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IOM-6987

7

Figure 2: 

  Basic Model 6987 - Metal Seat 

Range Springs from 50 psig to 200 psig.

 

ITEM 

 

 

REPAIR PARTS

 

NO. DESCRIPTION 

 Kit 

B

 1  Body
 2  Spring 

chamber

 3  Adjusting 

Screw

 

Spring Buttons (2)

 

Adjusting Screw Lock Nut

 6  Range 

Spring

 7  Diaphragm 

Ring 

  (upper 

range 

spring 

s only. See Figure 3)

 8  Pressure 

Plate

 9  Ball 

Bearing

 10  Diaphragms 

---------------------------

‡‡

 11  Diaphragm 

Gasket 

------------------

‡‡

 13  Flange 

Bolts

 17  Renewal 

Unit

 17.1 

 

Piston 

------------------------------

‡‡

 17.2 

 

Cylinder 

----------------------------

‡‡

 

17.3    Piston Spring Button -----------

‡‡

 19  Piston 

o-ring 

--------------------------

‡‡

 20  Piston 

Spring 

-------------------------

‡‡

 

24 Pipe 

Plug

7

8

9

4

17.3

10

19

Figure 3: 

  Basic Model 6987 - Metal Seat 

Range Springs from 200 psig to 800 psig.

 

 

ITEMS NOT SHOWN

 16  Name 

Plate

‡‡

‡‡

‡‡

Содержание 6987

Страница 1: ...s continuous such that shutdown is not readily accomplished it is recommended that an inlet block valve outlet block valve and a manual bypass valve be installed 3 Pipe unions should be installed to allow removal from piping 4 An inlet pressure gauge should be located approximately ten pipe diameters upstream and within sight An outlet pressure gauge is optional 5 All installations should include ...

Страница 2: ...ge spring at maximum flow the inlet pressure should not exceed 1 5 x 100 psig 6 9 Barg or 150 psig 10 3 Barg If it does consult factory 12 Increase flow to maximum level if possible Inlet upstream or P1 pressure should fall off Readjust setpoint as necessary at the normal flow rate 1 Start with the block valves closed A bypass valve may be used to maintain inlet pressure in the upstream system wit...

Страница 3: ...ket 11 7 Inspectpressureplate 8 fordeformationdue to over pressurization If deformed replace 8 Clean all parts to be reused according to owner s procedures NOTE On regulators originally supplied as special cleaned Option 55 maintenance must include a level of cleanliness equal to Cashco s cleaning standard S 1134 On regulators originally supplied as special cleaned Option 56 maintenance must inclu...

Страница 4: ...ve the renewal unit 17 2 Remove the piston spring button 17 3 piston 17 1 with piston o ring 19 and the piston spring 20 3 Remove the cylinder 17 2 by turning CCW 4 Inspect seating surfaces of the piston 17 1 and cylinder 17 2 If necessary relap the seating surface or replace renewal unit 17 5 Clean all parts to be reused according to owner s procedures NOTE On regulators originally supplied as sp...

Страница 5: ...range spring screwing out CCW of adjustingscrewdoesnotallowbringingpressurelevel to a stable and proper level C Replace range spring with proper lower range Contact factory D Too much proportional band rise D1 D2 Review P B rise expected Contact factory E Restricted diaphragm movement E Ensure no moisture in spring chamber at temperatures below freezing Ensure no dust or debris entering vent openi...

Страница 6: ...mn 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 available refer to the cross sectional drawings included in this manual for part identification and selection ALocalSalesRepresentativewillprovidequotation for appropriate Kit Number Price and Availa...

Страница 7: ...ew Lock Nut 6 Range Spring 7 Diaphragm Ring upper range springs only See Figure 3 8 Pressure Plate 9 Ball Bearing 10 Diaphragms 11 Diaphragm Gasket 13 Flange Bolts 17 Renewal Unit 17 1 Piston 17 2 Cylinder 17 3 Piston Spring Button 19 Piston o ring 20 Piston Spring 24 Pipe Plug 7 8 9 4 17 3 10 19 Figure 3 Basic Model 6987 Metal Seat Range Springs from 200 psig to 800 psig ITEMS NOT SHOWN 16 Name P...

Страница 8: ...dual 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 their evaluation Models and options not listed in Table 2 should be assumed to not have been evaluated and therefore should not be selected for use in a potentially explosive environment until they have been evaluated Standard default options for each l...

Страница 9: ...llow the 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 of system components and tubing due to adiabatic compression of the system gas 3 Heating systems installed by the user could possibly increase the surface temperature and must be evaluated by t...

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