TITLE:
NO.:
KEROTEST MODEL-1
REV.: E
GATE VALVE BONNET LEAK
DATE: 7/12/07
REPAIR PROCEDURE
PAGE: 6 OF 13
This report is the property of Kerotest Manufacturing Corp. 5500 Second Avenue, Pittsburgh, PA 15207 and may not be
copied by any means without the expressed written consent of Kerotest. It is intended for the sole purpose of helping
Kerotest customers evaluate Kerotest products and may not be released to any third party or otherwise used in any
manner injurious to the interests of Kerotest
.
E. After cover is raised the gasket and mating sealing surfaces can be cleaned and
polished. Re-coat the gasket and sealing surfaces with Slic-Tite TFE Paste. Reverse
the procedure above and install new bonnet bolts and tighten them in the proper
sequence and to the specified torque listed in Enclosure 2.
5. If after performing the procedure in Item 4 bonnet leakage continues at an unacceptable
rate, then repeat Steps 4A through 4D. After the cover is raised, cut and remove the
existing metal bonnet gasket and replace it with a section of teflon rope as shown in the
diagram below. Tighten bonnet bolts in proper sequence and to specified torque listed in
Enclosure 2. This procedure must only be performed by Kerotest Factory Trained
Personnel.
