Steam Heating
Air Vents

Hoffman Specialty Steam Heating

Literature, diagrams and more information for Steam Heating
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  1. Hoffman Specialty 401422 model 1A radiator steam vent.
    List Price $90.00 $62.31  / each
    SKU: HK1005
    21 in stock
    Hoffman Specialty 401422 model 1A radiator steam vent air valve (non-vacuum) with 1/8" male NPT angle connection and 10 psi maximum pressure. The maximum operating pressure against which the vent can open is 1.5 psi. This float-type vent has an adjustable port for true proportional venting - 6 port settings from slow (1) to fast (6). Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401422
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    List Price $90.00 $62.31  / each
  2. Hoffman 401425 - Air Vent for One-Pipe Steam, No. 1B
    List Price $137.00 $94.85  / each
    SKU: HK1007
    Ships within 2 business days
    Hoffman 1B steam radiator vent, float type, 1/4"NPT straight 1-1/2lb maximum, with adjustable 6 port settings. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401425
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    List Price $137.00 $94.85  / each
  3. Hoffman Specialty 401419 model 3 steam air line vent.
    List Price $265.00 $183.46  / each
    SKU: HK1010
    Hoffman 3 steam air line valve, thermostatic (no float), 1/8"NPT inlet x 1/4"NPT outlet 25lb maximum, for air line or Paul systems. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401419
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    This item is obsolete.
  4. Hoffman 401416 - Air Vent for Steam Processing Equipment, No. 4
    List Price $143.00 $99.00  / each
    SKU: HK1015
    Ships within 2 business days
    Hoffman 4 steam quick valve, thermostatic (no float), 1/2"NPT female x 3/4"NPT male 25lb maximum, for Process equipment, operates on temperature change only, does not close against water, must be installed 6-10" above return and 18" above boiler water line. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401416
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    List Price $143.00 $99.00  / each
  5. Hoffman Specialty 401413 model 4A main steam vent.
    List Price $103.00 $71.31  / each
    SKU: HK1020
    4 in stock
    Hoffman 4A air valve non-vacuum, float type, 1/2"NPT female x 3/4"NPT male 2lb maximum, for residential or small one or two pipe systems, must be installed 6-10" above return and 18" above boiler water line. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401413
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    List Price $103.00 $71.31  / each
  6. Hoffman Specialty 401440 model 40 steam radiator vent.
    List Price $52.00 $34.67  / each
    SKU: HK1025
    19 in stock
    Hoffman 40 steam radiator vent, float type, 1/8"NPT angle 10lb maximum, single non-adjustable port for one pipe systems that do not require proportional venting. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401440
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    List Price $52.00 $34.67  / each
  7. Hoffman 401455 - Air Vent for One-Pipe Steam, No. 41
    List Price $80.00 $55.38  / each
    SKU: HK1030
    10 in stock
    Hoffman 41 convector steam vent, non-vacuum, float type, 1/8"NPT straight shank, 10lb maximum, single non-adjustable port. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401455
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    List Price $80.00 $55.38  / each
  8. Hoffman 401458 - Air Vent for One-Pipe Steam, No. 43
    List Price $86.00 $59.54  / each
    SKU: HK1035
    Ships within 2 business days
    Hoffman 43 convector steam vent, non-vacuum, float type, 1/4"NPT straight shank, 10lb maximum, single non-adjustable port. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401458
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    List Price $86.00 $59.54  / each
  9. Hoffman 401461 - Air Vent for One-Pipe Steam, No. 45
    List Price $94.00 $65.08  / each
    SKU: HK1040
    Ships within 2 business days
    Hoffman 45 convector steam vent, non-vacuum, float type, 1/2"NPT female x 3/4"NPT male straight shank, 10lb maximum, single non-adjustable port. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401461
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    List Price $94.00 $65.08  / each
  10. Hoffman Specialty 401443 model 70A radiator steam vent.
    List Price $144.00 $99.69  / each
    SKU: HK1050
    11 in stock
    Hoffman 70A steam radiator vent, float type, 1/8"NPT angle 15lb maximum, single non-adjustable port for one pipe systems that do not require proportional venting. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401443
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    List Price $144.00 $99.69  / each
  11. Hoffman 401470 - Air Vent for One-Pipe Steam, No. 71A
    List Price $165.00 $114.23  / each
    SKU: HK1052
    Ships within 2 business days
    Hoffman 71A convector steam vent, non-vacuum, float type, 1/8"NPT straight shank, 15lb maximum, single non-adjustable port. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401470
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    List Price $165.00 $114.23  / each
  12. Hoffman 401464 - Air Vent for One-Pipe Steam, No. 71B
    List Price $140.00 $96.92  / each
    SKU: HK1052B
    Ships within 2 business days
    Hoffman 71B convector steam vent, non-vacuum, float type, 1/4"NPT straight shank, 15lb maximum, single non-adjustable port. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401464
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    List Price $140.00 $96.92  / each
  13. Hoffman Specialty 401467 model 71C convector steam vent.
    List Price $150.00 $0.00  / each
    SKU: HK1052C
    Hoffman 71C convector steam vent, non-vacuum, float type, straight shank, dual thread 1/2" female x 3/4" male 15lb maximum, single non-adjustable port. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401467
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    This item is obsolete.
  14. Hoffman 401429 - Air Vent for Steam, No. 74
    List Price $250.00 $173.08  / each
    SKU: HK1055
    5 in stock
    Hoffman 74 steam unit heater vent, non-vacuum, float type, 1/2"NPT female x 3/4"NPT male straight shank, 35lb maximum, single non-adjustable port. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401429
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    List Price $250.00 $173.08  / each
  15. Hoffman Specialty 401434 model 75 main vent air valve.
    List Price $235.00 $162.69  / each
    SKU: HK1060
    15 in stock
    The Hoffman Specialty 401434 is a model 75 main steam vent air valve (non-vacuum) for low pressure. This float-type thermostatic vent has a 1/2" NPT female and a 3/4" NPT male straight shank. The maximum steam pressure is 15 psi, and the maximum operating pressure (the maximum pressure against which the vent can open) is 3 psi. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401434
    List Price $235.00 $162.69  / each
  16. Hoffman Specialty 401437 model 75H steam air valve.
    List Price $250.00 $173.08  / each
    SKU: HK1065
    4 in stock
    Hoffman 75H steam main vent, non-vacuum, float type, 1/2"NPT female x 3/4"NPT male straight shank, 15lb maximum, single non-adjustable port. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401437
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    List Price $250.00 $173.08  / each
  17. Hoffman Specialty 4014322 model 76 vacuum main vent valve.
    List Price $395.00 $273.46  / each
    SKU: HK1070
    7 in stock
    Hoffman 76 steam main vent, vacuum valve, float type, 1/2"NPT female x 3/4"NPT male straight shank, 15lb maximum, for medium and large one-piipe vacuum systems, must be installed 6-10" above return and 18" above boiler water line. Learn More
    • Manufacturer : Hoffman Specialty
    • Part Number : 401432
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    List Price $395.00 $273.46  / each
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