Omega 123, 125 User guide

1 NPT

SERIES 123 & 125

BOILER WATER LEVEL CONTROL

LEVEL

Heavy Duty, Cast Iron Chamber

Ø5-3/4

[146.05]

1-1/8

[28.58]

3-9/16
[90.50]

7-1/8

[180.98]

The Series 123 & 125 Boiler Water Level Control is designed for boiler applications,
the Model 123 is primarily used for low water cut-off or feed-water control. The 125
offers the same long lasting service with a direct action mercury switch movement that
provides a close deadband where needed.

BENEFITS/FEATURES

• Special snap action switch mechanism options eliminates frequent operation due to
surging water level

• Transparent cover provides convenient visible operation of the switch

• Flangedchamberforeasycleanoutandreplacementofoatorswitchmechanism

without removing the unit from piping

APPLICATIONS

• Boiler low water cut-off

• Boiler feed-water control

• Condensate tanks

• Deaerators

MODEL CHART
Model Switch Type
123-153

123-7000-153

SPDT mercury
SPDT snap

5-1/2

[139.70]

7

[177.80]

SPECIFICATIONS
Service: Compatible liquids. Cast iron

isnotforusewithlethalorammable

substances either liquid or gaseous.
Wetted Materials: Body: Cast iron;
Float: 304 SS; Trim and packing gland:
Brass; Packing: Carbon; Body gasket:
Carbon.
Temperature Limit: Ambient
temperature: 212°F (100°C);
Process temperature: 365°F (185°C).

Pressure Limit: 150 psig (10.34 bar).
Enclosure Rating: General purpose.

Optional weatherproof.
Switch Type: SPDT snap switch or
mercury switch. Optional DPDT or two
stage.

1/2 PIPE PLUG
TYP 2 PLACES

3-9/16

5-3/8

[136.53]

Electrical Rating: Snap switch: 12 A
@ 120 VAC, 5 A @ 240 VAC, 0.5 A @
125 VDC resistive, 0.25 A @ 250 VDC
resistive; Mercury switch: 4 A @ 120
VAC/DC, 2 A @ 240 VAC/DC.

Electrical Connections: Screw terminal.
Conduit Connection:7/8˝(22.23mm)

holefor1/2˝(12.7mm)conduit.

Process Connections:1˝femaleNPT.
Mounting Orientation: Vertical.
Deadband:Approximately1-1/2˝

(38.1 mm).
Specic Gravity: 0.88 min.

Options: Manual reset.
Weight: 20 lb (9.1 kg).
Compliance: CSA, UL. (Snap switch is

not rated).

[90.50]

4-3/4

[120.65]

2-7/16
[61.91]