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2NPS multistage axially split pumps BB3 type, API 610

2NPS
Axially split, multistage, between-bearings process pumps
type ВВ3 (API 610)


DESCRIPTION

2NPS series pumps are intended for handling oil, petroleum products, gas condensate, liquefied hydrocarbon gases, chemicals and other liquids similar by physical properties (specific gravity, viscosity, density) and corrosion impact on the pumps construction materials. The pumps have been designed in full compliance with API 610 standard of the latest edition as the axially split, multistage, between-bearings pumps.


APPLICATION

  • Various industrial processes at refineries and petroleum chemistry plants
  • Transportation of the liquid hydrocarbons via trunk and infield pipelines
  • Multifarious industrial processes at chemical plants and gas processing facilities


TECHNICAL DATA

  • Capacity range: 5 – 240 m³/h
  • Head range: 250900 m
  • Operation pressure: up to 145 kgf/cm2
  • Pumped media temperature: - 80 … + 200 °C
  • Drive power: 55 – 630 kW
  • Rotation speed: 3 000 rpm


DESIGN FEATURES & ADVANTAGES

  • Energy-efficient flow path ensures high performance, low NPSH, and minimal rotor vibration.
  • Replaceable wearing rings of the hard alloy materials significantly extend the operational lifetime of the rotor and stator wearable parts.
  • Rigid stepped shaft with increased diameter eliminates contact between rotating and fixed parts in all operational modes and extends the service life of mechanical seals.
  • Thermal barriers prevent the mechanical seals and bearings from overheating in pumping of high-temperature liquids.
  • Efficient lubrication and cooling system for bearings ensures their long service life.
  • Pump and motor are connected with a steel membrane coupling for low vibration and requiring no maintenance.
  • Bearing housings are rigidly fixed in the casing for quick and reliable alignment of rotor and stator to simplify the maintenance operations.
  • Horizontal split is hermetically sealed by a high-reliable metal-to-metal leakless sealing.
  • Suction and discharge nozzles are designed in accordance with GOST/DIN/ANSI/ ISO for a rated pressure of 160 bar.
  • Special mount of the pump on a rigid welded base plate ensures its free movement at temperature expansion without misalignment of pump and rotor shafts.
  • The mechanical seals installation chambers are fully compliant with API 682. The mechanical seals installation chambers are fully compliant with API 682 and API 610.


SHAFT SEAL

  • Seal chamber, being complaint with API 610 / ISO 13709 requirements, is designed to fit API 682 / ISO 21049 compliant seals of a cartridge type and provides necessary space for tandem and double mechanical seals installation.


MATERIAL OPTIONS


S-5
S-6
S-8
C-6
A-8
D-1
Pressure
casing
Carbon steel (WCB)
Carbon steel (WCB)
Carbon steel (WCB)
12% chromium steel
316L AUS
Duplex steel
Inner
casing
Carbon steel (WCB)
12% chromium steel
316L AUS
12% chromium steel
316L AUS
Duplex steel
Shaft
AISI 4140
AISI 4140
316L AUS
12% chromium steel
316 AUS
Duplex steel
Bearing housing
Carbon steel (WCB)
Carbon steel (WCB)
Carbon steel (WCB)
Carbon steel (WCB)
Carbon steel (WCB)
Carbon steel (WCB)
Impellers
Carbon steel (WCB)
12% chromium steel
316L AUS
12% chromium steel
316L AUS
Duplex steel


PERFORMANCE RANGE

Performance range of 2NPS pump


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