TITLE:
NO.:
KEROTEST MODEL-1
REV.: 10
GATE VALVE
DATE: 7/12/07
OPERATIONS MANUAL
PAGE: 8 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.
• End flange bolts should not be fastened in consecutive order. Each one tightened
should be 180° opposite the previous one (see sketch below). Two passes should be
made. Once pass for half tightness and final pass for full tightness.
Butt Weld End Valves
• Valve ends are machined per ANSI B16.25
• "Note" in order that the valve seats are not affected during the welding operation, the
wedge should be in the closed position
• Valves should be installed using either the electric arc or oxy-acetylene welding
methods by welders and welding procedures qualified under Section IX of the ASME
Boiler and Pressure Vessel Code or an equivalent requirement
• Valve bodies are carbon steel (ASTM A216, Gr. WCB). Type 7018 Welding Rod is
suggested for welding these valves in the pipeline.
Butt Weld End X Flange End Valves
• Refer to butt weld end valves and flanged end valve for installation
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