5 Maintenance
Service the valve regularly.
Study the instructions carefully and pay special attention to the warnings!
Always use Alfa Laval genuine spare parts. Always keep spare rubber seals, lip seals and diaphagms in stock.
Check the valve for smooth operation after servicing.
Step 2
Mounting plug seal ring by hand
1. Check the seal ring is premounted as described in step 1.
To ensure correct mounting, press with your thumb on the
seal ring, which must be done approximately 10 times and
always with opposite pressure points, from A to B, to C and
D (see drawing 3).
The rest of the seal ring can now be pressed into the groove
so the whole seal ring is mounted. Check that there are NO
“bulge” (see drawing 4).
If there is a little bulge – then use the screwdriver to eliminate
the bulge.
Again press with the thumb on the seal ring and keep the
pressure while rotating 360° (see drawing 3).
2. It is important to release compressed air behind the seal ring.
This is done with a screwdriver and always underneath the
plug as shown (A).
It must be done at one or two different points on the
circumference.
Be careful not to make marks on the surface of the plug and
seal ring (see drawing 5).
Drawing 3
2321-0117
A
D
B
C
Drawing 4
2321-0118
Drawing 5
2321-0115
A
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