Oil Stems

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Oil Stems

Our precision-machined fuel oil stems ensure smooth valve actuation for reliable, high-performance boiler fuel regulation.

Get a Quote Order now (502) 459-9131

*These oil controllers are compatible with Cleaver-Brooks boilers.

  • 024-00081
    Oil Stem #S
    CB 50-60
  • 024-00082
    Oil Stem #1
    CB 50-80 #6 OIL/70-80 #2 OIL
  • 024-00083
    Oil Stem #2
    CB 100
  • 024-00084
    Oil Stem #3
    CB 125-150
  • 024-00085
    Oil Stem #4
    CB 200
  • 024-00086
    Oil Stem #5
    CB 250-350
  • 024-00087
    Oil Stem #6
    CB 400
  • 024-00088
    Oil Stem #7
    CB 500-700
  • 024-00089
    Oil Stem #8
    CB 800
  • 024-00090
    Oil Stem #9
    WT, CN SIZE 1-7

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In-stock items. Order by 3:00 PM EST for Same-Day Shipping.

*Halmar Corporation offers many Cleaver-Brooks aftermarket parts. Halmar Corporation is not a factory authorized sales representative for Cleaver-Brooks, nor is Halmar Corporation affiliated with Cleaver-Brooks in any way. Cleaver-Brooks is a registered trademark of Cleaver-Brooks, Inc., Thomasville, GA.

Some aftermarket parts may be made by other manufacturers.

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Frequently Asked Questions About Oil Stems

The fuel oil stem is a precision-machined component located within the fuel oil valve assembly. Its primary purpose is to actuate the valve mechanism, ensuring precise control over the flow and shut-off of liquid fuel into the burner. Because these stems are responsible for the physical opening and closing of the valve, they must maintain exact dimensional tolerances to ensure that fuel delivery is both reliable and repeatable. A properly functioning stem allows for accurate modulation of the fuel supply, which is essential for maintaining efficient combustion and stable flame operation.

Fuel oil stems operate under significant mechanical stress, repetitive cycling, and constant exposure to fuel oil, which can lead to wear, scoring, or bending over time. Signs that a stem needs replacement include increased resistance or stiffness when operating the valve, visible scoring or pitting on the stem surface, or persistent leaking from the valve packing area that cannot be resolved by tightening the packing gland. When a stem is worn or damaged, it can cause the valve to stick or fail to seat correctly, leading to uneven fuel delivery, potential safety hazards, or system downtime. Regularly inspecting these components during scheduled maintenance turnarounds is vital to ensure long-term, trouble-free boiler operation.

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