ITT Goulds Pumps
3335 Multi-Stage Pumps (Obsolete)
The Goulds 3335 is a horizontal multistage pump of diffuser (ring-section) construction, originally built for high-pressure boiler feed and general high-head water service. The model is now obsolete and has been superseded by Goulds' current multistage lineup, but many units remain in service.
Product Benefits
- Value in maintenance: For plants that already own a 3335, the value today lies in understanding and maintaining it rather than buying new.
- Proven ring-section design: Its construction, with stacked impellers alternating with diffusers and intermediate bearings on a common shaft, is a proven, robust way to generate high pressure in a compact horizontal package.
- Clear upgrade path: When a unit reaches the end of its economic life, its duty maps naturally onto Goulds' current multistage models, so an upgrade path exists without changing the fundamental pumping concept.
Where It's Used
- High-pressure boiler feed: The 3335 was applied to high-pressure boiler feed.
- High-head water services: It also served general high-head water duties, the classic applications for a small multistage pump.
- Older plant utilities: Units still in operation are typically found in boiler houses and utility areas of older plants.
Good to Know
- Multi-stage construction: The pump was offered in configurations with many stages, with the discharge head threaded into the casing and tandem-mounted angular-contact thrust bearings carrying the axial load.
- Oil lubricated, horizontal: It is oil lubricated and must be installed horizontally.
- Spare-part planning: Because the model is obsolete, owners should assess wear parts early and discuss with Fluindo whether continued maintenance or a move to a current multistage model is the more economical route.
