Hello All,
Looking for H-25 experts in this forum who can guide me regarding an observation we've picked on one of our gas turbines. We have two H-25 GTs installed at our site with Mark-VI Control System. GCV-SRV are of Shimadzu make while their hydraulic cylinder is of Yuken. We have been operating these turbines for over 10 years now without any problems in GCV-SRV operation. Hence, we haven't carried out any maintenance of these valves since commissioning. Recently, we carried out online monitoring of the GCV, SRV installed on both GTs and checked the oil leakages from actuator ports. GT-1 GCV SRV were found to be okay but it seems that GT-2 GCV actuator seals have given away and need replacement. I am attaching the video we captured during our monitoring. Although GT-2 GCV is also working fine till now, I want the expert opinion of you guys to gauge the seriousness of this observation and whether we should be considering an overhauling.
The problem with the overhauling part is that Hitachi recommends purchasing a complete spare set of GCV-SRV, installing it on our GT-2 and sending the existing set to their factory for overhauling. This, of course, has a significant lead time and capital cost associated with it which our organization had not prepared for. Therefore, I'll really appreciate any sort of help from you guys in identifying any expert resources regarding H-25 machines who can provide us prompt support and spare parts on urgent basis. Thanks in advance.
Link to videos:
https://engro2-my.sharepoint.com/:f...xIktVXihogn4MBYLjHSza3992ND1cVgtsckg?e=ukKabi
Looking for H-25 experts in this forum who can guide me regarding an observation we've picked on one of our gas turbines. We have two H-25 GTs installed at our site with Mark-VI Control System. GCV-SRV are of Shimadzu make while their hydraulic cylinder is of Yuken. We have been operating these turbines for over 10 years now without any problems in GCV-SRV operation. Hence, we haven't carried out any maintenance of these valves since commissioning. Recently, we carried out online monitoring of the GCV, SRV installed on both GTs and checked the oil leakages from actuator ports. GT-1 GCV SRV were found to be okay but it seems that GT-2 GCV actuator seals have given away and need replacement. I am attaching the video we captured during our monitoring. Although GT-2 GCV is also working fine till now, I want the expert opinion of you guys to gauge the seriousness of this observation and whether we should be considering an overhauling.
The problem with the overhauling part is that Hitachi recommends purchasing a complete spare set of GCV-SRV, installing it on our GT-2 and sending the existing set to their factory for overhauling. This, of course, has a significant lead time and capital cost associated with it which our organization had not prepared for. Therefore, I'll really appreciate any sort of help from you guys in identifying any expert resources regarding H-25 machines who can provide us prompt support and spare parts on urgent basis. Thanks in advance.
Link to videos:
https://engro2-my.sharepoint.com/:f...xIktVXihogn4MBYLjHSza3992ND1cVgtsckg?e=ukKabi