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IOM-DA8

16

 

Item No. 

Description

 

 

7  

Diaphragm Cap Screw 

 13 

Piston/Guide 

Bearing

        14  ‡‡ 

Stem Seals

 

  14.1 

Upper Stem Seal

 

  14.2 

Middle Stem Seal

 

  14.3 

Lower Stem Seal

        15  ‡‡ 

Cage Seal

 19 

Cage

 20 

Valve 

Plug

        21  ‡‡ 

Lower Cage Gasket

 

24 

Lower Guide Bushing

        28  ‡‡ 

Seat Disk

 

29 

Seat Disk Washer

 

30 

Seat Disk Nut

‡‡  Recommended Repair Parts

Figure 4:  

Body Sizes

2-1/2" – 4", Composition Diaphragm

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 con-

strued 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 specifications 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.

Summary of Contents for DA8

Page 1: ...lowed to enter the regulator upon startup 7 FlowDirection Installsotheflowdirectionmatches the arrow cast on the body or other markings such as in and out 8 PrecautionforStandardDiaphragmConstruction...

Page 2: ...m piping to prevent water pockets whichallowsthediaphragmchamber to always be self draining The external sens ing line may be sloped upward for liquids or gases i e non condensable fluids Recommended...

Page 3: ...o not walk away and leave a bypassed regulator unattended 5 Slowly open the inlet upstream block valve to about 25 open observing the inlet upstream pressure gauge Determine if the regulator is flowin...

Page 4: ...or repairing regulators 4 Owner should refer to owner s procedures for removal handling cleaning and disposal of nonreusable parts i e gaskets etc NOTE On regulators originally supplied as SpecialClea...

Page 5: ...Figure 1 Dynamic Side Seals Type CP TFE Cap Dynamic Seal Type PR PRA Dynamic Seal Type UC U Cup Dynamic Seal Type NO No Dynamic Seal NOTE Two separate piston rings per assembly Standard Flow Only 1 1...

Page 6: ...removed metal parts C Disassembly of the ITA 1 Body Sizes 1 2 2 See Figures 2 through 4 a Obtain two pieces of square section barstock with a 3 8 7 16 dimension approximately 2 inches long b Place pl...

Page 7: ...rts should be free of surface contaminants burrs oxides and scale Rework and clean the parts as necessary Surface conditions thataffecttheregulatorperformancearestated below replace parts that can not...

Page 8: ...seal 27 1 edgetouchestheupperlipofthecage 19 While gently applying force to press the piston guide bushing 13 or valve plug 20 into the cage 19 simultaneously use fingers to lightly press the cap sea...

Page 9: ...agm construction place compatible gasket sealant on both sides and place new lower pusher plate gasket 14 4 on over upper end of valve plug 20 and onto lower diaphragm pusher plate 10 Gasket sealant i...

Page 10: ...ck off range spring assembly a fraction of the turntoalignthemilledslotsperpendicular to the center line of the valve body The slots should now be ready to accept the internal ribs of the spring chamb...

Page 11: ...kage a Determine test pressure If upper value of range spring is less than 55 psig use test pressure of 5 psig less than upper value of range spring If upper value of range spring is greater than 55 p...

Page 12: ...t regulator outlet as close as possible to outlet port etc Following are some of the more common complaints along with possible causes and remedies SECTION VIII Possible Causes Remedies A Sticking of...

Page 13: ...contains trim replacement parts plus seal s diaphragm s and gasket s Step 3 Contact your local KM Sales Representative and specify the product code number along with a description of any parts not in...

Page 14: ...IOM DA8 14 Figure 2 Composition Diaphragm FTO Reverse Flow Direction...

Page 15: ...Cage Seal 18 Cage Cap Screws Item No Description 19 Cage 20 Valve Plug 21 Lower Cage Gasket 23 Body 24 Lower Guide Bushing 26 Tap Plug Not Shown 27 Dynamic Side Seal 27 1 TFE Cap Seal 27 2 O ring Ener...

Page 16: ...are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be con strued as warranties or guarantees express or implied regarding the p...

Page 17: ...The details of the assessment in terms of the individual Essential Health and Safety Requirements are listed in Table 1 Table 2 lists all of the models and options that were evaluated and along with...

Page 18: ...e same requirements for the piping system Also see item 30 in Table 1 2 The system designer and users must take precautions to prevent rapid system pressurization which may raise surface temperatures...

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