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

    $224.95
    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...
    $224.95
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    $224.95
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  • 120611 McDonnell & Miller FS251
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    120611 McDonnell & Miller FS251 Flow Switch With NEMA 1 Enclosure

    McDonnell & Miller

    $164.95
    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...
    $164.95
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    $164.95
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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

    $154.95
    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...
    $154.95
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    $154.95
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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

    $94.95
    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!
    $94.95
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    $94.95
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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

    $214.95
    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...
    $214.95
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    $214.95
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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

    $254.95
    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...
    $254.95
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    $254.95
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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

    $868.95
    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...
    $868.95
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    $868.95
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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

    $218.95
    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...
    $218.95
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    $218.95
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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

    $184.95
    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)...
    $184.95
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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

    $308.95
     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...
    $308.95
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    $308.95
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  • 127002 Bell & Gossett TB-1 Thermoflo Balancer
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    127002 Bell & Gossett TB-1 Thermoflo Balancer

    Bell & Gossett

    $389.95
    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...
    $389.95
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    $389.95
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  • 113001 Bell & Gossett Model 7 Air Vent
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    113001 Bell & Gossett Model 7 Air Vent

    Bell & Gossett

    $64.80
    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...
    $64.80
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    $64.80
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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

    $354.95
    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)...
    $354.95
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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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  • 113246 Bell & Gossett Model 98 Automatic Air Vent
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    113222 Bell & Gossett Model 97 Automatic Air Vent

    Bell & Gossett

    $17.50
    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...
    $17.50
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    $17.50
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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

    $274.95
    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,...
    $274.95
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    $274.95
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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

    $718.95
    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 –...
    $718.95
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    $718.95
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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

    $318.95
    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...
    $318.95
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    $318.95
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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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  • 113075 Bell & Gossett Vacuum Breaker #26
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    113075 Bell & Gossett Vacuum Breaker #26

    Bell & Gossett

    $104.95
    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...
    $104.95
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    $104.95
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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

    $454.95
    119700 McDonnell & Miller FS7-4 - 1-1/4" Flow Switch Paddle Style. McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: Universal design serves the widest variety of large pipe applications, including...
    $454.95
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    $454.95
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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

    $1,144.95
    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 between...
    $1,144.95
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    $1,144.95
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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

    $134.95
    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...
    $134.95
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    $134.95
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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

    $424.95
    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...
    $424.95
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    $424.95
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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

    $264.95
    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,...
    $264.95
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    $264.95
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  • 1AV-3/4  Armstrong Air Vent 3/4"P  1/8"
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    1AV-3/4 Armstrong Air Vent 3/4"P 1/8"

    Armstrong

    $198.95
    1AV-3/4 (1/8) Armstrong AIR VENT 3/4"P  1/8". 1-AV—A cast iron air vent that uses a free-floating lever that closes positively, ensuring a leaktight closing under all conditions. This vent is good for low capacity air/gas venting up to 300...
    $198.95
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    $198.95
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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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  • 181525 McDonnell & Miller Relief Valve 250-3/4-50 - 3/4" NPT
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    181525 McDonnell & Miller Relief Valve 250-3/4-50 - 3/4" NPT

    McDonnell & Miller

    $134.95
    181525 McDonnell & Miller Relief Valve 250-3/4-50 - 3/4" NPT. 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)...
    $134.95
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    $134.95
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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

    $442.95
    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...
    $442.95
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    $442.95
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  • 171702 McDonnell & Miller Hi Pressure Level Control 150S
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    171702 McDonnell & Miller Hi Pressure Level Control 150S

    McDonnell & Miller

    $768.95
    171702 McDonnell & Miller Hi Pressure Level Control 150S. McDonnell & Miller 150S Instruction Manual Features and Benefits For commercial and industrial low or high pressure Boiler applications For boilers of any steaming...
    $768.95
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    $768.95
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  • 132800 McDonnell & Miller Water Feeder LWCO 47-2
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    132800 McDonnell & Miller Water Feeder LWCO 47-2

    McDonnell & Miller

    $1,014.95
    132800 McDonnell & Miller Water Feeder LWCO 47-2. Mcdonnell & Miller LWCO Instruction Manual Features: For steam and hot water boilers with cold water feed Continuous maintenance of minimum safe water level, independent of electrical...
    $1,014.95
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    $1,014.95
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  • 120160 McDonnell & Miller FS7-4S - 1-1/4" Flow Switch
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    120160 McDonnell & Miller FS7-4S - 1-1/4" Flow Switch

    McDonnell & Miller

    $748.95
    120160 McDonnell & Miller FS7-4S - 1-1/4" Flow Switch With Stainless Steel Body 120160. Mcdonnell & Miller 120160 Instruction Manual Features: Universal design serves the widest variety of large pipe applications, including heating and...
    $748.95
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    $748.95
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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

    $264.95
    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,...
    $264.95
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    $264.95
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  • 123200 McDonnell & Miller Air Flow Switch Model AF2
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    123200 McDonnell & Miller AF2 Air Flow Switch Model AF2

    McDonnell & Miller

    $284.95
    123200 McDonnell & Miller Air Flow Switch Model AF2. McDonnell & Miller AF1 Flow Switch Instruction Manual For low velocity applications: Paddle fits 8" (203mm) minimum duct size Two electrical knock-outs allow connection from either...
    $284.95
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    $284.95
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  • 122800 McDonnell Miller Air Flow Switch Model AF1
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    122800 McDonnell Miller Air Flow Switch Model AF1

    McDonnell & Miller

    $254.95
    122800 McDonnell Miller Air Flow Switch Model AF1. McDonnell & Miller AF1 Flow Switch Instruction Manual For general purpose applications with medium and high velocity requirements: Paddle fits 8" (203mm) minimum duct size, or 6" (152mm) if...
    $254.95
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    $254.95
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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

    $442.95
    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...
    $442.95
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    $442.95
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  • 172806 McDonnell & Miller 150S-M Combo LWCO & Pump Controller
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    172806 McDonnell & Miller 150S-M Combo LWCO & Pump Controller

    McDonnell & Miller

    $808.95
    172806 McDonnell & Miller 150S-M Combo LWCO & Pump Controller. McDonnell & Miller 150S Instruction Manual Features and Benefits For commercial and industrial low or high pressure Boiler applications For boilers of any steaming...
    $808.95
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    $808.95
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