ROTARY CONTROL VALVE BODY ASSEMBLY
FLANGED OR FLANGELESS DESIGN
|I. DESCRIPTION AND SCOPE|
This manual covers the body assembly of the Cashco
Ranger QCT. Available sizes include 1", 1-1/2", 2",
3", 4", 6" and 8" (DN25, 40, 50, 80, 100, 150, 200).
Flangeless DI bodies fi t 150 and 300 lb. RF fl anges.
Flangeless CS and SST bodies, all sizes, fi t 150, 300
and 600 lb. RF fl anges. Integral fl anged CS and SST
bodies, sizes 1" through 3", mate with 150, 300 and
600 lb. RF fl anges. Integral fl anged CS and SST bodies,
sizes 4", 6" and 8", mate with 150 and 300 lb. RF
Flanges. All sizes of fl angeless construction may be
installed between PN40 fl ang es. Quick Change Trim
(QCT) is furnished as a stan dard feature and allows
use of several seal re tain ers and inserts to vary orifi ce
size, help control cav i ta tion and reduce noise. All trims
use 90° plug rotation. Dis as sem bly, in spec tion and
reassembly of the trim can be accomplished easily
without disturbing the packing, linkage or po si tion er
calibration. Trim parts are self-centering.
Either of Cashco's pneumatically actuated actuators,
Model 48 and Model 148, can be mounted to the
Ranger QCT body.
Refer to Technical Bulletin Ranger-TB for complete
tech ni cal specifi cations coupled with either Cashco
Actuator Model 48 or 148.
Refer to following Installation, Operation & Mainte
nance Manuals (IOM’s) for either actuator and/or
devices that maybe mounted to a Model Range body:
ATC-FO – Air-to-Close, Fail Open
ATO-FC – Air-to-Open, Fail Close
CCW – Counter-Clockwise Rotation
CS – Cast Carbon Steel
CW – Clockwise Rotation
CWP – Cold Working Pressure
DIR – Direct Acting
DI – Ductile Iron
IAS – Instrument Air Supply
IOM – Installation, Operation and Maintenance
LOAD – Positioner Output Air Pressure
REV – Reverse Acting
RF – Raised Face
SIG – Output Signal from Instrument
SST – Cast or Wrought 316 Stainless Steel
V – Vent
B. Piping System:
2. If the pipe reducers, elbows, noise at ten u a tion
3. Clean the piping of all foreign debris, including
TABLE 1 – LINE BOLTING REMOVAL CLEARANCE
C. Plug Position for Installation:
NOTE: All ATC-FO valves are shipped from the
|2. For ATC-FO Direct Action Valves with Handwheel|
a. After installation in piping, loosen locking
le ver (59) and turn handwheel (58) CCW
to fully open the plug (6).
b. Check travel indicator (16) to confi rm
valves full open plug po si tion.
c. Tighten locking lever (59).
3. For ATC-FO Direct Action Valves without
NOTE: For shipping and installation purposes
these valves use a mechanical device to temporarilyhold the plug in the closed po si tion. A
slotted “C” washer is positioned on the push
rod (10) between the lower case (2) and the
upper jam nut (43). See Figure 23.
a. After installation of valve in piping, connect
a temporary air supply with an in-line
adjustable airset reg u la tor with gauge to
the actuator top works.
b. Pressurize the actuator to a level 2-3 psig
D. Body Installation:
3. Line Bolting Material must comply with ANSI B16.34
4. Tighten the line bolting evenly and in small in crements
|E. Packing Check:|
1. Ensure that packing fl ange nuts (22) have not
worked loose during shipment.
2. For non-live loaded construction, hand tight en
the nuts (22) enough to stop any leakage. Do
not over tighten.
3. For live loaded construction, if spacer ring
(29) is loose, tighten both nuts (22) equally
|until spacer ring (29) no longer “spins freely”|
using two fi ngers. Rotate both nuts (22) addi
tion al 1/2 revolution for correct packing
load. See Figure 9 for correct orientation of
live-loaded packing design.
1. Insulate the valve body only. Do not insulate
the integral extension bonnet as this could
result in premature packing failure in low or
high temperature services. See Fig ure 3.
FIGURE 3:Insulated Body Flangeless Design
1. Maintenance procedures hereinafter are based
upon removal of the valve/actuator unit from
the piping where installed.
2. Owner should refer to owner’s procedures for
re mov al, handling and cleaning of non re us able
parts; i.e. gaskets, suitable solvents, etc.
3. Valves supplied from the factory do not use
any aid to assist in gasket sealing such as oil,
sealant or pipe dope.
4. Valves originally supplied per Opt-55 require
spe cial cleaning procedures. Refer to Cashco
Specifi cation No. S-1134 for details. When in
|compliance with/to Spec. No. S-1134, the|
valve is suitable for oxygen service. This proce
dure is limited to bodies of SST material
B. Trim Removal:
Access to the cage assembly with internal trim
pieces may be accomplished without removing
the actuator assembly (AA). Thus, it is not nec essary to remove the pack ing set (13) or the stem
subassembly (7) to change internal trims. NOTE:
Plug (6) must be in the closed position to remove
3. If the valve actuator does not include handwheel
a. For ATC-FO Valves: Pressurize ac tu a tor
rod (10) be tween the lower case (2) and
C. Trim Reassembly:
1. Install LN2/4 “lo-noise” insert (25) or “abra sion
2. If at the body assembly (BA) level, ensure
FIGURE 4: Quick Change Trim Parts
4. Slip bearings (4)(5) onto the plug (6) stub
Mechanical Travel Stops - Plug in Closed Position
NOTE: All Sizes - Reorient unit so that the backend
NOTE: The soft seal (10) is not used with anticavitation trim (3) or with some trim des ig na tions.
9. Install washers (23), belleville washers (47) (convexsideup)
D. Stem Removal:
FIGURE 10: Stem Puller
m. Using a suitable solvent acceptable to the owner,
q. Examine packing studs (21) and nuts (22).
4. For Non-Live-Loaded Packing Con struc tion:
NOTE: A small "fl at" area has been milled on the
3. Visually confi rm alignment of hole in re tain er
5. Proceed to Subsection G. for installation of
3. For TFE V-Ring Packing. (See Figure 11.)
With Externally Live-Loaded Construction
c. Carefully place the lower adapter (13.1)
i. Carefully place the upper braided ring
n. For body sizes 3", 4", 6" & 8":
b. Draw down each packing nut (22) in
NOTE: When valve is returned to operation, check
H. Slurry Trim – Opt-AS:
NOTE: A small "fl at" area has been milled on the
7. Place loop controller into “manual” mode. Vary
9. Hereafter, the procedure assumes that actual
10. With one of the control valve station block