Johnson Controls V43 Series Manual

FANs 125, 121
Product/Technical Bulletin V43
Issue Date 0996
© 1996 Johnson Controls, Inc. 1
Part No. 24-7664-699, Rev. —
Code No. LIT-125683
The V43 Pressure Actuated Water Regulating Valves
are designed to regulate water flow for water-cooled
refrigeration condensers requiring a large flow capacity
(100 to 1000 gallons per minute). These pilot operated
valves open on pressure increase and provide
modulating operation.
Figure 1: V43 Pressure Actuated
Water Regulating Valve
V43 Pressure Actuated Water Regulating Valve
Features and Benefits
❑Built-in Pilot Valve Allows for more precise throttling
❑Easy Adjustment May be serviced and adjusted without breaking
line connections
❑Drain Plug Allows water to be drained during shutdown to
reduce the possibility of freeze-up
❑Mesh Monel Screen Protects pilot valve from dirt, scale, etc. and is
easily removed for cleaning and servicing without
breaking any line connections

2 V43 Pressure Actuated Water Regulating Valve Product/Technical Bulletin
A
pplication Overview
The V43 water regulating valves are pilot operated,
provide for modulating operation, and are available for
commercial and maritime applications. They are
typically used to regulate water flow for condensers
requiring a large flow capacity. The V43 valves
automatically open when the refrigerant pressure
increases and modulate the flow of cooling water
through the condenser (based on refrigeration
pressure).
V43 valves are available for non-corrosive refrigerants
such as R-22, R-12, R-134A, R-404A, R-502, R-507,
etc. Specially designed V43 valves are also available
for ammonia service.
Commercial V43 valves are constructed with a cast
iron body and brass internal parts. The seat material is
bronze.
In order to resist the corrosive action of sea water, the
V43 maritime and navy models are constructed with a
red brass body, bronze and monel interior parts, and
monel seat material.
IMPORTANT: All V43 water regulating valves
are designed for use only as
operating devices. Where valve
failure can result in personal
injury and/or loss of property, it is
the responsibility of the installer
to add devices (pressure relief or
safety shutoff valves) or systems
(alarm, supervisory) that protect
against or warn of device failure.
O
peration Description
The V43 valves are self-contained units, requiring only
the inlet and outlet water line connections and the head
pressure connection at the top of the bellows.
A built-in pilot valve, driven by refrigeration pressure,
operates the main valve with water.
The main valve seat disc assembly is suspended on a
heavy duty rubber diaphragm, eliminating all
closely-fitted and sliding parts. This reduces friction
within the valve, allows for more precise control, and
reduces the chances of the valve stem sticking (to an
O-Ring or other sealing components) in dirty water
conditions.
D
etermining Valve Size
To select the correct valve size, first complete
Steps 1 through 3. These steps will determine the
following variables:
•Maximum Water Flow Required
•Refrigerant Head Pressure Rise Above the
Valve Opening Point
•Water Pressure Available (WPA)
As instructed in Step 4, use these three variables to
locate a point on one of the flow capacity charts
(Figure 4) which slightly exceeds the maximum water
flow required. The flow capacity chart containing this
point represents the proper valve size.
Step 1: Determine the Maximum Water
Flow Required.
Use the table provided by the manufacturer of the
condensing unit to determine the maximum water
flow required. If this information is not available,
calculate the maximum water flow required by
using the following formula:
Maximum Water
Flow Required
(GPM)
=Tons of Refrigeration x 30
Outlet Temperature - Inlet Temperature
Note: If the outlet water temperature is not
known, assume it to be 10F°below the
condensing temperature.
Example: If a 100 ton capacity system has an inlet
water temperature of 85°F and an outlet water
temperature of 95°F, the maximum water flow
required is:
Maximum Water
Flow Required =100 x 30
95 - 85
Maximum Water
Flow Required =300 GPM

V43 Pressure Actuated Water Regulating Valve Product/Technical Bulletin 3
Step 2: Determine the Refrigerant Head
Pressure Rise Above the Valve Opening
Point.
The refrigerant head pressure rise above the valve
opening point
is the valve’s throttling range. This
cannot be adjusted and must be determined by
sizing the valve properly. Use the following
formula to calculate the refrigerant head pressure
rise above the valve opening point:
Refrigerant
Head
Pressure
Rise
=
Refrigerant
Pressure at
the Desired
Condensing
Temperature
_ (Valve Closing Point
+ 7 psig)
The valve closing point (to assure closure under all
conditions) must be the refrigerant pressure
equivalent to the highest ambient air temperature
that the equipment will be subjected to in the off
cycle. Determine this variable in psig from a
saturated vapor table for the refrigerant selected.
From the saturated vapor table, find the
refrigerant
pressure at the desired condensing temperature
corresponding to the system condensing
temperature at the outlet side of condenser.
Step 3: Determine the Water Pressure
Available (WPA).
Use the following formula to calculate the water
pressure available
. WPA is the water pressure
available to force water through the valve.
WPA =Supply
Pressure* _(Pressure Drop through
Condenser + Estimated Drop
through all Piping to and from V43)
* Supply pressure is the supply water pressure from
a cooling tower, the pump on a system, or from a
city water main.
Step 4: Select the Proper Valve Size.
A properly sized valve meets the requirements of
the maximum water flow required, refrigerant head
pressure rise above the valve opening point, and
the water pressure available. These variables are
represented on a flow capacity chart (Figure 4).
Select the correct flow capacity chart (representing
the proper valve size) by performing the following:
a. On the flow capacity chart (Figure 2) locate
Point A, at the intersection of the following:
•the refrigerant head pressure rise above
the valve opening point (as determined in
Step 2) on the Y axis and
•the WPA curve representing the water
pressure available (resulting from the WPA
value determined in Step 3). If the actual
WPA curve is not represented on the
chart, draw a new curve (parallel to the
existing WPA curve of the nearest value).
b. Draw a line from Point A (determined in
Step a) down to the
Maximum Water Flow
Required
axis (Point B, Figure 2). This point
represents the
maximum water flow available .
c. The
maximum water flow available value
(Point B) must be slightly greater than the
maximum water flow required value
(Point C) determined in Step 1. The flow
capacity chart meeting this requirement
represents the proper valve size.
d. After determining the correct valve size, select
the correct valve model from Table 3 and, if
applicable, an optional flange and gasket kit.
Figure 2: Selecting the Proper Valve Size

4 V43 Pressure Actuated Water Regulating Valve Product/Technical Bulletin
Example:
In this example, the required flow for a R-22
system is 300 GPM. The desired system
condensing temperature is 105°F. The refrigerant
pressure at the outlet side of condenser is
211 psig. The maximum ambient temperature the
equipment will be subjected to in the off cycle is
estimated at 91°F. The city water pressure is
40 psig and the condenser manufacturer’s table
gives a pressure drop through the condenser,
accompanying piping, and valves of 15 psi. The
pressure drop through the installed piping is
approximately 4 psi.
Step 1:
Maximum Water
Flow Required
= 300 GPM
Step 2: Valve closing point is the pressure of the
refrigerant (R-22) corresponding to
the maximum ambient temperature of
91°F = 171 psig.
Valve Closing Point = 171 psig
Refrigerant (R22) Pressure at
Desired Condensing
Temperature (105°F) = 211 psig
Refrigerant Head
Pressure Rise
= 211 - (171 + 7)
Refrigerant Head
Pressure Rise
= 33 psig
Step 3:
Water Pressure
Available
= 40 - (15 + 4)
Water Pressure
Available
= 21 psi
Step 4: Select Proper Valve Size
Plot the variables listed above--first on a
chart representing a small size valve,
then continue to larger valves. The flow
capacity chart represents the proper
valve size if the
maximum water flow
available
value (Point B) is slightly greater
than the
maximum water flow required
value (Point C).
Result: As indicated in Figure 3, the
correct valve size for this application is
3 in. The maximum water flow available
for the 3 in. valve is slightly greater than
the maximum water flow required
(300 GPM) . Select valve type from
Table 3.
Figure 3: Example, Flow Capacity Chart

V43 Pressure Actuated Water Regulating Valve Product/Technical Bulletin 5
Figure 4: V43 Flow Capacity Charts

6 V43 Pressure Actuated Water Regulating Valve Product/Technical Bulletin
Figure 5: Dimensions
Table 1: Dimensions
Reference
Letter 2 in. Valve in. (mm) 2-1/2 in. Valve in. (mm) 3 in. Valve in. (mm) 4 in. Valve in. (mm)
A9-1/2 (241) 10-3/4 (273) 11-3/4 (298) 14 (356)
B7-1/2 (191) 8 (203) 9 (229) 10-3/4 (273)
C4-3/4 (121) 5-1/2 (140) 6 (152) 7-1/2 (191)
D6 (152) 7 (178) 7-1/2 (191) 9 (229)
E2-1/8 (54) 2-5/8 (67) 3-1/8 (80) 4-1/8 (105)
F15-1/4 (387) 15-9/16 (395) 16-9/16 (421) 18-1/5 (462)
G3/4 (19) 3/4 (19) 3/4 (19) 3/4 (19)
H3-5/8 (92) 3-15/16 (100) 4-1/4 (108) 5 (127)

V43 Pressure Actuated Water Regulating Valve Product/Technical Bulletin 7
I
nstallation and Initial Adjustment
Note: If available, follow the mounting instructions of
the equipment onto which the V43 will be
installed. For new installation, a companion
flange and gasket kit (refer to Table 3) is
required to mount the V43 to the water lines.
1. Flush the lines to remove any foreign matter before
connecting the lines to the valve. Refer to the
Servicing section.
2. Screw each companion flange and gasket onto the
inlet and outlet water lines as indicated in Figure 6.
The inside of the companion flange is threaded.
(Refer to Table 3 for flange and gasket kit
information.)
3. Mount the V43 so that the water flow follows in
the direction indicated by the arrow on the
V43 casting.
The V43 is not position sensitive for operation.
However, if the V43 is to be drained during
shutdown, mount the V43 onto a horizontal water
line, with the bellows up.
4. Secure the inlet and outlet water lines (with
companion flange and gasket) to the inlet and
outlet flange connections on the V43 with a hex
bolt and nut.
Figure 6: V43, Gasket, and Flange Connections
(V43AV Shown)
5. Connect a 1/4 in. copper (or Ecosafe) tube from
the bellows of the V43 to the refrigerant line as
indicated in Figure 7. If possible, make the
connection on the inlet side of the condenser.
6. Manually flush the valve to remove debris.
(Refer to
Servicing section.)
7. Put the system into operation under normal
operating conditions.
8. Determine the correct refrigerant operating head
pressure for the system. Observe the refrigerant
pressure indicated at the high side pressure
service gauge.
9. If necessary, adjust the operating head pressure
as instructed in the
Valve Adjustment section.
Figure 7: V43 Connections and Adjustments
(V43AV Shown)
C
heckout Procedure
Note: Before operating equipment, always manually
flush the valve. Refer to the
Servicing section.
Before leaving the installation site, observe at least
three complete operating cycles (bellows open and
close) to verify that all components are functioning
properly. The V43 should be regulating the water flow
at the correct pressure. To adjust the operating head
pressure and water flow, refer to the
Valve Adjustment
section.

8 V43 Pressure Actuated Water Regulating Valve Product/Technical Bulletin
V
alve Adjustment
Make adjustments gradually. Adjust by 1/2
revolution and wait for the system to stabilize after
each adjustment change. The differential is not
adjustable.
•To increase the operating head pressure
and decrease the water flow: Turn the
adjusting screw (Figure 8, inset) down, toward
main valve body (clockwise when viewed from
the top).
•To decrease the operating head pressure
and increase the water flow: Turn the
adjusting screw up, away from main valve
body (counter-clockwise).
S
ervicing
The V43 valve can be disassembled, cleaned, and
reassembled without breaking the line connections.
To Access Internal Parts
1. Shut off water flow to the V43.
2. Remove the hex bolts (Figure 8) from the top
of the bellows flange.
3. Remove the bellows flange.
Note: For internal parts replacement instructions,
refer to the respective replacement parts
instruction sheet.
Manual Flushing
Before starting equipment, manually flush the
valve to remove any foreign material from the
valve. Flushing before operation will prolong
equipment life and enhance valve performance.
1. Turn the adjusting screw (Figure 8, inset)
counterclockwise (when viewed from top),
raising the adjusting screw as far up as
possible.
2. Insert a standard screwdriver tip between the
adjusting screw and the push pin.
3. Pry the push pin down with the screwdriver to
open the valve as indicated.
4. Hold the push pin down to hold the valve open.
Flush the valve for several minutes, removing
all foreign matter from the V43.
5. After flushing the V43, remove the screwdriver
and set the adjusting screw to the desired
operating pressure. (Refer to the
Valve
Adjustment
section.)
Cleaning the Monel Screen
The pilot valve is protected from dirt, scales, etc.
by a fine mesh monel screen. To clean the
screen, shut off flow, unscrew hex bolt (Figure 8),
remove monel screen, brush, and rinse clean.
Draining the V43 During Shutdown
To reduce the possibility of freeze-up, drain the
V43 during shutdown. To drain, unscrew the drain
plug at the base of the V43. Refer to Figure 8.
Note: In order to drain, the V43 must be
mounted in a horizontal water line with the
bellows up and the drain plug down.
Figure 8: Monel Screen, Drain Plug,
and Manual Flushing Procedures
(V43AV Shown)

V43 Pressure Actuated Water Regulating Valve Product/Technical Bulletin 9
R
epairs and Replacement
The sensing element, internal parts, and rubber
diaphragms are replaceable. Refer to the
Servicing
section for instructions. To obtain replacement parts,
contact the nearest Johnson Controls distributor.
Replacement parts are listed in
V43 Series Repair
Parts Kits
(LIT-121690).
O
rdering Information
When ordering the V43, specify the following:
1. Product number (Refer to Tables 2 and 3.)
2. Optional companion flange and gasket kit
For new installation of commercial valves, a
companion flange and gasket kit is required to
mount the water lines to the V43. Refer to Table 4
for kit ordering information.
Table 2: Type Number Selection Matrix
V43 A Commercial service with iron body, open on
pressure increase
BMaritime service with brass body, open on
pressure increase
CNavy service with brass body, open on
pressure increase
S2 in. flange
T2-1/2 in. flange
V3 in. flange
W4 in. flange
Table 3: Product Number
Valve Size
and
Pipe Connection
R-12, R-134A
70 to 150 psig
(483 to 1034 kPa)
Low Pressure
Opening Point Range
R-22, R404A, R502, R-507
160 to 260 psig
(1103 to 1793 kPa)
High Pressure
Opening Point Range
Ammonia (R-717)
160 to 260 psig
(1103 to 1793 kPa)
High Pressure
Opening Point Range
Commercial Service
2 in. IPS Flanged V43AS-1 V43AS-2 V43AS-5
2-1/2 in. IPS Flanged V43AT-1 V43AT-2 V43AT-5
3 in. IPS Flanged V43AV-1 V43AV-2 V43AV-5
4 in. IPS Flanged V43AW-1 V43AW-2 V43AW-5
Maritime Service
2 in. IPS Flanged V43BS-1 V43BS-2 --
2-1/2 in. IPS Flanged V43BT-1 V43BT-2 --
3 in. IPS Flanged V43BV-1 V43BV-2 --
4 in. IPS Flanged V43BW-1 V43BW-2 --
Navy Service
2 in. IPS Flanged V43CS-1 V43CS-7 --
2-1/2 in. IPS Flanged V43CT-1 V43CT-3 --
3 in. IPS Flanged V43CV-2 V43CV-4 --

10 V43 Pressure Actuated Water Regulating Valve Product/Technical Bulletin
Table 4: Optional Flange and Gasket Kits*
Kit
Number Water Valve Size Shipping Weight lb. (kg)
KIT14A-613 2 in. 11.8 (5.4)
KIT14A-614 2-1/2 in. 16.5 (7.5)
FLG15A-600 3 in. 20 (9.1)
FLG15A-601 4 in. 34 (15.4)
*A companion flange and gasket kit is required to
mount the water lines to commercial type V43 water
regulating valves. Figure 9: Flange and Gasket Kit