V246 Series Two-Way Pressure-Actuated Water-Regulating Valves
for High-Pressure Refrigerants
Description
The V246 Series Two-Way
Pressure-Actuated Water-Regulating Valves
for High-Pressure Refrigerants come in two
types of control action: direct acting and
reverse acting. V246 valves regulate water
flow to control refrigerant head pressure in
systems with water-cooled condensers.
The V246 Series Valves are available in 3/8 in.
through 2 in. sizes and have a maximum
allowable water pressure of 150 psig
(10.3 bar). Direct acting V246 valves have an
adjustable opening point in a refrigerant
pressure range of 200 to 400 psi
(13.8 to 27.6 bar), and reverse acting valves
have a range of 135 to 300 psi
(9.3 to 20.7 bar). V246 valves
may be used
with standard non-corrosive refrigerants.
Maritime models, which have nickel copper
(Monel®) internal parts, are available for
applications where the media may be
corrosive to the internal parts.
Selection Charts
North American Standard Production Models
Product Code Number ConstructionValve Size and ConnectionElement Style Shipping Weight,
Pressure-Actuated Water-Regulating Valves
for High-Pressure Refrigerants Product
Bulletin (LIT-12011514) for important product
application information.
Features
• no close fitting or sliding parts in water
passages
• accessible range spring
• take-apart construction
• pressure-balanced design
• corrosion-resistant material for internal
parts
Repair Information
If the V246 Series Two-Way
Pressure-Actuated Water-Regulating Valve
for High Pressure Refrigerants fails to operate
within its specifications, refer to the V246
Series Two-Way Pressure-Actuated
Water-Regulating Valves for High Pressure
Refrigerants Product Bulletin (LIT-12011514)
for a list of repair parts available.
lb (kg)
3/8 in. NPT ScrewStyle 5 1.8 (0.8)
3/8 in. NPT ScrewStyle 51.8 (0.8)
2
, Commercial
2
, Commercial1/2 in. NPT ScrewStyle 5 3.0 (1.4)
2
, Commercial3/4 in. NPT ScrewStyle 5 3.7 (1.7)
2
, Commercial1 in. NPT ScrewStyle 5 9.3 (4.2)
3/8 in. NPT ScrewStyle 51.8 (0.8)
kg (lb)
R-171
Flow Required
Flow =
(Temp. - Temp.)
OutletInlet
FIG:flw_e qn
Valve Opening Pressure
FIG:eqn_
opn_prs
P = P +10 psi (0.7 bar)
OPENCLOSE
Refrigerant Head Pressure Rise
FIG
P = P - P
Available Water Pressure
Cooling Tower
P
1
P
2
P
Loss 2
2-Way
Valve
P
IN
COND
P
P
1P2
=
-
P
P
P
=
+
+ ...
FIG:2wy_prs s_dr
Valves and Valve Accessories
V246 Series Two-Way Pressure-Actuated Water-Regulating Valves for
High-Pressure Refrigerants (Continued)
European Standard Production Models (Part 2 of 2)
Product Code NumberConstructionValve Size and ConnectionElement Style Shipping Weight,
kg (lb)
V246GR1B001CDirect Acting, Commercial1-1/2 in. Flange, DIN2533Style 56.2 (13.6)
V246GS1B001CDirect Acting, Commercial2 in. Flange, DIN2533Style 512.3 (27)
V246HA1B001CDirect Acting, Maritime3/8 in. BSPP Screw, ISO228Style 50.8 (1.8)
V246HB1B001CDirect Acting, Maritime1/2 in. BSPP Screw, ISO228Style 51.4 (3.0)
V246HC1B001CDirect Acting, Maritime3/4 in. BSPP Screw, ISO228Style 52.0 (4.3)
V246HD1B001CDirect Acting, Maritime1 in. BSPP Screw, ISO 228Style 54.3 (9.5)
V246HE1B001CDirect Acting, Maritime1-1/4 in. BSPP Screw, ISO 228Style 54.7 (10.3)
V246HR1B001CDirect Acting, Maritime1-1/2 in. Flange, DIN86021Styl e 56.2 (13.6)
V246HS1B001CDirect Acting, Maritime2 in. Flange, DIN86021Style 512.3 (27)
Valve Sizing Information
.
Each application is unique and requires specific engineering data to
properly size and design a system to fulfill the appropriate
requirements. Typically, a valve is replaced with another valve of the
same size in a properly sized and engineered system. In North
America, contact Johnson Controls/PENN® Refrigeration Application
Engineering at 1-800-275-5676 to obtain specific engineering data. In
other areas, contact the local Johnson Controls® sales office to obtain
specific engineering data.
To make a rough field estimate of the size of valve for an application,
c. From the Pressure-Temperature Chart for the refrigerant
selected, read the Refrigerant Condensing Pressure (P
(operating head pressure) corresponding to the selected
condensing temperature.
d. Subtract the Valve Opening Pressure from the Refrigerant
Condensing Pressure. This gives the head pressure rise.
find the valve size needed by locating a point on a flow chart that
satisfies these requirements:
• water flow required by the condenser (Flow)
• refrigerant head pressure rise (P
• available water pressure (P
AVAIL
RISE
)
)
Follow these steps, and use the information obtained to locate a point
on one of the flowcharts that satisfies all three steps.
1. Take the water flow required by the condenser (Flow) from
information provided by the manufacturer of the condensing unit. If
the manufacturer’s information is unavailable, use the following
information to make a rough approximation of water flow in gallons
per minute (gpm) [cubic meters per hour (m
3
/hr)]:
• System Capacity (Tons of Refrigeration)
Inlet
Outlet
)
)
• Outlet Water Temperature (Temp.
• Inlet Water Temperature (Temp.
Calculate the flow using the following formula:
3. Determine the available water pressure to the valve (P
the following steps. This is the actual water pressure available to
force water through the valve.
a. Determine the inlet pressure (P
from city water mains, pumps, or other sources.
b. Pressure drop through condenser (P
water pressure between the condenser inlet and the condenser
outlet. Obtain this information from the condenser manufacturer.
c. Estimate or calculate the pressure drop through all associated
piping (P
d. Subtract the P
RISECONDOPEN
).
LOSS
COND
and P
:eqn_hd_prs sr_rs
). This is the water pressure
IN
) is the difference in
COND
from PIN. The result is P
LOSS
p
AVAIL
Tons of Refrigeration x 30
Pump
COND
) using
AVAIL
)
.
Note: If the outlet temperature is unknown, assume it to be 10F
(6C) above the inlet temperature.
2. Determine refrigerant head pressure rise above the valve opening
point (P
the following steps:
) using the Refrigerant Head Pressure Rise figure and
RISE
a. The Valve Closing Pressure (P
refrigerant pressure at the highest ambient temperature the
refrigeration equipment experiences in the Off cycle. Use a
Pressure-Temperature Chart for the refrigerant selected to find
this pressure.
b. To approximate the Valve Opening Pressure (P
about 10 psi (0.7 bar) to the Valve Closing Pressure.
Note: Add about 20 psi (1.4 bar) for 3/8 in. valves.
4. Select the proper valve size from the flowcharts by locating a point
on a chart that satisfies the flow, the head pressure rise above
opening point, and the pressure drop across the valve.
Metric Conversions
Use these equations to convert between U.S. and S.I. units.
V246 Series Two-Way Pressure-Actuated Water-Regulating Valves for
High-Pressure Refrigerants (Continued)
V246 Flange Valve, Commercial Service - Dimensions
Valve
Size
1-1/2 in.5-5/16
2 in.6-5/8
1. The dimensions on the European versions are 5-29/32 in. (150 mm).
2. The dimensions on the European versions are 6-1/2 in. (165 mm).
ABCDEFGH
(135)
(168)
9/16
(14)
5/8
(16)
V246 Flange Valve, Commercial Service - Flange Specifications
Valve SizeRegional VersionNumber of HolesHole SizeBolt Circle
1-1/2 in.North American45/8 in. (16 mm)3-7/8 in. (98 mm)
2 in.3/4 in. (19 mm)4-3/4 in. (121 mm)
1-1/2 in.European, DIN2533 Flanges418 mm110 mm
2 in.125 mm
V246 Flange Valve, Maritime Service - Dimensions
Valve
Size
1-1/2 in.5-5/16
2 in.6-3/8
1. The dimensions on the European versions are 5-29/32 in. (150 mm).
2. The dimensions on the European versions are 6-1/2 in. (165 mm).
ABCDEFGH
(135)
(162)
9/16
(14)
5/8
(16)
6-1/8
(156)
7-1/8
(181)
V246 Flange Valve, Maritime Service - Flange Specifications
Valve SizeRegional VersionNumber of HolesHole SizeBolt Circle
1-1/2 in.North American45/8 in. (16 mm)3-7/8 in. (98 mm)
2 in.3/4 in. (19 mm)4-3/4 in. (121 mm)
1-1/2 in.European, DIN86021 Flanges418 mm110 mm
2 in.125 mm
Cup300 Series stainle ss st eel300 Series stainless steel300 Series stainless steel
Bellows300 Series stainless steel300 Series st ainless steel300 Series stainless steel
Bellows RingSteel/nickel platedSteel/nickel platedSteel/nickel plated
(Commercial)
1 in. to 2 in.
(Commercial)
Maritime (All Sizes)
R-179
Valves and Valve Accessories
V246 Series Two-Way Pressure-Actuated Water-Regulating Valves for
High-Pressure Refrigerants (Continued)
Pressure Element Cup300 Series stainless steel300 Series stainless steel300 Series stainless steel
Bellows300 Series stainless steel300 Series stainless steel300 Series stainless steel
Bellows RingSteel/nickel platedSteel/nickel platedSteel/nickel plated
1 in. to 2 in.
(Commercial)
Maritime (All sizes)
Technical Specifications
Factory-Set Opening PointDirect Acting 200 psig (13.8 bar), Reverse Acting 165 psig (11.4 bar)
Maximum Working Pressure630 psig (43.4 bar)
Opening Point Adjustment RangeDirect Acting 200 to 400 psi (13.8 to 27.6 bar), Reverse Acting 135 to 300 psi (9.3 to 20.7 bar)
Media150 psig (10.3 bar) Maximum,
V246 Series 2-Way Pressure-Actuated Water-Regulating Valves for High-Pressure Refrigerants
-4F to 170F (-20C to 77C) glycol/water or liquids with low freezing points that are compatible with valve materials