Re: Fw: [STM] Condensate Return

From: <PONNU>
Date: Sat May 01 2004 - 01:59:00 EDT

You can refer to Armstrong steam trap and pump literature. If the traps do not have built-in check valves , external check valves are required on discharge lines.

Explanation for system behaviour in spring can also be derived from a reading of this literature with respect to the system details. You can call them-in to help out too.

Regards

C Ponnu

Paul Bowers <pbowers@pipingdesign.com> wrote: Any ideas from the water hammer specialists for this guy?

Paul

• Original Message ----- From: <JCrow72359@aol.com> To: <steam-list@lists.cc.utexas.edu> Sent: Friday, April 30, 2004 6:11 PM Subject: [STM] Condensate Return

> Recently visited a plant to investigate water hammer in a closed
condensate
> return system.
> Three condensate return lines input to a receiver for a steam powered
pump
> return system. The condensate is then pumped to the boiler room DA.
>
> Some observed conditions at the receiver/pump system:
> The traps and pipe insulation on the three return lines are typical of
the
> limited maintenance in most plants.
> One of the return lines may have blow through steam.
> The float and valve system may need repair.
>
> While a proper analysis requires a complete check of the entire
system, the
> plant personnel feel that focus should be on the receiver area. The
claim is
> that the water hammer increases in the spring, and is only a slight
problem in
> the winter.
>
> My specific question for this inquiry regards the swing check valve
located
> in each of the three return lines. I am trying to understand the
purpose of
> these check valves, especially since I do not feel that either line
can cause
> overflow to another.
> I am wondering about the pressure barrier and the thermal barrier
created by
> the check valve.
>
> Do not feel that the pressure barrier is significant, but the thermal
barrier
> may have some significance.
>
> Jim C
> Portland Or

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[Non-text portions of this message have been removed] Received on Sat May 01 01:59:00 2004