Single Stage end suction pumps PRE, PRE-LF

Summary

Product identification

The PRE and PRE-LF are single stage end suction process pumps, designed to ISO 13709 (API 610) type OH2.

Main applications include:

• Hydrocarbon processing facilities: Synfuels, Refining, Gas processing, Petrochemicals, Polyolefins, Nitrogenous fertilizer, Auxiliary services.
• Fossil and renewable power plants: Boosters, Boiler / hot water circulation (PRER, PRETR), Heat transfer fluid, Condensate extraction, Auxiliary services.

The PRE product range utilizes an innovative, high efficiency impeller design with several configurations:

• Traditional closed impeller: Typically used with clean fluids.
• Barske design: For optimized performance at low flow (utilized by PRE-LF).
• Open and semi-open with wear plate: For slurry applications.
• Closed impeller with relief vanes: For abrasive applications.

Design variants:

• PRE-K / PRE-SF: Special design for slurry applications, suitable for corrosive and/or abrasive applications. PRE-K for small size pumps (open impeller), PRE-SF for large size pumps (semi-open impeller with wear plate).
• PRE-CF: Special design for slurry applications, suitable for corrosive and/or abrasive applications, with HVOF coating option for extended life in severely abrasive services.
• PRER / PRETR: High pressure special design variants using PRE hydraulics with special reinforcement for challenging high-pressure services. 16 standard sizes available.
• PRE-LF: Features Barske impeller design for optimized performance at low flow, with precision impeller and casing machining for operation close to the BEP (best efficiency point) with a wide operating range.

Operating limits

• Capacities: up to 4,500 m³/h (19,800 USgpm)
• Heads: up to 320 m (1,050 ft)
• Pressures: up to 60 bar (1,100 psi)
  • PRER: up to 100 bar (1,450 psi)
  • PRETR: up to 200 bar (2,900 psi)
• Temperatures: from -90 to 400°C (from -130 to 752°F)

Mechanical / hydraulic

• Casing: Robust pressure casing.
• Nozzles: 300# RF flange rating is standard, with optional 600# RF available. PRER and PRETR are available with higher flange class ratings and higher design pressure.
• Impeller:
  • Enclosed impeller on standard PRE design for efficiency.
  • Special designs available for slurry duty including corrosive and/or abrasive applications.
  • PRE-LF utilizes unique semi-open impeller for low flow and high head.
  • Optional inducer provides option to meet low NPSHa requirements.
• Shaft: Extra heavy duty, large diameter shaft. Standard heavy-duty shaft limits deflection to less than 0.05 mm (0.002 in) at the seal chamber for long seal life.
• Bearings:
  • Standard 7300 series 40° duplex angular contact thrust bearings with machined brass cages.
  • Heavy duty roller radial bearings are standard.
  • Optional tapered roller thrust bearing for very high suction pressures.
• Bearing housing: Carbon steel construction with cooling fins for improved heat dissipation. Low noise fan added for high ambient or high product temperatures. Water cooling is optional for special applications.
• Lubrication options: Splash oil, ring oil, purge mist, or pure mist.
• Seal chamber: API 682 mechanical seal and API 610 seal chamber for improved seal environment and life.
• Case cover options: Cooling / heating chamber in casing cover available for specific applications.
• Materials: API 610 material codes S-4, S-5, S-6, S-8, S-9, C-6, A-8, D-1, D-2, 317L. Other materials available on request.

Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the official OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror