Flowserve UNA 23 - Manual (Page 5)

5
Function
The ball valve of the control unit is operated by the float as a function of the condensate level in the
trap. The cross-sectional area (CSA) of the orifice dictates the max. flowrate when the valve is
completely open. The max. admissible differential pressure of the control unit is a function of the CSA
of the orifice and the density of the fluid to be discharged. There are different closing units (orifices)
available which can also be exchanged subsequently. Float traps equipped with control units DUPLEX
enable automatic temperature-dependent deaeration of saturated steam systems during start-up and
in continuous operation.
Explanatory Notes
Scope of supply
UNA 23h/v, UNA 25h/v, UNA26h/v,
UNA 26h stainless steel, UNA 27h
1 Steam trap UNA 2..
1 Installation manual
Description
UNA 2.. are ball float traps with rolling ball closing mechanisms.
The steam traps work independently of back pressure, thus ensuring universal application.
The steam trap UNA features a body with bolted cover and a control unit. Two different control units are
available: Level-dependent SIMPLEX control for cold condensate and superheated steam, and
temperature-dependent DUPLEX control with automatic deaeration for saturated steam systems.
Optional item: sightglass cover with integral water-level gauge glass (UNA 23, PN 16).
UNA 2 . . with Simplex control
1 Steam trap UNA 2..
1 Hand vent valve with gasket
1 Installation manual
UNA 2 . . with float lifting lever
1 Steam trap UNA 2..
Float lifting lever installed
1 Lever extension
1 Installation manual
UNA 23h, UNA 25h, UNA 26h, UNA 26h stainless steel:
for installation in horizontal pipes
UNA 23v, UNA 25v, UNA 26v:
for installation in vertical pipes
UNA 23h, UNA 23v:
with sightglass cover (integrated reflexion water level indicator)
Design