Plenty and Son

Plenty and Son originated at Eagle Ironworks in Newbury, Berkshire, England, with a founding date of 1800. The business became associated with marine engineering and specialized in the manufacture of marine steam engines. Its early industrial identity was grounded in heavy engineering and the production of equipment for maritime and mechanical applications. In 1928 the company expanded into diesel-engine manufacture under the name Plenty-Still. The diesel operation was located at Kings Road in Newbury. Four years later, in 1932, the diesel-engine business was separated from Plenty and established as the Newbury Diesel Company, commonly abbreviated as NDC. NDC produced diesel engines marketed under the Sirron name. The name was derived by spelling Norris backwards, a reference to Henry Kent Norris, who was prominent in the company. Sirron engines were used in marine service, including aboard the MV Balmoral. The Newbury Diesel Company followed a distinct corporate path after its separation. In 1936 it became a wholly owned subsidiary of the shipping company F. T. Everard and Sons. In 2006–2007, F. T. Everard and Sons was acquired by James Fisher & Sons and became James Fisher Everard. This later ownership history relates to the former diesel-engine business rather than demonstrating that the Newbury Diesel Company remained part of Plenty and Son. Plenty underwent a significant ownership transition around 1970 when it was acquired by Booker McConnell. By 1977, the company had become part of the Booker Group’s fluid engineering division. Its products at that stage included pumps and associated equipment supplied to the oil industry. This shift reinforced Plenty’s role as an industrial fluid-engineering supplier and broadened its relevance beyond its earlier marine-steam-engine heritage. In 2001, SPX FLOW acquired Plenty. The brand subsequently operated within SPX FLOW’s industrial equipment portfolio. By 2017, reference material identified three Plenty divisions: Plenty Filters in Newbury, Plenty Mixers in Manchester and Plenty Pumps in Glasgow. These divisions represented the company’s main contemporary product areas and showed the continuing use of the Plenty name across filtration, mixing and pumping technologies. Plenty’s history is consequently characterized by several connected but distinguishable phases: nineteenth- and early twentieth-century engineering at Newbury; specialization in marine steam engines; a short-lived or separately organized diesel-engine branch that became the Newbury Diesel Company; expansion into industrial pumps and oil-industry equipment; and integration into SPX FLOW as a specialist fluid-handling brand. Reference material further states that in May 2026 an announcement was made that the company would cease operations beginning June 6, 2026. The available information does not establish whether all operations had ceased, whether the brand would be retained by SPX FLOW, or whether individual product lines would continue under another organizational structure. The brand’s current status is therefore recorded as unknown.

• 2026

  Operations announced for cessation

  [1]Plenty and Sonen.wikipedia.org

  In May 2026, it was announced that Plenty and Son would cease operations beginning June 6, 2026.

• 2017

  Three operating divisions identified

  [1]Plenty and Sonen.wikipedia.org

  Reference material identified Plenty Filters in Newbury, Plenty Mixers in Manchester and Plenty Pumps in Glasgow.

• 2001

  Acquisition by SPX FLOW

  [1]Plenty and Sonen.wikipedia.org

  SPX FLOW acquired Plenty, bringing the brand into its industrial fluid-handling portfolio.

• 1977

  Integration into Booker’s fluid engineering division

  [1]Plenty and Sonen.wikipedia.org

  By 1977, Plenty had become part of the Booker Group’s fluid engineering division and supplied pumps and related equipment to the oil industry.

• 1970

  Acquisition by Booker McConnell

  [1]Plenty and Sonen.wikipedia.org

  Around 1970, Plenty and Son was acquired by Booker McConnell.

• 1936

  Newbury Diesel Company becomes an Everard subsidiary

  [1]Plenty and Sonen.wikipedia.org

  The Newbury Diesel Company became wholly owned by the shipping company F. T. Everard and Sons.

• 1932

  Newbury Diesel Company established

  [1]Plenty and Sonen.wikipedia.org

  The diesel-engine business was separated from Plenty and became the Newbury Diesel Company, which produced the Sirron range.

• 1928

  Diesel-engine manufacture begins under Plenty-Still

  [1]Plenty and Sonen.wikipedia.org

  The company began manufacturing diesel engines under the Plenty-Still name at Kings Road in Newbury.

• 1800

  Company founded at Eagle Ironworks

  [1]Plenty and Sonen.wikipedia.org

  Plenty and Son was founded at Eagle Ironworks in Newbury, Berkshire, establishing the engineering business whose name later became associated with marine engines and industrial fluid-handling equipment.

A long-established British industrial engineering brand focused on engineered fluid-handling and process equipment, with historical expertise in marine engines and later activity in pumps, filtration and mixing systems.

• Marine engineering

  Marine steam engines

  Marine steam engines were a defining historical specialty of Plenty and Son. They represent the company’s early engineering heritage and its original association with maritime propulsion and heavy mechanical equipment.

• Diesel engines · 1928

  Plenty-Still diesel engines

  Beginning in 1928, Plenty manufactured diesel engines under the Plenty-Still name at its Kings Road premises in Newbury. The diesel activity was separated in 1932 and became the Newbury Diesel Company, so these engines should be treated as part of the brand’s associated historical product development rather than necessarily as a continuing Plenty line.

• Marine and industrial diesel engines · 1932

  Sirron diesel engines

  The Sirron range was produced by the separate Newbury Diesel Company after the diesel business was detached from Plenty in 1932. The name was Norris spelled backwards, and Sirron engines were used in marine applications, including on the MV Balmoral.

• Industrial pumps

  Plenty Pumps

  Plenty Pumps formed one of the company’s identified operating divisions and supplied pumping equipment within the broader fluid-engineering portfolio. The business was associated with industrial customers, including the oil industry, and with engineered rather than consumer-oriented applications.

• Industrial filtration

  Plenty Filters

  Plenty Filters was identified as a Newbury-based division in the 2010s. It represented the brand’s specialization in filtration equipment for industrial fluid and process applications.

• Industrial mixing equipment

  Plenty Mixers

  Plenty Mixers was identified as a Manchester-based division. Its activities extended the brand’s process-engineering offer into industrial mixing equipment used in fluid and manufacturing systems.

• 2026

  Announcement of operational cessationStrategy

  Background

  Reference material states that the company’s operations were scheduled to end in 2026.

  Action taken

  In May 2026, an announcement stated that Plenty and Son would cease operations beginning June 6, 2026.

  Aftermath

  The available material does not confirm whether the cessation was completed, how the individual divisions were handled, or whether the brand continued under SPX FLOW.

  Source

• 2001

  Acquisition by SPX FLOWM&A

  Background

  Plenty was operating as an industrial fluid-engineering business with capabilities spanning pumps and related process equipment.

  Action taken

  SPX FLOW acquired Plenty and incorporated the brand into its industrial equipment portfolio.

  Aftermath

  The Plenty name continued across pump, filtration and mixing activities, including divisions identified in Newbury, Manchester and Glasgow.

  Source

• 1970

  Acquisition by Booker McConnellM&A

  Background

  Plenty entered a new ownership phase as industrial engineering and fluid-handling activities were consolidated within larger corporate groups.

  Action taken

  Booker McConnell acquired Plenty and subsequently incorporated it into the Booker Group’s fluid engineering division.

  Aftermath

  By 1977, the business supplied pumps and related equipment to the oil industry.

  Source

• 1928

  Entry into diesel-engine manufactureProduct launch

  Background

  Plenty expanded beyond its established marine steam-engine activities during a period when diesel power was becoming important in marine and industrial applications.

  Action taken

  The company began manufacturing diesel engines under the Plenty-Still name at Kings Road in Newbury.

  Aftermath

  The diesel activity was separated from Plenty in 1932 and became the Newbury Diesel Company, which later produced Sirron engines.

  Source

1. 1Plenty and Sonen.wikipedia.org