Emerson 168 Series Instruction Manual Download Page 5

168, 168H, and 68 Series

5

parts ordering

When corresponding with the local Sales Office about 

this equipment, state the type number and all other 

pertinent data found on the nameplates (key 14,  

Figure 3; key 10, Figure 4).  When ordering 

replacement parts, also specify the complete  

11 character part number of each part required.

parts list

168 and 168H Series (figure 3)

key  Description 

part number

  1 

Diaphragm Case, Aluminum 

 2U876208012

  2 

Spring Case Assembly

 

  (consists of keys 2A and 2B)                                  1U8763000A2

  2A  Spring Case, Aluminum                              

       4U876408012

  2B  Spring Case Bushing, Steel and  

 

  Polytetrafluoroethylene (PTFE) 

  1U876599402

  3 

Diaphragm Piston, Aluminum 

 

  168 Series 

 1U876608012

 

  168H Series 

 1U880009022

  4*  Diaphragm, Dacron

®(1)

/Nitrile (NBR)

 

  168 Series 

  2U876702472 

 

  168H Series 

  1U879902472

  5 

Machine Screw, Plate steel 

 

  168 Series                                                       

1U876832982

 

  168H Series 

  1U880132982

  6 

Stem, SST 

  1U876935162

  7 

Range Adjusting Nut, SST (2 required)            

  1U877046172

  8 

Spring, Plate steel 

See Table 1

  9 

Hex Nut, Zinc plate steel (2 required) 

   1A680324122

  10  Stem Protector Plastic      

                                 2U877206992

  11  Machine Screw, Plate steel (4 required) 

  1A331928982

  12  Machine Screw, Plate steel

 

  168 Series (8 required) 

  1H340328992

 

  168H Series (16 required) 

  1H340328992

  13  Hex Nut (168 Series only), Zinc plate 

 

  steel (8 required) 

  1A345724122

  14  Nameplate, Aluminum     

   1U8773X00A2 

  15  Mounting Bracket, Steel 

3P426825022

  16  Cap Screw, Plate steel (2 required) 

1A381624052

  17  Vent Screen, Monel

®(2)

 

0W086343062

  18  Body Assembly 

See 68 Series parts list

  19  Spacer (168H Series only), Aluminum 

 1U879809022

  20  Reset Lever, Aluminum 

13A7467X012

  21  Knob, 303 (303 SST)                           

      1U879335032

  22  Pin 

  13A7468X012

  23  Machine Screw, Steel (2 required) 

  13A7834X012

  24  Indicator Tag, SST 

  13A7835X012

  25  Tubing, Copper (not shown) (specify length) 

   0500201701W

  26  Connector, Brass (not shown) 

  15A6002X202

  27  Elbow, Brass (not shown) 

  15A6002X162

key  Description 

part number

68 Series (figure 4)

key  Description 

part number

  1 

Body, Aluminum 

3U877608012

  2 

Spring Case Assembly 

 

  (consists of keys 2A through 2F)

 

    Type 68-3 

1U8547000A2

 

    Type 68-1 or 68-2 

1U8777000A2

  2A  Spring Case, Aluminum 

3U877808012

  2B*  O-ring, Nitrile (NBR) 

1E220206992

  2C  Trip Lever, SST 

1U877946172

  2D  Spring, SST 

See Table 1

  2E  Trip Lever Pin, SST 

 1U878149062

  2F  Spacer, Nylon 

  1V175006162

  3*  Rocker Assembly, Glass-filled nylon with

 

  polyurethane valve disks 

  1U878206992

  4 

Seat Ring, SST (2 required) 

  1U878435032

  5 

Roller Assembly, Aluminum and SST 

   1U8786000A2

  6*  O-ring, Nitrile (NBR) 

  1U879006562

  7 

Rocker Pin, SST 

 1U879149062

  8 

Machine Screw, Plate steel (4 required) 

 10B6186X012

  9 

Machine Screw, Plate steel (4 required) 

1A327928982

 *Recommended spare part.

 1.  Trademark is a mark owned by E.I. du Pont de Nemours and Co.

 2.  Trademark is a mark owned by Special Metals Corporation.

Summary of Contents for 168 Series

Page 1: ... reaches the lower tripping pressure the spring moves the stem and lower range adjusting nut to return the rocker to its original position closing port B and opening port C The 68 Series Figure 4 three way snap acting body assemblies can be used alone or to form the valve body portions of 168 or 168H Series switching valves With the addition of the lever knob key 11 Figure 4 to a Type 68 1 body as...

Page 2: ... 41 to 6 90 3 45 to 10 3 2 41 to 6 90 1U877127142 green 1U879727142 yellow 1U877127142 green 1U879724142 yellow 150 150 40 40 10 3 10 3 2 76 2 76 1U878037022 Metallic 1U878037022 Metallic 1U854537022 Yellow 1U854537022 Yellow 68 1 68 1 68 3 68 3 Installation Maximum allowable pressures for the diaphragm and body are given in the Specifications section above and Table 1 respectively If pressure to ...

Page 3: ...er to its alternate position 4 Tighten each locknut against its respective adjusting nut 5 Replace stem protector and machine screws key 11 168 and 168H Series Manual Reset Operation Without Manual Reset Switch With one adjusting nut removed the unit will switch with high or low diaphragm pressure and will remain in that position until the stem protector key 10 Figure 3 is removed and the trip lev...

Page 4: ...embly key 2 4 Carefully drive out trip lever pin key 2E 5 Remove trip lever key 2C and attached spring key 2D from spring case 6 Install new O ring key 2B in spring case 7 Re install trip lever and attached spring into spring case 8 Carefully drive trip lever pin key 2E into the mating holes in the spring case and trip lever 9 Replace O ring key 6 in valve body Coat the replacement O ring with a g...

Page 5: ...ed 1A345724122 14 Nameplate Aluminum 1U8773X00A2 15 Mounting Bracket Steel 3P426825022 16 Cap Screw Plate steel 2 required 1A381624052 17 Vent Screen Monel 2 0W086343062 18 Body Assembly See 68 Series parts list 19 Spacer 168H Series only Aluminum 1U879809022 20 Reset Lever Aluminum 13A7467X012 21 Knob 303 303 SST 1U879335032 22 Pin 13A7468X012 23 Machine Screw Steel 2 required 13A7834X012 24 Indi...

Page 6: ...6 Reset lever trip lever section D d 43A8117 B B1199 1 detail of manual reset switch for use with either 168 or 168h series DU8774 D 168 Series DU8796 D 168H Series Figure 3 Switching Valve Constructions A b c A b c A b c d d ...

Page 7: ...168 168H and 68 Series 7 TRIP LEVER DETAIL OF TYPE 68 2 BODY FOR MANUAL OPERATION A B C CU8794 F COMPLETE TYPE 68 1 OR 68 3 BODY Figure 4 68 Series Switching Valve Body Assemblies ...

Page 8: ...rocess Management product remains solely with the purchaser Emerson Process Management Regulator Technologies Inc 1974 2008 All Rights Reserved Industrial Regulators Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75069 1872 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Shanghai China 201206 Tel 86 21 2892 9000 Europe Bologna Italy 40013 Tel 3...

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