TITLE:
NO.:
KEROTEST MODEL-1
REV.: 10
GATE VALVE
DATE: 7/12/07
OPERATIONS MANUAL
PAGE: 28 OF 35
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.
Bonnet Gasket Leak
See Attachment 2, Model-1 Bonnet Leak Repair Procedure.
Broken Stems
This can be due to one of two possibilities: External damage (i.e. backhoe, etc.) or if the valve
when in the full open or full closed position is over torqued. See "Critical Torque Table" (Page
32).
The valve stem is designed to shear at minimum cross-sectional area at the top of stem. This
should enable you to utilize a pipe wrench on the remainder of stem protruding above the
gland. The "Secondary Repacking Procedure" may now be used to replace the broken stem.
In all cases, your area representative or factory personnel should be notified to make this
repair. Kerotest is prepared at all times to give this service at relatively short notice.
Ordering Procedure
Reorder or replacement parts procurement.
Proper identification of replacement parts or valves will improve deliveries and eliminate order-
processing errors.
When ordering replacement parts, first identify the part from the illustration in the introduction.
Locate the valve size, figure number of WOG rating from the valve body, and serial number or
date code off the identification tag (see sample below) attached to the body cover flange.
A typical replacement part order should read as follows:
3 Pieces – Stem for 8" 1F2WL (or 285 MOP) valve
Serial Number 5 07
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