MKS HPS LPV1-25-AC Series, Руководство по эксплуатации и обслуживанию

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HPS HPS
HPS HPS
HPS
®
Square Body LoPro Square Body LoPro
Square Body LoPro Square Body LoPro
Square Body LoPro
Seri es Seri es
Seri es Seri es Seri es
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4.1.3 Solenoid Operated Pilot Valve Operation
Optional installation of a solenoid operated pneumatic pilot valve in the 1/8"
female NPT port in the side of the cylinder (1), as shown in Figure 4,
enables remote electrical control of the valve when direct pneumatic control
is inconvenient. In its de-energized state, this 3-way valve vents the cylinder
of the Square Body LoPro through a threaded hole centered in the top of
the solenoid coil (20). A nipple (24) connects the 1/8" female NPT outlet
port on the solenoid valve to the cylinder of the Square Body LoPro. The
joints are sealed with an anaerobic pipe compound.
When power is applied, the magnetic field developed by the coil overcomes
the force of the spring (22) and lifts the plunger (21) off the seat (23). While
this opens a pressurized flow path from
the pneumatic line connected to the 1/8"
NPT inlet port, it also seals the venting
flow path. Being at the vent port’s
pressure (usually, but not necessarily
atmospheric), the cylinder of the valve is
quickly pressurized and the valve opens
(see section 3.1).
When power to the solenoid is turned off,
the spring forces the plunger back to its
original position, simultaneously closing
the pressurized port and opening the
vent port. Pressurized air in the cylinder
of the valve quickly escapes through
grooves on the outside of the plunger
and out the vent port, allowing the valve
to close (see section 3.1).
Users may supply their own solenoid
operated pilot valve. A solenoid valve
rated for > 10
6 cycles continuous duty
and a conductance > .05 in 3 /min is
recommended. The lengths and
diameters of pneumatic feed lines
must also be considered for peak performance.
Figure 4 - Solenoid pilot valve