Standard Dia-Vac® - Head Connection Configurations

Head Connection Schematic Description Standard Eccentric
Minimum Pressure** /
Minimum Vacuum ** /
CFM at 0 PSIG **		 Systems Applications
Double headed pump, both heads operating independently. Double headed pump,
both heads operating independently.		 40 PSIG Pressure
25 InHg Vacuum
0.9 CFM each head.		 For economical use of 2 heads pumping separately.
Double headed pump, intake lines in common, manifold - parallel. Double headed pump,
intake lines in common,
manifold - parallel.		 40 PSIG Pressure
25 InHg Vacuum
1.7 CFM at 0 InHg.		 For higher capacity at maximum vacuum.
Double headed pump, series connected. Double headed pump,
series connected.		 75 PSIG Limited. *
28 InHg Vacuum
0.9 CFM at 0 PSIG.		 For higher vacuum or pressure where flow requirement is low.
Quad headed pump, all heads in parallel. Quad headed pump,
all heads in parallel.		 40 PSIG Pressure
25 InHg Vacuum
0.9 CFM each head (3.6 total).		 For higher capacity of flow.
Quad headed pump, all heads in series. Quad headed pump,
all heads in series.		 60 PSIG Limited. *
29.5 InHg Vacuum
0.9 CFM.		 For higher capacity of vacuum.
Quad headed pump, parallel connection of two pairs of heads in series. Quad headed pump,
parallel connection of two pairs of heads in series.		 75 PSIG Limited. *
28 InHg Vacuum
1.7 CFM.		 For higher capacity of vacuum & flow.

* Regulated pressure over 75 PSIG shortens bearing and diaphragm life.
** Information based on 75° F at 1745 rpm at 60Hz.

Note: Tube size, distance, sample lines and vacuum / pressure will affect performance output. "Elbows" closely coupled to head as well as "Tees" will also affect output.


Teflon® is a registered trademarks of E. I. du Pont de Nemours and Company
Viton® is a registered trademark of Dupont Dow Elastomers

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