Diaphragm Replacement - Samoa DF100 Serie Manual De Operación Y Mantenimiento

For proper operation of the pump and to prevent accidents which may damage equipment and in the worst case, people, you must periodically
review the torques of the diaphragms covers and the DIRECTIONAL VALVE. In the next table are shown the appropriate torques for this purpose:
Torques DF100
Before any intervention: DISCONNECT AIR SUPPLY OF THE PUMP.
IT IS NOT NECESSARY TO REMOVE THE PUMP FROM THE FLUID LINE.
1. Close fluid valves.
2. Drain the fluid inside the pump. Anticipate a drainage of fluid from
inside the pump.
3. Remove the directional valve while being careful not to damage the
seals shown in the first figure.
4. Remove the diaphragm cap.
NOTE: To tighten these screws you must use a torque wrench calibrated
to 137.7 lbf·in (15 N·m).
5. Remove the cover by gently pulling back.
6. Remove the used diaphragm and place the new one in the proper
position
Assemble components.
1. Close fluid valves.
2. Drain the fluid from inside the pump. Anticipate a drainage of fluid
from inside the pump.
3. Loosen the screws to remove the directional valve. Take special care
with the seals.
4. Remove the valve cover by loosening the screws with an Allen
wrench. Take note of the orientation of the cap, as it is critical to
replace it correctly during reassembly.
5. Install a new set of valves according to these assembly drawings.
Ensure that the ball guides are assembled as shown in the figure on
the left, and tighten the screws with a maximum torque of 35,4 lbf·in
(4 N·m) (for metal bodies) and 30,9 lbf·in (2 N·m) (for acetal and
polypropylene bodies)
6. Assemble the directional valve with being careful not to damage the
O-rings and tighten the screws with a maximum torque of 44,25
lbf·in (5 N·m).
18
855 807 R.11/10
Samoa Industrial, S.A. · Box 103 Alto Pumarín · 33211 Gijón - Asturias Spain · Tel.: +34 985 381 488 · Fax.: + 34 985 384 163
Repair and maintenance procedures
Torques necessary for the proper functioning of the pump
Diaphragm cover
Directional valve
Valve cap

Diaphragm replacement

Ball valves replacement
137.7 lbf·in (15 N·m)
44,25 lbf·in (5 N·m)
35,4 lbf·in (4 N·m) Aluminium - 30,9 lbf·in (2 N·m) composite
3
A
4
6
5