Johnson Controls V43 Series Manual

FANs 125, 121

Product/Technical Bulletin V43

Issue Date 0996

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

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.

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.

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

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)

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

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).

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

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).

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

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