Boiler Controls

Boiler Controls

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  • 120601 McDonnell & Miller FS8-W - 1" Flow Switch
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    120601 McDonnell & Miller FS8-W - 1" Flow Switch

    McDonnell & Miller

    $248.95
    120601 McDonnell & Miller FS8-W - 1" Flow Switch General purpose flow switch w/NEMA 4X enclosure 120601. Mcdonnell & Miller 120601 Instruction Manual For general purpose applications with environmental exposure, or those requiring a...
    $248.95
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    $248.95
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  • 114400 McDonnell & Miller FS4-3 1" Flow Switch 1" NPT
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    114400 McDonnell & Miller FS4-3 1" Flow Switch

    McDonnell & Miller

    $204.95
    114400 McDonnell & Miller FS4-3 1" Flow Switch 1" NPT. Click here for more info on McDonnell & Miller Flow Switches Universal design serves the widest variety of applications. For starting or stopping electrically operated equipment such as...
    $204.95
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    $204.95
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  • 120611 McDonnell & Miller FS251
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    120611 McDonnell & Miller FS251 Flow Switch With NEMA 1 Enclosure

    McDonnell & Miller

    $192.95
    McDonnell & Miller FS251 General Purpose Flow Switch With NEMA 1 Enclosure 120611, Replaces FS4-3. Information: McDonnell & Miller FS4 Brochure McDonnell & Miller FS4 Instruction Manual Features Universal design serves the widest...
    $192.95
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    $192.95
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  • A2D33 - Goulds Pump Master Float Switch
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    A2D33 Goulds Pump Master Float Switch

    Goulds

    $118.95
    A2D33 - Goulds Pump Master Float Switch. This Item Usually Ships The Same Day!
    $118.95
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    $118.95
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  • 113021 Bell & Gossett Automatic Air Vent Model 87
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    113021 Bell & Gossett Automatic Air Vent Model 87

    Bell & Gossett

    $114.95
    113021 Bell & Gossett Automatic Air Vent Model Number 87 1/2" Female & 3/4" Male. 113021 Bell & Gossett Air Vent Brochure This Item Usually Ships The Same Day!
    $114.95
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    $114.95
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  • 120610 McDonnell & Miller FS254 Flow Switch
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    120610 McDonnell & Miller FS254 Flow Switch With NEMA 4 Enclosure

    McDonnell & Miller

    $314.95
    120610 McDonnell & Miller FS254 Flow Switch With NEMA 4 Enclosure, Replaces FS8-W. McDonnell & Miller FS254 Brochure Features: Universal design serves the widest variety of applications For starting or stopping electrically operated...
    $314.95
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    $314.95
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  • 113076 Bell & Gossett Air Vent 107A W/Cast Iron Body
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    113076 Bell & Gossett Air Vent 107A W/Cast Iron Body

    Bell & Gossett

    $998.95
    113076 Bell & Gossett Air Vent 107A 3/4" Cast Iron Body, 150psi 250°F. Information: Bell & Gossett 107A High Capacity Air Vent Brochure Bell & Gossett 107A High Capacity Air Vent Technical Brochure Bell & Gossett 107A High...
    $998.95
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    $998.95
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  • 113200 McDonnell & Miller FS-1 1/2" Liquid Flow Switch
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    113200 McDonnell & Miller FS-1 1/2" Liquid Flow Switch

    McDonnell & Miller

    $315.95
    113200 McDonnell & Miller FS-1 1/2" Liquid Flow Switch. McDonnell & Miller FS1 Instruction Manual Features: For general purpose applications where high sensitivity is required and moderate or low flow rates are encountered such as air...
    $315.95
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    $315.95
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  • 153900 McDonnell & Miller Low Water Cut Off 69
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    153900 McDonnell & Miller Low Water Cut Off 69

    McDonnell & Miller

    $462.95
     153900 McDonnell & Miller Mechanical Low Water Cut Off 69. Float Type Low Water Cut Off For Millivolt Service. Information: McDonnell & Miller LWCO Model 69 General Catalog McDonnell & Miller LWCO Model 69 Installation...
    $462.95
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    $462.95
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  • 114780 McDonnell & Miller FS5-1 - 1" Flow Switch
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    114780 McDonnell & Miller FS5-1 - 1" Flow Switch

    McDonnell & Miller

    $339.95
    114780 McDonnell & Miller FS5-1 - 1" Flow Switch 114780. 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,...
    $339.95
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    $339.95
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  • 123400 McDonnell & Miller Air Flow Switch Model AF3
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    123400 McDonnell & Miller AF3 Air Flow Switch

    McDonnell & Miller

    $228.95
    123400 McDonnell & Miller Air Flow Switch Model AF3. McDonnell & Miller AF1 Flow Switch Instruction Manual For general purpose low velocity applications where the most economical flow switch is desired. Paddle fits 8" (203mm)...
    $228.95
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    $228.95
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  • 113222 Bell & Gossett Model 97 Automatic Air Vent
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    113222 Bell & Gossett Model 97 Automatic Air Vent

    Bell & Gossett

    $18.50
    113222 Bell & Gossett Model 97 Automatic Air Vent. The number 97 is a float type automatic air vent that is designed to vent troublesome air from hydronic heating systems. Brass body with non-ferrous internals. Maximum working pressure: 150 PSI...
    $18.50
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    $18.50
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  • 127001 Bell & Gossett TB-3/4 Thermoflo Balancer
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    127001 Bell & Gossett TB-3/4 Thermoflo Balancer

    Bell & Gossett

    $424.95
    127001 Bell & Gossett TB-3/4 Thermoflo Balancer. The Thermoflo Balancer is an indicating flow meter and balancing device for measuring and balancing hydronic circuits. Installed in each circuit of a system, it permits simple balancing...
    $424.95
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    $424.95
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  • 114639 McDonnell & Miller FS4-3RP-T 1" Flow Switch FS4-3 With Test Button
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    114639 McDonnell & Miller FS4-3RP-T 1" Flow Switch

    McDonnell & Miller

    $264.95
    114639 McDonnell & Miller FS4-3RP-T 1" Flow Switch FS4-3 With Test Button. McDonnell & Miller FS4 Brochure McDonnell & Miller FS4 Instruction Manual Universal design serves the widest variety of applications. For starting or stopping...
    $264.95
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    $264.95
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  • 127002 Bell & Gossett TB-1 Thermoflo Balancer
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    127002 Bell & Gossett TB-1 Thermoflo Balancer

    Bell & Gossett

    $434.95
    127002 Bell & Gossett TB-1 Thermoflo Balancer The Thermoflo Balancer is an indicating flow meter and balancing device for measuring and balancing hydronic circuits. Installed in each circuit of a system, it permits simple balancing to...
    $434.95
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    $434.95
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  • 173003 McDonnell & Miller 150S-HD Head Mechanism Only
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    173003 McDonnell & Miller 150S-HD Head Mechanism Only

    McDonnell & Miller

    $992.95
    173003 McDonnell & Miller 150S-HD Head Mechanism Only, Automatic Reset, for 150S, 157S, 158S. Please Contact Us For Lead Time!
    $992.95
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    $992.95
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  • 181725 McDonnell & Miller Relief Valve 250-3/4-100
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    181725 McDonnell & Miller Relief Valve 250-3/4-100

    McDonnell & Miller

    $184.95
    181725 McDonnell & Miller Relief Valve 250-3/4-100. 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...
    $184.95
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    $184.95
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  • 126400 McDonnell & Miller Make-Up Water Feeder Model 21
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    126400 McDonnell & Miller 21 Make-Up Water Feeder Model 21

    McDonnell & Miller

    $957.95
    126400 McDonnell & Miller Make-Up Water Feeder Model 21. Mcdonnell & Miller Model 21 Instruction Manual For boiler receiver tanks Direct mounting eliminates need for equalizing connections Proportional feed action Mounting Flange –...
    $957.95
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    $957.95
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  • 113246 Bell & Gossett Model 98 Automatic Air Vent
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    113246 Bell & Gossett Model 98 Automatic Air Vent

    Bell & Gossett

    $104.95
    113246 Bell & Gossett Automatic Air Vent Model 98. Float style automatic brass air vent eliminates troublesome air from hydronic systems. The 98 air vent is designed with non-ferrous internals and a brass body and cap. Maximum working pressure:...
    $104.95
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    $104.95
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  • 123000 McDonnell & Miller Air Flow Switch Model AF1-S
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    123000 McDonnell & Miller Air Flow Switch AF1-S

    McDonnell & Miller

    $444.95
    123000 McDonnell & Miller Air Flow Switch AF1-S. *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)...
    $444.95
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    $444.95
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  • 169550 McDonnell & Miller Universal Water Feeder Uni-Match WFE-24V
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    169550 McDonnell & Miller WFE-24V Universal Water Feeder Uni-Match

    McDonnell & Miller

    $424.95
    169550 McDonnell & Miller Universal Water Feeder Uni-Match WFE-24V. McDonnell & Miller WFE-24V Instruction Manual McDonnell & Miller Universal Water Feeders are ideal for use in residential or small commercial applications. Versatile...
    $424.95
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    $424.95
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  • 113001 Bell & Gossett Model 7 Air Vent
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    113001 Bell & Gossett Model 7 Air Vent

    Bell & Gossett

    $109.95
    113001 Bell & Gossett Model 7 Air Vent. The B&G Air Vent model 7 has a maximum pressure of 75 psi and 240 degrees F and 1/8" IPM. Please see the brochure for more info. Information: 113001 Bell & Gossett Air Vent Brochure This Item...
    $109.95
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    $109.95
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  • 113020 Bell & Gossett Automatic Air Vent Model 67
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    113020 Bell & Gossett Automatic Air Vent Model 67

    Bell & Gossett

    $46.95
    113020 Bell & Gossett Automatic Air Vent Model Number 67 Male Threaded. The Bell & Gossett model 7 is rated at maximum operating temperature of 240°F at 75 psi. Bell & Gossett 113020 Air Vent Brochure This Item Usually Ships The...
    $46.95
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    $46.95
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  • 114760 McDonnell & Miller FS5-3/4 - 3/4" Flow Switch
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    114760 McDonnell & Miller FS5-3/4 - 3/4" Flow Switch

    McDonnell & Miller

    $354.95
    114760 McDonnell & Miller FS5-3/4 - 3/4" Flow Switch 114760. Information: McDonnell & Miller FS5 Instruction Manual Features: For general purpose applications requiring low flow rate sensitivity In-line configuration eliminates need...
    $354.95
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    $354.95
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  • 11AV 5/64 Armstrong 3/4" Stainless Steel Air Vent 400PSI
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    11AV 5/64 Armstrong 3/4" Stainless Steel Air Vent 400PSI

    Armstrong

    $534.95
    11AV 5/64 Armstrong 3/4" Stainless Steel Air Vent 400PSI. 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...
    $534.95
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    $534.95
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  • 143600 McDonnell & Miller Mechanical Low Water Cut Off 64
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    143600 McDonnell & Miller Mechanical Low Water Cut Off 64

    McDonnell & Miller

    $694.95
    143600 McDonnell & Miller Mechanical Low Water Cut Off 64. Mechanical LWCO For Steam Boilers. Mcdonnell & Miller LWCO Series 64 Instruction Manual Features: For residential and commercial low pressure steam boiler applications For...
    $694.95
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    $694.95
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  • 401422 - Hoffman 1A - 1/8" vent radiator steam
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    401422 Hoffman 1A 1/8" Adjustable Angle Steam Radiator Air Valve

    Hoffman

    $64.95
    401422 - Hoffman 1A - 1/8" Adjustable Angle Steam Radiator Air Valve. This Item Usually Ships The Same Day!
    $64.95
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    $64.95
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  • 119700 McDonnell & Miller FS7-4 - 1-1/4" Flow Switch
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    119700 McDonnell & Miller FS7-4 - 1-1/4" Flow Switch

    McDonnell & Miller

    $574.95
    119700 McDonnell & Miller FS7-4 - 1-1/4" Flow Switch Paddle Style. Information: McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: Universal design serves the widest variety of large pipe...
    $574.95
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    $574.95
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  • McDonnell & Miller FS4-3S 1" Flow Switch w/Stainless Steel Body Monel Bellows 114641
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    114641 McDonnell & Miller FS4-3S 1" Flow Switch

    McDonnell & Miller

    $514.95
    McDonnell & Miller FS4-3S 1" Flow Switch w/Stainless Steel Body Monel Bellows 114641. McDonnell & Miller FS4 Brochure McDonnell & Miller FS4 Instruction Manual Universal design serves the widest variety of applications. For starting or...
    $514.95
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    $514.95
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  • 126800 McDonnell & Miller 25-A Make-Up Water Feeder
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    126800 McDonnell & Miller 25-A Make-Up Water Feeder

    McDonnell & Miller

    $1,308.95
    126800 McDonnell & Miller Make-Up Water Feeder Model 25-A. McDonnell & Miller Model 21 Water Feeder Instruction Manual Features: For boiler receiver tanks Float operated Proportional feed action Soft seat provides positive seal Seal...
    $1,308.95
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    $1,308.95
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  • 173502 McDonnell & Miller Hi Pressure Level Control 157S
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    173502 McDonnell & Miller Hi Pressure Level Control 157S

    McDonnell & Miller

    $1,380.95
    173502 McDonnell & Miller Hi Pressure Level Control 157S. Information: McDonnell & Miller 150S/157S Instruction Manual Specifications For boilers of any steaming capacity Model 157S - 173502 Monel bellows provides corrosion...
    $1,380.95
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    $1,380.95
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  • 120201 McDonnell & Miller FS7-4W - 1-1/4" Flow Switch
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    120201 McDonnell & Miller FS7-4W - 1-1/4" Flow Switch

    McDonnell & Miller

    $649.95
    120201 McDonnell & Miller FS7-4W - 1-1/4" Flow Switch w/NEMA 4X Enclosure 120201. Information: Mcdonnell & Miller 120201 Instruction Manual Features: For applications requiring a water-tight, dust-tight or a NEMA 4X rated flow switch...
    $649.95
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    $649.95
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  • 11AV-1/8 Armstrong 3/4" Stainless Steel Air Vent 178PSI
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    11AV-1/8 Armstrong 3/4" Stainless Steel Air Vent 178PSI

    Armstrong

    $784.95
    11AV-1/8 Armstrong 3/4" Stainless Steel Air Vent 178PSI. 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...
    $784.95
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    $784.95
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  • 113075 Bell & Gossett Vacuum Breaker #26
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    113075 Bell & Gossett Vacuum Breaker #26

    Bell & Gossett

    $184.95
    113075 Bell & Gossett Vacuum Breaker #26. Designed to protect closed vessels and piping systems against collapse when the induced vacuum exceeds design conditions. When used on steam heating systems, the No. 26 Vacuum Breaker controls induced...
    $184.95
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    $184.95
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  • 115400 McDonnell & Miller FS6-3/4 - 3/4" Flow Switch
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    115400 McDonnell & Miller FS6-3/4 - 3/4" Flow Switch

    McDonnell & Miller

    $569.95
    115400 McDonnell & Miller FS6-3/4 - 3/4" Flow Switch-High Sensitivity. McDonnell & Miller FS6 Instruction Manual This McDonnell & Miller flow switch is for heavy duty applications where high sensitivity is required, such as water...
    $569.95
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    $569.95
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  • 127100 McDonnell & Miller 25-A-HD Head Assembly
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    127100 McDonnell & Miller 25-A-HD Head Assembly

    McDonnell & Miller

    $1,157.95
    127100 McDonnell & Miller 25-A-HD Head Assembly. Features: For boiler receiver tanks Float operated Proportional feed action Soft seat provides positive seal Seal between float chamber and valve chamber is not a positive seal Maximum water...
    $1,157.95
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    $1,157.95
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  • 115300 McDonnell & Miller FS4-3T3-1 - 1" Flow Switch
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    115300 McDonnell & Miller FS4-3T3-1 - 1" Flow Switch

    McDonnell & Miller

    $351.95
    115300 McDonnell & Miller FS4-3T3-1 - 1" Flow Switch With NPT Body Low Flow Rate 115300. McDonnell & Miller FS4 Instruction Manual Features: For starting or stopping electrically operated equipment such as signal lights, alarms, motors,...
    $351.95
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    $351.95
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  • 149400 McDonnell & Miller 67 Mechanical Low Water Cut Off
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    149400 McDonnell & Miller 67 Mechanical Low Water Cut Off

    McDonnell & Miller

    $586.95
    149400 McDonnell & Miller 67 Mechanical Low Water Cut Off. Mcdonnell & Miller LWCO Series 67 Instruction Manual Mcdonnell & Miller LWCO Series 67 Submittal Sheet Features: For boilers of any steaming capacity Residential and...
    $586.95
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    $586.95
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  • 142400 McDonnell & Miller Mechanical LWCO 63
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    142400 McDonnell & Miller Mechanical LWCO 63

    McDonnell & Miller

    $684.95
    142400 McDonnell & Miller Mechanical Low Water Cut Off 63. Mechanical For Steam Boilers. Mcdonnell & Miller LWCO Series 63 Instruction Manual Features: For residential and commercial low pressure steam boiler applications For boilers...
    $684.95
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    $684.95
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  • 114900 McDonnell & Miller FS4-3T2-3/4 - 3/4" Flow Switch
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    114900 McDonnell & Miller FS4-3T2-3/4 - 3/4" Flow Switch

    McDonnell & Miller

    $324.95
    114900 McDonnell & Miller FS4-3T2-3/4 - 3/4" Flow Switch With NPT Body Medium Flow Rate 114900. McDonnell & Miller FS4 Instruction Manual Features: For starting or stopping electrically operated equipment such as signal lights, alarms,...
    $324.95
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    $324.95
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