Disk-type non-return valve
12012, 12013, 12024, 12033 / 12017 / 12019
BA_012013.10_EN
5 / 8 Albert Handtmann Armaturenfabrik GmbH & Co. KG 2018-11-14
Type 12012, 12013, 12024, 12033
Replacing the sealing rings:
• Loosen the grooved union nut and take the connecting piece out of the housing.
• Remove the guide star (5) and spring (4) from the valve rod.
Take the valve rod with valve disk (6) out of the housing.
• For divided valve disks unscrew the bottom part of the valve cone and change the
O-Ring (3). Use screw locking fluid e.g. Loctite 221
• If the valve disks are not divided, take the O-ring out of the disk groove with a dig-
hook.
• Change O-ring (1).
Fig. 1: Schematic representation
1 O-ring
2 Sealing ring
3 O-ring
4 Pressure spring
5 Guide star
6 Valve disk
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