Samoa DF30 Manual De Operación Y Mantenimiento página 18

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 DF30
Torques DF50
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 figure.
4. Remove the diaphragm cap.
NOTE: To tighten these screws you must use a torque wrench
calibrated to (see torque table in this page).
5. Remove the cover by gently pulling back.
6. Remove the used diaphragm and place the new one in the proper
position.
Assemble components.
Remove the side cover on the right of the fluid inlet as shown in the
figure, following the procedure to "Replace diaphragms".
Once the shaft is visible, use the following procedures:
1. Remove the shaft from its housing by pulling it from one end.
The Teflon ® sleeve is threaded into the body. To remove use snap ring
pliers in the two holes indicated in the figure.
18 855 821 R. 02/17
SAMOA Industrial, S.A. · Pol. Ind. Porceyo, I-14 · Camino del Fontán, 831 · 33392 - Gijón - Spain · Tel.: +34 985 381 488 · www.samoaindustrial.com
Repair and maintenance procedures
Torques necessary for the proper functioning of the pump
Diaphragm cover
Directional valve
Valve cap
Diaphragm cover
Directional valve
Valve cap
Diaphragm cover
Directional valve
Valve cap
Diaphragm replacement
Pushing rod
3
70.81 lbf·in (8 N·m)
44.25 lbf·in (5 N·m)
30.9 lbf·in (2 N·m) composite
48.67 - 53.1 lbf·in (5,5 - 6 N·m)
44.25 lbf·in (5N·m)
35.4 lbf·in (4 N·m) Aluminium - 30.9 lbf·in (2 N·m) composite
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
2. Once the cap has been removed, remove the quad ring inside the
pump body.
3. Replace the kit following the correct order shown in the assembly
drawing.
Reassemble the pump in reverse order.
1
2
A
4
6
5