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Cast Iron Water Columns For Pressures 0 to 250psi

HOW TO SPECIFY AND ORDER THE CLARK-RELIANCE CAST IRON WATER COLUMNS TO MEET YOUR INDIVIDUAL APPLICATION

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). Information contained in these pages describes the design and performance of each column.

To select the proper water column model, first acquaint yourself with the types of columns available, including a review of the Model Selection Guide presented below, and then complete the following recommended steps:

  • Determine the gage glass visibility required.
  • Determine the steam and water center dimension.
  • Determine the alarm variation requirements.
  • List the alarm/control functions desired.

Completion of these steps will direct you toward the proper model. If selection assistance is required, contact your local Clark-Reliance representative or the Clark Reliance Technical Services Department direct.

Installation Notes For recommended installation procedures, refer to Catalog 500, Section AB2.4. Also be advised that for all water column models the lowest visible part of water gage glass must be at least 2 inches above the lowest permissible boiler water level.

Material Note The cast iron used in Clark Reliance Column 1 and W0250 water columns is ASTM A278-CL30.

 
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

Probe Type*

High Alarm

Low Alarm

Low Fuel Cut-Out

COLUMN 1

----- X X -----

W0250-FA

  X X -----
-----

CONVERTED W0250-FA

------- AS SPECIFIED ------

-----

W0250-EA3

X X -----
-----

W0250-EA4

X X  
-----

W0250-EA5

X X  
-----

W0250-EA6

X X  
 
Float Type Water Column - WO250         
  • 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 - WO250-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 noted for Column W0250-FA and shown in Figure 4. 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 functions noted above are considered standard. Other probe functions may be added or substituted to meet specific requirements.

Probe Type Water Column - WO250-EA5                   
  • Variable Gage Centers
  • Alarm & Fuel Cut-Out & Pump Control Functions
  • Variable Steam/Water Locations

Column W0250-EA6 offers the same variations in water gage centers and steam/ water connections as noted for 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.

Probe functions noted above are considered standard. Other probe functions may be added or substituted to meet specific requirements

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