VERDERAIR VA 25 Air-Operated Diaphragm Pump
Operations Manual - Double Diaphragm Pump
Operations Manual - Double Diaphragm Pump
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Fluid Supply Line<br />
See FIG. 4 and FIG. 5, pages 11 and 12.<br />
1. Use grounded fluid supply lines (G). See<br />
Grounding, page 7.<br />
2. If the inlet fluid pressure to the pump is<br />
more than <strong>25</strong>% of the outlet working pressure,<br />
the ball check valves will not close<br />
fast enough, resulting in inefficient pump<br />
operation. Excessive inlet fluid pressure<br />
also will shorten diaphragm life. Approximately<br />
3 - 5 psi (0.02- 0.03 MPa,<br />
0.21-0.34 bar) should be adequate for most<br />
materials.<br />
Fluid Outlet Line<br />
See FIG. 4 and FIG. 5, pages 11 and 12.<br />
1. Use grounded, flexible fluid hoses (L). See<br />
Grounding, page 7.<br />
2. Install a fluid drain valve (J) near the fluid<br />
outlet.<br />
3. Install a shutoff valve (K) in the fluid outlet<br />
line.<br />
3. At inlet fluid pressures greater than 15 psi<br />
(0.1 MPa, 1 bar), diaphragm life will be<br />
shortened.<br />
4. For maximum suction lift (wet and dry), see<br />
Technical Data, page 23. For best results,<br />
always install the pump as close as possible<br />
to the material source.<br />
10 859.0088
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