This factory-assembled repair cartridge combines all valve replacement parts, plus the bonnet into a repair solution.
Before the introduction of this solution, any suspected globe valve issues, such as leaking or sticking, typically required disassembly of the valve to identify the required replacement part(s). Once identified, the parts had to be ordered, and then installed after receipt. In the best case, these activities could be performed in the field by an experienced technician, albeit with some difficulty due to the required precision of installation tasks and the multiplicity of parts. In the worst case, a valve would need to be removed from service, resulting in added repair cost and labour and additional downtime.
The Trim Cartridge addresses these issues related to wear parts and also helps mitigate fugitive emissions with standardised Enviro-seal packing. For older valves without this type of packing in place, the Trim Cartridge is claimed to provide a cost-effective upgrade to reduce emissions.
With this new solution, inline valve repair is typically feasible once process media and pressure have been removed from the valve, and it can be performed by a technician, without the need for extensive training or expensive equipment. Safety is improved by reducing technician time in the field because a typical repair process requiring the assembly of up to 20 parts has been simplified into a single, ready-to-install control valve repair solution.
The pre-assembled Trim Cartridge is ordered as a single part number with the standard OEM Fisher valve warranty and is serialised to help improve the traceability and documentation of repair parts. The Trim Cartridge is available for currently installed and new Fisher ET and EZ globe valves in sizes from NPS 1 to NPS 4.