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125252, Moscow, 12 Aviakonstructor Mikoyan street
Phone: +7 (495) 664-81-71, fax: +7 (495) 664-81-72 |
CNSDp
Double-casing, radially split, multistage
between-bearings pumps, BB5 type (API 610)
DESCRIPTION
CNSDp pumps are horizontal, double-casing, radially split, multistage, between-bearings pumps of a BB5 type (barrel pumps), in full compliance with ANSI/API standard 610 (ISO 13709:2009).
APPLICATION
- Water injection into reservoirs to maintain formation pressure
- High-pressure oil refining processes
- Various applications in petrochemical and gas processing industry
- Gas condensate treatment units
TECHNICAL DATA
- Capacity: up to 1840 m³/h
- Head: up to 2800 m
- Pressure: up to 300 bar
- Max temperature: + 400 °C
MATERIALS
Duplex steel (D-1 class according to API 610 11-th Ed.)
| Super Duplex steel (D-2 class according to API 610 11-th Ed.)
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- Pressure casing: duplex steel GX2CrNiMoCuN-25-6-3-3
- Inner case parts: duplex steel GX2CrNiMoCuN-25-6-3-3
- Shaft: duplex steel X2CrNiMoN-22-5-3
- Wear rings parts: hard-faced duplex steel
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- Pressure casing: super duplex steel GX2CrNiMoN-26-7-4
- Inner case parts: super duplex steel GX2CrNiMoN-26-7-4
- Shaft: super duplex steel X2CrNiMoCuWN-25-7-4
- Wear rings parts: hard-faced super duplex steel
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DESIGN FEATURES
- The pump rotor is hydraulically unloaded by the oppositely arranged impellers fixed on the shaft by their press fit, embedded rings and shaft keys.
- The outer casing is engineered and rated for the maximum allowable working pressure (MAWP).
- Suction and discharge nozzles are directed vertically upwards. The pump supports are located on a centerline. The inner casing of a cartridge type consists of the radially split sections with metal-to-metal sealing and additional rubber rings completely eliminating internal circulation of the liquid. Due to a cartridge design the inner casing can be replaced on the site of operation without dismantling the outer casing.
- The pump rotor is supported by the segmented bearings with forced lubrication system.
- The residual axial force arising as a result of uneven wear of impellers' seals during operation is accepted by the Mitchell type thrust bearing with self-aligning pads and leveling system.
- An oil pump of the lubrication system can be optionally installed on the main pump shaft.
- The rotor sealing can be either single or double mechanical type in accordance with API 682. Pressure in the sealing system is maintained by a hydraulic accumulator. The impeller of a mechanical sealing provides circulation of the barrier fluid that is cooled in a heat exchanger. The pump is connected with a drive through the elastic diaphragm coupling.
PUMPED MEDIA
Highly-corrosive seawater, stratal water and waste water (including the fluids containing hydrogen sulfide):
- Density, kg /m3: up to 1180
- Max size of solid particles, mm: 0.2
- рH value: 4 ... 9
- Oil content, mg/L: up to 200
- H2S content, mg/L: up to 400
OPERATIONAL INTERVALS AND LIFETIME
Depending on the pumped media the average operational lifetime amounts to:
- Mean time between overhauls (MTBO): over 40000 hours
- Casing parts service life: over 30 years
PERFORMANCE RANGE
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