Excerpts from the SSM Industries fax notification:
On May 10, 2019, SSM Industries, Inc. discovered, during electronic research of literature for Hytork actuators, that an Important Product Safety Notice (safety notice) was issued by Emerson Valve Automation/Hytork concerning Hytork models XL 1126 and XL 1371 pneumatic rack and pinion actuators, manufactured after 2005 and before June 2015. Emerson stated that a model XL 1371 actuator developed a crack in the side wall just underneath the dual stroke adjustment (DSA) pad.
SSM immediately reviewed all projects supplied with Hytork actuators. SSM Industries, Inc. supplied a total of three (3) Hytork model XL 1126 actuators as part of the specialty ventilation dampers manufactured for the nuclear industry. These damper actuators were dedicated by SSM Industries, Inc. at that time and were provided as Safety Related. One (1) of the damper actuators was supplied to Dominion Millstone Nuclear Plant and two (2) were supplied to Dominion North Anna Nuclear Plant. Both utilities have been notified. SSM Industries, Inc. was informed by both utilities that all three actuators were visually inspected and no cracks were discovered. On May 22, 2019 SSM Industries, Inc. made the determination that the defect was reportable under 10 CFR 21.
SSM Industries, lnc. will send Hytork Brace Mechanisms to the aforementioned customers in accordance with the Emerson safety actions. This ensures the safety and integrity of the existing actuators.
SSM Industries, Inc. has ordered Hytork XL 1127 replacement actuators for immediate replacement of installed XL 1126 Hytork actuators. Expected delivery of these actuators is anticipated to be less than 4 weeks.
For additional information please contact the following SSM Industries, Inc. personnel.
Matt Gorman, SSM Power Division Manager: (412)777-5100 Ext 320 (Office); mgorman@ssmi.biz (e-mail),
Lou Reda, SSM
QA Manager; (412)777-5100 Ext 382 (Office); lreda@ssmi.biz (e-mail)