Air Management For Hydronic Heating and Cooling Systems

Every heating, cooling or dual hydronic system requires effective air management to provide maximum performance efficiency. Proper air control enhances hydronic system energy efficiency by helping reduce pipe corrosion and scaling which adds extra unnecessary friction losses. Less internal corrosion decreases maintenance costs, increasing system life, and with air removed there can be less system noise, reducing occupant complaints.

Bell & Gossett has been the hydronic systems innovator with over 100 years’ experience in providing reliable products and systems design advice for hydronic, HVAC and plumbing systems. Their air management products are designed to make your system more energy efficient, trouble-free and long lasting.

A Great Solution for Any HVAC Application

The Bell & Gossett CRS coalescing-style air and sediment separator is available for use in any HVAC system. Its internal coalescing media helps break entrained air and suspended solids out of your system fluid. The CRS efficiently removes these contaminants, therefore improving heat transfer capabilities. This results in lower energy costs while protecting pumps, boilers and other components, and extending the life of your system. With its wide variety of sizes, connections and configurations, the Bell & Gossett CRS is a great solution for any HVAC application.

Features/Benefits:

• Improved system efficiency:
  • Lowers energy costs and improves comfort by removing poor heat transfer media like air and sediment from system fluid
• Removal of system impurities:
  • Removes up to 100% of free air and 100% of entrained air from your hydronic system
  • Removes sediment to 30 µm within 100 passes
• Prolonged system performance:
  • Improves and extends the life of your system components
  • Withstands system operating conditions to provide long life expectancy, thanks to a robust design with stainless steel coalescing media

Built to Perform

Models for All Applications

The CRS is available in a wide variety of models and sizes. Whether you are looking for an air separator, sediment separator, or combo separator, standard velocity or high velocity, or models with or without removable coalescing media the CRS has an option that is perfectly suited to meet your system needs.

CRS Mag

For additional protection against ferrous sediment, the CRS is available with an optional magnetic insert. Comprised of neodymium 45H magnets with a strength of 13,550 Gauss, the magnetic rod helps remove metallic sediment that can pose a serious threat to modern system components. The insert can be easily moved from its position inside the separator to facilitate blow down and sediment removal.

Supreme Air Separation for Commercial Systems

The Rolairtrol is a patented air separator with significant advantages for all types of HVAC systems. It removes air that commonly causes problems in commercial hot and chilled water systems, and provides air-free flow, improving system efficiency and performance.

The Rolairtrol removes entrained air from the system fluid through time-tested centrifugal action. It provides maximum air separation efficiency through a combination of centrifugal force and velocity reduction. Unwanted air is separated by the differences in density between air and water.

Its tangential design creates a whirlpool inside the vessel, sending denser air-free water to the outer section near the shell, while the separated air migrates to the low-velocity center where it is drawn to the air collector. The separated air is removed from the system through the Hi-Capacity Air Vent in an air elimination system, or directed to the compression tank in an air control system.

A removable strainer is standard on the “R” model, reducing the quantity of components required for installation. The strainer has a free area of not less than five times the cross sectional area of the flange connection size. All debris that is collected within the strainer can be removed from the vessel through the blowdown connection on the bottom of the vessel.

In chilled water applications the Rolairtrol acts as a buffer tank to increase the chilled water volume. The increased water volume of the Rolairtrol improves chiller water temperature control, stabilizing system operation, and reducing compressor cycling compared to chiller loops with insufficient water volume.

Patented in 1951, the Rolairtrol has been the best overall air separator in the commercial HVAC market with respect to initial cost, effectiveness, maintenance and operating cost for over 40 years.

Feature/Benefits:

• High operating flow capacities.
• Low pressure drop, greatly reducing overall pump operation costs.
• Designed, constructed, and stamped in accordance with ASME Section VIII, Division 1.
• Patented tangential flow-through design maximizes air separation efficiency.
• Proven reliability – Rolairtrol has successfully increased system efficiencies for 40 years.
• Buffer tank ability – The Rolairtrol contributes to meeting the minimum loop volume.
• Backed by Bell & Gossett’s 100+ years’ experience in hydronic, HVAC and plumbing systems.

Airtrol Tank Fittings