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Series 123/125 Boiler Water Level Control |
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Designed for boiler applications, the Model 123 is primarily used for low water cut-off or feed-water control. Other applications include condensate tanks and deaerators. A special snap action switch mechanism eliminates frequent operation due to surging water level. A transparent cover provides convenient visible operation of the switch. Features a flanged chamber for easy clean out and replacement of float or switch mechanism without removing the unit from piping. The 125 offers the same long lasting service with a direct action mercury switch movement that provides a close deadband where needed. |
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Service:
Compatible liquids. Cast iron is not for use with lethal or flammable
substances either liquid or gaseous.
Wetted Materials:
Body: cast iron. Float and Trim: 304 SS. Packing Gland: brass. Packing:
carbon. Body Gasket: carbon.
Temperature Limit:
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.
Electrical Rating:
Snap Switch: 15A @ 120/240/480 VAC, 0.5A @ 120 VDC resistive, 0.25A @
240 VDC resistive. Mercury Switch: 4A @ 120 VAC/DC, 2A @ 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.
Weight: 20 lb (9.1
kg).
Agency Approvals:
UL and CSA (snap switch is not rated).
Deadband:
Approximately 1-1/2" (38.1 mm).
Specific Gravity:
0.88 minimum.
Options: Manual
reset.
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| 123
Series |
123 123XLW 123WP 123RU 123RUSST 123RL 123RLSST 123RUXLW 123SST 123XLS 123SSTWP |
Single Stage, Automatic Reset, Brass Trim, Nema1 Replacement Float, Cap and Switch Assembly Only, No Chamber for 123 Single Stage, Automatic Reset, Brass Trim, Weatherproof Housing Single Stage, Manual Reset, Brass Trim, Nema1 Single Stage, Manual Reset, Stainless Steel Trim, Nema1 Single Stage, Manual Reset, Brass Trim, Nema1 Single Stage, Manual Reset, Stainless Steel Trim, Nema1 Replacement Float Cap and Switch Assembly Only, No Chamber 123RU Single Stage, Automatic Reset, Stainless Steel Trim, Nema1 Replacement Switch Assembly Only Single Stage, Automatic Reset, Stainless Steel Trim, Weatherproof Housing |
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| Circuits |
2 3 153 156 804 7000-153 |
SPST mercury switch,
closes on level increase SPST mercury switch, opens on level increase SPDT mercury switch 2 SPST mercury switches, electrically independant. One switch opens as the other closes. 2 SPDT mercury switches SPDT snap switch |
| 125
Series |
125 125XLW 125WP 125SST 125XLS 125SSTWP |
Two Stage, Automatic
Reset, Brass Trim, NEMA1 Replacement Float, Cap and Switch Assembly Only. No Chamber for 125 Two Stage, Automatic Reset, Brass Trim, Weatherproof Housing Two Stage, Automatic Reset, Stainless Steel Trim, Nema1 Replacement Switch Assembly Only for 125 Two Stage, Automatic Reset, SST Trim, Weatherproof Housing |
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| Circuits |
4820 4821 4810 4815 4806 |
SPST mercury switch
close on level fall, rated 10 amp 120 VAC/DC, 5 amp 240 VAC/DC, motor
rating 1 hp 120 VAC, 3/4 hp 240 VAC, 1/3 hp 120/240 VDC. SPST mercury switch open on level fall, rated 10 amp 120 VAC/DC, 5 amp 240 VAC/DC, motor rating 1 hp 120 VAC, 3/4 hp 240 VAC, 1/3 hp 120/240 VDC. SPDT mercury switch, one circuit closes as one circuit opens, rated 4 amp 120 VAC/DC, common ground. SPDT, consisting of two SPST mercury switches, electrically independent, one circuit closes as one circuit opens, each switch rated 10 amp 120 VAC/DC, 5 amp 240 VAC/DC. DPDT, consisting of two SPDT mercury switches, each switch has common ground, two circuits close as two circuits open, each switch rated 4 amp 120VAC/DC, 2 amp 240 VAC/DC. |
Phone: 604-254-9622
Fax: 604-254-3123
e-mail: info@johnsherman.com