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Emerson 168 Series, Instruction Manual

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Emerson 168 Series Instruction Manual Download Page 6

168, 168H, and 68 Series

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

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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