Floating Seal
Design
The POSI VALVE makes use of the
floating seal principle which has proven to be the most reliable
way of draining compressed air systems of the unwanted
accumulations of water, oil, sludge, and scale.
How
It Works
As shown in Fig. 1, the valve uses
differential pressure to press the floating seal against the
downstream valve seat. Due to the close contact between the seal
disc and valve seat, a lapping action occurs between them each time
the valve's plunger moves up and down (cycles). This action
maintains the flatness of both faces and actually improves the seal
itself. Wear to these parts is minimal, even after millions of
cycles.
Self-Cleaning
Action
The self-cleaning action provides
reliable service in contaminated systems like compressed air
lines. Each time the plunger moves up and down, the face of
the valve seat is wiped clean by the seal disc. This makes
the valve extremely dependable and desirable for use under adverse
conditions because contaminates likes those found in air systems
are kept from being trapped in the seat.
Straight Through
Flow
When the solenoid is energized, the
plunger and seal are lifted so that the flow of the condensation
can flow straight through the orifice (see Fig. 2). It is the
combination of the straight through flow and the self-cleaning
action of the seal that prevents the valve from clogging. Other
types of solenoid valves force contamination like scale to travel
in a dirt catching "S" shaped flow.
Versatility
The POSI-DRAIN is available as a
complete drain (PD7020) or each component, Timer Controller
(PD7000) and POSI Valve (PV1), can be purchased separately. When
bought separately, the Timer Controller can be mounted remote from
the POSI VALVE. The Timer Controller can actuate up to four POSI
VALVES at once. The NEMA 4X design can be maintained even in the
remote configuration.
Unbeatable
Combination
POSI VALVE combined with our proven
and versatile NEMA 4X timer controller is the POSI-DRAIN, an
extremely dependable and fully adjustable timer drain for
compressed air lines. POSI-DRAIN performs in the tough applications
where others