Liquid fuel and Gas fuel stop valve Hydraulic relay problem and stuck up problem. We have a 09 nos. of GE FRAME –VI, MARK-V controlled GAS TURBINE . 06 nos. supplied by BHEL-INDIA and 03 nos, from NUOVO PIGNONE . Last 02 years we are facing problem like Liquid fuel stop valve (VS-1) and Gas fuel control valve Hydraulic relay problem.
(*) When we stop the machine or trippeing of machine and after resolving problem we go for machine start up, during this time while AHOP(auxiliary hydraulic oil pump) start Liquid fuel stop valve (VS-1) open its oven without firing permissive through. By oepning the Hydraulic relay to solve this problem servicing done and we found most of time thin layer of sludge or bad surface. So after servicing relay we use it working ok. This happened 10-15 times in Nuovo pignone machine.
(*) After 10-15 hrs. or few days stopping of Gas fuel supply we operate GCV it found stuck up condition . Or its Hydraulic relay not working. Sometimes after servicing of relay works ok and some time we have to done mechanical rousing of the valve for smooth operation
What are the probable reasons for Liquid stop valve and GCV hydraulic relay problem or stuck-up problem? Is it because of lube oil? pl. suggests to resolve this problem.
Fuel Stop Valves and Hydraulic Relay Problem
Re: Fuel Stop Valves and Hydraulic Relay Problem
