DPAS Horizontal-split-case

Summary

Product identification

The DPAS C series consists of split case double suction centrifugal pumps.

The model key provides a detailed designation system:

• DPAS: Pump series horizontal split case
• Casing material:
  • C = Cast iron GG25 (DP standard)
  • D = Nodular Cast Iron GGG40
  • E = Cast Bronze G-CuSn 10
  • F = Chrome Nickel Steel X5 Cr Ni 18.9
  • G = Chrome Nickel Molybdenum Steel X5 Cr Ni Mo 18.10
• Pump type: Size discharge connection PN16
• Nominal diameter impeller: In mm
• Reduced diameter impeller: In mm
• Motor speed: 2P-50 Hz, 4P-50Hz, 2P-60 Hz, 4P-60 Hz (xx = bare shaft)
• Motor power P2: In kW
• Impeller material:
  • - = GG25 - DP standard
  • D = Nodular Cast Iron GGG40
  • E = Cast Bronze G-CuSn 10
  • F = Chrome Nickel Steel X5 Cr Ni 18.9
  • G = Chrome Nickel Molybdenum Steel X5 Cr Ni Mo 18.10
• Mechanical seal (Burgmann):
  • - = MG1 DP standard
  • K = M7N - M74N - M78N
  • L = M3N - M32N - M37N - M37GN
  • M = HJ92 - HJ977N - SHJ97G
  • N = BT-AR
  • X = special

Operating limits

• Shaft Seal Pressure: p = 12 bar
• Shaft Seal Temperature: t = -20 ...120 °C

Feed water

• Pumped Liquids: Thin, clean, non-aggressive and non-explosive liquids free from large solid particles or fibres.
• Operating Temperature: Curves are valid for 20 °C clean water.

Electrical

DPAS series pumps utilize B5 flanged, IP 55 electric motors compliant with IEC standards. These motors are suitable for inverter usage according to IEC 60034.

Detailed motor data for 50Hz 2-pole and 4-pole configurations, including power, nominal current (Inom), starting current ratio (Ia/In), power factor (Cos phi), efficiency (Eff), motor voltage, rotational speed (n), IEC connection type, mass, and sound pressure level, is available in the official PDF.

Mechanical / hydraulic

• Design:
  • Single-stage axially split casing pumps with double entry and radial impeller.
  • Double entry, closed impeller is hydraulically thrust compensated.
  • Lower casing features an in-line design with suction and discharge nozzles on the same line.
  • Upper casing is self-aligning and easy to mount.
  • Double suction impeller reduces NPSH values, allowing for high suction lifts.
  • Short shaft design enables compact and rigid pumps for mechanical seal applications.
  • Pump and motor are separate components, connected via a flexible coupling and mounted on a base plate.
• Bearings:
  • For pump groups A, B, and C: Ball bearings are installed at both the dead and drive ends of the pump.
  • For pump groups D, E, and F: A cylindrical roller bearing is installed at the drive end, and a ball bearing at the dead end.
• Shaft Seal:
  • Standard: Burgmann MG1
  • Type: Single Seal, Unbalanced, Elastomer Bellows
  • Rotation: Independent on direction of rotation
  • *Different types of mechanical seals are available.
• Materials (Standard):
  • Casing: 0.6025 / GJL-250
  • Impeller: 0.6025 / GJL-250
  • Shaft: 1.4021 / X20 Cr 13
  • Casing wear ring: 2.1050.01 / G-Cu Sn 10
  • Gland: 0.7040 / GJS-400-15
  • Bearing housing and cover: 0.6025 / GJL-250
  • *Different materials for pump casing, impeller, shaft and wear ring are available.
• Dimensions: Detailed dimensions for various DPAS models, including DNs, DNd, Lp, e, f, h1, h2, Hp, A, B, G, b, m1, m2, n1, n2, s, l, and d in millimeters, are provided in the official PDF.
• Specifications: Specific performance data (Impeller diameter, P2 power, Pump mass, Part number) for various DPAS models (e.g., DPAS 65-250 4P, DPAS 80-250 2P, DPAS 100-315 4P, etc.) are tabulated in the official PDF. See the official PDF for exact tabulated values.

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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 complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror