Cashco 521 User Manual

INSTALLATION, OPERATION & MAIN TE NANCE MANUAL (IOM)

MODEL 521

TOTAL TFE, GLOBE-PATTERN CON TROL VALVE

I. DESCRIPTION AND SCOPE

The Model 521 is a bellows sealed, globe-style control valve fabricated from a tee-block of isostatically com pact ed virgin TFE. Sizes are 1/2", 1", 1-1/2" and 2". The split body jacket is CF8 (304 SST) material. All wetted internal parts are of isostatically compacted TFE material. The standard stem material is of 316 SST; two optional Hastelloy C-276 stem material con struc tions are avail able.

End connections are available to mate with 150#, 300# or DIN PN16, 25 or 40 ﬂ anges. Each ﬂ ange is drilled and tapped to receive stud bolting only.

IOM-521

12-13

BODY IOM

SECTION I

The valve is designed for chemical service with ﬂ uids that are normally corrosive to metallic materials.

For application pressure vs. temperature zone refer to Model 521-TB, Graph No. 1 (pg. 3).

Actuators that may be mounted to a Model 521 body are Cashco Model C27 or Model C53, both ﬁ eld reversible.

II. REFERENCES

Refer to Technical Bulletin 521-TB for complete tech ni cal speciﬁ cations of a Model 521 coupled with either Cashco Actuator C27 or C53. www.cashco.com/techbulletins/521.pdf

Refer to following Installation, Operation & Main te nance Manuals (IOM’s) for either actuator and/or devices that maybe mounted to a Model 521:

Actuators: www.cashco.com/IOM/C27-C53.pdf Positioners: P/P: www.cashco.com/techbulletins/9540l.pdf I/P: www.cashco.com/techbulletins/srd991.pdf I/P: www.cashco.com/iom/PS2iom.pdf

SECTION II

SST.......... Cast or Wrought Stainless Steel

HC ........... Wrought Hastelloy C-276

ATO-FC ... Air-to-Open, Fail Close ATC-FO ... Air-to-Close, Fail Open

CCW ........ Counter Clockwise

CW ........... Clockwise

D or DIR ... Direct Acting R or REV.. Reverse Acting

IAS ........... Instrument Air Supply

IOM .......... Installation, Operation and Maintenance

SIG .......... Output Signal from Instrument

LOAD ....... Positioner Output Air Pressure

V .............. Vent

Model 521

with ATO - FC Actuator

ABBREVIATIONS

Man u al

SECTION III

III. INSTALLATION

A. Orientation

1. Recommended orientation when installed is in a hor i zon tal pipeline with the stem vertical. Valves may be installed in a vertical or hor i zon tal pipeline with the stem between vertical and horizontal.

2. Outdoors, all installations may be oriented at any angle from horizontal-to-vertical, as per A.1. above.

3. Model 521 valves should not be installed with the stem oriented below horizontal/ down wards.

4. In no case is additional weight to be applied to the actuator assembly when installed in an ori en ta tion other than vertical.

WARNING

The valve/actuator unit should not be used as a “step” to sup port per son nel. Failure to comply may cause leak age at the bonnet/body joint, al low ing pos si ble con tact with harm ful ﬂ uids.

2. If pipe reducers are located before and/or after the valve body, keep the reducers as close as practical to the valve body; this is especially important where the reducers are more than one line size larger than the valve body size, which is common in gaseous ser vice.

3. Clean the piping of all foreign debris, including chips, weld scale, weld splatter, oil, grease, sand or dirt prior to installing the control valve; THIS IS AN ABSOLUTE REQUIREMENT.

4. Field hydrostatic testing the completed piping system, including the Model 521, to 1-1/2 x CWP in di cat ed on Model 521 name plate is ac cept able. If hydro test pres sure ex ceeds the 1-1/2 x CWP limit, the 521 must be re moved for such testing. Before pres sur iza tion, the valve plug should be lifted from the seat if of re verse, ATO-FC action.

5. Flow Direction: Install so the ﬂ ow direc- tion match es the arrow cast on the valve body.

6. Valves are not to be direct buried un der ground.

B. Piping System

1. It is recommended that the control valve unit be installed with a double-block and bypass as indicated in Figure 1. This arrangement is recommended especially where main te nance will be done on the valve body while still installed in the pipeline.

Figure 1: Typical Control Valve Station

7. Insulation may be applied as indicated in Fig ure 2. Drainage from the packing area must be ensured when fully installed, sealed and lagged for outdoors installation. Vented pipe plug (12) should not be covered.

Figure 2: Body Insulation

8. Undue piping stress/strain or bending torques may not be transmitted thru the control valve body. One pipe (inlet or outlet) should be anchored rigidly for piping that is “hot” or “cold” with respect to ambient

IOM-5212

tem per a ture; the re main ing pipe (inlet or outlet) should be sup port ed and guided to ensure uni di rec tion al ex pan sion/con trac tion. Properly align prior to installing valve with required ﬂ ange bolting.

9. The Model 521 is designed for a ﬂ anged con nec tion that is gasketless. The raised face portion of end con nec tion ﬂ ange serves as the gasket.

10. An ANSI/DIN adapter gasket (17) is supplied with all Model 521 valves provided with DIN 16/25/40 end con nec tions. See Figure 3. The purpose of this adapter gasket (17) is to en sure prop er compression of the body’s TFE core (1.2) when used with DIN piping.

To assist during installation, place pipe

thread sealant on one side of adapter gasket (17), and press the sealant covered side of the adapter gasket over the exposed TFE of the body core (1.2) end connection. The sealant will hold the adapter gasket (17) to its proper location prior to joining with a piping ﬂ ange.

TABLE 1

Body Size End Connection Flange Bolting

In. (DN) 150# 300# DIN 16/25/40

1/2" DN15

1" DN25

1-1/2" DN40

2" DN50

No. Bolt Holes 4 4 or 8 * 4

1/2" Ø - 1-3/4"

13 UNC-2B

1/2" Ø - 2"

13 UNC-2B

1/2" Ø - 2-1/2"

13 UNC-2B

5/8" Ø - 2-1/2"

11 UNC-2B

* 2" - 300 # requires 8 bolt holes; all others 4.

1/2" Ø - 1-3/4"

13 UNC-2B

5/8 Ø - 2"

11 UNC-2B

3/4" Ø - 2-3/4"

10 UNC-2B

5/8" Ø - 2-3/4"

11 UNC-2B

14 mm Ø - 45 mm

M12x1.75-6H

14 mm Ø - 52 mm

M12x1.75-6H

18 mm Ø - 70 mm

M16x2.0-6H

18 mm Ø - 70 mm

M16x2.0-6H

12. Tighten ﬂ ange stud nuts uniformly in a cross- ing pattern. Ensure ﬂ ange facing align ment. Do not use ﬂ ange bolting to “pull” ﬂ ang es into alignment. Tighten ﬂ ange bolting to torque levels of Table 2 in increments of 1/2 rev o lu tion to ensure uniform loading of valve’s raised facing.

TABLE 2

Body Size End Connection Flange Bolting

In. (DN) ANSI-150 ANSI-300 DIN 16/25/40

1/2" DN15 10 - 12 ft-# 10 - 12 ft-# 15 - 18 N-m

1" DN25 10 - 12 ft-# 12 - 14 ft-# 21 - 25 N-m

1-1/2" DN40 10 - 12 ft-# 14 - 17 ft-# 18 - 22 N-m

2" DN50 35 - 40 ft-# 17 - 20 ft-# 50 - 60 N-m

Figure 3: ANSI/DIN Adapter Gasket

11. Flange bolting must be of the stud-type. Each ﬂ ange is drilled and tapped to accept studs. The studs should be of a length to penetrate the full depth of the bolt hole thru the ﬂ ange; DO NOT USE STUDS/BOLTS OF TOO SHORT LENGTH. See Table 1 for stud size/thread/length requirements.

IOM-521

Figure 4: End Connection - Partial Section

NOTE: If the installed Model 521 has had

the ﬂ ange bolting over-torqued, distortion of TFE core (1.2) will occur. If dimension “X” in Figure 4 is 0.040" (1 mm) or less, a gasket is rec om mend ed upon reinstallation. If dimension “X” is less than 0.020" (0.5 mm), body re place ment is recommended.

C. Auxiliary Detection:

1. When a ﬂ uid is known to permeate TFE over a ﬁ nite time period and the ﬂ uid is lethal or is subject to stringent limits of fugitive emis sions, the vented pipe plug (12) should be removed and one of, or a com bi na tion of, the following methods should be considered to

monitor the integrity of the internal primary stem (9) seal – the bellows sub-assembly (8):

a. gas detector with alarm b. pressure indicating gauge c. pressure switch with alarm d. inert gas, constant ﬂ ow purge.

SECTION IV

IV. STARTUP

A. General:

1. Ensure that the Model 521 unit has been properly adjusted and calibrated, including the po si tion er, if in stalled.

2. Recommend startup to be in “manual” mode. This procedure assumes double block (iso la tion) and bypass valves for the “control valve station" per Figure 1.

3. Start with either of the two block valves closed, with the other open. The bypass valve should be closed. Pres sur ize system if possible/prac ti cal.

4. Back out the airset’s adjusting screw until loose.

5. Turn on air supply pressure.

6. Adjust the air supply airset (ﬁ lter-regulator) to the proper level as indicated in the technical bulletin 521-TB. DO NOT STROKE THE CON TROL VALVE WITH AN AIR SUPPLY PRESSURE SET TING GREATER THAN REC OM MEND ED MAX I MUM PRESSURE!

7. Place loop controller into “manual” mode. Vary setting from minimum – mid-range— maximum SIG out put. Ob serve response of control valve unit to these changes of input SIG. The valve should fully stroke at the variation from minimum SIG to maximum SIG; the mid-range SIG should have the valve stem travel at/near 1/2 open.

8. Conﬁ rm that action of controller and po si- tion er – direct or reverse – are producing the desired response in the control unit. Conﬁ rm that the control valve “fail” position is as re quired.

9. Hereafter, the procedure assumes that actual ﬂ uid ﬂ ow may be established. This may not be practical/pos si ble in all cases; if so, vary pro ce dure as required.

Always “heat” or “cool” down the system

pip ing SLOW LY by opening the control valve station bypass valve in small increments.

10. With one of the control valve station block valves still closed, and the loop controller still in “man u al” mode, open bypass valve and vary ﬂ ow rate manually to observe the re sponse of the controller and control valve unit to geth er.

11. Attempt to develop manual control of the loop by opening/closing the manual bypass as required, or by manually controlling main stream ﬂ ow as required.

12. When the control valve is partially open, crack open, slowly, the closed block valve while si mul ta neous ly clos ing the bypass valve; it may be necessary/desirable to vary the man u al output SIG from the controller si mul ta neous ly also. Continue this procedure until the by pass is closed and the block valves are both fully open. The system is still under “manual” mode control, but all ﬂ ow is passing thru the control valve.

CAUTION

DO NOT WALK AWAY AND LEAVE A MANUALLY CONTROLLED CONTROL VALVE UNATTENDED!

13. Vary controller “manual” SIG output until match ing the “automatic” SIG output, then change the mode of the controller over to “automatic”, and the loop will ex pe ri ence a minimum of upset conditions, and will be in

automatic control.

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SECTION V

V. MAINTENANCE

WARNING

Model 521 control valves fre quent ly are installed in haz ard ous/le thal ﬂ uid ser vic es. Be fore re mov al from pipe line or any level of dis as sem bly, con sult the Own er’s safety pro ce dures for proper ﬂ ushing, clean ing and han dling of a valve ex posed to po ten tial ly haz ard ous ﬂ uids dur ing de-pres sur iza tion and re mov al. Owner's safe ty procedures pre empt any state ments or rec om men da tions con tained in this IOM.

A. General:

1. Once ﬂ uid pressure has been iso lat ed by block valves, and piping ﬂ ange bolting has been only loos ened, care ful ly re move vented pipe plug (12) from the bonnet (2), applying the detection procedures of C. 1. above, as a small quantity of ﬂ uid may be “trapped” in the void space of the bellows (8) interior due to permeation. The plug (12) has a “groove” notched in its threads to assure venting prior to the threads fully disengaging. Once fully vented and/or purged as required by safety procedures, reinstall the plug (12) using a ﬂ uid compatible lubricant . DO NOT USE THREAD SEAL ANT FOR VENT ED PIPE PLUG (12) ON RE IN STAL LA TION.

6. The stem sub-assembly (9) is designed for non-rotation when installed. DO NOT AT TEMPT TO RO TATE WITH THE STEM SUB-ASSEMBLY IN STALLED; FAILURE TO HEED MAY CAUSE DAMAGE TO THE STEM SUB-ASSEMBLY (9), THE BELLOWS SUB-AS SEM BLY (8), THE PLUG (3) AND/OR THE BODY ASSEMBLY(1). Exhibit special care when handling the stem (9) sur face where it contacts the packing (6).

B. Pressure Boundary Leakage Shop Test:

1. Secure the body assembly (BA) in a vise with the valve stem (9) oriented vertically.

2. Remove vented pipe plug (12).

3. Install a pipe nipple, test pressure gauge and isolation valve into the 1/8"-NPT (female) open ing. (See Figure 5.)

2. Maintenance procedures hereinafter are

based upon removal of the valve/actuator unit from the pipeline where installed.

3. Owner should refer to Owner’s procedures for re mov al, handling and cleaning of nonreuseable parts and suitable sol vents, etc.

4. Valves supplied from the factory do not use any sealing aids for the gasket such as oil, sealant, or pipe dope in the wetted portions of the valve body as sem bly. Sealing aids should not be required and are not rec om mend ed.

5. All indicated Item Numbers that are with re spect to actuator assembly (AA) will be in pa ren the sis and un der scored; i.e. (20). All Item Num bers that are with respect to the body assembly (BA) are not underscored; i.e. (32). Reference with respect to the positioner is in double parentheses; i.e. ((AP)).

Figure 5: Pressure Boundry Testing Conﬁ guration

4. Place a suitable adhesive tape (“duct tape”) around the perimeter of the bonnet/body ﬂ ange. Place tape on the “joint lines” of the shell halves (1.1) (see Figure 10). Place blind ﬂ ang es over the ﬂ anged end connections and bolt down; one of the blind ﬂ anges must have a hole thru the face; place tape over the opening of the blind ﬂ ange.

5. Using a source of acceptable ﬂ uid such as ni tro gen gas, pressurize the bellows “void zone” to 30 psig (2.1 Barg). Tightly close off the isolation valve of 3. above. Disconnect the pressure source.

6. Poke small holes in the tape at the bonnet/ body ﬂ ange and at the opening in the blind ﬂ ange.

IOM-521

7. For units with Reverse Action (ATO-FC) ac tu a tors pressurize to a level sufﬁ cient to initiate travel to approximately mid-stroke to hold the plug (3) away from the body (1) seat.

6. Loosen stem nut (20) by rotating nut CW (viewed from above) to base of threads.

7. Loosen packing (6) by turning packing gland nut (5) CCW 2-3 revolutions.

8. Apply leak detection ﬂ uid to all the potential leak paths: a. Packing gland nut (5). (Tighten as nec es-

sary.) b. Body (1)-to-bonnet (2) ﬂ ange tape hole. c. Body (1) and bonnet (2) bolting (13, 14,

1.3, 1.4, 1.5). d. End connection blind ﬂ ange tape hole. e. Test pressure piping con nec tions.

9. If leakage occurs at: a. a. above, there is a packing (6) or a pack-

ing (6) /stem sub-assembly (9) failure.

b. b. above, there is a bonnet gasket (11)

failure.

c. c. above, there is a bonnet gasket (11),

or TFE core (1.2) failure.

d. d. above, there is a bellows sub-as sem bly

(8) failure.

10. Following this test procedure may help to solve main te nance problems when combined with visual ex am i na tion of disassembled body assembly (BA).

8. Rotate yoke nut (15) CCW to fully loosen nut.

9A. For ATO-FC Reverse Action Actuators:

a. Connect a temporary air source

to the actuator and pressurize the actuator to upper limit of the bench range speciﬁ ed on the valve name plate. (Pressure will lift the plug head

(3) away from the body's (1) integral seat until the plug (3) is 100% open.)

b. Place a wrench on the hex surface of

the swivel lower knuckle (44) and rotate knuckle CCW (viewed from above ac tu a tor) until lower knuckle dis-engages from stem (9). Keep track of the number of full rev o lu tions to dis-engage and record here. _______________

c. Maintain lift support from above the

C. Separation of Body/Actuator:

1. Reference the Actuator IOM-C27-C53 for item number call outs and drawings for actuator.

2. Secure the body in a vise with the actuator assembly (AA) oriented vertically. Place matchmarks between the body (1) bon net ﬂ ange, the bonnet (2) ﬂ ange, and the yoke (3) to assist in ﬁ nal ori en ta tion when the body is dis as sem bled and/or the ac tu a tor removed. If actuator has handwheel - see Actuator IOM for removal instructions.

3. Secure and rig the actuator assembly (AA) for a ver ti cal lift using an overhead hoist. Remove slack from rigging.

4. This procedure assumes that the body as sem bly (BA) has been fully assembled thru the bonnet (2), including the packing gland nut (5) and packing (6).

5. Remove vented pipe plug (12) from body.

Figure 6: Swivel-Type Connector

actuator assembly (AA). Dis-engage (slide) the swivel lower knuckle (44) out of the upper knuckle (43) slot.

9B. For ATC-FO Direct Action Actuators:

a. Place a wrench on the hex surface of

b. Maintain lift support from above the

actuator assembly (AA). Dis-engage (slide) the swivel lower knuckle (44) out of the upper knuckle (43) slot.

IOM-5216

10. Raise the actuator assembly (AA) over stem (9). Release any ac tu a tor air pressure. Lay actuator assemby aside on work surface.

D. Body Disassembly:

1. Access to body assembly (BA) internals may be accomplished with the actuator assembly (AA) intact with the bonnet (2) (i.e. locknut (15) is still fully tight ened), or with the body assembly (BA) separated as per above para graph V.C. Steps 1-10.

2. Maintenance procedures hereinafter are based upon the actuator assembly (AA) fully in ter con nect ed with the valve stem assembly (9) during disassembly.

3. Secure the body in a vise with the actuator assembly (AA) oriented vertically upwards. Place matchmarks between the body (1) bon net ﬂ ange and the bonnet (2) ﬂ ange to assist in ﬁ nal ori en ta tion when the body is dis as sem bled and/or the ac tu a tor removed.

The valve body (1) is ma chined after the shell

halves (1.1) have been bolted (1.3, 1.4, 1.5) around the TFE core (1.2). Dis as sem bly of the body sub-assembly (1) will cre ate align ment problems during reassembly. The TFE core (1.2) is not replaceable, except as a body sub-as sem bly (1).

10. Make a visual inspection of the trim portions still in ter con nect ed to the actuator assembly (AA) for ob vi ous problems.

11. Hand-grasp the bellows sub-assembly (8) and rotate CCW (viewed from plug (3) end) to removal. Do not use any wrench,

vise, etc., for grasping the bellows subassembly (8)! The bellows (8) should only

be hand-tight.

12. Loosen packing gland nut (5) 2-3 revolutions out of the bonnet (2) by rotating CCW (viewed from stem (9) end).

13. Loosen jam nut (20) 1-2 revolutions.

4. Secure and rig the actuator assembly (AA) for a ver ti cal lift using an overhead hoist. Remove slack from rigging.

5. Loosen all bon net cap screws (14) ap prox i mate ly 1/4" (6 mm) by rotating CCW (viewed from above).

6. Raise actuator assembly (AA) with overhead hoist approximately 1/8" (3 mm).

7. Continue to loosen and remove bonnet cap screws (14 and lockwashers (13).

8. Using overhead hoist, lift the actuator as sem bly (AA) with the interconnected valve stem sub-as sem bly (9), bellows sub-assembly (8), bonnet (2), bonnet spacer (19), locknut (15), packing gland nut (5), packing rings (6), Belleville spring washers (7), bonnet gas ket (11), plug (3) and plug retainer (4). Lay this as sem bly down on a horizontal work surface carefully, so as to not damage the valve’s internals.

9. Make a visual inspection of the body subassembly (1) exterior, which includes two shell halves (1.1), TFE core (1.2), and four body cap screws (1.3) with body nuts (1.4) and lock wash ers (1.5).

NOTE:

OF THE BODY SUB-ASSEMBLY (1)!

DO NOT DISASSEMBLE THE PARTS

14. Grasp the valve’s stem sub-assembly (9) in the lower area (normally surrounded by the bellows (8.1)) using soft jawed pliers to pre vent marring stem surface. Place a wrench on the hex surface of the swivel lower knuckle (44) and rotate knuckle CW (viewed from plug (3) end) until lower knuckle dis-engages from stem (9). Keep track of the number of full rev o lu tions to dis-engage and record here. _______________

15. Retract the stem sub-assembly (9) down wards thru the bonnet (2) until stopped by locknut (20). Rotate lock nut (20), CCW until it is removed.

16. Fully withdraw stem sub-assembly (9).

17. Visually inspect parts for wear, general cor ro sion, localized corrosion, dirty service ﬂ uid, uneven alignment, seat leakage wire draw ing, excess plug-to-seat loading, ﬂ ange fac ings, looseness of plug-to-bellows con nec tion, primary seal at TFE Core (1.2)

-to-bel lows (8.1) joint, secondary seat at bonnet gasket (11) (See Figure 9), blisters on TFE sur fac es, etc.

18. Attempt to determine the reason for a failure. Evaluate if process conditions need cor rec tion, if alternate materials are required for the stem sub-assembly (9), or if effects of

IOM-521

pos si ble permeation need considerations similar to those outlined in Section III.C.1.

E. Plug, Bellows, or Both Replacement:

1. Disassemble the body assembly (BA) per V.D.1.-11. previous.

2. Hand-grasp the bellows sub-assembly (8) and hand-rotate the plug head (3) until the plug retainer strip (4) ends come into view thru the slot located on the side of the plug head (3).

3. Using a pointed end pick tool, get under one end of the plug retainer strip (4) and extract thru the plug’s (3) slot. Manually rotate the plug head (3) end to allow more of the plug retainer strip (4) to be extracted. When able to grasp with needle nose pliers, lightly pull the plug retainer strip (4) and rotate the plug head (3) as necessary until the strip (4) is fully re moved.

4. Slide plug head (3) off the stub-end of the bellows sub-assembly (8).

5. Discard the plug head (3), if worn. Always discard the plug retainer strip (4); only use a new plug retainer strip (4) at reassembly.

6. Do not attempt to ﬁ eld remove embedded nut (8.2) from inside the bellows (8.1); these parts are only available as a sub-assembly (8). If embedded nut (8.2) is badly corroded, re place the entire bellows sub-as sem bly (8) and give strong consideration to alternate ma te ri als for stem sub-assembly (9) and bellows nut (8.2). If em bed ded nut (8.2) is “loose”, consider po ten tial causes and re place bellows sub-as sem bly (8).

F. Packing Ring Replacement:

1. Disassemble the body assembly (BA) per V.C. previous, including separation of body as sem bly (BA) from actuator assembly (AA).

2. Loosen packing gland nut (5) until fully disengaged from bonnet (2) by rotating CCW (viewed from stem (9) end). Remove packing rings (6) from packing box (re cess) in bon net (2).

3. Examine wall surface inside the bonnet (2) for any sign of cor ro sion.

4. Hone the bonnet’s (2) packing box to a #16 RMS ﬁ nish. Burnish the stem sub-assembly (9) to a #4 RMS ﬁ nish in the packing (6) contact area.

G. Reassembly of Body Assembly:

1. Place body assembly (BA) (1) in a vise with the bonnet (2) end directed upwards.

2. Join the stem sub-assembly (9) to the bellows sub-assembly (8) (with new plug head (3) already installed) by ro tat ing the stem's (9) lower end into em bed ded nut (8.2) CW (viewed from bellows (8.1) open end). Rotate the stem sub-assembly (9) as far as possible while hand-grasping the bellows (8.1) DO NOT USE A WRENCH IN THIS OP ER A TION. A light coat of Fluorolube (™ of Occidental Chem i cal Co.) lubricant may be applied to the en gaged (threaded) end of the stem sub-assembly (9) if ﬂ uid com pat i ble.

3. Place spacer washer (10) over the threaded upper end of stem sub-assembly (9).

7. If bellows sub-assembly (8) is to be reused, thor ough ly clean the valleys of the bellows (8.1) con vo lu tions (inside and outside) for the smallest of debris. Clean the grooves of the bellows (8.1) and the plug head (3) where the plug retainer strip (4) locates.

8. Place the plug head (3) over the bellows sub-as sem bly (8) end. Insert a new TFE plug re tain er strip (4) into the slot/groove. Rotate the plug head (3) as necessary while feeding the strip (4) until the strip (4) is fully located into the groove. (No cutting of the

strip (4) should be required.)

4. Referring to Figure 7 for proper orientation and quantity of Belleville spring washers (7), place the spring washers (7) over the upper end of stem sub-assembly (9).

5. Position a new bonnet gasket (11) into recess of body sub-assembly (1).

6. Observe the underneath side of bonnet (2) where square recess is located. Position com bined bellows sub-assembly (8) and stem sub-assembly (9) so that the antiro ta tion "stop" (square part of stem)is aligned to slip into the bonnet’s (2) square recess.

IOM-5218

1/2" (DN 15) & 1-1/2" (DN 40) Body Sizes

1" (DN 25) Body Size

and align ment of parts (10) (8) (11) (7), re move temporary spacer while continuing downward force on the stem (9) while si mul ta neous ly holding the bonnet (2) from drop ping down wards.

13. Lower bonnet (2) carefully downwards into the recess of the body sub-assembly (1) while con tin u al ly applying downward force on the stem (9).

14. At this point, downward force on stem (9) may be exchanged for down ward force on the bon net (2). Hand-tighten all bonnet cap screws (14); relax down ward force on bonnet once cap screws have taken up all slack.

15. Using a torque wrench, tight en bonnet cap screws (14) in alternating cross-pat tern in 1/4 rev o lu tion in cre ments to 40 ft-# (55 N-M).

CAUTION

2" (DN 50) Body Size

Figure 7: Belleville Spring Washer Orientation

7. Center the loose parts (10) (7) surrounding the stem (9) as close as possible.

8. Position the bonnet (2) over the exposed upper stem sub-assembly (9), ensuring that the anti-rotation "stop" (square or ﬂ at surface of the stem) is properly en gaged into the bonnet (2) square recess.

9. Place a temporary spacer device (screw driv er blade, nuts, plain washers, etc.) equallyspaced on the body (1) ﬂ ange to hold the bonnet (2) up, as bonnet is lowered into the body, maximizing the gap between the bonnet ﬂ ang es (1) (2).

10. Place anti-seize thread lubricant on bonnet cap screws (14). Engage all bonnet cap screws (14) with lockwashers (13) ap prox i mate ly 1-1/2 revolutions.

11. Visually observing the gap between the bon net (2) lower ﬂ ange surface and the body sub-assembly (1) bon net ﬂ ange, ap- ply downward force tend ing to seat the plug end (3). This will pull the bellows (8.1) into proper position for the primary bon net seal.

12. When visually satisﬁ ed of concentricity

Improper bonnet bolting torques may lead to premature failure of the primary and secondary bonnet seals.

16. Engage threaded, vented pipe plug (12) into the 1/8" NPT tap on the bon net (2) if it was removed. If a lubricating oil is compatible with the ﬂ uid, a light coat ing will aid in pre vent ing galling of the plug (12). En sure that the tip of the notch on the threads is in the bonnet (2) at least 1-1⁄2 revolutions. Do not overtighten to min i mize chanc es of galling.

Do not use thread sealing com pound that

might “ﬁ ll in” the notch and negate the pur- pose of the notch.

17. The packing ring set (6) de sign is identical for all unit body sizes. It consists of seven V-rings (6.1) and one each male (6.2) and female (6.3) adapter. (See Figure 8.)

The

purpose of the packing rings (6) is to minimize moisture ingress, and to serve as a sec ond ary stem seal in the event of bellows sub-as sem bly (8) failure.

Carefully install rings (6) as indicated in

Fig ure 8, one at a time, using a hollow tool to press the rings (6) to their ﬁ nal position. Take care in slipping the rings (6) over the threaded end of the stem (9) so as to not mar the ring’s (6) internal surfaces. Do not reverse ori en ta tion for vacuum service. Do

not “split” rings (6) for ease in replacement. Do not reuse re moved packing rings (6).

IOM-521

Figure 8: Packing Ring Set

18. Place anti-seize thread lubricant on threads of packing gland nut (5). Place gland nut (5) over the stem (9) end and engage with the bonnet (2) by rotating CW (viewed from ex posed stem (9) end); continue ﬁ nger- tight en ing to the point of resistance. Wrench tighten gland nut (5) 1/8 revolution past the manual tightening re sis tance point.

19. Place bonnet spacer (19) down over threaded portion of the bonnet (2).

4. This procedure assumes that bonnet (2) has been bolted to the body sub-assembly (1).

5. Engage stem jam nut (20) to body as sem bly’s stem (9) by rotating CW (viewed from valve stem (9) end). Rotate jam nut (20) all the way to root of the stem (9) threads.

6. Lower actuator assembly (AA) until the open ing of the actuator yoke (1) is at the level of jam nut (20).

7. Place yoke nut (15) over valve stem (9) and lower the nut to rest upon the yoke (3).

8. Push valve stem (9) downward towards seat ing po si tion. NOTE: The valve bellows

(8) may give “spring action” to keep the plug (3) par tial ly away from the seat.

9. For Direct Action ATO-FC Only: Connect a temporary air supply hose that has an adjustable airset with gauge connected at the lower actuator inlet. Pressurize actuator to a sufﬁ cient level to the upper pressure level of the bench setting; i.e. for 5–15 psig (.34–1.03 Barg) range, set pres sure at 15 psig (1.03 Barg).

20. Valve body assembly (BA) is completed, and may be pressure tested up to 275 psig x 1.5 = 413 psig (19.0 Barg x 1.5 = 28.5 Barg) at ambient tem per a ture. Before pressurizing for hydro, ensure that plug (3) is away from body (1) seat. NOTE: Use soft gas kets on

body as sem bly (BA) end ﬂ anges to prevent dis tor tion of TFE ﬂ ange fac ings.

H. Mounting Actuator Assembly to Body

Assembly:

1. Reference Actuator IOM-C27-C53 for item number call outs and drawings for actuator. This procedure assumes that accessory plate ((AP)) or indicating washer (51) was not removed or has been secured to the actuator stem(6) by the swivel upper knuckle (43) - tighten with 20-30 ft.lbs. (27-40 N M). DO NOT allow actuator stem (6) to rotate. Secure ﬂ ats on bottom of stem (6) when rotating knuckle (43).

2. Secure the body as sem bly (BA) in a vise with the valve stem (9) oriented vertically.

3. Rig actuator assembly (AA) to be supported from above.

10. Apply Loctite Nickel Anti-Seize to grove and top surface of swivel lower knuckle. Engage (slide) the lower knuckle (44) into the upper knuckle (43) saddle.

11. Continue lowering the actuator assembly (AA) until the swivel lower knuckle (44) connector and the valve's stem (9) just touch. NOTE: For ATO-FC may need to

slowly reduce air pressure in the actuator to connect the stem and knucle.

12. Thread yoke nut (15) onto bonnet (2) threads by hand as far as possible to help stabilize topworks. Wrench-tight en one-half (1/2) extra revolution.

13. Engage valve stem (9) threads to swiv el lower knuckle (44). Rotate swivel knuckle (44) CW (viewed from actuator end) to engage with valve stem (9), refer to V.C. Steps 9A or 9B for the number of rev o lutions recorded to dis-engage the lower knuckle.

14. Remove overhead rigging to allow ac tu a tor assembly (AA) to fully rest on the bonnet (2). Refer back to V.C. Step 2 for alignment of match marks. Hand-tighten yoke nut (15).

IOM-52110

15. For Direct Action ATC-FO Only: Release all air pressure from actuator assembly (AA), see step 9 previous and remove temporary air supply.

16. Re-tighten packing gland nut (5).

VI. CALIBRATION

17. Tighten yoke nut (15) to 85 ft--# (115 N-M)

18. Calibrate actuator to valve per Section VI.

SECTION VI

A. General:

1. This section only covers calibration of this control valve with Actuator Models C27-C53.

2. Positioner, if installed, requires reference to the spe ciﬁ c positioner model IOM for proper cal i bra tion pro ce dure.

3. All indicated Item Num bers that are with re spect to IOM-C27-C53 will be in pa ren the sis and un der scored; i.e. (20). All Item Num bers that are with respect to this IOM521 are not un der scored; i.e. (32).

B. Procedure – Reverse Ac tion, ATO-FC:

1. Reference the name plate (40) at tached to the actuator yoke (3). De ter mine the bench set ting of the installed range springs (10) from the name plate (40).

2. Connect a temporary air supply with an inline ad just able airset reg u la tor and gauge to the lower actuator con nec tion. DO NOT LOAD with any air pressure at this point.

3. To determine when stem/plug (9) begins to lift out of the seat, touch the stem below the jam nut with one ﬁ nger. (Stem will begin to move when actuator pressure exceeds the spring load.)

4. Slowly pressurize the ac tu a tor to a pres sure equal to the lower pres sure level of the bench setting; i.e. for 5-15 psig (.34–1.03 Barg) range, set pressure at 5 psig (.34 Barg). Take note of pressure reading when the stem ﬁ rst begins to move.

5. If the loading pressure for the start of stem movement is below the lower end of the desired bench setting, then the com bined stem (9, 6) length is too short. a. Rotate jam nut (20) down to base of

threads on stem (9).

b. Increase pressure in the actuator to

approximately mid range of the bench setting.

c. Rotate lower knuckle (44) CCW to in-

crease the combined stem length. DO NOT allow actuator stem (6) to rotate in the actuator.

d. Release all pressure from the actuator

and repeat Step 4 previous.

6. If the loading pressure for the start of stem movement is above the lower end of the desired bench setting, then the com bined stem (9, 6) length is too long. a. Rotate jam nut (20) down to base of

threads on stem (9).

b. Increase pressure in the actuator to

approximately mid range of the bench setting.

c. Rotate lower knuckle (44) CW to shorten

the combined stem length. DO NOT allow actuator stem (6) to rotate in the actuator.

d. Release all pressure from the actuator

and repeat Step 4 previous.

7. Observe the location of the in di ca ting washer (51) to the "C" mark on the in di ca tor plate (23), mak ing sure to use the “top edge” of the in di ca ting washer (51) as the ref er ence point. Adjust indicator plate as needed.

8. Remove vented pipe plug (12) from the neck of the bonnet (2).

9. Slowly increase the pressure in the actuator until the indicating washer (51) is in alignment with the "O" mark on the indicator plate. As pressure increases, thru the hole where the vent ed pipe plug (12) was re moved, watch for the anti-ro ta tion al "stop" (square or ﬂ at surface of the stem) to appear.

IOM-521

NOTE: This "stop" should not function as

an up travel stop and push up against the bonnet (2) (metal to metal). A gap of approximately 1/16" (1-1/2 mm) should exist between these two surfaces.

NOTE: The purpose of a correct calibration

of the stem stroke is to cause the up travel to be limited by the actuator travel stop nut.

10. To limit the up travel, rotate the travel stop nut (52) CW and secure to bottom of attachment hub (4).

NOTE: Secure the actuator stem (6) by the

ﬂ ats when rotating the travel stop nut.

NOTE: "Stroke" length is indicated on the

nameplate (40), and is the distance between the "C" and "O" marks of the indicator plate (23).

NOTE: The proper calibration of the actua-

tor / valve unit will occur when at the lower pressure level of bench setting the valve plug (3) will just begin to travel from the "C" position. At the upper level of the bench setting, the actuator pressure should be within ±8% of the upper bench range for the desired stroke length.

11. Engage threaded, vented pipe plug (12) into the 1/8" NPT tap on the bon net (2). If a lubricating oil is compatible with the ﬂ uid, a light coat ing will aid in pre vent ing galling of the plug (12). En sure that the tip of the notch on the threads is in the bonnet (2) at least 1-1⁄2 revolutions.

Do not over-tighten to min i mize chanc es of

galling.

Do not use thread sealing com pound that

might “ﬁ ll in” the notch and negate the pur- pose of the notch.

12. Release all pressure from actuator.

(Stem movement will stop when the plug engages the seat.)

4. Slowly pressurize the ac tu a tor to a pres sure equal to the upper pres sure lev el of the bench setting; i.e. for a 5-15 psig (.34 -1.0 Barg) range, set pressure at 15 psig (1.0 Barg). Take note of the pressure reading when stem travel actually stops.

5. If the loading pressure, when stem movement stops, is below the upper end of the desired bench setting, then the com bined stem (9, 6) length is too long. a. Rotate jam nut (20) down to base of

threads on stem (9).

b. Decrease pressure in the actuator to

approximately mid range of the bench setting.

c. Rotate lower knuckle (44) CCW to

shorten the combined stem length. DO NOT allow actuator stem (6) to rotate in the actuator.

d. Release all pressure from the actuator

and repeat Step 4 previous.

6. If the loading pressure, when stem movement stops, is above the upper end of the desired bench setting, then the com bined stem (9, 6) length is too short. a. Rotate jam nut (20) down to base of

threads on stem (9).

b. Decrease pressure in the actuator to

approximately mid range of the bench setting.

c. Rotate lower knuckle (44) CW to in-

crease the combined stem length. DO NOT allow actuator stem (6) to rotate in the actuator.

d. Release all pressure from the actuator

and repeat Step 4 previous.

C. Procedure – Direct Action, ATC-FO:

1. Reference the nameplate (40) attached to the actuator yoke (3). Determine the bench set ting of the installed range springs (10) from the nameplate (40).

2. Connect a temporary air supply with an inline ad just able airset regulator and gauge to the upper actuator con nec tion. DO NOT LOAD with any air pressure at this point.

3. To determine when stem/plug (3) makes contact with the seat and travel stops, touch the stem below the jam nut with one ﬁ nger.

7. Increase pressure in the actuator to the upper pressure level of the bench setting.

8. Observe the location of the in di ca ting washer (51) to the "C" mark on the in di ca tor plate (23), mak ing sure to use the “top edge” of the in di ca ting washer (51) as the ref er ence point. Adjust indicator plate as needed.

8. Remove vented pipe plug (12) from the neck of the bonnet (2).

9. Slowly release air pressure in actuator until indicating washer (51) is in alignment with the “O” mark on the indicator plate (23).

IOM-52112

As pressure decreases, thru the hole in

the bonnet where the vented plug (12) was removed, watch for the anti-rotational "stop" (square or ﬂ at surface of the stem) to appear.

NOTE: This "stop" should not function as

an up travel stop and push up against the bonnet (2) (metal to metal). A gap of approximately 1/16" (1-1/2 mm) should exist between these two surfaces.

NOTE: The purpose of a correct calibration

of the stem stroke is to cause the up travel to be limited by the actuator travel stop nut.

10. To limit the up travel, rotate the travel stop nut (52) CW and secure to bottom of attachment hub (4).

NOTE: Secure the actuator stem (6) by the

ﬂ ats when rotating the travel stop nut.

NOTE: "Stroke" length is indicated on the

nameplate (40), and is the distance between the "C" and "O" marks of the indicator plate (23).

NOTE: The proper calibration of the actua-

tor / valve unit will occur when at the upper pressure level of bench setting, the valve plug (3) will be in the "C" position. At the lower level of the bench setting, the actuator pressure should be within ±8% of the lower bench range for the designed stroke length.

11. Reinstall vented pipe plug (12) using “Fluorolube” grease on threads.

12. Release all pressure from actuator.

NOTES

IOM-521

SECTION VII

VII. TROUBLE-SHOOTING GUIDE:

1. Valve is "jumpy" in stroking.

Possible Causes Remedies

A. Excess packing friction. A1. Re-align body--stem--actuator.

B. Installed backwards. B. Install per ﬂ ow arrow. Direction is only FTO.

2. Valve/actuator makes "screeching" noise.

Possible Causes Remedies

A. Excess pressure drop. A. Bring pressure drop within design limits.

3. Valve exhibits "excess" vibration.

Possible Causes Remedies

A. Excess pressure drop. A. Bring pressure drop within design limits.

B. Excessive cavitation in liquid service. B. Change operation parameters to relieve causes of cavitation.

C. High outlet velocity. C1. Reduce ﬂ ow rate and/or pressure drop.

A2. Packing follower too tight; back packing gland nut out. A3. Install positioner. A4. Increase bench set by changing to stiffer actuator range spring. May require positioner if not installed. May require different airset.

C2. Use multiple valves in series or parallel. C3. Increase outlet pipe size. C4. Use larger valve body with reduced trim.

4. Valve exhibits "excess" seat leakage.

Possible Causes Remedies

A. Excess pressure drop. A1. Reduce pressure drop conditions.

B. Excess body and/or plug wear. B1. Oversized valve operating too close to seat; go to reduced trim.

5. Bonnet gasket leakage.

Possible Causes Remedies

A. Improper bonnet bolting drawdown. A1. Remove bonnet taking necessary safety precautions. Inspect bellows to

B. Cantilevered actuator. B1. Do not allow use of the actuator as a "step" upon which personnel may climb.

6. Body ﬂ ange leakage.

Possible Causes Remedies

A. Over-tightening ﬂ ange bolting. A. Loosen bolting, replace/install new gasket, retighten ﬂ ange bolting in s

B. Improper pipe supports and anchors. B. Provide piping anchors and guides at control valve station.

C. Corroded ﬂ ange bolting. C. Replace with corrosion resistant ﬂ ange bolting.

D. Used outside pressure/temperature limits. D. Bring process variables within range of application; see Graph 1 in 521-TB.

A2. Convert to reduced trim. A3. Increase actuator thrust by changing actuator range spring.

B2. Remove abrasive particulate. B3. Possible excess cavitation in liquid service. Change operation parameters. B4. Replace body assembly if seat is badly worn. Replace plug if badly worn.

determine if primary seal at body/bellows is damaged. If bellows is damaged, replace bellows. A2. Inspect secondary seal bonnet gasket for uneven thickness. Replace bonnet gasket. A3. Draw down bonnet bolting evenly and in a cross pattern; use bonnet bolting torque levels indicated herein.

B2. Do not "set" any added weight on the actuator. B3. Install vertically.

cross-pattern evenly.

Restrain bending movements.

IOM-52114

7. Bellows failure.

Possible Causes Remedies

A. Overstroke of actuator. A. Recalibrate valve/actuator unit.

B. Abrasive particulate in ﬂ uid. B. Remove all ﬂ uid particulate.

C. Pressure, temperature, or pressure drop outside limits.

D. Fluid absorption. D1. Reduce pressure/temperature if possible.

E. Frequent stroking causing fatigue failure of TFE material.

F. Corrosion of embedded nut. F1. Consult factory.

8. Corrosion of stem sub-assembly at packing area.

Possible Causes Remedies

A. Loose packing. A. Disassemble valve and replace stem. Reassemble and tighten packing.

B. Fluid permeation of bellows.

C. Bellows failure. C. See No. 7 of this section.

C. Bring process variables within range of application; see Graph 1 in 521-TB..

D2. Reduce number of startups/shutdowns, or rapid depressurizations.

E1. Stabilize input SIG. E2. Stabilize positioner output LOAD. E3. Stabilize process variations to steady state, steady ﬂ ow. E4. Excess "play" in actuator swivel adapter; replace adapter. E5. Cycle life reached; replace bellows.

F2. Use alternate stem material.

B1. Bring process variables within range of application; see Graph 1 in 521-TB. B2. Use alternate stem materials construction. B3. Locate, or position valve to be out of ambient moisture. B4. Modify insulation if "trapping" moisture around packing gland nut. B5. Purge "void zone".

9. Corrosion of silver soldered joint in sub-assembly (1-1/2" or 2" sizes only).

Possible Causes Remedies

A. Fluid permeation with chemical attack of silver solder.

10. Corrosion surrounding vented pipe plug on bonnet.

Possible Causes Remedies

A. Fluid permeation and loose vented pipe plug. A1. Tighten plug.

B. Bellows Failure. B. Replace bellows.

11. External corrosion of jacket halves, bonnet, and body and bonnet bolting.

Possible Causes Remedies

A. Corrosive ambient environment. A1. Determine location of corrosive ﬂ uid and maintain cause of leakage.

12. Blisters on TFE internals.

Possible Causes Remedies

A. Effects of absorption. A1. Reduce pressure/temperature levels.

A1. Use alternate stem materials construction. A2. Purge "void zone".

A2. Replace corroded plug. A3. Purge "void zone".

A2. Coat exposed portions with suitable corrosive resistant epoxy to degree able,

A2. Reduce startups/shutdowns and rapid depressurizations. A3. Replace body assembly.

13. General corrosion of internals in "void zone", including Belleville washers ,embedded nut, bonnet, anti-rotation stop, and stem.

Possible Causes Remedies

A. Permeation together with ingress of moisture in "void zone".

A1. Remove moisture source to greatest degree possible. A2. Purge "void zone".

IOM-521

Figure 9: Primary & Secondary Body/Bonnet

IOM-52116

NOTE: No. varies

by body size

Figure 10: Control Valve Internals

ITEM NO. DESCRIPTION 1 Body Sub-Assembly

1.1 * Half Shell

1.2 * TFE Core

1.3 * Cap Screw

1.4 * Nut

1.5 * Lockwasher 2 Bonnet 3 Plug Head 4 Plug Retainer Strip 5 Packing Gland Nut 6 Packing Set

* Sub-level parts that make up the body sub-assembly; NOTE: DO NOT DISASSEMBLE THE PARTS OF THE

BODY SUB-ASSEMBLY (1)! The valve body (1) is ma chined after the shell halves (1.1) have been bolted (1.3,

1.4, 1.5) around the TFE core (1.2). Dis as sem bly of the body sub-assembly (1) will cre ate align ment problems upon com plet ed reassembly. The TFE core (1.2) is not replaceable, except as a body sub-as sem bly (1).

IOM-521

ITEM NO. DESCRIPTION 7 Belleville Spring Washer 8 Bellows Sub-Assembly 9 Stem Sub-Assembly 10 Spacer 11 Bonnet Gasket 12 Vented Pipe Plug 13 Lockwasher 14 Bonnet Cap Screw 15 Yoke nut Not Shown 18 Rating Tag 19 Bonnet Spacer 20 Jam Nut

SECTION VIII

VIII. ORDERING INFORMATION: NEW REPLACEMENT UNIT vs PARTS "KIT" FOR FIELD REPAIR

To obtain a quotation or place an order, please retrieve the Serial Number and Product Code that was stamped on the metal name plate and attached to the unit. This information can also be found on the Bill of Material ("BOM"), a parts list that was provided when unit was originally shipped. (Serial Number typically 6 digits). Product Code typical format as follows: (last digit is alpha character that reﬂ ects revision level for the product).

–

NEW REPLACEMENT UNIT:

Contact your local Cashco, Inc., Sales Rep re sen ta tive with the Serial Number and Product code. With this information they can provide a quotation for a new unit including a complete description, price and availability.

CAUTION

Do not attempt to alter the original construction of any unit without assistance and approval from the factory. All purposed changes will require a new name plate with appropriate ratings and new product code to accommodate the recommended part(s) changes.

PARTS "KIT" for FIELD REPAIR:

Contact your local Cashco, Inc., Sales Rep re sen ta tive with the Serial Number and Product code. Identify the parts and the quantity required to repair the unit from the "BOM" sheet that was provided when unit was originally shipped.

–

TO RETURN A VALVE FOR REPAIR: (RGA)

Before returning this Model - Contact Cashco Inc. for permission to return the unit (as a whole or any part of) and to obtain an "RGA" identiﬁ cation num- ber. This number must be marked clearly on the outside of the returned container. In addition, afﬁ x to the outside of the container a signed statement attesting to the fact that the valve and/or parts has been ﬂ ushed out for a speciﬁ c period of time using an "OSHA"acceptable neutralizing agent. The name of the agent, the manufacturer's company name and the total concentration level must be included for both the valve service medium, as well as the neutralizing agent.

NO returns wil be accepted at Cashco Inc. without an M.S.D.S. (Material Safety Data Sheet) afﬁ xed to the outside of the returned container.

NOTE: Those part numbers that have a quantity indicated

under "Spare Parts" in column "A” reﬂ ect minimum parts required for inspection and rebuild, - "Soft Goods Kit". Those in column “B” include minimum trim replacement parts needed plus those "Soft Goods" parts from column "A".

If the "BOM" is not available, refer to the crosssectional drawings included in this manual for part identiﬁ cation and selection.

A Local Sales Representative will provide quotation for appropriate Kit Number, Price and Availability.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or speciﬁ cations of such product at any time without notice. Cashco, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Cashco, Inc. product remains solely with the purchaser.

IOM-52118

Figure 11: Body Assembly (BA)

Note: End ﬂ ange

tapped bolt holes straddle horizontal and vertical centerlines.

ITEM NO. DESCRIPTION 1 Body Sub-Assembly 2 Bonnet 3 Plug Head 4 Plug Retainer Strip 5 Packing Gland Nut 6 Packing 7 Belleville Spring Washer 8 Bellows Sub-Assembly

IOM-521

ITEM NO. DESCRIPTION 9 Stem Sub-Assembly 10 Spacer 11 Bonnet Gasket 12 Vented Pipe Plug 13 Lockwasher 14 Bonnet Cap Screw 15 Yoke nut 18 Rating Tag 19 Bonnet Spacer 20 Jam Nut Not Shown 17 ANSI/DIN Adapter Gasket 43 Upper knuckle See Fig. 6 44 Lower knuckle See Fig. 6 51 Indicating Washer See Fig. 6

Cashco, Inc. P.O. Box 6 Ellsworth, KS 67439-0006 PH (785) 472-4461 Fax. # (785) 472-3539 www.cashco.com email: sales@cashco.com

Printed in U.S.A. 521-IOM

Cashco GmbH Handwerkerstrasse 15 15366 Hoppegarten, Germany PH +49 3342 4243135 Fax. No. +49 3342 4243136 www.cashco.com Email: germany@cashco.com

Cashco do Brasil, Ltda. Al.Venus, 340 Indaiatuba - Sao Paulo, Brazil PH +55 11 99677 7177 Fax. No. www.cashco.com Email: brazil@cashco.com

Cashco 521 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual