TAC Pneumatic Products Catalog

R436
Typical Applications
84
Diaphragm Connections
Refer to figure below. For positive pressure only, connect sampling
line to port E; port F remains open to atmosphere.
For negative pressure only, connect sample line to port F; port E
remains open to the atmosphere.
Two positive samples; connect higher pressure to port E and lower
pressure to port F.
Two negative samples; connect more negative sample to port E;
less negative to port E.
One positive and one negative; positive to port E; negative to port F.
Diaphragm
Positive Only
Lower Negative
Higher Positive
E F
Negative Only
Higher Negative
Lower Positive
Figure 2 Typical Applications.
Electrical
Before any pressure is applied to the
diaphragm, the switch contact rests in the
N.C. position (see figure below). Upon
application of sufficient pressure to actuate
the switch, the contact transfers to the N.O.
position. Connect control, status, and/or
alarm circuits, as shown.
To prove excessive air flow or pressure
C
NC
NO
Status
Alarm
To prove insufficient air flow or pressure
C
NC
NO
Alarm
Status
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