Flowserve UNA 38 Uživatelský manuál stáhnout pdf (Strana 5)

Explanatory Notes

Scope of supply

UNA 38 with DUPLEX control unit

1 F

loat trap UNA 38

1 Installation manual

UNA 39 with DUPLEX control unit

1 Foat trap UNA 39

1 Installation manual

Retroﬁt set for UNA 38, UNA 39

1 Control unit as per speciﬁcation

1 Installation manual

Spare parts

1 Set according to spare parts list on page 18

Description

UNA 3... are high-pressure steam traps with ball ﬂoat and needle closing mechanism. The steam traps

work independently of back pressure, thus ensuring universal application.

The steam trap UNA 3… features a body with bolted cover and a control unit. Various control units

are available.

Level-dependent SIMPLEX control is particularly suitable for cold condensate and superheated steam.

Temperature-dependent DUPLEX control offers automatic deaeration by means of a bimetallic air vent

for saturated and superheated steam systems.

The oriﬁce type O 80 MAX (UNA 38) is a control unit for large ﬂowrates and high pressures, and can

be supplied as a SIMPLEX or DUPLEX version.

The oriﬁce type O 140 MAX (UNA 39) is a SIMPLEX control unit for large ﬂowrates and high pressures.

UNA 38 with SIMPLEX control unit

1 Float trap UNA 38

1 Hand vent valve with gasket, installed

1 Float lifting lever with gasket, installed (optional)

1 Installation manual

UNA 39 with SIMPLEX control unit

1 Float trap UNA 39

1 Hand vent valve with gasket, installed

1 Float lifting lever with gasket, installed (optional)

1 Installation manual

Function

UNA 38, UNA 39:

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 (O) dictates the maximum ﬂowrate when the valve is

completely open. The maximum admissible differential pressure of the control unit is a function of the

CSA of the oriﬁce, the density of the ﬂuid to be discharged, and the pressure/temperature ratings of the

body. Different closing units (oriﬁces) are available.

Float traps equipped with DUPLEX control units enable automatic temperature-dependent deaeration

of saturated steam systems during start-up and in continuous operation.

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