The Orbit valve is a rather special "rising stem non-contacting" ball valve.
In my opinion one of the best ball valves being produced in this World.
It is born with only one seat, a fixed seat, and usually that seat should be upstream the flow.
Especially in services with sand and other solids in the fluid, the seat must be upstream.
Also if it used for opening where there is a large differential pressure, the valve works best with the seat upstream, because at the beginning of the opening phase, the ball is pressed away from the fixed seat rather than pressed into it.
I believe there are some services, where the seat should be downstream. Pls. consult the Orbit Installation, Operation and Maintenance manual, that can be found on the Internet.
Yours sincerely
Kristian Lund Jepsen
M. Sc. Mech. Eng.
Senior Chief Consultant
Piping & Mechanical
D +45 - 51617324
M +45 - 23402936
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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of hwjoshi@tce.co.in
Sent: 13. maj 2015 14:44
To: tdky167@gmail.com
Cc: materials-welding@googlegroups.com
Subject: Re: [MW:23277] PPE in orbit vlaves
It matters at least for globe valve for following the flow direction as marked on it..
your truly
H W JOSHI
ENGINEER MECHANICAL
TATA CONSULTING ENGINEERS LTD
MUMBAI - 400 083
TEL : 022 61148414
| TDK YOKESH <tdky167@gmail.com> 12-05-2015 16:07
|
|
Hello sagar ,
So the valve has to be installed with respect to PPE not by flow direction ie. If the flow as per iso is east to west and when the valve is installed with respect to PPE the flow for valve is west to east and it doesn't matters ?? Is there a document or standard which gives detail explanation about PPE ???
On Mon, May 11, 2015 at 3:23 PM, sagar patil <sagar.tecnimont@gmail.com> wrote:
Orbit valves are single seated valves; this arrangement make the valves unidirectional.
Manufacturers of these valves mostly mark PPE on flange rims instead of flow directions.
On Thu, May 7, 2015 at 5:02 AM, TDK YOKESH <tdky167@gmail.com> wrote:
Warm Greetings folks ,
Being a welding/ material forum , I dont know whether I should be posting this .
What is PPE ( preffered Pressure End ) ??? How does it affect the flow ??? What if the flow direction and PPE are different as per ISO?? how should the valve be installed . I mean with respect to PPE or flow direction ??? Please clarify .
--
Best regards,
TDK YOKESH
QC INSPECTOR ( PIPING AND WELDING )
QUALITY CONTROL DEPARTMENT
Plot D1, Lumut Port Industrial Park,
Kg. Acheh, Mukim of Lumut,
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Best regards,
TDK YOKESH
QC INSPECTOR ( PIPING AND WELDING )
QUALITY CONTROL DEPARTMENT
Plot D1, Lumut Port Industrial Park,
Kg. Acheh, Mukim of Lumut,
Daerah Manjung, 32000 Sitiawan,
Perak Darul Ridzuan,
Malaysia
Tel No. : +601126527600
Email: tdky167@gmail.com
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