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GUIDE SPECIFICATIONS
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
Threaded Control Ball Valves and Actuators
Mounting and Wiring
1. Valves shall be forged brass with female national pipe thread pipe fittings from ½ to 2 ½ inches (DN15 to DN65), and 3 inches (DN80) in
two-way.
2. Valves shall provide modified equal percentage, or equal percentage flow control characteristics.
3. Valve ball and stem construction shall be nickel-plated brass. Stainless steel trim shall be optional on 2-way valves.
4. Valve shall have a blow-out proof stem with Teflon® trust bearings, EPDM O-ring, and silicon grease to prevent leakage.
5. Three-way valves shall be used for mixing or diverting control and provide A-B-AB port orientations in a "T" pattern with bottom B port.
The Bypass port shall provide 20% reduced Cv rating using a linear flow characteristic to approximate constant flow through branch
circuits.
6. Threaded valve bodies shall have maximum static pressure rating of 360 psig (2500 kPa) at 250°F (120 C).
7. 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.
8. Actuators shall provide internal wiring terminal connections with threaded holes for flexible conduit strain relief fittings where mechanical
protection is required by local codes.
9. Valve actuator shall be capable of operating on 24 Vac Class II power (Safety Extra-Low Voltage), 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. Threaded control ball valves shall have minimum 50:1 rangeability with an equal percentage flow characteristic provided using a laser-cut
flow control insert within the ball. The insert shall not make contact with valve seals and seats.
3. Multiple Cv ratings will be available in each valve size.
4. Modulating control models shall provide a 2-10 Vdc feedback signal.
5. Modulating actuators shall have a rotation direction control switch accessible on the cover to change between modulating 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 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
Threaded Control Ball Valves and Actuators