The Bell & Gossett Triple Duty® Valve is a combination valve that provides all of the functions normally required on the discharge side of hydronic pump systems. The design combines three valves into one: a calibrated balance valve, a spring loaded check valve, and an isolation/shut-off valve. The combination of multiple valves helps save space and reduces installation time and money.

All Triple Duty® Valves features a calibrated nameplate designed to allow you to accurately balance your system and throttle excess flow. Model 3DV valves utilize a calibrated ball valve design that also provides complete shut-off. The larger Model 3D and 3DS valves utilize a disc style globe valve design that also features a soft seat design that provides complete shut-off and prevents valve chatter. Additionally all valves feature a memory stop or memory button to allow you to return the valve to its set position after shut-off. All B&G Triple Duty® Valves also include a spring loaded check valve to prevent backflow and gravity circulation.

Model 3DV Triple Duty® Valves are manufactured with a brass body, chrome plated brass ball, and glass filled Noryl check valve with a stainless steel spring. They include two extended P/T valves and extended stem to allow for ease of installation in insulated systems, and include a choice of FNPT or rotatable flange inlet connection. They are available in sizes 1” through 2” and are suitable for up to 200 psi and 250°F. Model 3D (angle pattern) and 3DS (straight pattern) valves are manufactured with iron bodies, brass discs with EPDM seats, and stainless steel springs. They are available in sizes 2” – 16”, feature flanged and grooved end connections, and are suitable for either 175 psi (flanged) or 300 psi (grooved) pressure and 250°F.

Features and Benefits

Combines 3 valves in 1, saving time and money

  • Calibrated balance valve with nameplate and memory stop/button
  • Spring loaded check valve
  • Isolation/Shut-off valve

Wide range of sizes and connections

  • Straight Pattern Flanged: 2” – 14”
  • Straight Pattern Grooved: 2” – 12”
  • Balanced Straight Pattern Flanged: 3” – 16”
  • Angle Pattern Flanged: 2” – 10”
  • Model 3DV FNPT and Rotatable Flange: 1” – 2”

Excellent Cv range

  • From 9 to 3,225

Models (see Brochure A-631 for dimensions & weights)

NPT Male:
3DV-1NMF
3DV-1¼NMF
3DV-1½NMF
3DV-2NMF

Rotatable Flange:
3DV-1RFF
3DV-1¼RFF
3DV-1½RFF
3DV-2RFF

Bell & Gossett offers several useful engineering tools for easy sizing of every area of a building. Simple to navigate software gives you accurate information and up-to-date documentation downloadable straight into your submittal package.
Some tools require a registered account: New User Registration | Existing User Password Help
ESP-Design PlusBell & Gossett: Multi-Stage, Pressure Booster Packages, Wastewater, Vertical Turbines
ESP-PlusBell & Gossett Pump Selection: Circulators, End Suction, Closed-Coupled, Inline, Double Suction
ESP-TanksBell & Gossett Compression/Expansion Tanks and Accessories (downloadable app)
ESP-ThermalBell & Gossett Gasket Plate & Frame and, Brazed Plate Heat Exchangers
ESP-UTUBEBell & Gossett U-Tube Heat Exchangers
ESP-PartsParts Selection
Steam-2000Steam 2000 Selection
Steam-1140Series 1140 Steam Service Regulators
Water-1140Series 1140 Water Service Regulators
Steam-TrapsSteam Traps Selection
CAD DrawingsCAD Drawings
System SyzerSystem Syzer (available online, PC download, and iOS app)
System Syzer PsychrometrySystem Sizing related to coil cooling (link downloads .exe file)
Steam-PipeSteam Pipe Sizing
Steam-LossSteam Loss Through Failed Trap
Flash-SteamFlash Steam Sizing
Condensate-PipeCondensate Pipe Sizing
Mobile Catalog iOSiPhone & iPad Mobile Product Catalog
Mobile Catalog AndroidAndroid Device Mobile Product Catalog

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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