Demister Pads
  • Request A Quote
    Request a -quote
    Request A Quote
    Your Name *
    Country Code * + Phone Number *
    Message *
  • Send A E-mail
  • Send to printer
  • Product Catalogue

Demister Pads for Different Filtering Requirements

Demister pads, also called demister, mister eliminator, vapor pad, is installed at the top of packed tower to used for removing micron-sized liquid particles from a vapor stream. It is made of knitted wire mesh, which is woven interlocked to increase contact surface and improve separating efficiency. Stainless steel, copper, Monel and other alloy as well as polypropylene and other non-metallic materials make demister pad be used in more corrosive and high temperature applications. Generally, the demister pad is commonly used with structured packing and random packing

Demister pads can help to improve the operating condition, optimize process indicators, increase the amount of processing and recovery of valuable materials, protect the environment, and decrease air pollution.

A piece of stainless steel demister pads on white background.
Working Principles

The demister (demister pads) are installed at the top of packed tower. When the vapors carrying liquid entrainment rises at a constant speed and passes through the demister surface (interlocking knitted wire mesh), the vapor can easily passing through the demister while the rising liquid entrainment will collide with the mesh filament due to the inertia effect and are captured by the woven interlocked structure. Then the liquid will grow bigger and fall free when the droplets gravity exceeding vapor rising force and liquid surface tension force. As a result, the clean vapor passes through the demister and discharge out of the packed tower.

The working principle of demister pads filtering the mists.
Table 1: Demister Pads Material
Material Products Separated
SS304 For nitric acid, water steam
SS304L For petroleum Fractions
SS316 For fatty acids, reduced crude
SS316L Reduced crude containing acid & other corrosive
Copper Alcohol, Aldehyde, Amines
Monel For caustic soda & other alkali, dilute acid
Nickel For caustic soda, food product
Alloy 20 Nitric acid, alkaline PH
Teflon FEP For Highly corrosive conditions
Hostaflon PTFE For Highly corrosive conditions
Inconel 825 For dilute acid media & alkaline solution
Inconel 625 For phosphoric and fatty acid
Polypropylene For hydrilic acid, corrosive service at moderate temperature
P.V.D.F. Corrosive Service for Temperature 140 °C
P.T.F.E. / FEP / PFA / ETFE / ECTFE For highly corrosive and high temperature
Hostaflon Sulphuric acid plant, temperature up to 150 °C
Glass Wool For very fine mists
A piece of stainless steel demister pads.
A piece of Polypropylene demister pads.
Technical Data
Table 2: Demister Technical Data
Item Density (kg/m3) Free volume (%) Surface area (m2/m3) Application
1BDP-80 80 99.0 158 Moderate fouling, minimum press drop, dirty service
BDP-144 144 98.2 280 Heavy duty, e.g. oil & gas separators
BDP-128 128 98.4 460 Light fouling, high velocity, dirty service
BDP-193 193 97.5 375 General purpose, optimum efficiency & pressure drop, heavy duty
BDP-220 220 97.2 905 General purpose, optimum efficiency & pressure drop, high corrosive condition
1 density 80 is suitable for both metal materials and plastic materials.
Other models is only suitable for metal materials.
  • Large surface area and high separating and removal efficiency.
  • less maintenance and service required.
  • Adapt to any corrosive and temperature conditions.
  • Control emissions discharge and reduce air pollution
  • Eliminate or reduce equipment damage caused by corrosion
  • Increase the amount of processing and recovery of valuable materials
Filtration Industries
/ 04