Cleanroom HVAC and Air Handling Equipment

Chilled-Water Circulation Pump

A base-mounted end-suction centrifugal pump that circulates chilled water between the chiller, air-handling coils and process cooling branches.

Stable Hydronic Flow
Back-Pull-Out Service
Variable-Speed Ready
Rigid Base Alignment

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Product Introduction

The chilled-water pump couples a single-stage cast-iron volute to a high-efficiency motor on a common baseplate. Its end-suction geometry provides a straight inlet path, while the top discharge fits conventional mechanical-room headers. A guarded flexible coupling accommodates minor alignment tolerance and allows the rotating assembly to be serviced without disturbing connected pipework when a back-pull-out arrangement is selected.

Key Features

A smoothly contoured volute converts impeller velocity into useful system pressure with limited hydraulic loss.

Common-base motor and pump alignment reduces vibration transmitted to cleanroom piping networks.

Mechanical-seal and coupling access supports planned maintenance without cutting the main suction and discharge lines.

Variable-frequency drive compatibility follows two-way valve demand and reduces unnecessary throttling energy.

Customer Product Concerns

Chilled-water service requires correct flow, low vibration and reliable seals across continuously changing cooling demand.

Oversized constant-speed pumps waste energy against throttled valves.A variable-speed motor adjusts differential pressure and flow to actual coil demand.

Poor suction conditions create cavitation noise and impeller damage.A straight end-suction inlet and correctly selected NPSH margin support stable flow into the eye.

Motor-pump misalignment shortens bearing and seal life.A machined common base and guarded flexible coupling preserve shaft alignment.

Seal replacement causes extended system shutdown.Back-pull-out access removes the rotating assembly while the volute remains connected to the piping.

Typical Applications

Primary chilled-water loopsSecondary variable-flow distributionCleanroom AHU coil circuitsProcess-equipment cooling waterLow-temperature laboratory systems

Technical Parameters

Typical mechanical construction for a cleanroom chilled-water pump set is summarized below.

Core Material	Cast-iron volute with stainless steel or bronze impeller and steel shaft
Panel Thickness	8-16 mm fabricated steel baseplate thickness
Effective Width	350-900 mm typical pump-set width
Maximum Length	Up to 2400 mm including motor and coupling
Steel Facing Thickness	1.5-2.5 mm removable coupling-guard sheet
Core Density	Approximately 7000-7300 kg/m³ for cast-iron volute material
Thermal Conductivity	Approximately 45-55 W/(m·K) for cast-iron wetted casing
Surface Finish	Blue epoxy coating on cast iron with painted steel base
Joint Type	Flanged suction/discharge, flexible shaft coupling and bolted base mounts
Customization	Available based on the intended application and operating environment.

Available Options

Stainless steel or bronze impellerMechanical-seal material combinationsVariable-frequency drive and differential-pressure sensorSingle duty, duty-standby or twin-pump skid

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