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

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HPS HPS
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Square Body LoPro Square Body LoPro
Square Body LoPro Square Body LoPro
Square Body LoPro
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piston cover and apply a film of a high quality lubricant for elastomer/metal
interfaces, such as Fomblin VAC 3
12 , to the inside of the cylinder. Cycle the
valve several times and reapply the grease.
Manual Actuation
Normally the Square Body LoPro’s dynamic components require very little
lubrication. However, dry environments, high temperatures, and corrosive
atmospheres may exhaust most of the lubricating properties of the greases
used. The least effect of this is to increase the friction on the manual screw,
but could result to damaged components and failure. Actuate the manual
knob to the fully open position and apply a film of a high quality lubricant for
metal/metal interfaces, such as Dow Corning 1122 grease, to the base of
the manual screw. Cycle the valve several times to distribute grease and
reapply if necessary.
8.3.15 Inadequate air pressure – Pneumatic Actuation Only
The specifications define minimum operating pressures for Square Body
LoPro valves. If the pneumatic supply pressure is too low, it must be
increased, (see section 5.2.2 on system pressure limits).
8.3.16 Inadequate air flow – Pneumatic Actuation Only
More difficult to detect than inadequate pressure, low flow may cause slow
actuation of the valve. If the pneumatic line is equipped with a gauge, watch
the pressure as the valve is actuated. If it decreases significantly with each
slow actuation then pneumatic flow is inadequate. Check for kinks or other
blockages in the line. If the low flow is due to demand greater than capacity,
installation of additional capacity must be considered, (see section 5.2.4 on
pneumatic flow).
8.3.17 Limit switch failure – Pneumatic Actuation Only
If a limit switch cannot be activated manually when the cam is at the
opposite switch, replace the limit switches. Check to make sure the valve is
indeed opening and/or closing completely. If these check out, refer to
section 7.4.4 on limit switch adjustment.
8.3.18 Solenoid valve failure – Pneumatic Actuation Only
During long or quickly repeated duty cycles, the solenoid valve’s coil will
normally exceed 70
o C. Voltages lower than specified can increase that
temperature and accelerate the failure of the coil. Incorrect voltages can
cause immediate failure and subsequent replacement of the solenoid
valve’s coil.
12) Fomblin is a registered trademark of Montefluos, Ausimont Group, Montedison Specialty
Chemicals.