Flowserve UNA 23 - Manual (Page 15)

15
Maintenance
– continued –
1. Take heed of note “Danger” on page 4.
2. Undo hexagon-socket screws R. Remove flange S from body V.
3. Remove and clean water-level gauge glass U.
4. Replace water-level gauge glass U and gaskets T in case of visible signs of wear or damage.
5. Clean all gasket surfaces.
6. Apply heat-resistant lubricant to all threads and seating surfaces of the flange
(use for instance WINIX ® 2150).
7. Insert gasket T and water-level gauge glass U. Install flange S and tighten the screws R
alternately and evenly. For torque see table “Torques” on page 15.
Clean / exchange sightglass cover
Attention
Do not change the factory setting of the bellows (thermostatic element).
In case of inadvertent misadjustment restore the factory setting. When the float ball is
pushed right down the dimension 1 (length of bellows) should be as follows:
WINIX ® 2150 is a registered trademark of WINIX GmbH, Norderstedt
1
Type
Size Design Dimension 1
UNA 23h/v, UNA 25h/v, DN 15 - 25 Control unit up to 13 bar (soft bellows) 34.5 mm
UNA 26/h/v, UNA 26h stainless steel
DN 15 - 25 Control unit up to 32 bar (hard bellows) 32.0 mm
DN 40, 50 Control unit 2 up to 32 bar 34.5 mm
UNA 27h DN 15 - 25 Control unit 16 up to 45 bar 32.0 mm
DN 40, 50 Control unit 16 up to 45 bar 51.5 mm
Tools
■ Spanner A. F. 17, 19, 22 and 24 mm to DIN 3113, form B.
■ Allen key A. F. 5, 6, 10 mm to ISO 2936
■ Torque spanner 10 – 60 Nm, 60 – 120 Nm; DIN ISO 6789