DPAS Horizontal-split-case

Summary

Product identification

• Series: DPAS C
• Type: Split case double suction centrifugal pump

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.
• Performance curves are valid for 20 °C clean water.

Electrical

DPAS series pumps use 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 50 Hz, 2-pole and 4-pole configurations, including power, current, starting current ratio, power factor, efficiency, voltage, nominal speed, IEC connection, mass, and sound pressure level, are provided 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 for easy mounting.
• Double suction impeller reduces NPSH values and allows for high suction lifts.
• Short shaft design is available for mechanical seal applications, resulting in compact and rigid pumps.
• Pump and motor are separate components, connected via a flexible coupling and mounted on a base plate.

Bearings

• Pump groups A, B, and C: Ball bearings at both the dead and drive ends.
• Pump groups D, E, and F: Cylindrical roller bearing at the drive end and a ball bearing at the dead end.

Shaft Seal

Standard shaft seal is Burgmann MG1:

• Single Seal
• Unbalanced
• Elastomer Bellows
• Independent on direction of rotation
• Different types of mechanical seals are available.

Materials

Standard materials:

• 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 connection sizes (DNs, DNd) and other geometric parameters (Lp, e, f, h1, h2, Hp, A, B, G, b, m1, m2, n1, n2, s, l, d in mm), are available in the official PDF.

Model Key

The model key defines pump characteristics:

• DPAS: Pump series horizontal split case
• Casing material: C (Cast iron GG25 - 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 (e.g., 65, 80, 100)
• Nominal diameter impeller: In mm (e.g., 250, 360)
• Reduced diameter impeller: In mm (e.g., 200)
• Motor poles/frequency: 2P-50 Hz, 4P-50Hz, 2P-60 Hz, 4P-60 Hz (xx = bare shaft)
• Motor power P2: In kW (e.g., 37 kW)
• Impeller material: - (GG25 - 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)

Specific Model Data

Detailed specifications for individual DPAS models (e.g., DPAS 65-250 4P, DPAS 80-360 2P), including impeller diameter, P2 power, pump mass, and part number, are provided in tabulated form within the official PDF.

Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF. For contractual data and complete specifications, always refer to the official OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror