Cleanroom HVAC and Air Handling Equipment

Resistive Steam Humidifier

A precision atmospheric steam generator that boils mains or treated water with immersed resistance elements inside a serviceable stainless cylinder.

Close Steam Modulation
Stainless Steam Cylinder
Mains or Treated Water
Accessible Scale Collector

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Product Introduction

Electric immersion elements heat water in a stainless cylinder independently of water conductivity. This allows close output modulation and operation on potable, softened or demineralized feed water. Minerals settle toward a lower collection tank during blowdown, while the front service opening exposes the cylinder, heater flange and drain components for routine care.

Key Features

Dedicated resistance elements make steam output largely independent of feed-water conductivity.

A corrosion-resistant stainless cylinder supports potable or low-mineral water service.

A lower scale collector separates settled minerals from the main boiling zone for easier removal.

Proportional power control supports tighter relative-humidity response than coarse on-off boiling.

Customer Product Concerns

Precision humidification needs repeatable modulation while preventing scale from blocking drains or insulating the heater surface.

Low-conductivity treated water will not operate an electrode cylinder reliably.Immersed resistance elements generate heat without using water as the electrical path.

Scale accumulates around heaters and drain ports.Controlled blowdown and a removable lower collector separate and capture mineral solids.

A small RH deviation affects sensitive production or storage.Proportional element control provides fine steam-output adjustment over a broad range.

Heater inspection requires extensive cabinet disassembly.The front service door and flanged bundle expose the complete cylinder and element assembly.

Typical Applications

Precision pharmaceutical cleanroomsResearch and calibration laboratoriesHospital critical-care HVACSemiconductor process roomsMuseum archive humidity control

Technical Parameters

Typical commercial resistive humidifier construction and size ranges are shown below.

Core Material	Stainless steel steam cylinder with Incoloy-sheathed resistance heater bundle
Panel Thickness	1.0-1.5 mm stainless or powder-coated cabinet panels
Effective Width	450-1100 mm cabinet width
Maximum Length	Up to 406 mm overall cabinet depth
Steel Facing Thickness	1.0-1.5 mm stainless or coated steel enclosure
Core Density	Approximately 7900-8000 kg/m³ for stainless steel steam-cylinder material
Thermal Conductivity	Approximately 14-16 W/(m·K) for stainless steam-cylinder material
Surface Finish	Brushed stainless steel and charcoal powder-coated service panels
Joint Type	Bolted cabinet with flanged heater bundle, hose steam outlet and threaded water/drain ports
Customization	Available based on the intended application and operating environment.

Available Options

Potable, softened or reverse-osmosis feed waterSingle or multiple steam outletsDuct lance or direct-room blower distributionRemote humidity sensors and communications interface

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