Spirotherm, Inc. manufacturers the industry leading high efficiency Spirovent® coalescing type air elimination products and its extended line of Spirotrap® dirt separators. A wholly owned subsidiary of Spiro Enterprises, Inc. , we have been developing and manufacturing products to improve water quality in the HVAC industry for almost 40 years. Sizes from 3/4” to 36” pipe, flows to over 30,000 GPM for residential, commercial, industrial, and institutional applications.

Protecting the investment in high efficiency boilers, chillers, and other system components requires the fluid to be distributed efficiently. Eliminating air and dirt does away with many maintenance items that have been considered routine, saves energy, and improves overall system performance and heat transfer.

Combination Air / Dirt Separators

The Spirovent® Dirt and Drain Air Eliminator / Dirt Separator uses our patented Spirotube® medium to “scrub” the air and dirt from the system fluid and creates two low velocity, low turbulence separation chambers. Simple to install with a straight in-line full flow design it is available in the VDR, VDT, and VHT “Dirt” model as a sealed vessel and the VDN and VHN “Drain” model that includes a removable head and tube sheet construction. This allows access to the Spirotube bundle for inspection or cleaning.  Two full flow functions in one cost effective product eliminates the need for a separate air separator and high maintenance side-stream filter.

Spirotop Automatic Air Vents

The Spirotop has a unique “dry” vent design that helps prevent the system fluid from reaching the sping actuated Viton® seat and seal assembly, which is the cause of most conventional air vent failures.  The all brass, stainless, and non ferrous construction is rated at 150 psig at 270°F as standard and carries a 20 year limited warranty.  For special applications, both high temperature and high pressure options are available.

When compared to vents of lesser construction and lower standard ratings, the Spirotop is extremely cost effective, in fact in most cases less expensive.  It is becoming the standard replacement vent, especially with facilities departments responsible for multi-building campuses.

Spirotrap Dirt Separator

The Spirotrap® Dirt Separator, primarily applied in open condenser water systems, uses our patented Spirotube® medium to create a low velocity, low turbulence dirt separation chamber. Dirt and sediment is then able to break free of the flow path and fall to the bottom for blow down using the factory supplied ball valve.  Simple to install with a straight in-line full flow design, it eliminates the need for high maintenance sidestream filters.

Commercial series TDT, THT, TDN, and THN units are fabricated steel and available from 2” through 36” pipe size handling flows to over 30,000 GPM. Custom fabrication is available for special project requirements. For large high velocity systems the THT and THN Series are designed specifically for central plants and district systems where large volumes of water are being handled.

A user specified removable head is available on TDN and THN models for access to the Spirotube bundle for inspection or cleaning.