INSTALLATION 
INSTRUCTIONS 
TYPES V437 AND V837 MAGNETIC WATER VALVES 
These valves are silent in operation and are equipped with 
easily replaceable seats and plungers. They are designed to 
operate against water pressures of 100 lbs. per square inch 
maximum, but are not recommended for automatic boiler feeder 
use, as a refrigerant flow control, or where the water tempera- 
ture will exceed 100° if liming is a factor. A liquid temperature 
of 160° is permissible where liming is not a factor. They are 
available in straight through patterns only. 
The V437A and V837A Magnetic Water Valves are designed 
for use, primarily, on domestic spray type humidifying systems. 
The two valves are similar in operation except that the V837A 
Valve operates on low voltage and is furnished with a transformer. 
TYPES— 
V437A Water Valve (Series 40). 
V837A Water Valve (Series 80). 
PATTERN -— Straight through, non-offset. 
CONDUIT OUTLET POSITION—(Adjustable) 
factory set with outlet on left hand side (when 
facing inlet end). 
VOLTAGE AND FREQUENCY—115 volts, 60 
cycle. 115 volts, 50 cycle at no extra cost. Other 
voltages and frequencies at extra cost. For D.C. 
specify V43A. 
VALVE SIZE— 3,”. 
SPECIFICATIONS 
PORT SIZE—%4”. 
MAXIMUM PRESSURE — 100 lbs. at 160° F. 
(75 lbs. for voltages and frequencies other than 
115 or 230 volt, 60 cycle). 
CAPACITY— 
Inlet Pressure 50# | 100# 
Capacity 
G. f 
ey 1.4 | 1.8 
DIMENSIONS — Face to face, 23g”, center line 
of pipe to top 31%”. 
SPECIAL FEATURE AVAILABLE (at extra 
cost)—Type V437A available with conduit out- 
let factory set on right hand side (when facing 
valve inlet). (It should be noted that the conduit 
outlet position may be changed in the field on 
all models). 
WHEN ORDERING SPECIFY: 
1. Type Number. 
2. Voltage and frequency. 
3. Left or right hand conduit connection (for 
Type V437A). 
INSTALLATION 
A suitable strainer should be installed ahead of the valve to 
prevent dirt and sediment in the line from lodging on the seat 
and causing improper closure of the magnetic valve. A hand 
valve installed ahead of the strainer is also recommended. 
New galvanized iron pipe, properly reamed and free from 
foreign chips should be used when installing the valve. Never 
coat threads of valve body or the first and second threads of the 
pipe with pipe dope. Pipe dope is apt to lodge on the seat and 
cause improper seating of the valve. 
Install the valve in the line in a vertical upright position, 
with the flow through the valve in the same direction as the 
arrow on the valve body. 
WIRING: These valves are provided with a conduit opening 
(2-Fig. 3) and leads of sufficient length for making splices. 
Use No. 14 rubber covered wire in conduit or BX for the wiring 
to the valve. 
For convenience in making connections to the valve the 
position of the conduit opening can be changed by loosening 
the clamp nut (11-Fig. 3) and turning the conduit opening to 
the desired position. 
All wiring must comply with local electrical ordinances. 
TYPE V837A valve is designed for use with a low voltage 
power supply only. Select from Table No. 1 the correct trans- 
former for the voltage and frequency to be used. 
When the installation has been completed, check the wiring 
for shorts, defects, etc. by making and breaking the circuit at 
the controller and noting whether or not the valve opens and 
closes properly. 
March 27, 1947 PAGE 
Supersedes Form 95-1042 1 
Dated October 15, 1945 
VOLTAGE AND TRANS- 
FREQUENCY FORMER 
115 Volt—50-60 Cycle AT72Al1K 
115 Volt—25-30 Cycle AT73A1M 
230 Volt—50-60 Cycle AT72Al1L 
230 Volt—25-30 Cycle AT73A1B 
Table No. | 
NOTE 
TRANSFORMER 
MUST BE USED 
WITH V837 VALVE 
HUMIDITY 
CONTROL 
TRANSFORMER 
(IF USED) 
Fig. 1—Connection diagram for 
V4327A and V837A valves. 
NOTE 
TRANSFORMER 
MUST BE USED 
WITH V837 VALVE 
TRANSFORMER 
(IF USED) 
Fig. 2—Connection diagram for 
V437A and V837A valves. 
file by Type SECTION 8A 
SOLENOID VALVES 
Order This Sheet by 
Form Number 95-1042 
