Install Instructions

INSTALLATION INSTRUCTIONS
62-2025EFS-03
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 heating, ventilating, and air conditioning (HVAC)
systems to provide two-position or modulating functions.
These valve assemblies can be ordered with or without
factory-mounted non-spring return, spring return direct-
coupled actuators (DCA), or MVN 3 Nm (27 lb-in) Control Ball
Valve actuator.
Application Notes
IMPORTANT
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 in modulating
applications.
Oversized valves can cause excessive cycling and
the seat and ball can be damaged because of the
restricted opening.
Proper Use
These valves are only for use in cold, warm, and hot water
systems. Not suitable for oil, combustible gases, or steam.
They are designed for a medium temperature range of from 35
to 250°F, at a maximum pressure of 360 psig VBN valves are
to be operated with the appropriate Honeywell direct coupled
actuators only.
Water should be properly filtered, treated and conditioned
according to local conditions and the recommendations of the
boiler or chiller manufacturers. The installation of a 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:
• an equal percentage flow characteristic with characterized
flow control insert.
The VBN3 Three-Way Ball Valves have:
• between ports A and AB: an equal percentage flow
characteristic.
• between ports B and AB: a linear flow characteristic.
Required Operating Torque
Both Honeywell non-spring return and spring return 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. A 35 lb-in. DCA
provides sufficient torque to close the valve at rated close-off.
(See Table 1.) These ratings exceed most HVAC application
requirements.
Table 1. Close-off, Differential Pressure Ratings.
Valve
Type Valve Size (in.)
Close-off Pressure
Rating (psi)
2 way 1/2, 3/4 130
1, 1-1/4, 1-1/2, 2,
2-1/2, 3
100
3 way 1/2, 3/4, 1 50
1-1/4, 1-1/2, 2, 2-1/2 40