Gas–liquid separation internals · Mesh pad, vane (chevron) or fibre-bed type by droplet size, capacity and fouling, pressure drop, and pad construction data
A mist eliminator (demister) is an internal fitted in separators, scrubbers, evaporators and towers to remove liquid droplets entrained in a gas stream before they carry over to downstream equipment or the stack. Fix three things before asking for a design: the droplet sizes and liquid load to be removed, the gas flow, pressure and fouling tendency that set the type and area, and the materials, construction and allowable pressure drop.
Knitted wire-mesh pads, vane or chevron packs, fibre-bed candles and panels, and combined units for vertical or horizontal gas flow in process vessels and stacks. Complete separator vessels, cyclones sold alone, oil-mist collectors for machine tools and air filters are outside this page.
01
Koch-Glitsch, a mist eliminator maker, lists FLEXICHEVRON vane (baffle or zigzag blade) mist eliminators for droplets greater than 8 to 40 µm depending on design and operating conditions, for vertical or horizontal flow. It says their open channels minimize plugging and their smooth surfaces promote drainage, so they handle high liquid loads with minimal pressure drop and offer better fouling resistance. Styles 250 and 350 add drainage channels against re-entrainment at higher throughput and pressure. [1]
For fine mists it lists FLEXIFIBER fibre beds: type IC (impaction) for liquid particles in the 1–3 µm range, and type BD (Brownian diffusion) for submicron mists. For BD, it notes collection efficiency increases as gas flow through the bed decreases, because longer residence time favours Brownian movement. Fibre beds can reduce visible stack plumes and are offered with guaranteed pressure drop as low as 1.5 in (40 mm) water gauge. [2]
For knitted wire-mesh DEMISTER pads it describes high collection efficiency at low pressure drop in a range of metals and plastics, with mesh styles selected for the required efficiency. [3]
Koch-Glitsch calls the knitted mesh pad a practical starting point when vessel size is not set by the mist eliminator design. [3] Editorial note: from the ranges above, vanes suit coarse, high-load or fouling service and fibre beds fine and submicron mist; combined units pair a fine stage with a high-capacity stage.
Give the supplier the gas composition, flow, pressure and temperature, the liquid and its load, the droplet size distribution or source (boiling, condensation, scrubber), fouling or solids, allowable pressure drop and carryover limit, vessel diameter and orientation, materials of construction and installation access.
02
Koch-Glitsch says high-capacity DEMISTER styles can give 20% or more design capacity than its traditional mesh pads, with lower pressure drop, higher efficiency and equal or better fouling resistance. Its DEMISTER-PLUS designs, which combine a mesh pad with a vane or cyclone stage, can reduce vessel diameter by 25–40% in new plants, cutting vessel weight by 50–75%, and add capacity in revamps. [3] It notes that at higher pressures the allowable velocity decreases as gas density increases. [1]
A linked maker's ordering example for a wire-mesh demister pad specifies a pad of 12 × 120 × 4 in, glass-fibre and 32 SWG wire, density of 15¾ lb/ft³, contact surface of 400 m²/m³ and 98.5% free space for fine entrainment. [4] It lists vane and wire-mesh types for vertical and horizontal installation, in metals, plastics and FRP. [4]
Editorial calculation: a vessel diameter reduced by 25–40% means a cross-sectional area reduced to roughly 36–56% of the original (0.75² ≈ 0.56; 0.60² = 0.36), which is why the combined designs save so much vessel weight. [3]
Linked suppliers list mist eliminators and demister pads alongside column internals, trays and packing. [5]
03
Suppliers linked to this page list mist eliminators; each card links to the page reviewed.
The listings reviewed cover vane and wire-mesh mist eliminators and demister pads made to order, within wider ranges of column and separator internals; ask each for droplet removal efficiency at your conditions, design velocity basis, pressure drop and material certificates.
04
This is a functional reference built from the sources cited; it is not one maker's specification.
| Part | Role | Fix in the order |
|---|---|---|
| Mesh pad | Fine to medium entrainment. [3] [4] | Wire, density, thickness. |
| Vane pack | Coarse droplets, high load, fouling. [1] | Blade profile; drainage. |
| Fibre bed | 1–3 µm and submicron mist. [2] | IC or BD type. |
| Support grids and frames | Hold the element in the vessel. [5] | Grid; fixing. |
| Drainage features | Prevent re-entrainment. [1] | Channels; sumps. |
| Materials | Metals, plastics, FRP, glass fibre. [1] [4] | Material. |
05
A mist eliminator quotation needs values for your service. The table explains each field, gives published values where a reviewed source states them, and says what to obtain from the supplier.
| Field | What it means and published values | Ask the supplier for |
|---|---|---|
| Operating Temperature (°C) | Material limit. | Range. |
| Gas Flow Rate (m³/h) | Sets area; allowable velocity falls with pressure. [1] | Design flow. |
| Separation Efficiency (%) | By droplet size: vane >8–40 µm; fibre 1–3 µm and submicron. [1] [2] | Efficiency curve. |
| Pressure Drop (kPa) | Fibre beds from 40 mm W.G. (≈0.4 kPa). [2] | Clean and loaded ΔP. |
| Mist Removal Capacity (mg/m³) | Outlet carryover limit. | Guarantee. |
| Vessel Diameter (mm) | Combined designs cut diameter 25–40%. [3] | Area; diameter. |
| Material Grade | Metals, plastics, FRP. [1] [4] | Grade. |
| Weight (kg) | Element and supports. | Weight. |
| Flange Rating | For candle or housing units. | Rating. |
06
Paste it into your enquiry below or into an email to a maker, then replace every bracket.
Gas: [composition; flow; pressure; temperature] Liquid: [type; load; droplet size] Fouling: [solids; scaling] Limits: [carryover; pressure drop] Vessel: [diameter; orientation; manway] Type: [mesh; vane; fibre; combined] Materials: [metal; plastic; FRP] Quantity: [elements]
These companies list mist eliminators.
Lists vane-type and wire-mesh demister pad mist eliminators for vertical and horizontal installation.
Product scope checked 2026-10-11
Lists mist eliminators and demisters among column, separator and reactor internals.
Product scope checked 2026-10-11
Lists vane mist eliminators and demister pads among separation equipment and tower internals.
Product scope checked 2026-10-11
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
Koch-Glitsch lists its vane units for droplets greater than 8 to 40 µm, depending on design and conditions. [1]
Koch-Glitsch lists Brownian-diffusion fibre beds for submicron mist and impaction fibre beds for 1–3 µm. [2]
Koch-Glitsch says combined designs can cut new vessel diameter by 25–40% and weight by 50–75%. [3]
Koch-Glitsch notes allowable velocity decreases as gas density increases at higher pressure. [1]
Sources checked 2026-10-11. Koch-Glitsch is a mist eliminator maker publishing droplet ranges, capacity and pressure-drop data for its mesh, vane and fibre-bed lines; Boegger and Saiptech are linked suppliers.
Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.
Compare manufacturer profiles with relevant product and process capability.