Hoffman Specialty Water Vent Valves

Bell & Gossett : Steam Specialties : Vents

Model 550 – Part No. 401476 – Air Chamber

  • For use on convectors which are not provided with built-in air chambers or air collection fittings • Brass construction.
  •  1⁄4″ NPT straight shank connection tapped at the top for 1⁄8″ NPT connection
  • 6 cubic inch (98.3cm) volume
  • Maximum water pressure 100 psig (6.9 bar) • Maximum steam pressure 25 psig (1.7 bar)

Model 508 – Part No. 401475 Water Vent Valve

  • For automatic or manual venting systems
  • Ideal for use with Model 550 Air Chamber
  • Disc-type vent
  • Built-in check valve
  • Cartridge with discs can be replaced without draining the system
  • 1⁄8″ NPT straight shank
  • Maximum water pressure 50 psig (3.5 bar) • Maximum pressure 50 psig (3.5 bar)

Model 790 – Part No. 401479 Water Vent Valve

  • For removing air from convectors, baseboard and wall radiation
  • Safety drain connection for discharging moisture
  • Fitting and ferrule for 3⁄16″ (4.8mm) OD tubing
  • Telescopic siphon tube
  • 1⁄8″ NPT straight shank
  • Maximum operating pressure 30 psig (2.1 bar)*
  • Maximum pressure 30 psig (2.1 bar)

Model 791 – Part No. 401482 Water Vent Valve

  • For convectors and small mains
  • Safety drain connection for discharging moisture
  • Fitting and ferrule for 3⁄16″ (4.8mm) OD tubing
  • Telescopic siphon tube
  • 1⁄4″ NPT straight shank
  • Maximum operating pressure 50 psig (3.5 bar)*
  • Maximum pressure 50 psig (3.5 bar)

Model 792 – Part No. 401494 High Pressure Water Vent Valve

  • For releasing air from hot or cold water or glycol mains,hydronic heating and chilling systems, storage and processing tank filters, centrifugal pumps with specific gravity greater than 0.7
  • Cast iron body and cover, stainless steel interior
  • Maximum operating pressure 250 psig (17.3 bar)*
  • Maximum hydrostatic pressure 350 psig (24.2 bar)
  • Maximum temperature 300°F (149°C)

Guidelines

    Catalog Pages

      General Selection Tools:

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      • ESP-PARTS for replacement parts selection
      • CAD Drawings for 2D and 3D dimensional drawings in many formats

      Heat Exchanger Product Selection

      Steam + Water Pressure Reducing Values

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      Bell & Gossett is a leading manufacturer of pumps, valves, heat exchangers, and accessories for plumbing, wastewater, and HVAC—including steam and heat transfer—applications. To build and operate an efficient water system, you need both the right products and experts who know the application. Here, you can access Bell & Gossett’s trusted network of partners who have the experience you need to get the job done right.

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