Tilting Disc Type Check Valves
Date:
prepared:
approved:
Page:
22.03.2005
C.Wied
H.Six
12 of 14
Operating instruction No.:
BUW-510/1-E
11. Repair instructions
11.1. General
⇒
For selection of the correct detail drawing see Section 10.2 or 10.3.
⇒
For parts list, see Section 10.1.
⇒
All information from the type plate must be given when ordering replacement parts. Only original
KROMBACH parts may be installed.
11.2. Replacing the bearing cover gasket (No. 16)
Danger
to life
Before starting work release all pressure from the pipeline system, and empty it
completely!
See also Section 3.3 “Special hazards”!
11.2.1. Unscrew the screws (15), deinstall the bearing cover (14) and remove the gasket (16).
11.2.2. Check and clean the radial groove for the gasket in the cover and the sealing surfaces on
the body.
11.2.3. Lubricate the new gasket (16) with a thin film of mineral oil and place it in the bearing cover
(14). Insert the bearing cover with gasket into the housing and turn several times.
11.2.4. Clean the screws (15) and cover them with a thin film of Molykote Plus or equivalent
lubricant. Insert screws and screw tight.
11.2.5. Put the pipe under pressure. Check the tightness
11.3. Replacing the shaft sealing (Nos. 19)
Danger
to life
Before starting work release all pressure from the pipeline system, and empty it
completely!
See also Section 3.3 “Special hazards”!
11.3.1. Deinstall end plate (20.1) with lever (20.3) and the associated keys (20.9). Before
deinstallation, mark the position of the end plate on the head flange of the armature for
correct subsequent reinstallation.
11.3.2. Remove packing nuts (18) and lift off stuffing box (17). Record their arrangement for correct
subsequent reinstallation.
11.3.3. Remove packing rings (19).
11.3.4. Clean the packing space and the upper shaft end (11) cautiously and carefully.
11.3.5. Cover each new packing ring (19) outside with a thin film of mineral oil. Insert the same
number of new packing rings. For divided packing rings, the new rings must be inserted
with the division offset by 180° in each case.
11.3.6. Cover the threads of the stuffing box (17), stay bolts for the packing nuts with a thin film of
Molykote Plus or similar lubricant, and tighten the packing nuts (18) by hand.