Mounting A Concave Diaphragm; Mounting The Actuator - Gemü R677 Betriebsanleitung

16 Inspection and maintenance

16.3.1 Mounting a concave diaphragm

Recess of the compressor
Diaphragm boss
1. Move the actuator A to the closed position.
2. Check if the compressor is fitted in the guides.
3. Manually screw new diaphragm tightly into the com-
pressor.
4. Check if the diaphragm boss fits closely in the recess of
the compressor.
5. If it is difficult to screw it in, check the thread and replace
damaged parts.
6. When definitive resistance is felt, turn back the diaphragm
until its bolt holes are in correct alignment with the bolt
holes of the actuator.
7. Align the weir of compressor and diaphragm in parallel.
GEMÜ R677

16.4 Mounting the actuator

Diaphragms set in the course of time!
▶ Leakage
Diaphragm pin
After disassembly/assembly of the product, check that
●
the bolts and nuts on the body are tight and retighten if
required.
Retighten the bolts and nuts at the very latest after the
●
first sterilization process.
1. Move the actuator A to the open position.
2. Place actuator A with the mounted diaphragm on valve
body 1.
ð Take care that the diaphragm is in the correct orienta-
3. Screw in bolts, washers and nuts hand tight.
ð Fastening elements may vary depending on the dia-
4. Move the actuator A to the closed position.
5. Open actuator A approx. 50%.
6. Fully tighten the bolts with nuts diagonally.
7. Ensure even compression of the diaphragm (approx. 10 to
15%).
ð Even compression is detected by an even outer bulge.
8. Please note: For a code 5M diaphragm (convex dia-
phragm), the PTFE diaphragm face and the EPDM backing
diaphragm must be positioned level with and parallel to
the valve body.
9. With the valve fully assembled, check the function and
tightness.
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NOTICE
tion.
phragm size and/or valve body version.
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