ERPN Overhung Centerline Mounted API Process Pump

The ERPN is the pump of choice for severe chemical, petrochemical, refining and heavy-duty industrial service where full compliance with API 610 is not required. This pump provides users with the important mechanical, hydraulic, emissions control and safety components required by the latest ISO 13709/API 610 standards.

ERPN Overhung Centerline Mounted API Process Pump Applications

ERPN Pump Features & Benefits

• API-Compliant Design – Engineered to incorporate the critical safety, hydraulic, and emissions control components specified by ISO 13709/API 610 standards.

• Centerline Mounted Pump Casing – Provides excellent thermal stability and accommodates nozzle loads per API 610 design requirements, reducing misalignment in high-temperature services.

• Precision Cast Impeller – A dynamically balanced overhung impeller pump ensures smooth operation and minimal vibration across a wide flow range.

• Flexible Sealing Options – Seal chamber meets ISO 21049/API 682 standards, supporting dual pressurized and unpressurized cartridge seals for severe services.

• Semi-Open Impeller & High-Pressure Versions – Available for demanding chemical and refining processes.

• Heavy-Duty Flanges – Supplied to ASME B16.5 Class 300 RF standards, with Class 600 RF optional.

Applications of the ERPN API Process Pump

The ERPN overhung process pump is suitable for:

• Solvents and polymers

• Waste processing and slurry transfer

• Caustic and chlor-alkali

• Acid transfer

• VOC handling and distillation (oil and gas)

• Drilling and production services

• Offsites and waste treatment

• Paper stock circulation

• Auxiliary power generation services

Industries Served

• Oil & Gas

• Chemical Processing

• Pulp & Paper

• Power Generation

Technical Specifications of the Flowserve ERPN Pump

• Flow: up to 1100 m³/h (4800 gpm)

• Head: up to 230 m (750 ft)

• Pressure: up to 60 bar (870 psi)

• Temperature: up to 350 °C (660 °F)

FAQ

Q1: What is the Flowserve ERPN pump?
The ERPN is a centerline mounted overhung process pump designed to meet API 610 standards. It is used in high-temperature, heavy-duty industrial applications where thermal stability and reliability are essential.

Q2: What is an overhung pump?
An overhung pump has an impeller mounted on the end of the shaft, supported by bearings outside the pump casing. This design simplifies maintenance and is common in API process pumps like the ERPN.

Q3: What is the advantage of a centerline mounted pump?
A centerline mounted centrifugal pump minimizes misalignment caused by thermal expansion, making it ideal for high-temperature services in oil, gas, and chemical plants.

Q4: Where are ERPN overhung pumps used?
ERPN pumps are widely applied in chemical transfer, distillation, polymers, acid handling, slurry processing, and auxiliary power services across industries like oil & gas, power generation, pulp & paper, and chemical processing.

Q5: How does an overhung impeller pump differ from other centrifugal pumps?
Unlike foot-mounted pumps, an overhung impeller pump like the ERPN offers higher reliability under nozzle loads, easier access for maintenance, and superior performance in high-pressure and high-temperature environments.