Bubble cap trays are used primarily in applications with very low liquid loading and very high flexibility, where large turndown ratios are required. They typically have a 10%–20% lower capacity than properly designed valve or sieve trays; however, they deliver efficient performance over a wider operating range due to their superior leak-proof characteristics.

Saiptech designs and supplies a wide range of bubble cap trays, which are among the most leak-free trays on the market. Our most common bubble cap designs include conventional slotted caps — some feature slots for vapor passage, while others do not. Custom designs are also available to meet specific project needs, as the mechanical configurations for various riser and cap assemblies are highly versatile.

Typical manufacturing methods to secure the riser and cap assembly to the tray floor include seal welding, press fitting, and threaded connections.

Bubble Cap Types Available

• Round type — Sizes 3", 4", 6", also tailor-made
• Tunnel type — Thormann Tray
• Plastic type — PP, PVDF
• Cast Iron
• Copper