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Why does vacuum in steam condenser reduce or drop??

  1-High exhaust temperature: Vacuum drops or maintains at lower side due to high exhaust steam temperature flow into steam condenser. This high exhaust temperature is mainly due to 1-Operation of Turbine at lower loads 2-More clearance in labyrinth seals 3-Not operating exhaust hood sprays 4-More load on condenser 5-Breaking of ejector U loop 2-Low circulating cooling water flow Vacuum in condenser reduces due to inadequate cooling water flow through steam condenser. This is mainly due to; 1-Problems associated with pumps 2-Air pockets in pipe line 3-Leakages in cooling water line 4-Stuck of discharge valve of pump 3-High cooling water temperature at condenser inlet Higher cooling water temperature at condenser inlet results into reduction of vacuum due to poor heat transfer from steam to water 4-Poor heat transfer in condenser Very less or poor heat transfer in steam condenser reduces vacuum to very low level resulting into high exhaust temperature &am

Clear steps for Boiler Safety valves major overhauling

 Boiler Safety valve major overhauling steps Cleaning of safety valve Complete dismantling of safety valve. Cleaning, polishing & buffing of parts. Thorough inspection of all parts. Seat & disc lapping Spindle run out (bend) checking Spring checking for any abnormalities like crack, bend, reduced tension etc Lapping of both disc & seat. Inspection of upper & lower ring teeth for damage/crac Measurement & re-assembly. Inspection of discharge pipe connection. If there is telescopic discharge pipe, then ensure a gap of minimum 10 mm for thermal expansion. ASSEMBLY STEPS. 1-After seat & disc lapping, place lower nozzle ring on seat & level both the faces Questions & Answers on Safety valves 2-After leveling, turn the lower ring by 3 notches in clockwise direction. For example if Safety valve’s operating pressure is 117 kg/cm2, then 117 kg/cm2/42.4 kg/cm2 = 2.75 Appx. 3 Nos i.e 42.4 kg/cm2 for every notch (For more details, refer

Turbine oil and transformer oil standard testing parameters

  TURBINE OIL STANDARD PARAMETERS OIL: Servo prime 46T Testing frequency: Every 6 months Sl No. Oil Property UOM Test Method Acceptable limits 1 Appearance NA Visual Clear/yellow Viscous liquid 2 Colour Hazen ASTM D1500 < 2 3 Density Kg/m3 IS 1448-P-16:1990 820-870 4 Flash Point 0 C ATM D 93 > 180 5 Kinematic Viscosity at 40 0 C Cst ATM D 445-17a 43-48 6 Kinematic Viscosity at 100 0 C Cst ATM D 445-17a >6.7 7 Viscosity index NA ASTM D 2270 > 98 8 PRPVOT (Revolving Presure Vessel Oxidation  Stabilty Test)

On line water & steam leakage arrester and sealants

  Lucifer Waterproof Rubberized Adhesive Sealant Tape Stop Leaks Seal Sealant Repair Tape 2-Buyyart Polyimide Heat Resistant/High Temperature Adhesive Tape (10mm)                                                 3-RUDRA Waterproof Adhesive Sealant Tape Stop Leaks Seal Repair Tape                                                 ` 4-Online Transformer Oil Leak Sealant                                                           5-THEMISTO - built with passion RT1 Royal Tools Silicon Sealant Gun                                          6-J-B Weld 8281 Professional Size Steel Reinforced Epoxy                                                       7-Blue Magic 16002TRI QuikSteel Steel Reinforced Epoxy Putty Repair                                               
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