Forbes Marshall Air Eliminator FMAE
- Operates on a buoyancy-operated mechanism proven float-and-lever principle utilising a ball float assembly
- Robust Body Construction: The FMAE31 model is constructed with a Cast Iron body (IS 210 FG 260) , while the FMAE53 model features a heavy-duty Cast Steel body (ASTM A 216 Gr. WCB)
- Stainless Steel Internals: Internal components, including the ball float, lever, and valve seat, are manufactured from durable stainless steel grades (such as Type 304, 410, and 420)
- Fully Maintainable Design: Engineered with an easily accessible bolted cover and fully removable main valve seat and float assemblies
- Versatile Connections and Sizes: Available in DN15 (1/2″), DN20 (3/4″), and DN25 (1″) sizes with multiple connection options including Screwed (BSPT/NPT/BSP), Socket Weldable, or Flanged
- High Temperature and Pressure Capacity: The FMAE31 operates up to 13.0 bar g at 220°C, and the cast steel FMAE53 handles extreme conditions up to 32.0 bar g at 425°C
- Balance Pipe Tapping: The cover of the FMAE53 includes a 1/2″ tapping specifically for the installation of a balance pipe
Maintenance Schedule for Steam Distribution SystemVariants
- Sizes: DN15 (1/2″), DN20 (3/4″), DN25 (1″)
- End Connections: Screwed BSPT / NPT / BSP
- Max Allowable Pressure (PMA): 13.0 bar g
- Max Allowable Temperature (TMA): 220°C
- Max Operating Temperature (TMO): 220°C
- Max Differential Pressure (PMX): 13.0 bar g
- Cold Hydraulic Test Pressure: 20.0 bar g
- Minimum Operating Temperature: 0°C
- Sizes: DN15 (1/2″), DN20 (3/4″), DN25 (1″)
- End Connections: Screwed BSPT / NPT / BSP; Socket Weldable; Flanged
- Body Design Conditions: 32.0 bar g @ 425°C
- Max Differential Pressure (PMX): 4.5, 10.0, 13.0, 21.0, 32.0 bar g variants
- Cold Hydraulic Test Pressure: 64.0 bar g
- Minimum Operating Temperature: 0°C
Forbes Marshall Liquid Drain Trap FMLDT
Air Vents for Steam Systems FMAV
Strainers FMSTR
Steam Moisture Separator FMSEPFrequently Asked Questions
Air eliminators are the ideal solution for removal of air from steam systems. The Forbes Marshall Air Eliminator, FMAE31, is designed to efficiently remove air and other non-condensable gases from steam systems. This trap can also be used for liquid systems like hot water, heating systems, chilled water, and industrial process systems.
Air eliminators, like the FMAE31, should be installed at points in the system where air is likely to accumulate, such as at high points in liquid pipelines or near equipment prone to air entrapment. It is particularly suited for use in heating and cooling systems, industrial process pipelines, and applications where liquid system efficiency is critical.
The FMAE31 is constructed with high-quality cast iron and stainless steel components, ensuring robust performance and long-lasting durability even under demanding industrial conditions. These materials provide resistance to corrosion and wear, ensuring reliable operation over an extended service life.
The primary difference lies in their material construction and corresponding pressure-temperature tolerances.
The Forbes Marshall Air Eliminator FMAE31 is constructed from cast iron and is rated for a maximum of 13.0 bar g at 220°C, making it ideal for standard applications.
In contrast, the FMAE53 is forged from cast steel to endure severe industrial environments, handling up to 32.0 bar g at 425°C.
