END ENTRY/SIDE ENTRY

[vaibhavdhumal]

Hi,

I want to know, end entry is different from side entry ball valves?

Does both are separate designs or just a term difference.
If any difference then where end entry are used? My client has specified end entry at single specification rest all are side entry.

May be a silly question but need to know.


Thanks in advance.

regards,
VD

 

[LittleInch]

The definition is about how the valve is constructed. Side entry is normally a valve where the body is split at 90 degrees to the bore with normally a bolted flange (2 piece) or flanges ((3 piece) which contains the whole ball valve assembly.

End entry tends to mean a single valve body and the ball is kept in place by a piece which is screwed in from the end.

See

http://www.valvias.com/type-ball-valve.php

and scroll down to valve bodies. they call side entry "split body" which is the same thing.

End entry is normally limited to the smaller sizes - 2" and below

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[zdas04]

I'm not sure that you got that right LI.

"Side entry" is usually referred to as "top entry". With a top entry valve, you can remove the top of the valve to get access to the ball and seats so you don't have to remove the valve from the line to repair it (but you do have to blow the line down).

"End entry" (in LittleInch's link this is either "end entry" or "split body") is a set of bolts (or threads) that allow a removed valve to be separated to access the ball and seats.

David Simpson, PE
MuleShoe Engineering

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. —Galileo Galilei, Italian Physicist

 

[gerhardl]

You all got me interested in the topic, as I (too) thought that I had in my mind a clear definition. By a brief googlesearch I had to revise my opinion. The truth is that you both ar right: the definition vary, differ and are mixed for different sources and manufacturors, sizes and countries.

Some sources gives end entry, split body and side entry the same definition: (valve to be demounted from line for either demounting ball-holding ring from the end or split the body to replace ball and ball sealings)
(I do not agree with including the last type!)

No wonder everyone can be confused!

I do however agree with zdas04, and to directly answer vaibhavhumal: since your source describes as two different types the end entry and the side entry I believe end entry in this case to be normal valves to be demounted for service. The side-entry in this case 'top-entry' types, to be able to be serviced in-line.

To be sure: ask customer for details and of typical examples of valves that will qualify, or propose valves for ok or not.

And: absolutely no silly question, the world makes simple questions complicated to answer!

 

[ashok4344]

Hi friend
What LittleInch told is absolutely correct answer.

 

[LittleInch]

Ashok - That's what I thought! Thanks.

Top entry to me is quite clear - it's the "top" of the valve and you can remove it while the rest of the shell is still bolted in.

"Side entry" is often a bolted (2 or 3 part) actually inline with the bore, though I have seen odd valves with a side flange at 90 degrees to the bore.

End is the internal screw type arrangement from the "end" of the valve.

I had to go look but that's how most vendors call it.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[MikeHalloran]

You need to get clarification from the client, not us.

I can't quite eliminate the possibility that the specification was written by a high schooler who is talking about right angle valves vs. straight valves.



Mike Halloran
Pembroke Pines, FL, USA

 

[vaibhavdhumal]

Thanks all of you.

As per your suggestion it will be better to get clarify from the client


Regards,
VD