Boiler Controls

Bell & Gossett TFI-4 Thermoflo Indicator 4" Sweat Part Number 140006 is an indicating flow meter for measuring the flow of heated or chilled water. Installed in each circuit of a hydronic system, it permits simple balancing to meet design flow...

140005 Bell & Gossett TFI-3 Thermoflo Indicator 3" Sweat Part Number 140005 is an indicating flow meter for measuring the flow of heated or chilled water. Installed in each circuit of a hydronic system, it permits simple balancing to meet design...

140004 Bell & Gossett TFI-2-1/2 Thermoflo Indicator 2-1/2" Sweat Part Number 140004 is an indicating flow meter for measuring the flow of heated or chilled water. Installed in each circuit of a hydronic system, it permits simple balancing to...

181405 McDonnell & Miller Relief Valve 250-3/4-40. Features and Benefits: For tanks and hydronic heating systems Protects against over-pressure Minimizes hammering with flash steam Low differential pressure – 3 psi (.21 kg/cm2) between...

163200 McDonnell & Miller 93 LWCO 93-7B-HB, comes with standard number 7B switch, for models #93 and #193 controls. Information: McDonnell & Miller LWCO Instruction Manual

172812 McDonnell & Miller 157S-M 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 high...

120602 McDonnell & Miller FS8-WJ Flow Switch 1 BSTP. *Please note image is generic. Information: Mcdonnell & Miller 120601 Instruction Manual Features: For general purpose applications with environmental exposure, or those...

22-AV Armstrong SS Air Vent 3/4" NPT 474 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...

22-AV Armstrong SS Air Vent 3/4" NPT 126 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 570 psi 7/64". 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...

172817 McDonnell & Miller 157S-M Hi Pressure Level Control. Information: McDonnell & Miller 150S/157S Instruction Manual Specifications For boilers of any steaming capacity Monel bellows provides corrosion resistance Snap action...

176802 McDonnell & Miller 157S-RD-MD Hi Pressure Level Control. Information: McDonnell & Miller 150S/157S Instruction Manual Specifications For boilers of any steaming capacity Monel bellows provides corrosion resistance Snap action...

176503 McDonnell & Miller 157S-RBP-MD Hi Pressure Level Control. Information: 176503 McDonnell & Miller 150S/157S Instruction Manual Specifications For boilers of any steaming capacity Monel bellows provides corrosion resistance Snap...

176223 McDonnell & Miller 157S-P-MD Hi Pressure Level Control. McDonnell & Miller 150S/157S Instruction Manual Features For boilers of any steaming capacity Model 175802 - 157S-P Monel bellows provides corrosion resistance Snap action...

175802 McDonnell & Miller 157S-P Hi Pressure Level Control. McDonnell & Miller 150S/157S Instruction Manual Features For boilers of any steaming capacity Model 175802 - 157S-P Monel bellows provides corrosion resistance Snap action...

172811 McDonnell & Miller Hi Pressure Level Control 157S-A-M.  McDonnell & Miller 150S/157S Instruction Manual Specifications For boilers of any steaming capacity Model 173702 - 157S-A-M Monel bellows provides corrosion...

172807 McDonnell & Miller Hi Pressure Level Control 150S-M-MD. McDonnell & Miller 150S Instruction Manual Specifications For boilers of any steaming capacity Monel bellows provides corrosion resistance Snap action switches for high...

137100 McDonnell & Miller 53-2 Mechanical 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...

135200 McDonnell & Miller Mechanical Water Feeder LWCO 51-2-M. Mcdonnell & Miller 135200 Instruction Manual Features: For low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m2) capacity with cold water...

The Series 153603-LWCO - McDonnell & Miller PSE-801-M-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...

135300 McDonnell & Miller 51-2-M-HD Head Mechanism for Mechanical Water Feeder. *Please note image is generic. This Item Usually Ships The Same Day!

132700 McDonnell & Miller Water Feeder 47. Features: For steam and hot water boilers with cold water feed Continuous maintenance of minimum safe water level, independent of electrical service Proportional feed action Quick hook-up fittings...

114785 McDonnell & Miller FS5-J-1 Flow Switch 1 BSTB. 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...

165300 McDonnell & Miller 94-HD Head Mechanism. *Please note image is generic. This Item Usually Ships The Same Day!

120174 McDonnell & Miller FS7-4SDJ Flow Switch 1-1 4 BST. *Please note image is generic. Mcdonnell & Miller 120160 Instruction Manual Features: Universal design serves the widest variety of large pipe applications, including heating and...

120171 McDonnell & Miller FS7-4SJ Flow Switch 1-1 4 BSTP. *Please note image is generic. Mcdonnell & Miller 120160 Instruction Manual Features: Universal design serves the widest variety of large pipe applications, including heating and...

120158 McDonnell & Miller FS7-4ELJ Flow Switch 1-1 4 BST. McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: For hazardous environment applications requiring a NEMA 7 (Class I, Group C or D) or...

120135 McDonnell & Miller FS7-4EJ Flow Switch 1-1 4 BSTP. *Please note image is generic. McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: For hazardous environment applications requiring a NEMA 7...

115654 McDonnell & Miller FS6-WJ-1 Flow Switch 1 BSTP. *Please note image is generic. McDonnell & Miller FS6 Instruction Manual This McDonnell & Miller flow switch is for heavy duty applications where high sensitivity is required,...

115653 McDonnell & Miller FS6-WJ-3 4 Flow Switch 3 4 BSTP *Please note image is generic. McDonnell & Miller FS6 Instruction Manual This McDonnell & Miller flow switch is for heavy duty applications where high sensitivity is required,...

122920 McDonnell Miller AF1-J Air Flow Switch. *Please note image is generic. McDonnell & Miller AF1 Flow Switch Instruction Manual For general purpose applications with medium and high velocity requirements: Paddle fits 8" (203mm) minimum...

120361 McDonnell & Miller FS7-4WLJ Flow Switch 1-1 4BSTP. *Please note image is generic. McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: Universal design serves the widest variety of large pipe...

119980 McDonnell & Miller FS7-4LJ Flow Switch 1-1 4 BSTP. *Please note image is generic. McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: Universal design serves the widest variety of large pipe...

115650 McDonnell & Miller FS6-J-1 Flow Switch 1 BSTP. *Please note image is generic. McDonnell & Miller FS6 Instruction Manual Features: In-line configuration eliminates need for a pipe tee Very high flow capacity Actuates at extremely...

115550 McDonnell & Miller FS6-J-3 4 Flow Switch 3 4 BSTP. *Please note image is generic. McDonnell & Miller FS6 Instruction Manual This McDonnell & Miller flow switch is for heavy duty applications where high sensitivity is required,...

D538205 Armstrong 23-312 Air Vent 3/4 NPT 600PSI 1/16 Orifice. Please note image is generic. Information: Armstrong Series 23-312 Air Vent Submittal Sheet Armstrong Series 23-312 Air Vent Information Sheet Please Contact Us For Lead Time!

22-AV Armstrong SS Air Vent 3/4" NPT 371 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...

22-AV Armstrong SS Air Vent 3/4" NPT 217 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...

22-AV Armstrong SS Air Vent 3/4" NPT 57 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...

22-AV Armstrong SS Air Vent 3/4" NPT 35 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...