cashco DA0 Installation, Operation & Maintenance Manual Download Page 7

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IOM-DA0

2. Inboard Leakage Test.

a. Release all loading pressure in cover

dome.

b. Pressurize inlet to 30 psig (2.1 Barg) with

air, GN

c. Tube outlet to a beaker of water to ob serve

number of escaping gas bubbles.

Inboard leakage path may be via plug/seat or
dynamic side seal.

3. Pressure Containment Test.

a. Pressurize inlet to 200 psig (13.8 Barg)

and outlet and cover dome to 150 psig
(10.3 Barg) with air or GN

b. Spray liquid lead detector and check all

ex ter nal leak points; i.e. plugged con nec-
tions, and flange bolting.

4. Excessive leakage will require disassembly,

examination of sealing elements, correction
of problem, reassembly and retesting.

Summary of Contents for DA0

Page 1: ...pical pipelinedebrisfromenteringvalveanddamaging internal soft goods primarily the dynamic seal 4 Steam traps should be installed before and after the regulator to provide proper drainage 5 Install th...

Page 2: ...not over pressurizing 6 Continue to slowly open the inlet upstream block valve until fully open 7 Continue to slowly open the outlet downstream block valve especially when the downstream pip ing syste...

Page 3: ...nance while in line VII MAINTENANCE A General Item No Part Description 7 Nut 10 Stop Plate 13 Guide Bearing Piston 14 Lower and Upper Static Stem Seal 15 Cage O ring Seal 16 Wiper 17 Wiper Washer 19 C...

Page 4: ...sembly of the ITA 1 To disassemble the ITA hold the lower part of the plug 20 in a bench vise Do not hold on the machined surface in the plug s 20 spindle area NOTE The spindle slides in Figure 2 Asse...

Page 5: ...r seal 16 is best left in this position overnight minimum of two 2 hours prior to final reassembly 2 After re forming the wiper seal remove parts 13 16 17 from cage 19 and disassemble this temporary a...

Page 6: ...eplate 99 located under one bolt head 9 Tighten the body bolting 11 12 evenly in an alternating cross pattern in one revolution increments to the following torque values G Pressure Testing 1 If a hydr...

Page 7: ...e path may be via plug seat or dynamic side seal 3 Pressure Containment Test a Pressurize inlet to 200 psig 13 8 Barg and outlet and cover dome to 150 psig 10 3 Barg with air or GN2 b Spray liquid lea...

Page 8: ...07 4 10 28 6 9 6 41 4 28 SIZE ORIENTATION S O Factor Body Size in DN Orientation Cover Dome on Top Cover Dome on Bottom 1 2 1 15 25 1 1 1 1 4 1 1 2 32 40 2 2 2 50 2 5 2 5 2 1 2 3 65 80 3 3 4 100 4 4...

Page 9: ...nd if necessary replace B Oversized regulator B Check actual flow conditions resize regulator for minimum and maxi mum flow if necessary replace with smaller size regulator 2 Downstream pressure will...

Page 10: ...A reflectminimum 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 av...

Page 11: ...uide Bearing 14 Seal 15 Cage Seal 16 Wiper Seal 17 Washer 18 Cage Cap Screws 19 Cage Item No Description 20 Plug 21 Seat 22 Spring 23 Body 24 Body Bushing 25 Cover Dome 27 Dynamic Seal see Figure 1 37...

Page 12: ...ooling of the process gas depends on the process gas and the inlet and outlet pressures The system designer is responsible for determining whether the process gas temperature may raise under any opera...

Page 13: ...DA6 DA8 DA0 DA1 DAP SAP SLR 1 SLR 2 PTR 1 ALR 1 ULR 1 PGR 1 BQ BQ OPT 45 BQ CRYO 123 123 CRYO 123 OPT 45 123 OPT 46G 123 1 6 123 1 6 OPT 45 123 1 6 OPT 46G 123 1 6 S 123 1 6 S OPT 40 1000HP 1000HP OPT...