Size classes: DN 15-150
Pressure classes: PN 16-160
Materials: GG-25, GGG 40.3, GS-C 25N, AISI 316
Connection types: flanged, threaded, welded sleeves, welded connection
Other designations: float trap, float steam trap
The float steam trap is a good choice for many applications, as it is the only model that removes condensate regardless of its temperature. In practice, this means that the condensate is removed at the temperature at which it reaches the trap, thanks to the float trap technology. This is an important feature, for example, when selecting a condensate trap after a heat exchanger.
Another important feature is the wide capacity range of the condensate trap. Float steam traps are well suited for both small and very large quantities of condensate.
Most float steam traps lack an internal non-return valve. Therefore, it is recommended to add a non-return valve between the flanges, e.g. RK86, immediately after the float trap. Note: even if the line is descending, adding a non-return valve is advisable, as reverse flow may occur on the downward side under under-pressure conditions.
We assist in the sizing and selection of the appropriate condensate trap for your application.
The GESTRA product range includes, in addition to small float steam traps, high-capacity float steam traps achieving up to 16 000 kg/h throughput.
Our range also includes high-pressure float steam traps. At maximum, they allow a discharge pressure of up to 140 bar.
The GESTRA product selection also features pump-type float steam traps. They use auxiliary steam if the process’s natural pressure difference is insufficient and the condensate trap becomes water-bound.
Read more about condensate lifting.
Float steam traps are not recommended for installation outdoors without auxiliary heating.
If the condensate line after the trap rises, we recommend protecting the float trap from water hammer with the GESTRA RK non-return valve.
The product line known as UNA 2x was launched in the 1960s. They were the first compact float trap models with an integrated inert gas venting system. The UNA 2x series has now been replaced by the UNA 4x series. Spare parts for the UNA 2x condensate trap models are still readily available through our Helsinki warehouse.
In 2017, GESTRA introduced the new UNA 43 and UNA 46 traps, which are also available in nominal sizes DN 80, 100, and 150. The model is based on GESTRA’s proven technology, where the sealing ball of the plug is mounted on an axle so that it rotates. This effectively prevents leakages caused by clogging.
Alongside the traditional model, the UNA MAX range is also available. As the name suggests, the MAX series offers higher capacity with a smaller nominal size.
Watch the UNA 4 presentation in our webinar.
GESTRA UNA43, UNA46 Ball Float Steam Trap
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GESTRA UNA45MAX, UNA46MAX, UNA46AMAX Ball Float Steam Trap
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GESTRA UNA45, UNA46, UNA46A Ball Float Steam Trap
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GESTRA UNA38, UNA39 Ball Float Steam Trap
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GESTRA UNA14P Air Trap
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GESTRA UNA14, UNA16 Ball Float Trap
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