Cashco C-PRV - Manual (Page 2)

IOM-C-PRV 2
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.
6. Slowly open the inlet (upstream) block valve
ob serv ing the outlet (downstream) pressure
gauge. De ter mine if the regulator is fl owing
and the downstream equip ment is operative.
Rotate the regulator nut or handle (6) CW
slowly until fl ow begins.
7. Continue to slowly open the inlet (upstream)
block valve until fully open.
8. Develop system fl ow 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
V. SHUTDOWN
A. In all cases the regulator should be shutdown by
slowly closing the inlet (upstream) block valve.
SECTION VI
VI. MAINTENANCE WARNING
4. Refer to Figure 3 for basic regulator item
number reference ( ) and description.
B. Trim Replacement:
1. Securely install 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 fl ange of the body (1) resting on
the vise.
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
non-reuseable parts.
NOTE: For those fl uids 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
fl ushed out, for a specifi c 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. 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.
3. Remove socket head set screw (27) CCW
from top end of guide post (18).
4. Pull hitch pin (15) and lift up nut or handle (6)
to remove.
CAUTION
DO NOT DEAD-END FLOW DOWNSTREAM of the
Model C-PRV as internals may be damaged.
WARNING
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.
WARNING
SPRING UNDER COMPRESSION. Prior to re mov-
ing the clamp (13), relieve spring (7) compression.
Failure to do so may result in fl ying parts that could
cause per son al injury.
Number of revolutions required to relax
range spring: ________