HP/LP BYPASS SYSTEM FUNCTION: TO ENSURE OPERATION OF STEAM GENERATOR BY MAINTAINING A MINIMUM CIRCULATION OF STEAM FLOW , WHEN TURBINE IS NOT IN SERVICE ADVANTAGES: * QUICK START UP OF THE UNIT * REHEATER PROTECTION DURING START - UP * PARALLEL OPERATION OF STEAM GENERATOR & TURBINE * HOUSE LOAD OPERATION * LIMITED SAFETY VALVE LIFTING DURING TRIP OUTS * DM WATER SAVING
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HP/LP BYPASS SYSTEMFUNCTION:
TO ENSURE OPERATION OF STEAM GENERATOR BY MAINTAINING A MINIMUM CIRCULATION OF STEAM FLOW , WHEN TURBINE IS NOT IN SERVICE
ADVANTAGES:
* QUICK START UP OF THE UNIT* REHEATER PROTECTION DURING START - UP * PARALLEL OPERATION OF STEAM GENERATOR & TURBINE* HOUSE LOAD OPERATION* LIMITED SAFETY VALVE LIFTING DURING TRIP OUTS* DM WATER SAVING
LIST OF EQUIPMENTS:
1. HP BYPASS VALVE: ARS100+ASM200-10/SK240
2. HP BYPASS SPRAY VALVE: E32S+ASM100-10/SK 200
3. HP BYPASS ISOLATION VALVE: E32S+ASM100-10/SK 200
4. BREAK DOWN ORIFICE
5. OIL SUPPLY UNIT: 0V32B-30-201
6. SERVO VALVE: ST10-4+R6z
7. SERVO VALVE: ST10-63+R6z
8. ON-OFF CONTROL UNIT: APL 6
9. BLOCKING ELEMENT BL10
10. QUICK OPENING DEVICE SSB10
11. SS OIL LINES AND HYDRAULIC SYSTEM COMPONENTS
HP BYPASS VALE 1. DESIGN PRESSURE 166.2 KG/CM
2. DESIGN TEMPERTURE 545 C
3. MAX. FLOW 204 T/HR AT 150 KG/Sqcm& 537, C.
4. VALVE TYPE COMBINED PERSSURE REDUCING
AND DESUPERHEATING VALVES
5. BODY MATERIAL SA 182 F22 (2 1/4%Cr. 1% Mo STEEL)