Overhauling of Valves and Filters at various locations on DCI DREDGE XVII

Amount

Overhauling of Main sea suction over board, intermediate valves in various locations. Detailed scope is attached here with along with annexure. Contractor should be in a position to mobilise and start the work within 2 days. Contractor having valid experience in execution of similar works will only be considered. The contractor shall have to engage men on round the clock basis and also on sundays and holidays.

Overhauling of various valves on turnkey basis as per Annexure attached. A) Overhau of se suction & overboard valves (i) sea suction/delivery valves in pump room

700 NB Butterfly Valves - Fwd m/c room stbd sea chest v/v after filter leaking.

600 NB Butterfly Valves to be overhauled along with Hydraulic actuator.Spares required for overhauling to be arranged by vendor

500 NB Butterfly Valves o be overhauled along with Hydraulic actuator.Spares required for overhauling to be arranged by vendor

400 NB Butterfly Valves o be overhauled along with Hydraulic actuator.Spares required for overhauling to be arranged by vendor

(ii) Butterfly Valves in Engine Room, Fwd Machinery & Pump Room

200 NB- MSW P/P #2, #3 Discharge v/v leaking.

(iii) Globe Valves in Engine Room

& Pump Room:

(iv) Draft Load Monitor (DLM) Transducer connection shut off valves,both Fwd. & Aft. to be overhauled

(v) Overboard Discharge Valves:

(i) Engine Room Globe Valves:

(ii) Pump Room Globe Valves:

(iii) Valves in Pump Room:

80 NB Screw down NRV

50 NB Screw down NRV

32 NB Screw down NRV

20 NB Screw down NRV

125 NB Angle Valve

b) INTERMEDIATE VALVES TO BE OVERHAULED:

Following Valves in Engine Room and Pump Room need to be overhauled / renewed:

i) Butterfly Valves in Bow Thruster, Port & Stbd.Dredge Pump Engine Cooling Water Pump, Gland Flushing Pump Suction, Port, Stbd. & Centre, Main & D/P Engine Air Cooler, Seawater Inlet/Outlet, Main Engine Seawater Discharge: 1)LT V/Vs to the Generator inlet and outlet not holding.2) LT and HT Exp. Tank valves leaking. 3) Harbour duty s/w p/p suction valve from aft peak tank not holding.4) Harbour duty cooler FW valves not holding.5) LT Cooler valves (Pand S) not opening and closing properly. STP system all gate valves to be pr.tested and if required repaired.; fore peak ballast pipe line valves to overhaul.

ii) Straight Screw Down Valves in Engine Room:

iii) Angle Screw Down Valves in Engine Room:

iv) Screw Down Non return Valves in Pump Room:

v) Straight Screw Down Valves in Pump Room:

vi) Angle Screw Down Nonreturn Valve in Pump Room:

Jet Pump discharge line No.2 and 11 ( Ø 300 ) hydraulic actuated valve in central keelson with actuator to overhaul – 2 Nos. Spares for overhauling of actuators and valves are tobe arranged by vendor .

Valve and jet discharge valve (dumping valve in fore peak tank) to be overhauled along with actuator size 350mm butterfly .

Butterfly valve ( Ø 700 mm ) between STBD Main sea chest filter and decantination tank to be renewed in FWD MC Space. Valve ship supply.

Removal of main sea suction filter and Jet pump sea suction filter by opening the filter casing to be cleaned/scraped thoroughly.Post cleaning to be fitted in position with new rubber joints.

Removal of sea water PP filter by opening the filter casing to be cleaned thoroughly.Post cleaning to be fitted in position with new rubber joints.

GHR Marine Training & Certification Services Pvt. Ltd.

GOKUL ENGINEERING ASSOCIATES

SRI SAI KRISHNA WORKS

KALYANI ENGINEERING ENTERPRISES

KRYSTAL ENGINEERING TECHNOLOGIES