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  • SULZER Precision Machined Pump Balance Drum
  • SULZER Precision Machined Pump Balance Drum
  • SULZER Precision Machined Pump Balance Drum
  • SULZER Precision Machined Pump Balance Drum
  • SULZER Precision Machined Pump Balance Drum

SULZER Precision Machined Pump Balance Drum

Product Details
Model NO.:
SULZER Pump Balance Drum
Pump Package:
Carton And Wooden Cases
Testing:
Dynamic Balancing
Types Of Welding Parts:
OEM/ODM
Material Standard:
ASTM, ANSI, SAE, Uns, DIN, En, ISO, Toct
Material 1:
Cast Iron, Wear-Resistant Cast Iron, Cast Steel
Material 2:
Stainless Steel, Duplex Ss, Cast Alloy Steel
Certificate:
ISO9001:2015, ISO14001:2004, API Specification Q1
Mould:
Investment Casting Mould, Sand Casting Mould
Pump Model.:
Mc/MD/G Sg/CD8/Bbtd/Msd/Mca/Mce/Mcv
Transport Package:
Carton And Wooden Cases
Specification:
According To The Drawings
Trademark:
HydroBlue
Origin:
China
HS Code:
84139100
Production Capacity:
10, 000 Tons Per Year
Highlight: 

Sulzer pump balance drum

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precision machined pump parts

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replacement balance drum Sulzer

Payment & Shipping Terms
Minimum Order Quantity
1
Price
35
Product Description
SULZER Balance Drum – Balancing Component

About Dongguan HydroBlue Co., Ltd.

DONGGUAN HydroBlue CO.,LTD. delivers precision replacement solutions to the global industrial pump market — combining sound engineering judgment with rigorous manufacturing discipline to produce parts that perform reliably in demanding field conditions.

Our 8-person technical team spans the critical knowledge areas for pump component engineering: hydraulic system design, mechanical engineering and precision machining, power electronics, and instrumentation and measurement. This interdisciplinary base allows us to approach every part with a systems-level perspective — understanding not just how it is made, but how it interacts with adjacent components and operates under actual pump conditions.

We draw on strategic partnerships that expand our technical capacity:

  • Jiangsu University National Research Center of Pumps — hydraulic simulation and pump energy efficiency optimization
  • Chinese Academy of Sciences — specialized surface coatings for wear and corrosion control
  • Guangdong University of Technology — industrial drive systems and intelligent control technology

SULZER Precision Machined Pump Balance Drum 0

Provide your pump model and balance drum details — our engineering team will verify the specification and provide a complete quotation with material recommendation and delivery schedule.

OUR BRANDS & SERVICES

Our technical brand provides a single accountable source for fluid machinery requirements — spanning parts supply, engineering integration, and international field services. The product portfolio includes pumps, frequency converters, servo drives, PLC-HMI automation panels, motor control cabinets, electric motors and gear reducers, mechanical seals and assemblies, couplings, and gearboxes. For field support, we deploy our own engineers overseas for FARO 3D scanning, laser alignment, pump commissioning, and equipment debugging.

Product Overview

SULZER Balance Drum is a critical component in multi-stage centrifugal pumps, designed to manage the axial thrust generated by the cumulative pressure differential across each impeller stage. In a multi-stage pump, the impellers discharge into progressively higher pressure zones, creating a net axial force that pushes the rotating assembly toward the suction end. Without a balancing mechanism, this thrust would overload the thrust bearing and cause rapid bearing failure.

The balance drum is mounted on the pump shaft at the discharge end. High-pressure fluid from the final stage is routed to the drum's back face, acting against the forward thrust of the impellers. The drum rotating in a close-clearance stationary bushing creates a controlled pressure drop across the radial clearance, producing an adjustable balancing force that keeps the rotating assembly in near-neutral axial position throughout the pump's operating range.

Our replacement balance drums are machined from wear-resistant materials and precision-ground to maintain the correct radial clearance with the balancing bushing over extended service periods. Available with or without surface hardening, depending on service conditions.

Material Selection Guide

Material

Hardness

Application

4140 Alloy Steel (Q&T)

28–32 HRC

Standard multi-stage pump service, clean water, moderate pressure

420 Stainless Steel

45–52 HRC

Corrosive service with moderate abrasives — high hardness with corrosion resistance

17-4PH Stainless (H900)

38–44 HRC

High-pressure service, corrosive fluids, good galling resistance

Stellite®-Faced Drum

38–55 HRC (face)

Severe abrasive service, high-temperature process pumps

416 SS + Hard Chrome (OD)

60–70 HRC (chrome surface)

Maximum wear resistance at drum OD clearance surface

Why Proper Drum Condition Matters
  • Bearing Life — A worn balance drum loses its ability to offset axial thrust, transferring additional load to the thrust bearing and reducing its service life by 50% or more
  • Efficiency Impact — Excessive radial clearance between drum and bushing increases leakage flow, reducing pump volumetric efficiency by allowing high-pressure fluid to bypass the final stage
  • Vibration — Uneven drum wear creates imbalance and hydraulic excitation, which manifests as increased shaft vibration and potential damage to seals and bearings
  • Clearance Monitoring — Typical new radial clearance is 0.15–0.30 mm on diameter. Many operators schedule replacement when clearance doubles, or at every major pump overhaul
Other High-Wear Parts

Category

Parts

Balance Assembly

Balance Drum, Balance Bushing, Balance Disc, Thrust Bearing

Rotating Parts

Impeller, Expeller, Shaft, Shaft Sleeve, Key

Casing Parts

Volute Casing, Casing Cover, Wear Ring, Side Plate

Sealing Products

Mechanical Seal, Packing Seal, Gasket, O-Ring, Isolator

Contact Us at Any Time

Room 1904, Building 1, Zhongtang Tianan Digital City, No.89 Jinyuan Road, Zhongtang Town,Dongguan City, Guangdong Province, China.
Send your inquiry directly to us