Flowserve UNA 38 Manuale Utente Scaricare il pdf (Pagina 15)

WINIX

2150 is a registered trademark of WINIX GmbH, Norderstedt

Maintenance

GESTRA steam traps of the type UNA do not require any special maintenance.

However, if the steam trap is to be used in a new installation which has not been ﬂushed yet,

it is advisable to check and – if required – clean the trap.

The UNA steam traps can be checked for steam loss during operation by using the GESTRA ultrasonic

measuring unit VAPOPHONE

or TRAPtest

In case of steam loss, clean the valve and/or replace the control unit or oriﬁce.

Checking the steam trap

Cleaning/exchanging the control unit

1. Take heed of the “Danger” note on page 4.

2. Undo the hexagon nuts

k, remove the sleeves l from the expansion bolts z, and take off

the cover w.

Unscrew and remove the bimetallic air vent C; take out the gasket D.

Install a new bimetallic air vent C together with a new gasket. For the torque, see the table “Torques”

on page 16.

Insert a new body gasket :.

Put the cover onto the body and push the sleeves l onto the expansion bolts z. Tighten the hexagon

nuts k evenly crosswise in several stages to the values speciﬁed in the “Torques” table.

Changing the bimetallic air vent (UNA 38)

1. Take heed of the “Danger” note on page 4.

2. Undo the hexagon nuts

A, remove the sleeves B from the expansion bolts P, and take off

the cover M.

3. Undo the union nut

X and take it out of the body together with the control unit E, r or ; (UNA 38);

alternatively, undo and remove the hexagon socket-head screws T, and take out the control unit

r or ; (UNA 39).

Replace the control unit in case of visible signs of wear or damage.

Clean the body, internals and all gasket surfaces.

Apply heat-resistant lubricant to all threads and the seating surfaces of the control unit and cover

(use e.g. WINIX

2150).

Attach the control unit E, r or ; (UNA 38) with the union nut and align it within the body so that the

ﬂoat ball can move vertically. Tighten the union nut. Insert a new gasket U for control unit r or ;

(UNA 39), put on the control unit and tighten the hexagon socket-head screws T evenly crosswise.

For the torques, see the table “Torques” on page 16.

Insert a new body gasket Q.

Put the cover onto the body and push the sleeves B onto the expansion bolts P. Tighten the

hexagon nuts A evenly crosswise in several stages to the values speciﬁed in the “Torques” table.

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Flowserve UNA 38 Manuale Utente Pagina 15

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