cashco C-PRV Handbuch für Installation, Betrieb und Wartung - Seite 2
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3. When stating direction of rotation of the
nut or handle (6), the view is with respect to
look ing down towards the spring chamber or
its' nor mal location.
4. Start with the block valve closed.
5. Relax range spring (7) by turning nut or handle
(6) counter-clockwise (CCW) until rotation
stops. Rotate nut or handle (6) clockwise (CW)
three (3) full revolutions to maintain spring
(7) to di a phragm assembly (16) contact. This
reduces the outlet pressure setpoint.
V. SHUTDOWN
A. In all cases the regulator should be shutdown by
slowly closing the inlet (upstream) block valve.
VI. MAINTENANCE
SYSTEM UNDER PRESSURE. Prior to performing
any inspection and cleaning, isolate the regulator
from the system and relieve all pressure. Failure to
do so could result in personal injury.
A. General:
1. Unit's lock-open feature allows this regulator
to be cleaned in-line, see Section VII.
2. Maintenance procedures hereinafter are based
upon removal of regulator unit from the pipeline
where installed.
3. Owner should refer to owner's procedures for
re mov al, handling, cleaning and disposal of
nonreusable parts.
NOTE: For those fluids which could create a
potential hazard to personnel working on this
unit, owner must provide an OSHA approved
MSDS (Material Safety Data Sheet), and a signed
state ment attesting to the fact that the unit has
been flushed out, for a specific period of time,
using an OSHA acceptable neu tral iz ing agent.
The name of the agent, man u fac tur er's name and
total con cen tra tion level must also be included for
both the service medium as well as the neu tral iz ing
agent. Returns WILL NOT BE ACCEPTED by
Cashco, Inc. without an MSDS form at tached to
the outside of shipping carton.
2
WARNING
WARNING
6. Slowly open the inlet (upstream) block valve
ob serv ing the outlet (downstream) pressure
gauge. De ter mine if the regulator is flowing
and the downstream equip ment is operative.
Rotate the regulator nut or handle (6) CW
slowly until flow begins.
7. Continue to slowly open the inlet (upstream)
block valve until fully open.
8. Develop system flow to a level near its
ex pect ed normal rate and reset the regulator
setpoint by turning the nut or handle (6) CW
to increase outlet pressure or CCW to reduce
outlet pressure.
SECTION V
DO NOT DEAD-END FLOW DOWNSTREAM of the
Model C-PRV as internals may be damaged.
SECTION VI
4. Refer to Figure 3 for basic regulator item
number reference ( ) and description.
B. Trim Replacement:
1. Secure the bottom portion of the plug (17) in
a smooth jawed vise with the spring chamber
(2) directed upwards and the face of the inlet
flange of the body (1) resting on the vise.
SPRING UNDER COMPRESSION. Prior to re mov ing
the clamp (13), relieve spring (7) compression. Failure
to do so may result in flying parts that could cause
per son al injury.
2. Relax range spring (7) by turning nut or handle
(6) CCW until rotation stops. Count and record
the number of revolutions in the box below.
Number of revolutions required to relax
range spring: ________
3. Remove socket head set screw (27) CCW
from end of guide post (18).
4. Remove hitch pin (15) and lift up nut or handle
(6) to remove.
CAUTION
WARNING
IOM-C-PRV