OT31

Amount

Inspection & Overhauling of HP/LP Bypass ‘B’ Isolation control valve: a. Dismantling & assembling of the Complete actuator assembly (HP/LP Bypass Isolation control valve): Charges for Moving the Piston into the bottom end position, Releasing of oil pressure from oil system, Disconnecting all connector and Hydraulic hoses from actuator, Removal of coupling locker & feedback linkage on coupling, Decoupling the piston rod from valve stem, Loosening and removing screw connection Actuator Yoke – Valve and lifting of the actuator from the valve by using the special fixture, Removing the complete Actuator unit from the HPLP Bypass isolation control valve by using the special fixture including the cost of consumables & T&P’S.

b. Dismantling the HP/LP Bypass ‘B’ Isolation control valve: Charges for loosening and removing of HSB Cap screw, Removing of bearing carrier, nozzle body etc., Removing of Bonnet Nozzle body, seat ring etc., by using gas heating machine as per requirement, Removing of valve stem and cleaning of all parts by solvent & Inspection of stem, valve body, bonnet, cage, plug assembly and other parts Dye penetration test for any defect including the cost of consumables and T&P’s.

c. Overhauling and reassembling of HP/LP Bypass ‘B’ Isolation control valve: Charges for Repairing/replacement of the wornout/damaged parts of LP Bypass Isolation control valve and Re-Assembling of all the parts in the correct sequence with new soft goods such as stem packing, gaskets and balance including the cost of consumables and T&P’s.

Inspection & Overhauling of actuators of HP/LP Bypass ‘B’ Injection spray control valve: Charges for Repairing/ replacement of the wornout/damaged parts of HP/LP Bypass Injection Spray control valve and Re-Assembling of all the parts in the correct sequence with new seal kit, O Rings, gaskets and damaged hoses in Injection, Isolation valve etc in the actuator including the cost of consumables and T&P’s.

Overhauling, Replacing of Hydraulic Accumulators a) Disassembling of hydraulic accumulators from HPU by using special tools & tackles and shifting to repair bay including the cost of consumables and T&P’s.

b) Dismantling of hydraulic accumulators completely and checking the condition of the Shell, Bladder, Fluid port body, Anti-extrusion ring and other parts etc by using special tools & tackles and including the cost of consumables and T&P’s.

c) Assembling of hydraulic accumulators with new/old bladder by using special tools & tackles and including the cost of consumables and T&P’s.

d) Placing of hydraulic accumulator to HPU tank, fixing of all pressurized lines on the fluid side, Assembling of PRV fluid side and filling and checking of nitrogen gas into accumulator and commissioning by using special tools & tackles and including the cost of consumables and T&P’s.

N2 pressure checking/filling in the EH Oil, HP/LP Bypass control oil & TDBFP A&B lube oil Accumulators: Charges for shifting of N2 cylinder, connecting all the hoses from N2 cylinder to accumulator, N2 pressure checking/filling of N2 gas into accumulators by using special tools & tackles and including the cost of consumables and T&P’s.

Natesan Engineering Contractor