Car seal open / close.

CSO Valves are normally used in PSV lines and they are supposed to remain open even in case

of its stem failure. So it is preferable to orient them in horizontal.

More on CSO Valves :

Regards,

Jitendra Surve

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From: piping_valves@yahoogroups.com [mailto:piping_valves@yahoogroups.com] On Behalf Of Paranjape, Deepak V
Sent: Friday, July 25, 2008 9:17 AM
To: piping_valves@yahoogroups.com
Cc: kannan.sundaram@linde-le.com
Subject: RE: [piping_valves] How do bellow valves work ?

Hi all,

During a recent client design review, the client (Exxon Mobil) asked us to orient the stem of all valves with CSO (Car Seal Open) in horizontal position. Can anyone share the reason for this. Is it a thumb rule or it just client specific choice.

Deepak