18
855 819 R. 03/12
Samson Corporation • One Samson Way • N.C. 28778 Swannanoa • Phone: 00 1 8286868511 • Fax: 00 1 8286868533
2012_03_06-17:30
Repair and maintenance procedures
Torques necessary for the proper functioning of the pump
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
Diaphragm cover
137.7 lbf·in (15 N·m)
Directional valve
44,25 lbf·in (5 N·m)
Valve cap
35,4 lbf·in (4 N·m) Aluminium - 30,9 lbf·in (2 N·m) composite
Diaphragm replacement
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.
4
A
6
5
3
Diaphragm replacement (Teflon)
Before any intervention: DISCONNECT AIR SUPPLY OF THE PUMP.
IT IS NECESSARY FOR TEFLON DIAPHRAGMS REPLACEMENT,
TO REMOVE THE PUMP FROM THE FLUID LINE.
1. Follow the steps 1 to 4 from the Hytrel and Santoprene diaphragm
replacement.
2. Remove the diaphragms.
3. With the components supplied in the replacement kit, firstly do the
assmblaje of one of the diaphragms.
3.1
Place the 6,35 x 1.78 o-ring (Pos.4) in the inner groove of
the diaphragm nut (Pos.5).
3.2
With the shaft (Pos.6) in vertical, carefully introduce the
diaphragm nut (Pos.5) in the shaft. Be aware not damaging
the inner o-ring placed before.The exterior groove must be
facing upwards.
3.3
With the help of some mounting grease, place the 18.77x1.78
o-ring (Pos.3) in the exterior groove of the diaphragm nut
(Pos.5).
3.4
Place the diaphragm (Pos.2) with the teflon side in blue,
facing the shaft.
3.5
Finally, after applying some mounting sealent in the
diaphragm washer (Pos.1), thread the washer and thighten
as much as possible with the hands.
1
2
3
4
5
6