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Bubble Cap Tray

Bubble cap trays are used primarily in applications with very low liquid loading and very high flexibility, where large turndown ratios are required.

Saiptech designs and provides a variety of bubble cap trays in which are the most leak free trays available. Our most common bubble cap designs include conventional slottedcaps (some have slots for vapor passage and others do not). Standard cap sizes are 3", 4" and 6". Of course, custom designs are available as well. The potential mechanicalconfigurations for the various riser and cap assemblies are numerous . Typical manufacturing methods to secure the riser and cap assembly to the tray floor include seal welding, press fitting, through bolting and swaging riser into extruded opening as depicted at right.

Bubble cap trays usually have a lower capacity (10-20 percent) than properly designed valve or sieve trays; however, they are capable of efficient performance over a wider operating range due to their superior leak proof characteristics.

Bubble Cap Type Available:

  • Round--Size 3",4",6" or tailor made
  • Tunnel type
  • Plastic type-PP, PVDF
  • Cast Iron

  • Copper

Fractionation trays are fabricated from a wide variety of materials. When corrosion is expected to be extremely low and design temperatures are not excessive, carbon steel is a logical choice because of its favorable mechanical design properties, malleability and low cost. However, since the material of construction is dictated by the process of each particular system for which the trays will be used many different material types may be required because of unique properties which allow some mate to have resistance to corrosion and to maintain their mechanical strength at elevated temperatures.

The most common tray materials that Saiptech utilizes are listed below starting from least expensive:
  • Carbon steel
  • Type 410S stainless steel
  • Type 304 stainless steel
  • Type 316L stainless steel
Other fairly common materials for tray fabrication are as follows:
  • 317L stainless steel
  • 321 stainless steel
  • 347 stainless steel
  • 904L stainless steel
  • 2205/2507 Duplex Steel
Saiptech has experiences and skills at tray fabrication, utilizing many of materials bellow such as:
  • Titanium
  • Nickel
  • Copper
  • Hastelloy
  • Teflon
  • Aluminum

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