Cost Benefits of Critical Valve Repair in the Heat Recovery Steam Generator

摘要

This study revealed that the cost to repair this type of critical thermal valve is significantly lower than the cost to replace it after every cycle. The fact that Pentair's Yarway Welbond repairable valves can be repaired inline is an additional benefit. Repairing is also a more sustainable solution, as is reduces the total process cycle. More detail is provided in the following points: 1. The first maintenance cycle of the Yarway Welbond repairable, 1.5", F-22 material, 1700# pressure class valve provides the opportunity to refurbish internal valve components vs. replacing the valve at a direct cost reduction of $1,745 per maintenance cycle. The total lifecycle cost associated with the valve is primarily determined by the number of maintenance refurbishment events the internal valve components (Stellite seat) provide. Manufacturer documentation suggests a minimum of three valve seat refurbishments are achievable prior to replacing the valve body or other significant valve components under routine service application. Based on manufacturer repair data for routine valve service in steam application, the following economy of savings could be realized by the user.