Install Instructions

INSTALLATION INSTRUCTIONS
62-2025EFS-06
VBN Threaded Control Ball Valves
and Actuators
APPLICATION
The VBN2 Two-Way and the VBN3 Three-Way Control Ball
Valves control hot and chilled water with glycol solutions
up to 50% in closed loop heating, ventilating, and air
conditioning (HVAC) systems to provide two-position or
modulating functions. Not for use in open loop systems.
These valve assemblies can be ordered with or without
factory-mounted actuators.
Application Notes
Valve sizing is important for correct system operation.
Undersized valves do not have sufficient capacity at
maximum load. Oversized valves do not have sufficient
authority over the load.
Oversized valves can cause excessive cycling leading to
premature actuator failure, and the seat and ball can be
damaged because of the restricted opening.
Proper Use
VBN valves are intended for use in chilled water and hot
water closed loop applications only, with a temperature
range of 35 to 250°F, and pressures up to 360psig.
Water should be properly filtered, treated and conditioned
for good operating performance, and according to
recommendations of the boiler or chiller manufacturers.
The installation of strainers and filters is recommended.
IMPORTANT
The presence of excessive iron oxide (red rust) in
the system voids the valve warranty.
Effective C
V
When valves are mounted between pipe reducers, there is
a decrease in actual valve capacity because the reducers
create additional pressure losses in the system. This is
especially true for ball valves because of their high
capacity.
For effective C
V
s for Honeywell control ball valves when
used with pipe reducers, refer to the Product Data sheet
form no. 62-2648.
Flow Characteristics
The VBN2 Two-Way Ball Valves have:
• equal percentage flow characteristic with characterized
flow control insert.
The VBN3 Three-Way Ball Valves have:
• between ports A and AB: equal percentage flow
characteristic.
• between ports B and AB: linear flow characteristic at
approximately 80% of the nominal Cv rating.
Required Operating Torque
Both Honeywell fail in place and fail-safe low torque direct
coupled actuators can be utilized with the VBN2 and VBN3
valves. VBN valves use a patented seat design that
reduces the torque needed from the actuator.
Actuators with 27 lb-in torque, (for valves up to 1-1/4 in
size), and 35 lb-in torque (for 1-1/2 in size and above)
provide sufficient torque to operate the valve at rated
close-off. (See Table 1.)