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Magflow<sup>®</sup> Stainless Steel Multistage Pump

Magflow^® Sectional Seawater Pump

Magflow^® Stainless Steel Multistage Pump Specifications

Size	25-400 mm
Capacity	3.75-3600 m³/h
Head	50-2500 m
Particle Size	≤1.3mm
Tempreature	0-105℃
Power	5.5-4000 kW
Materials	Cast iron, Cast Steel, SS304, SS316L, Chrome Steel, Bronze, Duplex Stainless Steel, etc

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Magflow^® Multistage Seawater Pump Product Description

Magflow^® Staineless Steel multistage pump buit the wet-end components in stainless steel, making them specially designed to transport corrosive media such as acids, alkalis, salts, and seawater without solid particles, while also being suitable for handling conditions where the solid particle content does not exceed 2% (with a particle size of less than 1 mm) and the medium's solid concentration is less than 5% wt.

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Magflow^® Salt Water Multistage Pump Design Features

1. Structural Overview & Nozzle Arrangement

Pump Definition: Horizontal sectional multistage centrifugal pump; the first stage can be configured with a single-suction or double-suction structure.
Nozzle Orientation: Suction nozzle supports horizontal or top-vertical orientation; discharge nozzle is top-vertical.
Drive & Rotation: Directly driven by the prime mover via a flexible pin coupling or a diaphragm coupling; rotates clockwise when viewed from the drive end (DE).

2. Casing & Hydraulic Flow Passage Components

Flow Chamber: The working chamber consists of the suction casing, stage casings, secondary suction casing, discharge casing, forward/reverse diffusers, and transition pipe, tightly secured via high-strength tie bolts.

3. Rotor & Bearing System

Rotor Assembly: Precision-assembled from the shaft, symmetrically arranged forward and reverse impellers, throttling and decompression device, thrower (deflector), and shaft sleeves.
Bearing Configuration: Features a grease-lubricated "fixed-floating" bearing arrangement. The drive end utilizes cylindrical roller bearings, while the non-drive end (NDE) incorporates angular contact ball bearings to ensure precise rotor positioning and absorb residual axial thrust.

4. Sealing & Protective System

Shaft Seal Options: Offers interchangeable mechanical seals or gland packing configurations; replaceable shaft sleeves are installed at the sealing zones to protect the shaft.

5. Maintenance Advantages

In-Line Servicing: The modular design allows rapid replacement of bearings and shaft seals without disconnecting suction or discharge piping, significantly reducing maintenance downtime.

Magflow^® Multistage Pump Performance Parameters

Model	Capacity Q (m³/h)	Head H (m)	Speed n (rpm)	Power P (kW)	Eff. η (%)	NPSHr (m)
TDP6-25	3.75-7.5	73.5-306	2950	4-18.5	53	2-2.5
TDP6-50	3.75-7.5	144-624	2950	11-55	36	3-3.5
TDP6-80	3.75-7.5	220-982	2950	18.5-75	36	3-3.5
TDP12-25	7.5-15	69-338.4	2950	7.5-30	58	2-2.5
TDP12-50	7.5-15	93-648	2950	15-75	49	2-2.5
TDP12-80	7.5-15	220-982	2950	30-132	40	2-2.5
TDP25-30	15-30	82.5-340	2950	15-45	68	2.2-2.4
TDP25-50	15-28	144-618	2950	22-110	61	2.4-2.8
TDP25-80	15-30	380-1013	2950	75-160	56	3.1-3.8
TDP46-30	30-55	81-340	2950	22-75	75	2.4-4.6
TDP46-50	30-55	138-666	2950	37-160	71	2.5-3.2
TDP46-80	27-54	380-1056	2950	110-280	65	3.9-5.5
TDP85-45	55-100	117-510	2950	55-185	77	3.2-5.2
TDP85-67	55-100	183-740	2950	90-280	73	3.3-4.4
TDP85-80	51-102	304-880	2950	132-355	71	3.5-4.5
TDP85-100	51-102	285-1100	2950	132-450	65	3.8-4.6
TDP120-50	96-140	126.9-545	2950	90-250	78	3.2-6.7
TDP120-100	96-144	360-1260	2950	220-630	74	3.8-5.5
TDP150-30	119-190	85.5-330	2950	75-220	83	3.8-5
TDP150-50	120-180	85-550	2950	75-355	75	3.2-6.6
TDP150-80	90-180	228-880	2950	185-630	75	3.2-6.6
TDP150-100	120-180	285-1100	2950	200-710	73	3.8-5
TDP155-67	100-185	118-760	2950	90-450	79	3.2-6.6
TDP200-50	120-240	135-580	2950	132-400	81	4.5-5.8
TDP200-100	150-240	168-1130	2950	185-900	76	3.5-5
TDP200-150	150-240	378-1725	2950	400-1400	72	2.5-3
TDP210-70	160-260	186-712	2950	200-710	79.2	6.2-7.8
TDP280-100	196-336	368-1100	2980	500-1250	78.5	4-6.5
TDP155-30	119-190	54-320	1480	45-200	82	3.2-4.8
TDP155-50	120-180	127.5-550	1480	110-355	71	3.2-6.6
TDP200-50	132-240	198-544	1480	185-450	75	2.3-4.1
TDP280-43	185-335	76-470	1480	110-500	81	2.5-5.2
TDP280-65	185-355	186-680	1480	280-900	74	2.8-5.0
TDP280-95	180-335	244-979.7	1480	355-1120	72.5	2.5-3.7
TDP300-45	200-350	80-445	1480	110-450	85	2.5-5.2
TDP360-40	300-440	106.5-420	1480	185-630	84	4.65-5.4
TDP360-60	300-440	210-640	1480	400-1000	74.5	3.1-5.3
TDP360-95	280-410	244-979.4	1480	400-1400	73	2.6-3.8
TDP450-60	335-500	113-650	1480	250-1000	84	4.1-6.3
TDP450-95	385-515	244-979.7	1480	500-1800	75	2.8-4
TDP500-57	450-550	162-600	1480	355-1250	82	4.4-5.8
TDP550-50	450-590	90-540	1480	220-1000	84	5.2-6.5
TDP580-60	450-638	165-650	1480	450-1250	82.5	3.16-5.16
TDP640-80	530-760	201.6-904	1480	710-2240	78	7.2
TDP720-60	550-850	171-660	1480	560-1800	82	7
TDP1100-85	850-1350	221-862	1450	1250-4500	84	7

Magflow^® TDP Horizontal Self-balancing Multistage Pump Typical Applications

Magflow® Stainless Steel Multistage Pumps

Magflow^® Stainless Steel Multistage Pumps

Magflow^®Stainless steel multistage pumps are ideal for handling seawater due to their superior corrosion resistance and high-pressure capabilities.

Water Treatment & RO Systems

Desalination Plants: Providing high-pressure feed water for Reverse Osmosis (RO) seawater desalination systems.

Filtration & Softening: Booster pumping across industrial ultrafiltration, nanofiltration, and ion exchange loops

Marine & Offshore Utilities: Handling general seawater service, cooling water circulation, and ballast water management on ships and offshore platforms.

Coastal Industrial Processes: Supplying raw seawater for cooling towers, coastal industrial plants, and aquaculture operations.

Corrosive & Chemical Transfer

Chemical Procesing: Pumping mild acids, alkalis, saline solutions, and industrial cleaning agents where contamination-free fluid paths are required.

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