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23 00 00 HEATING, VENTILATING, AND AIR-CONDITIONING (HVAC)
23 09 00 Instrumentation and Control for HVAC
23 09 13 Instrumentation and Control Devices for HVAC
23 09 13.13 Actuators and Operators
Tandem Direct-Coupled Rotary Actuator Globe Valve Linkage
Mounting and Wiring
1. Valve linkages shall be direct coupled type capable of adapting Honeywell direct-coupled rotary actuators for direct mounting to a
Honeywell globe valve from ½ to 3 inches in size (DN15 to DN80), or from 4 to 6 inches (DN100 to DN160).
2. Valve stem stroke will be ¾ or 1 ½ inches.
3. The linkage shall connect to the valve stem using a threaded jackshaft. The valve stem shall be prevented from spinning by use of a jam
nut to lock the valve stem to the jackshaft.
4. The linkage shall mount to the valve bonnet using a full collar.
5. The linkage shall accept one or two, spring or non-spring return actuators up to 300 lb-in (34 Nm) torque each, for maximum close-off.
6. The actuators shall connect to the linkage shaft using a removable output hub with a self centering shaft coupling if available or u-bolt
hub. This self centering shaft coupling shall provide concentric mounting and include an integral adjustable range-stop mechanism.
7. Actuators shall provide wiring terminals located within an integral access cover with conduit connections.
Control
1. The actuator–linkage combination shall provide two-position or floating, or proportional control. Proportional control refers to direct
acceptance of 0-10 Vdc, 2-10 Vdc or with addition of a 500 ohm resistor a 4-20 mA input signal. Floating control refers to direct
acceptance of 24 Vac pulse-width modulated open and close commands from a tri-state (SP3T) controller. Two-position control for non-
fail safe actuators shall be in the form of SPDT 24 Vac power controlled by SPDT switch.
1. Proportional control models provide a 2-10 Vdc feedback signal.
2. Proportional actuators shall have a rotation direction control switch accessible on the cover to change between proportional or floating
control.
Other
1. All spring return actuator-linkage combinations must be designed for either valve stem extend or retract fail-safe operation with a
continuously engaged mechanical return spring. This spring must return the actuator to a fail-safe position within 20-25 seconds of
power loss.
2. All spring return actuators must be able to spring return from -40 to 189°F (-40 to 87 C).
3. Valves controlling steam should be installed with the linkage beside the valve, not above it, with the actuator mounting yoke oriented to
maximize convective air flow for cooling.
4. All actuators shall be designed for a minimum of 60,000 full-stroke cycles at actuator rated torque and temperature, and 1,500,000
repositions.
5. Run time shall be constant and independent of: load, temperature, and supply voltage (within specifications).
6. All actuators shall be plenum-rated per UL873 and cUL (CSA22.2) listed, and be manufactured under ISO 9001 International Quality
Control Standards.
7. Actuators shall be as manufactured by Honeywell.
Guide Specifications
Tandem Direct-Coupled Rotary Actuator Globe Valve Linkage