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14.3.3.2 Mounting a concave diaphragm
Diaphragm sizes 25 - 80
Threaded pin type diaphragm:
Recess of the compressor
Diaphragm boss
1. Move the actuator A to the closed position.
2. Diaphragm sizes 25 - 80: Place the compressor loosely on
the actuator spindle, fit the recesses into the guides (see
"General information" chapter).
3. Check if the compressor fits closely in the guides.
4. Screw new diaphragm tightly into the compressor manu-
ally.
5. Check if the diaphragm boss fits closely in the recess of
the compressor.
6. If it is difficult to screw it in, check the thread, replace
damaged parts (only use genuine parts from GEMÜ).
7. When clear resistance is felt, turn back the backing dia-
phragm anticlockwise until its bolt holes are in correct
alignment with the bolt holes of the actuator.
14.3.4 Pulsation damper assembly (actuator on pressure
compensator)
1. Move the actuator A to the open position.
2. Place the actuator A with the mounted diaphragm 2 on the
pulsation damper body 1.
3. Tighten bolts 18, washers 19 and nuts 20 by hand.
(Fastening elements may vary depending on the dia-
phragm size and/or pulsation damper body version.)
4. Move the actuator A to the closed position.
5. Fully tighten the bolts 18 with nuts 20 diagonally.
6. Ensure even compression of diaphragm 2 (approx. 10 to
15%). Even compression is detected by an even bulge to
the outside.
7. Check the fully assembled pulsation damper for leaks.
▶ Service and maintenance:
Diaphragms set in the course of time. After disassembly/
assembly of the pulsation damper, check that the bolts
18 and nuts 20 on the body are tight, and retighten if re-
quired. Retighten the bolts and nuts at the very latest
after the first sterilization process.
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Diaphragm pin
NOTICE
15 Removal from piping
1. Disassemble the product. Observe warning notes and
safety information.
2. Remove in reverse order to installation.
16 Disposal
1. Pay attention to adhered residual material and gas diffu-
sion from penetrated media.
2. Dispose of all parts in accordance with the disposal regu-
lations/environmental protection laws.
17 Returns
Legal regulations for the protection of the environment and
personnel require that the completed and signed return deliv-
ery note is included with the dispatch documents. Returned
goods can be processed only when this note is completed. If
no return delivery note is included with the product, GEMÜ
cannot process credits or repair work but will dispose of the
goods at the operator's expense.
1. Clean the product.
2. Request a return delivery note from GEMÜ.
3. Complete the return delivery note.
4. Send the product with a completed return delivery note to
GEMÜ.
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17 Returns
GEMÜ 652
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