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Y690VB Series 

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business of Emerson Process Management.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or 

guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such 

products at any time without notice.

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Process Management product remains solely with the purchaser.

©Emerson Process Management Regulator Technologies, Inc., 1999, 2009; 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: +39 051 4190611
Middle East and Africa

Dubai, United Arab Emirates

Tel: +971 4811 8100

Natural Gas Technologies

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

Singapore, Singapore 128461

Tel: +65 6777 8211
Europe

Bologna, Italy 40013

Tel: +39 051 4190611

Gallardon, France 28320

Tel: +33 (0)2 37 33 47 00

TESCOM

Emerson Process Management

Tescom Corporation

USA - Headquarters

Elk River, Minnesota 55330-2445 USA

Tel: 1-763-241-3238
Europe

Selmsdorf, Germany 23923

Tel: +49 (0) 38823 31 0

For further information visit www.fisherregulators.com

Figure 4.  Type Y690VBM Assembly

B2675

Summary of Contents for Y690VB

Page 1: ...on gives some general ratings and specifications for the Y690VB Series vacuum breakers Individual breakers come from the factory with the specific data stamped on the nameplate Installation Warning Personal injury property damage equipment damage or leakage due to escaping gas or bursting of pressure containing parts may result if this equipment is overpressured or is installed where service condi...

Page 2: ...B Internal Type Y690VBM External Temperature Capabilities 2 Nitrile NBR 20 to 180 F 29 to 82 C Fluorocarbon FKM 40 to 300 F 4 to 149 C Ethylenepropylene EPDM 20 to 275 F 29 to 135 C Perfluoroelastomer FFKM 20 to 300 F 29 to 149 C Approximate Weight 19 pounds 9 kg Figure 2 Type Y690VB Operational Schematic VACUUM PUMP VACUUM BEING LIMITED POSITIVE PRESSURE OR ATMOSPHERE OR A LESSER VACUUM THAN THE ...

Page 3: ...st be protected against condensation or clogging Principle of Operation The Y690VB Series vacuum breakers Figure 2 are used in applications where an increase in vacuum must be limited An increase in vacuum decrease in absolute pressure is transmitted to the lower side of the diaphragm opening the disk assembly This permits positive pressure atmosphere or an upstream vacuum that has higher absolute...

Page 4: ... the body key 1 and secure with the cap screws key 2 Diaphragm and Spring Case Area These procedures are for gaining access to the control spring diaphragm assembly valve stem and stem O ring All pressure must be released from the diaphragm case before these steps can be performed Type Y690VB Key numbers are referenced in Figure 3 1 Remove the closing cap key 22 and turn the adjusting nut key 20 c...

Page 5: ...dure steps 1 through 4 and pull the valve stem out of the guide insert key 18 6 Lightly grease the replacement stem seal O ring key 30 and install on the valve stem key 14 Install the valve stem by pushing it into the guide insert key 18 and perform body area maintenance procedure steps 5 through 7 7 Install the lever assembly key 16 into the valve stem key 14 and secure the lever assembly key 16 ...

Page 6: ...g Seat 1A201824092 20 Adjusting Nut 17B9740X012 21 Hex Nut 1A345724122 22 Closing Cap Standard 1B541644012 Steel 1E422724092 23 Hex Nut not shown 8 required Ductile iron 1A352724122 Stainless steel 1E9440X0302 24 Diaphragm Case Cap Screw 8 required Ductile iron 1A352524052 Stainless steel 18B3455X012 25 Closing Cap Gasket 1P753306992 26 Vent Assembly Spring Case Up standard 17A6570X012 Spring Case...

Page 7: ...Y690VB Series 7 B2674_2 Figure 3 Type Y690VB Assembly B2674_1 ...

Page 8: ...product remains solely with the purchaser Emerson Process Management Regulator Technologies Inc 1999 2009 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 39 051 4190611 Midd...

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