tender for procurement of different size of knife edge gate valves installed at various locations of ahp-iv stps, sarni. , different size of knife edge gate valves installed at various locations of ahp-iv stps, sarni. , 150 nb kgv with hand wheel , 200 nb kgv with pneumatic cylinder, solenoid v/v & limit switch , 250 nb kgv with pneumatic cylinder, solenoid v/v & limit switch , 300 nb kgv with pneumatic cylinder, solenoid v/v & limit switch , 150 nb kgv with pneumatic cylinder, solenoid v/v & limit switch , 40 diaphragm with pneumatic cylinder, solenoid v/v & limit switch , 15 diaphragm with pneumatic cylinder, solenoid v/v & limit switch