HM

ВВ4/5

Designed for transporting crude oil and refined oil products through long-distance pipelines. НМ 65…НМ 1250-400 –electrically driven, horizontal, between-bearings, multistage diffuser centrifugal pumps of segmental or barrel (in case of НМ 500-800 and НМ 1250-400) type with a withdrawable cartridge of ring-section type. Single flow impeller arrangement, with all the impellers facing the same way. The pump rotor is carried by the plain bearings with forced oil lubrication. Shaft sealing: by mechanical seals. The pumps can be arranged both in series and in parallel.

ВВ1

Designed for transporting crude oil through long-distance pipelines. НМ 1250-260…НМ 10000 – electrically driven, horizontal foot-mounted, between-bearings, single-stage, axially split volute casing centrifugal pumps with a НМ 10000-210-21double entry radial impeller. The rotor is carried by the pressure oil lubricated plain bearings. The residual rotor axial thrust is absorbed by an angular-contact ball bearing (optional hydrodynamic axial plain bearing). Shaft sealing: basically by single mechanical seals, each provided with an auxiliary (safety) seal (a floating throttle bushing) on the atmosphere side; optional dual mechanical seals with a barrier fluid sealing system.

Additional and technical information.