Clark Reliance — Boiler Controls
Cast Iron Water Columns
For Pressures 0 to 250 psi
Clark-Reliance® Water Columns
Clark-Reliance manufactures a small, cast iron, float type water column and a larger size cast iron water column that can be either float type or probe type (Universal Column W0250). Available in high pressure and low pressure configurations for boiler water level indication.
Clark-Reliance manufactures a small, cast iron, float type water column and a larger size cast iron water column that can be either float type or probe type (Universal Column W0250). To select the proper water column model, first acquaint yourself with the types of columns available, then:
- →Determine the gage glass visibility required.
- →Determine the steam and water center dimension.
- →Determine the alarm variation requirements.
- →List the alarm/control functions desired.
Material Note: The cast iron used in Clark Reliance Column 1 and W0250 water columns is ASTM A278-CL30. For recommended installation procedures, refer to Catalog 500, Section AB2.4. The lowest visible part of water gage glass must be at least 2 inches above the lowest permissible boiler water level.
Column 1 — Float Type
Small Column Size · Fixed Dimensions · Fixed Connection Locations · Alarm Function Only
Column 1 is a comparatively small water column in regard to water gage center measurements and other related dimensions. Column 1 is available only with 1" or 1½" steam and water connections.
Float Type Water Column — W0250
Variable Gage Centers · Variable Steam/Water Locations · Alarm Function Only
Column W0250 provides water gage centers that can vary upon specification from 13½" to 23". Top or side steam and water connections can vary upon specification from 11½" to 22".
Conversion Columns: All Clark-Reliance cast iron, float type columns serving pressures to 250 PSI can be converted to accommodate a probe cap. This conversion brings fuel cut-out controls, as well as high/low alarms, to converted columns.
Probe Type Water Column — W0250-EA4
Variable Gage Centers · Variable Steam/Water Locations · Alarm & Fuel Cut-Out Functions
Column W0250-EA4 offers the same variations in water gage centers and steam/water connections as Column W0250-FA. In addition, W0250-EA4 also provides probe actuated high/low alarms and low fuel cut out control.
Column W0250-EA3 provides probe actuated high/low alarms only.
Probe Type Water Column — W0250-EA5 / EA6
Variable Gage Centers · Alarm & Fuel Cut-Out & Pump Control Functions
Column W0250-EA6 offers the same variations in water gage centers and steam/water connections as Column W0250-FA. In addition to probe actuated high/low alarms and low fuel cut-out functions, this column also provides probe controlled pump actuation. Column W0250-EA5 provides probe actuated high/low alarms in combination with low and high fuel cut-out.
Model Selection Guide
| Model | Float Type | Probe Type | High Alarm | Low Alarm | Fuel Cut-Out |
|---|---|---|---|---|---|
| COLUMN 1 | — | X | X | — | — |
| W0250-FA | X | — | X | — | — |
| W0250-EA3 | — | X | X | — | — |
| W0250-EA4 | — | X | X | X | — |
| W0250-EA5 | — | X | X | X | — |
| W0250-EA6 | — | X | X | X | X |
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