Updated_-_35_22_18_-_Gate_Actuators_Revised_2025_01_14_0003.pdf

GVIC Fish Screen Rehabilitation Upper Colorado River Endangered Fish Recovery Program Solicitation No. 140R4024R0024

Gate Actuators

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SECTION 35 22 18

GATE ACTUATORS

PART 1 GENERAL

MEASUREMENT AND PAYMENT

Gate Actuators:

1. Measurement: Each

2. Payment: The Price offered in the Price Schedule. The unit price shall include the cost of all labor, equipment, and materials required for furnishing, installing, and testing the gate actuators and all associated components in accordance with the provisions in this section and referenced sections and as shown in the drawings.

Cost:

1. Include all costs for furnishing and installing electrical connections in the price offered in the Price Schedule for Complete Electrical System in Section 26 05 02.

DEFINITION

In this section, the term “Gate” shall include the following devices:

1. Check Structure Gates: include gate actuator and components for the control panel.

SUBMITTALS

Submit the following in accordance with Section 01 33 00 – Submittals.

1. RSN 35 22 18-1 Product Data:

Actuator sizing and gate move speed.

Motor data:

1) Locked-rotor torque: foot-pounds

2) Full-load torque: foot-pounds

3) Horsepower rating: horsepower

4) Voltage rating: volts

5) Locked-rotor current: amperes

6) Full-load current: amperes

Proposed wiring diagram of the actuator.

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RSN 35 22 18-2 Final data:

1. Service manuals, including wiring diagrams.

2. Assembly/Outline drawings including final parts list.

3. Lubrication, maintenance, calibration, and adjustment data.

4. Installation procedures: Submit manufacturer’s installation procedures.

5. As-built wiring diagram of control panel(s)

PART 2 PRODUCTS

GENERAL

Equipment Requirements:

1. The actuators for the slide gates, shall be suitable for use on a 208 Volt three phase 60 Hz power supply and shall include motor, integral reversing starters, local controls and Modbus protocol capability housed within a self-contained, sealed enclosure.

2. Size the motor with a safety margin for seating and unseating the gate with the supply voltage 10% below nominal.

3. Actuators must be capable of remote operation utilizing a signal from the Master SCADA which will be using Modbus protocol.

4. Actuators must be capable of transmitting gate position utilizing Modbus protocol.

5. Controls to allow Local/Stop/Remote operations and the ability Open/Close using switches on the actuator, when in the Local position.

6. Actuators must attach to existing 5’ x 5’ rising stem slide gates, that are currently operated using Joyce/Dayton machine screw jack model WJT65I 84 T1

SPS/SW/ST, HC.

Actuator sizing:

1. The actuator shall be sized to guarantee operation at the specified torque and/or thrust requirement of the installed gates.

2. The operating speed shall be a minimum of 4 inches per minute and not greater than 9 inches per minute.

Environmental:

1. Actuators shall be suitable for outdoor use. The actuator shall be capable of functioning in an ambient temperature ranging from -4°F to +122°F in open/close service.

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Enclosures:

1. Actuators shall be O-ring sealed, watertight to NEMA 6 (6 feet for 30 minutes).

2. All external fasteners shall be of stainless steel.

Motor:

1. The electric motors shall be Class F insulated, with a duty rating of at least 15 minutes, or one full gate open-close movement, whichever is greater, at 104°F (40°C).

2. Motor removal shall be possible without loss of lubricant.

3. Maximum of 15 starts per hour.

4. The following criteria shall be provided for motor protection:

The motor shall be de-energized without damage in the event of a stall condition when attempting to move a jammed gate.

The motor shall be de-energized in the event of an over torque condition.

Thermal devices imbedded in the motor windings shall be provided to de-energize the motor in case of overheating.

Gearing

1. The actuator gearing shall be totally enclosed in a gear case suitable for operation in any orientation.

2. Actuator gearing shall be hardened steel with alloy bronze worm wheel.

3. The design should permit the opening of the gear case for inspection or disassembly without releasing the stem thrust or taking the gate out of service.

4. Where required per application, electric actuators will be provided with worm gearboxes.

5. The worm gearboxes shall be supplied with full 360° bronze worm wheels and end-of-travel mechanical stops on the worm shaft.

6. Designs with segmented worm gears and end-of-travel stops in the gearbox housing will not be permitted.

Manual operation of gates:

1. Manual operation shall be by a handwheel.

2. Handwheel shall be mechanically independent of the motor drive for emergency operation.

3. There shall be a shaft extension to permit gate operation with a portable drill.

4. Clockwise operation of the handwheel shall cause the gates close.

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5. Return from manual to electric mode of operation will be automatic upon motor operation.

6. A seized or inoperable motor shall not prevent manual operation.

7. The hand wheel drive must be mechanically independent of the motor drive and any hand wheel gearing should be such as to permit emergency manual operation in a reasonable time.

8. Maximum rim pull for gate travel shall not exceed 60 pounds.

9. Operation of the handwheel shall not alter the gate position calibration.

Drive nut and thrust base assembly:

1. Slide gates and slotted baffles:

The drive nut shall be installed in a detachable thrust base.

The design shall allow actuator removal from the thrust base, leaving the thrust base attached to the gate to retain gate position.

Thrust bearings shall be lubricated by means of an easily accessible grease fitting.

The drive nut shall interface with the existing 1-1/2” gate stem with 0.375 pitch, Stub ACME threads.

Gate position and torque calibration:

1. Limit switches shall be furnished at each end of travel.

2. Limit switch adjustment shall not be altered by manual operation.

3. Adjustable to operate at any gate opening. Connect limit switches to associated starters so that motor will stop when gate has reached fully open or closed position.

4. One set of normally open and one set of normally closed contacts will be furnished at each end of travel where indicated.

5. Contacts shall be capable of reliably switching low voltage DC source from the control system furnished by others.

6. Mechanically operated torque switches shall be furnished at each end of travel.

7. Torque switches will trip when the actuator load exceeds the torque switch setting.

8. The torque switch adjustment device must be calibrated directly in engineering units of torque.

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Wiring and terminals:

1. Internal wiring shall be tropical grade insulated stranded cable of appropriate size for the control and single-phase power.

2. All external wiring shall terminate in a removable plug and socket head, which allows easy disconnection of all power and control voltages.

3. Actuators furnished without plug and socket terminal connections must have power and control disconnect switches for ease of maintenance and safety.

ELECTRIC ACTUATOR MANUFACTURERS:

Electrical actuator shall be manufactured by:

1. Rotork Controls, 675 Mile Crossing Blvd. Rochester, NY, www.rotork.com.

2. Or other manufacturer approved by COR.

PART 3 EXECUTION

INSTALLATION

Install gate actuators in accordance with manufacturers approved installation instructions.

ELECTRIC ACTUATOR COMMISSIONING AND TEST REPORTS

Commissioning:

1. Commissioning shall include calibrating the actuator as recommended by the manufacturer.

2. The calibration shall also include setting the open and closed limit switches and setting and verifying torque settings.

3. If the limit switch is an integral part of the gate actuator, test the limit switch as following:

When the gate is in the fully raised position, defined as the vertical height equivalent to the height of the gate.

When the gate is in the fully lowered position with the gate weight resting completely on the bottom seal.

4. Ensure functionality of actuators with master SCADA system.

http://www.rotork.com/

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Performance Test Documentation

1. Each actuator shall be performance tested in presence of COR.

2. Test documentation must be provided indicating the following:

Torque sensing tripping points in both the open and closed directions of travel

Current at the maximum torque tripping point Actuator output speed Position sensor reading with gate fully closed Position sensor reading with gate fully open Actual gate travel distance from fully open to closed position

END OF SECTION