United States Nuclear Regulatory Commission - Protecting People and the Environment

FLOWSERVE Flow Control Division

August 23, 2001

U.S. Nuclear Regulatory Commission
Attn: Linda Joy Smith
611 Ryan Plaza Drive
Arlington,TX 76011

Subject: Borg-Warner 3" and 4" Swing Check Valves

Dear Linda:

As we discussed over the last few weeks, Arizona Public Service advised Flowserve that a 4"-1500# Swing Check Valve didn't perform properly for the same reason that was earlier reported as a 10CFR21on a 4"-150# Swing Check Valve. A copy of the original report is attached.

Also attached is a copy of the letters sent to all customers who received either 3" or 4" Swing Check Valves of any pressure class during the time when the problem may have occurred. These are submitted per your request.

Please advise if there are any additional questions.

Flow Control Division

G.W. Knieser
Technical Manager

cc: USNRC, Document Control Desk, Washington, DC


Flowserve FCD Corporation
A Unit of Flowserve Corporation
Flow Control Division
Williamsport Operations
P.O. Box 3428 701 First Street
Williamsport, PA 17701-0428
Phone 570 327 4800
Facsimile 570 327 4805

Attachment PDF Icon

Page Last Reviewed/Updated Thursday, March 29, 2012