Mercoid Series 1261

Extreme-Service Float Level Control — High-Pressure Boiler & Refinery

Rated to 1500 psig — 600°F — ASME Code Construction — Stainless Steel

The Mercoid Series 1261 represents the most demanding service ratings in the Mercoid float switch line. Rated to 1500 psig at 600°F with full stainless steel construction and ASME code construction standard, the Series 1261 is specified for supercritical steam boilers, high-pressure refinery vessels, and power generation applications where failure is not an option. The heavy-duty chamber and precision-machined stainless steel float and trim ensure reliable operation in the most aggressive process conditions. DPDT and two-stage switch configurations are available for complex control schemes.

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Specifications

Service

Supercritical steam, high-pressure boilers, refinery and power generation vessels.

Wetted Materials

Body: alloy steel or 316 SS; Float and Trim: 316 stainless steel throughout.

Temperature Limit

600°F (316°C).

Pressure Limit

1500 psig (103 bar).

Enclosure Rating

NEMA 4X standard. Optional explosion-proof.

Switch Type

SPDT snap switch. Optional DPDT or two-stage.

Electrical Rating (Snap)

12A @ 120 VAC, 5A @ 240 VAC, 0.5A @ 125 VDC, 0.25A @ 250 VDC resistive.

Electrical Connections

Screw terminal.

Conduit Connection

3/4″ female NPT.

Process Connection

Flanged standard. Optional socket weld or NPT.

ASME Construction

Standard. Code stamp available.

Specific Gravity

0.7 minimum.

Agency Approvals

UL.

Popular Models

Model Number	Description
1261-WT-7810-C-60	Extreme-service float level control, SPDT snap switch, 1500 psig, ASME.
1261-WT-7810-C-60-DPDT	Extreme-service float level control, DPDT snap switch, 1500 psig, ASME.

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