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Adjustments and servicing procedures
Single pressure system
The working pressure is determined by the tension of
the spring in the regulating valve (RV). This tension
can be increased to raise the pressure and decreased to
lower it by turning the adjusting wheel clockwise and
anti-clockwise respectively.
To adjust the normal working pressure, proceed as
follows:
1. Loosen the lock nut of the regulating valve.
2. Release Regulating Valve (turn out).
3. With the outlet valves (AOV) closed, adjust the
regulating valve (RV), until a pressure is reached
of nominal pr 2 bar (+ 29 psi).
4. Lock the regulating valve (RV) by fixing the lock
nut.
Dual pressure system (option for XRXS and
XRYS)
The dual pressure system has two regulating valves
marked with I and II and a switch at the rear for
selecting the lower (I) or higher (II) working
pressure.
Set the regulating valve (RV) marked with I at a
working pressure lower than the regulating valve
marked with II. This means the handle of RV I should
be scewed in less than the handle of RV II. This
pressure setting is very important. When done
otherwise the system will not work correctly.
When RV I is set at a working pressure of maximum
25 bar (363 psi), the rpm will increase to 1900 rpm
(instead of 1800 rpm) to deliver more FAD at this
“lower” pressure. RV I can be set at a pressure higher
than 25 bar (363 psi), but then there will be no speed
increase.
ADJUSTMENT OF THE PNEUMATIC REGULATING SYSTEM
(RV)
(AOV)
(
II
)
(
I
)
(RV)
Summary of Contents for XRVS 1300 CD7
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