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The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc. www.johnsoncontrols.com
R-167
V148 Series Three-Way Pressure-Actuated Water-Regulating Valves
(Continued)
Valves and Valve Accessories
Calculate the flow using the following formula:
Note: If the outlet temperature is unknown, assume it to be 10F
(5.6C) above the inlet temperature.
2. Determine refrigerant head pressure rise above the valve opening
point (P
RISE
) using the following steps:
a. The Valve Closing Pressure (P
CLOSE
) is equal to the
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
OPEN
), add
about 7 psi (0.5 bar) for EK and AL models or 10 psi (0.7 bar) for
GK1 and GL1 models to the Valve Closing Pressure.
Flow =
Tons of Refrigeration x 30
(Temp. - Temp. )
Outlet Inlet
FIG:flw_eqn
Flow Required
Valve Dimensions, Inches (Millimeters)
Model Nominal
Valve Size
A B C D E F
V148EK-1C 3/4 in. 3-3/8 (86) 2-3/16 (56) 9 (229) 4-3/16 (106) 1-3/4 (44) 3 (76)
V148GK1-001C 3/4 in. 3-3/8 (86) 2-3/16 (56) 9-13/16 (249) 4-3/16 (106) 1-3/4 (44) 3-13/16 (97)
V148AL-1C 1 in. 4-3/4 (121) 2-3/4 (71) 12 (305) 5-15/16 (151) 2 (51) 4 (102)
V148GL1-001C 1 in. 4-3/4 (121) 2-3/4 (71) 12-1/2 (318) 5-15/16 (151) 2 (51) 4-1/2 (115)
1 in. High Refrigerant Pressure V148GL1 Valves
B
F
D
A
E
C
Port 1
Port 3
Plugged
Port 2
FIG:V148GL1_100_dim
Selection
To make a rough field estimate of the size of valve for an application,
find the valve size by locating a point on a flow chart that satisfies these
requirements:
• water flow required by the condenser (Flow)
• refrigerant head pressure rise (P
RISE
)
• available water pressure (P
AVAIL
)
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 maximum water flow
in gallons per minute (gpm) (cubic meters per hour [m
3
/hr]):
• System Capacity (Tons of Refrigeration)
• Outlet Water Temperature (Temp.
Outlet
)
• Inlet Water Temperature (Temp.
Inlet
)
B
F
D
A
E
C
Port 1
Port 3
Plugged
Port 2
FIG:V148GK1_075_dim
3/4 in. High Refrigerant Pressure V148GK1 Valves