CPE

Summary

Product Identification

The Sulzer CPE series consists of end-suction single-stage centrifugal pumps designed to ASME B73.1 standards. These pumps are engineered to exceed the U.S. Department of Energy (DOE) regulations taking effect in 2020, meeting or exceeding the Pump Energy Index (PEI) values.

Main Applications

CPE process pumps are suitable for a variety of industrial applications, including:

• Clean or slightly contaminated liquids
• Viscous liquids of up to 3’000 cSt
• Fibrous slurries of up to 6% consistency

Target industries include:

• Hydrocarbon processing
• Oil and gas
• Power generation
• Pulp, paper and board
• General industry
• Water and wastewater
• Chemical process industry

Operating Limits

The performance range for CPE pumps is as follows:

60 Hz Operation

• Capacities: up to 7’000 USgpm
• Heads: up to 900 ft
• Pressures: up to 400 psi
• Temperatures: up to 500°F
• Maximum speed of rotation: up to 3’600 rpm

50 Hz Operation

• Capacities: up to 1’650 m³/h
• Heads: up to 275 m
• Pressures: up to 27.5 bar
• Temperatures: up to 260°C
• Maximum speed of rotation: up to 3’000 rpm

General Operating Data

• Liquid Temperature: up to 500°F / 260°C
• Pressure: up to 400 psi / 27.5 bar
• Corrosion pH: from 0 to 14

Materials of Construction

Sulzer offers a variety of material options for optimal pump life, especially in aggressive processes.

Stainless Steel Design (Nominal chemical composition %)

• Duplex
  • ASTM A890 3A (CD6MN) (41): C max 0.06, Cr 24.0-27.0, Ni 4.0-6.0, Mo 1.75-2.5, N 0.15-0.25
  • ASTM A890 1B (CD4MCuN) (4L): C max 0.04, Cr 24.5-26.5, Ni 4.7-6.0, Mo 1.7-2.3, Cu 2.7-3.3, N 0.10-0.25
  • ASTM A890 5A (CE3MN) (4T): C max 0.03, Cr 24.0-26.0, Ni 6.0-8.0, Mo 4.0-5.0, N 0.10-0.30
• Austenitic
  • ASTM A743 (CN-7M) (43): C max 0.07, Cr 19.0-22.0, Ni 27.5-30.5, Mo 2.0-3.0, Cu 3.0-4.0
  • AVESTA 654 SMO® (4U): C max 0.025, Cr 23.0-25.0, Ni 21.0-23.0, Mo 7.1-7.5, Cu 0.3-0.7, N 0.45-0.55
• Martensitic
  • ASTM A747 (CB7Cu-2 H900) (4E): C max 0.07, Cr 14.0-15.5, Ni 4.5-5.5, Cu 2.5-3.2
• Nickel alloy
  • ASTM A494 (CW-6M) (4J): C max 0.07, Cr 17.0-20.0, Ni balance, Mo 17.0-20.0

Carbon, Low-Alloy Cast Steel, Cast Iron Design (Nominal chemical composition %)

• Ductile iron
  • ASTM A395 60-40-18 (5H)

Material alternatives for other parts

• Gasket material
  • Aramid fiber-elastomer (Y6): Used in temperature range -40°C/-40°F...+160°C/+320°F and pH 2-12
  • PTFE/Glass (84): Used in temperature range -190°C/-310°F...+240°C/+464°F and pH 0-14
  • Flexitallic™ Sigma 511: Used in temperature range up to +260°C/+500°F
• O-ring material
  • EPDM (92): Used in temperature range -58…+300°F/ -50...+150°C
  • PTFE (94): Used in temperature range -325…+500°F/ -200...+260°C

Key Design Features

• Impeller: High-efficiency, low NPSHr (Net Positive Suction Head required) design with patent-pending balancing holes. Available in semi-open (for clean, fibrous, and viscous liquids) and closed (for clean and viscous liquids) options. Optimized for low-flow applications (down to 5% of BEP flow) with optional flow straightener.
• Shaft Sealing:
  • Types: Single and double mechanical seals (with various flushing options), gland packing (for light-duty applications), and Sulzer dynamic seal (for positive pump inlet head and temperature below boiling point).
  • Chamber Options: Standard bore, Tapered bore, Large bore (oversized for reduced running temperatures), and Universal bore.
• Bearing Unit: Heavy-duty, oversized bearing design exceeding ASME B73.1 requirements. Available with oil bath or grease lubrication. Features a magnetic drain plug and non-contacting bearing protection isolators. Shaft deflection at sealing is minimized to less than 0.002 in / 0.05 mm.
• Impeller Clearance Adjustment: Externally adjustable to restore pump efficiency without removing the pump from piping.
• Baseplate Options: Standard, Drip-lip, PIP, Non-metallic (polymer composite), and API baseplates are available, designed for easy installation and reduced vibration. Riser blocks allow for larger motor frames.
• General Design: Robust overhung shaft (duplex stainless steel standard), back pull-out design for easy servicing, flexible coupling with spacer, and guards for rotating parts.

Standardization and Service

• High Standardization: The CPE range uses common modules and components for maximum interchangeability, including 40 wet-end hydraulics, 2 impeller types, 4 shaft seal bore types, 3 shaft seal sizes, and 3 bearing unit sizes.
• Interchangeability: CPE pumps are interchangeable with older Sulzer CPT pumps. CPE hydraulics can be installed on existing CPT bearing units, and CPE bearing units are fully interchangeable with existing CPT bearing units.
• Service Kits: Tailored service kits are available for impeller, bearing unit, dynamic seal, and gland packing service, containing all necessary parts in one package.

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

Official datasheet (PDF)

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