA 7. enclosures with Factory Mutual, UL. or CSA approvals. UL recognized motor with thermal overload devices in motor windings protects the motor should overheating occur. Dynamometer calibrated torque switches available in units with 600. or more Output torque eliminate requirement for field calibration. Epoxy coated aluminum housings permit service in aggressive environ- ments. Explosion-proof versions utilize zinc-aluminum alloy for maximum enclosure integrity.
2 (Ductile iron hous- ings also available.). Visual mechanical position indicator for accurate visual reference of valve position. Exclusive K-CAM limit switch cams Optional Temperature: -40 F to 120 F. allow for simple and convenient travel (-40 C to 49 C). adjustment. Output torque: Up to 15,100 Direct mounting to Keystone Valves or (1706 Nm). readily adaptable to other Quarter-turn Voltage: Valves minimizes costs associated 120 VAC, 1 phase 60/50 hertz with adaptation. (EPI 3 to EPI 151). 220 VAC, 1 phase 60/50 hertz (EPI 3 to EPI 151). General Applications 208 VAC, 3 phase 60 hertz (EPI 6 to EPI 151). For remote control of any Quarter-turn 230 VAC, 3 phase 60 hertz application, for example: ball, butterfly, (EPI 6 to EPI 151). or rotary plug Valves , dampers, etc. 460 VAC, 3 phase 60 hertz (EPI 6 to EPI 151). Technical Data 575 VAC, 3 phase 60 hertz (EPI 6 to EPI 151).
3 Temperature: -20 F to 140 F 12 VDC (EPI 3 to EPI 36). (-30 C to 60 C) 24 VDC (EPI 3 to EPI 36). Making Flow Control Easier Keystone Figure 777 Electric Actuator Models EPI-3 to EPI-151. 1. 15. 14 16. 4 8. 7. 17 3. 21 11. 18. 19. 2. 12. 20 13. 5. 10. 9. 6. Materials Notes Part Material Material Standards (1) Industrial 1 Cover Aluminum (1, 2) ASTM A-380 NEMA 4/4X. Aluminum alloy (2) ZA-27 Zinc-aluminum alloy Ductile iron (2, 4) ASTM A-536-80 Grade 65-45-12 CSA 4/4X/6. 2 Base Aluminum (1, 2) ASTM A-380 (2) Factory Mutual Ductile iron (2, 4) ASTM A-536-80 Grade 65-45-12. FM/CSA explosion proof 3 Switch plate Aluminum (1, 2). Steel (4) (3) AWWA C-540-variation 4 Indicator shaft Stainless steel (1, 2, 3,4) 300/400 grade NEMA 4/4X. 5 Output drive Aluminum (1, 2) ASTM A-360 CSA 4/4X/6. Ductile iron ASTM A-536-80 Grade 65-45-12. 6 Annulus gear Aluminum (1, 2) ASTM A-360. (4) Marine and government variations Steel MIL-S-901C, MIL-STD-167-1, Bronze LP B1-B5 1400 API-607, (Type II, 7 Input gear Glass filled nylon (1, 2) Minlon Class I, Service III).
4 Steel (3, 4) ASTM A-216. 8 Worm gear Steel (1, 2). 9 Compound gear Aluminum (1, 2) ASTM A-360. Steel 10 Planetary carrier Zinc (1, 2,3) ASTM B-86. Steel 11 Belleville washers Steel Commercial grade 12 Handwheel input shaft Steel Stainless steel 300/400 Grade 13 Handwheel Aluminum (1, 2, 3) ASTM A-380. Cast iron (4) ASTM A-536. 14 Motor Commercial Commercial grade 15 Capacitor Commercial Commercial grade 16 Torque switches SPDT Commercial grade 17 Travel switches SPDT (1, 2, 3, 4) Commercial grade 600V, 10/20 A. 18 Terminal strip Commercial grade 19 Cover O-ring Nitrile Commercial grade 20 Travel stops Steel Commercial grade 21 Travel adjustment cams Delrin/Brass Commercial grade Minlon is a registered trademark of du Pont de Nemours & Company. Tyco reserves the right to change product designs and specifications without notice. Copyright 1998 by Tyco International Ltd.
5 Publication #927 ACT-777B EPI 3/99 p2. Keystone Figure 777 Electric Actuator Models EPI-3 to EPI-151. Principles of Operation 4. Since the fixed annulus is the refer- ence point for the epicyclic gear train, One of the most important features of the Output gear is also driven. the Figure 777 is the use of epicyclic gearing. The following explanation and 5. The worm gear can drive the fixed diagram describe, in sequence, how this annulus, but the fixed annulus cannot system is utilized in the Figure 777 drive the worm gear. Therefore, no Actuator . de-clutch mechanism is required for manual operation. Electric operation Torque limiting 1. The motor pinion gear drives the input gear. 1. Output torque puts a reaction onto the fixed annulus via the compound gear. 2. The input gear is directly fixed to the eccentric carrier and, therefore, drives 2. The reaction force on the fixed annu- it.
6 Lus tends to move the worm gear against the Belleville washers. This 3. The eccentric carrier moves the com- movement is proportional to Output pound gear around inside of the fixed torque. annulus. 3. The axial movement of the worm gear 4. Because of a one-tooth difference is converted to a rotation on the between the compound gear and out- torque shaft. This rotation moves the put gear, the Output gear rotates. This adjustable cams to trip the torque type of gear is inherently self-locking. switches. Manual operation 1. Turning the handwheel drives the manual input shaft. 2. The manual input shaft drives the worm gear. 3. The worm gear drives the fixed annu- lus. Belleville washers Handwheel input shaft Worm gear Motor Indicator shaft Input gear Pinion gear Compound Eccentric carrier gear assembly Output drive Bearings Fixed annulus gear Tyco reserves the right to change product designs and specifications without notice.
7 Copyright 1998 by Tyco International Ltd. Publication #927 ACT-777B EPI 3/99 p3. Keystone Figure 777 Electric Actuator Models EPI-3 to EPI-151. Available Options 120 VAC to the motor is interrupted. The Actuator will maintain its last Combined Servo-amp and Speed setpoint position. Upon restoration Control Module of the analog signal, the Actuator will resume modulating operation. The Servo-amp Module is used when the application requires the Actuator to This module is suitable for 4-20 mA. position the valve using an analog analog input signal and 120 VAC, command signal. one-phase 50/60 Hz applications only. The following command signals can be Anti-condensation Heaters utilized by the Servo-amp Module: Temperature regulated anti-conden- 4-20 mA sation heaters can be installed in EPI-3. mA through EPI-151 actuators and are available in 3 watt or 6 watt ratings. 10-50 mA.
8 Available voltages are 120/220 VAC, 1-5 VDC one-phase or 12/24 VDC. 2-10 VDC. Solid State Speed Control 0-5k, , and 0-135k ohms Module Feedback Potentiometer and This module has a voltage selector This module is used to extend Actuator Retransmission Module installed switch as standard, allowing the cycle time. Operating times for 90. module to be suitable for 120 VAC or degree rotation can be increased 220 VAC, single-phase applications. (decreased in speed) to the rated provided as standard, with other The speed control feature allows for speed minimum of the Actuator -up ranges available to satisfy specific independent adjustment of Actuator to 180 seconds. Two adjustment application requirements. cycle time for either direction. The potentiometers one for the open'. deadband adjustment permits stable direction and one for the close'. Retransmission Module operation in case of rapidly changing direction are provided on the module The Retransmission Module provides process signals.
9 This module is for ease of adjustment. a 4-20 mA analog feedback signal adaptable for either direct acting proportional to valve travel for remote (increasing signal to open') or reverse The speed control module is available indication or control interface acting (increasing signal to close') for 120 VAC or 220 VAC, single-phase applications. The Retransmission control applications. voltage applications and can be Module requires a separate 24 VDC. installed in EPI-6 through EPI-151. power supply. A 24 VDC power supply Fail-in-last-place Module actuators. For extended cycle times, can be installed in EPI-36 to EPI-151. a 30 minute variation of this module This module is used in conjunction with actuators to provide loop power. is available. the Servo-amp Module when the application requires the Actuator to Interposing Relays Potentiometers maintain its last position upon loss of Interposing Relays provide remote control signal.
10 Upon sensing loss of These devices are used to provide Actuator control utilizing 12, 24, or 48. incoming 4-20 mA analog signal, the continuous electrical signal of valve VDC or other control voltages. position. Resistance of 0-5k ohms is Interposing Relays allow the Actuator to interface with control systems that supply various types of voltage commands. This feature permits discrete signal control of an Actuator with voltages other than the Actuator motor voltage. Control Boxes A wide selection of Control Boxes are available for either integral mounting to the Actuator or for wall or pedestal mounting. Options such as indicating lights, push buttons, and/or selector switches can be provided to facilitate local operation. Control devices such Optional accessories include (left to right): Retransmission Module, Speed as reversing contactors, transformers, Control, Servo-amp, and Potentiometer.