Boiler Controls

119900 McDonnell & Miller FS7-4L - 1-1/4" Flow Switch With Extended Paddle & Paddle Arm 119900. Information: McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: Universal design serves the widest...

119750 McDonnell & Miller FS7-4D - 1-1/4" Flow Switch With /2 SPDT. McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: Universal design serves the widest variety of large pipe applications, including...

115200 McDonnell & Miller FS4-3T2-1 - 1" Flow Switch With NPT Body Medium Flow Rate 115200. McDonnell & Miller FS4 Instruction Manual Features: For starting or stopping electrically operated equipment such as signal lights, alarms,...

120605 McDonnell & Miller FS8-WZ Flow Switch 1 NPT. *Please note image is generic. Information: Mcdonnell & Miller 120601 Instruction Manual Features: For general purpose applications with environmental exposure, or those requiring...

A9739 Armstrong Air Vent For "A, K and J" Series Steam Traps. This air vent is for use with all "A, K and J" Series Float & Thermostatic Steam Traps with 30 to 175 pound operating pressures. This Item Usually Ships The Same Day!

The series 153927 McDonnell & Miller PSE-802-RX2-24 Low Water Cut Off.  This Item Usually Ships The Same Day!

129702 McDonnell & Miller LWCO 42S-A Pump Controller. 129702 McDonnell & Miller LWCO 42S-A Pump Controller Instruction Manual For residential, commercial, and industrial low and medium pressure steam boilers with a separate water column For...

137200 McDonnell & Miller Mechanical Water Feeder 53-2M. For low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m2 ) with hot or cold water feed Optional features No. 2 switch Manual reset Float block Proportional...

136900 McDonnell & Miller Mechanical 53 Water Feeder. Features: For low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m2 ) with hot or cold water feed Optional features No. 2 switch Manual reset Float...

176296 McDonnell & Miller 752-MT-24 Low Water Cut Off. Information: Product Brochure This Item Usually Ships The Same Day!

313600 McDonnell & Miller 37A-130 Replacement Float for 847 and 851. This Item Usually Ships The Same Day!

165900 McDonnell & Miller Level Control 94M. Information: Mcdonnell & Miller Submittal Sheet Features For commercial and industrial low or high pressure steam boilers Maintains consistent water level regardless of pressure For...

162500 McDonnell & Miller High Pressure Level Control 93-M. Information: McDonnell & Miller Submittal Sheet Features For commercial and industrial low or high pressure steam boilers Maintains consistent water level regardless of...

120175 McDonnell & Miller FS7-4SE - 1-1/4" Flow Switch With Stainless Steel Body And NEMA 7 & 9 Enclosure. Mcdonnell & Miller 120175 Instruction Manual Features: For hazardous environment applications requiring a NEMA 7 (Class I,...

114795 McDonnell & Miller FS5-S-1 - 1" Flow Switch With Stainless Steel Body 114795. McDonnell & Miller FS5 Instruction Manual Features: In-line configuration eliminates need for a pipe tee Sizes available: 3/4" NPT, 1" NPT Materials...

114765 McDonnell & Miller FS5-J-3/4 - 3/4" Flow Switch. McDonnell & Miller FS5 Instruction Manual Features: In-line configuration eliminates need for a pipe tee Sizes available: 3/4" NPT, 1" NPT Materials of construction: Brass, carbon...

22-AV Armstrong SS Air Vent 3/4" NPT 600 psi. The Armstrong all-stainless steel guided lever air vents have been developed to provide positive venting of air/gases under pressure. For pressures to 600 psig (41 bar) or specific gravity down to 0...

13-AV Armstrong SS Air Vent 1" NPT 45 psi. The Armstrong all-stainless steel guided lever air vents have been developed to provide positive venting of air/gases under pressure. For pressures to 600 psig (41 bar) or specific gravity down to 0.50...

113041 Bell & Gossett DT-2 Drain-O Tank Air Charger. DT-2 DRAIN-O-TANK® AIR CHARGER - The Drain-O-Tank Air Charger offers a sure, quick way to recharge a water-logged compression tank.  This Item Usually Ships The Same Day!

172815 McDonnell & Miller LWCO 157S-RLM. Please Contact Us For Lead Time.

173603 McDonnell & Miller 157S-MD Hi Pressure Level Control. McDonnell & Miller 150S/157S Instruction Manual Specifications For boilers of any steaming capacity Model 173603 - 157S-MD Monel bellows provides corrosion resistance Snap...

175402 McDonnell & Miller 157S-M Hi Pressure Level Control. *Please note this item is discontinued and replaced by the 172812 McDonnell & Miller 157S-M Hi Pressure Level Control. Information: McDonnell & Miller 150S/157S Instruction...

 **Discontinued 149700 McDonnell & Miller Mechanical Low Water Cut Off 67-M. Float Type Low Water Cut Off For Millivolt Service. P/N's 149400 and 354001 are the equivalent to P/N 149700. Information: McDonnell & Miller LWCO...

134700 McDonnell & Miller Mechanical Water Feeder 51. For low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m2) capacity with cold water feed Quick-change replaceable cartridge valve and strainer Optional...

The Series 153827-LWCO McDonnell & Miller PSE-801-120 Probe Control type LWCO uses patented technology to monitor changes in water conductivity. When defined parameters are exceeded the new PSE-800 makes a decision to shut the burner off based...

The Series 153876 - McDonnell & Miller PS-801-U-120 Probe Control type LWCO uses patented technology to monitor changes in water conductivity. When defined parameters are exceeded the new PSE-800 makes a decision to shut the burner off based on...

135100 McDonnell & Miller 51-2-HD Head Mechanism for Mechanical Water Feeder. This Item Usually Ships The Same Day!

115100 McDonnell & Miller FS4-3T1-1 - 1" Flow Switch With NPT Body High Flow Switch. McDonnell & Miller FS4 Instruction Manual Features: For starting or stopping electrically operated equipment such as signal lights, alarms, motors,...

164400 McDonnell & Miller 193-7B LWCO & Pump CTRL. w/ Potentiometer. Information: McDonnell & Miller LWCO Instruction Manual Features: For commercial and industrial low or high pressure steam boilers Maintains consistent water...

13-AV Armstrong SS Air Vent 1" NPT 309 psi. The Armstrong all-stainless steel guided lever air vents have been developed to provide positive venting of air/gases under pressure. For pressures to 600 psig (41 bar) or specific gravity down to 0...

144693 McDonnell & Miller RB-24E-S Low Water Cut Off. This Item Usually Ships The Same Day!

177251 McDonnell & Miller 157S-RLS-M-MD Hi Pressure Level Control. McDonnell & Miller 150S/157S Instruction Manual Specifications For boilers of any steaming capacity Monel bellows provides corrosion resistance Snap action switches for...

172813 McDonnell & Miller 157S-M-MD Hi Pressure Level Control. McDonnell & Miller 150S/157S Instruction Manual Features For boilers of any steaming capacity Model 175412 - 157S-M-MD Monel bellows provides corrosion resistance Snap...

173702 McDonnell & Miller Hi Pressure Level Control 157S-A. Information: 173702 McDonnell & Miller 150S/157S Instruction Manual Specifications For boilers of any steaming capacity Model 173702 - 157S-A Monel bellows provides corrosion...

 129802 McDonnell & Miller LWCO 42S-N Pump Controller. Instruction Manual For residential, commercial, and industrial low and medium pressure steam boilers with a separate water column For boilers of any steaming capacity Monel bellows...

 143700 McDonnell & Miller 64A Mechanical Low Water Cut Off. Mechanical LWCO For Steam Boilers. Mcdonnell & Miller LWCO Series 64 Instruction Manual Features: Optional manual reset is available For boilers of any steaming...

136000 McDonnell & Miller 51-S-2-M Mechanical Water Feeder. Information: Mcdonnell & Miller 136000 Series 51-S-2-M Instruction Manual Features: Proportional feed action Maximum water supply pressure 100 psi (7 kg/cm2) Maximum inlet...

176212 McDonnell & Miller Mechanical Water Feeder 47X-2. This Item Usually Ships The Same Day!

165500 McDonnell & Miller High Pressure Level Control 94A. Mcdonnell & Miller Submittal Sheet Features For commercial and industrial low or high pressure steam boilers Maintains consistent water level regardless of pressure For...

120150 McDonnell & Miller FS7-4EL - 1-1/4" Flow Switch With NEMA 7 & 9 Enclosure w/Extended Paddle & Paddle Arm 120150. McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: For hazardous...