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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 13.33 Control Valves
Control Ball Valves and Actuators
Mounting and Wiring
1. Valves shall be cast iron with ANSI/ASME 125 flange fittings from 4 to 6 inches (DN100 to DN150).
2. Valves shall provide equal percentage flow control characteristics. Valve ball and stem construction shall be stainless steel.
3. Valve shall have a blow-out proof stem.
4. Three-way valves shall be used for mixing control and provide A-B-AB port orientations in a "T" pattern with side B port. The Bypass port
shall provide 20% reduced Cv rating using a linear flow characteristic to approach constant flow through branch circuits.
5. Threaded valve bodies shall have maximum static pressure rating of 240 psig (1650 kPa) at 250°F (120 C).
6. Actuators shall be direct coupled rotary type requiring neither crank-arm nor linkage and direct mount to the valve actuator bracket. The
bracket shall provide for up to 2 inches (50 mm) of pipe insulation.
7. Actuators shall provide internal wiring terminal connections with threaded holes for flexible conduit strain relief fittings where mechanical
protection is required by local codes.
8. Valve actuator shall be capable of operating on 24 Vac Class II power, or be UL Recognized or CSA Certified to U.S. and Canadian
Standards for use with line voltage.
Control
1. The actuator shall provide two-position, floating, or modulating control. Modulating control refers to direct acceptance of 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 of non-fail safe actuators shall be in the form of 24 Vac
power controlled by SPDT switch. Two-position control of fail safe actuators shall be in the form of 24 Vac power controlled by SPST
switch.
2. Flanged control ball valves shall have minimum 100:1 rangeability with an equal percentage flow characteristic provided by a laser-milled
stainless steel ball.
3. Multiple Cv ratings will be available in each valve size.
4. Modulating control models provide a 2-10 Vdc feedback signal.
5. Proportional actuators shall have a rotation direction control switch accessible on the cover to change between proportional or floating
control.
6. Actuators shall have SPST or SPDT switch for position verification feedback as an available option.
7. Actuation will be available with fail-safe operation.
Other
1. Valve stems must be field serviceable.
2. Valves may not be installed with stems below the horizontal plane to prevent actuator damage due to stem seal leakage, or accumulation
of particulate in the stem packing.
3. A water filtration and treatment system shall be installed and operated according to the requirements of Division 23 25 13, Water
Treatment for Closed-Loop Hydronic Systems. The presence of excess rust in the system will void the manufacturer's warranty.
4. Actuated valves shall be capable of closing off against their maximum operating differential pressure. Seat leakage of the A port when
closed shall be ANSI/ASME Class IV, 0.01% maximum.
5. All spring return actuators must be designed for either normally open or normally closed 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.
6. All 10 and 20 Nm spring return actuators must be able to spring return from -40°F to 189°F
7. 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.
8. Run time shall be constant and independent of: load, temperature, and supply voltage (within specifications).
9. All valves and actuators shall be manufactured under ISO 9001 International Quality Control Standards.
10. Actuators shall have a five year warranty.
11. Valves and actuators shall be as manufactured by Honeywell.
Guide Specifications
Control Ball Valves and Actuators