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SD73

PARTS LIST

SIEMENS MODEL SERIES 73N BUILT-IN VALVE POSITIONER

Drawing No. 10636PL
3/91 Supersedes 8/88

IMPORTANT

Service Parts Kits are available for servicing the instrument. Contact Siemens for available kits; refer to the Product
Support section of this instruction. Some parts in this Parts List may not be available for separate purchase.

Содержание 73N

Страница 1: ...and larger ports in the fast response positioner greater filling and exhausting capacities result This permits a quicker response to a change in control conditions plus increased speed of valve operation Tapped Exhaust The Model 73N Positioner can be ordered with a tapped exhaust port This feature permits piping of the pilot exhaust to a safe atmosphere on applications where noxious gases are used...

Страница 2: ...tions are 1 4 NPT 2 The piping recommended for the positioner is 1 4 O D tubing for the INSTRUMENT input connection and 3 8 O D tubing for the supply connection However any scale free piping may be used 3 Blow out all piping before connections are made to prevent dirt chips etc from entering the positioner 4 Use pipe sealant sparingly and then only on the male threads A non hardening sealant is st...

Страница 3: ...in failure of the positioner The following materials are in contact with supply air Aluminum Brass Stainless Steel Neoprene and Buna N The requirements for a quality air supply can be found in the Instrument Society of America s Quality Standard for Instrument Air ISA S7 3 Basically this standard calls for the following Particle Size Maximum particle size in the air stream should be no larger than...

Страница 4: ...e cases valve shut off or opening may be required at a specific instrument pressure To zero the positioner at this point set the instrument pressure at the specific pressure and turn the zero adjustment screw until the valve reaches the required position A slight change of the instrument pressure should start to move the valve The valve stroke for a given span may also be suppressed or shifted to ...

Страница 5: ...12 3612 4024 2 1 2 6412 4812 4012 4824 4024 2 3 4 6412 4812 4412 4824 4824 3 6412 4812 4824 3 1 2 5612 4 6412 Special Notes 1 All range springs are identified as Part No P N 12395 ______ from table 2 Input pressure span pressure max input minus pressure min input e g 3 15 psig range 12 psig span Spring Selection 1 Find valve stroke nearest desired valve stroke 2 Find instrument input pressure span...

Страница 6: ...plunger 5 Use a non abrasive solvent to clean the plunger 6 Replace the plunger 7 Replace and tighten the retaining nut 8 Replace the top cover DISASSEMBLY Refer to parts list 1 Loosen the six socket head mounting screws holding the positioner to the actuator 2 Remove the positioner 3 Remove the two body screws holding the diaphragm stack assembly to the positioner body located on the underside of...

Страница 7: ...SD73 Figure 4 Schematic Direct Acting Figure 5 Schematic Reverse Acting 7 ...

Страница 8: ...et site see the table has current revisions of technical literature in Portable Document Format for downloading To send an instrument to Siemens for warranty or non warranty service call Repair Service and request a Return Material Authorization RMA IMPORTANT An instrument must be thoroughly cleaned decontaminated to remove any process materials hazardous materials or blood borne pathogens prior t...

Страница 9: ...s c SELLER HEREBY DISCLAIMS ALL OTHER WARRANTIES EXPRESS OR IMPLIED EXCEPT THAT OF TITLE SPECIFICALLY IT DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE COURSE OF DEALING AND USAGE OF TRADE d Buyer and successors of Buyer are limited to the remedies specified in this article and shall have no others for a nonconformity in the goods Buyer agrees that these remed...

Страница 10: ...ng No 10636PL 3 91 Supersedes 8 88 IMPORTANT Service Parts Kits are available for servicing the instrument Contact Siemens for available kits refer to the Product Support section of this instruction Some parts in this Parts List may not be available for separate purchase 10 ...

Страница 11: ...awing No 10976PL 3 91 Supersedes 5 86 IMPORTANT Service Parts Kits are available for servicing the instrument Contact Siemens for available kits refer to the Product Support section of this instruction Some parts in this Parts List may not be available for separate purchase 11 ...

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Siemens 73N, Инструкция по установке и обслуживанию

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