Refurbished Products - Marine Industry

United Van Der Horst has successfully combined specialized welding technology and Hard Chrome plating techniques for the complete reconditioning of damaged or worn Piston Crowns. All ring grooves are built to standard size, top and bottom faces of grooves are chrome plated to reduce wear. Thee entire procedure are approved by classification societies like IRS, DNV, BV, Lloyds. Testing of final products is witnessed band certified by the respective classification society.

All burnt areas in the combustion bowl and internal cracks are successfully rebuilt by machining out worn-out / damaged areas prior to weld build up. DP checks are carried out intermittently all through the process of reconditioning. The latest modification are implemented as per manufacture's recommendation. Third party inspection and certification is carried out by agencies like IRS, BV, DNV, Lloyds, etc.

All worn-out / damaged base material is removed till sound metal by machining. The valve is then welded by compatible electrodes and inlaid with satellite and machined to original dimensions and profiles. Stem is built up to standard dimensions by Hard Chrome plating, if required.

These are reconditioned by removal of worn-out / damaged portions are pre-machined to sound metal. NDT checks are performed prior to weld built up. Inlay of satellite on valve seat area and finish machining followed by lapping and blue matching with respective valve spindle is done to ensure minimum 70% contact area.

Specialized Welding Techniques and consumables are employed to re-generate all areas which are eroded, worn out (especially around valve guide bush) and any other locations. Cooling water chambers are cleaned and tested at 7 bar pressure.

All burnt areas in the combustion bowl and internal cracks are successfully rebuilt by machining out worn-out / damaged areas prior to weld build up. DP checks are carried out intermittently all through the process of reconditioning. The latest modification are implemented as per manufacture's recommendation. Third party inspection and certification is carried out by agencies like IRS, BV, DNV, Llyods etc.

Overhauling, re-conditioning, replacement of parts including mechanical seal, impeller etc. Erection and testing of all types of pumps such as fire pumps, main sea water pumps, auxiliary sea water pumps etc. Modified or OEM Seals with latest technology and with different sealing profiles are available.

Connnecting rods of all types of auxilliary engines are re-conditioned by lapping the mating faces (serrations) to over 95% contact surface and re-machining the bore to maintain circularity of crank-pin bearing bore within 10 micron.

United Van Der Horst has the capacity to reconditioned Liners by the well known patented "Porous Krome" plating process to bring back to the liners to its original dimensions. This patented process regulates porosity which is similar to newly manufactured cast iron liners with added advantage of wear resistance surface (60 HRC). These pore forms are the anchoring points for oil retention in the liner which helps in maintaining a fluid film.

Re-conditioning of crank shaft up to 10 meters long with a swing over a diameter of 1.2 meters. Repairing of crankpins and main Journals by juxtaposing the grinding process. Services for crank-shaft also includes straightening of crankshaft by peening method, full dimensional inspection in addition with magnaflux crack detection. The entire procedure are approved by classification societies like IRS, DNV, BV, Lloyds. Inspection of final product is witnessed and certified by the respective classification society.

Cylinders are manufactured / reconditioned, inspected and tested in accordance with "ISO 10100:2001 : Hydraulic fluid power Cylinders-Acceptance tests". Please refer to our hydraulic cylinder catalog for details complete solution including custom made new cylinders and reconditioning of worn out or damaged cylinders like hatch covers, grabs, crane booms, reach stacker cylinders, dry dock gates cylinders, lift, boom, tilt, steering, outrigger jack cylinders etc. Modified seals with latest technology and with modified sealing profiles are available.

Special fittings tools can also be supplied to prevent damage to the seals while installation and for ease of fitment. The cylinders are coated with special anti-corrosive epoxy paints or suitable surface treatments is carried out based on environment of service.

Friedrich Schmaltz-German Make cylindrical grinding machine, with CNC controlled cylindrical grinding facility is used to grind bearing diameters of propeller shaft with length in excess to 12 meters can easily be ground.

Weld build up broken / damaged propeller blade with compatible electrode with proper welding procedure, grinding and matching of profile. Inspection by certification societies like IRS, BV, DNV, GL etc.

Rudder stock is a part of Rudder system of Ships for directional control. Repair scope includes rectification of damaged / pitted surface of rudder stock as per approved WPS (welding procedure specification) from DNV / Approved certifying authority for the respective ship. High stress concentrated areas shall be taken in to consideration during welding.

Eroded / Worn Casings (thin walled) or even cracked ones of the turbo chargers casing can be effectively repaired by the "Cold / Fusion" method. All turbo charger casings are hydro-tested in house and classified by the certifying authority.

Piston rods of all types of main engine are first ground to remove deep scores and DP tested. The rods are then hard chrome plate to standard size and certified by class as required.

Re-generation of splines (after having completely machined the splines to the root dia.), gears, shaft, etc and testing of the complete unit.

Reconditioning of lift cylinders, steering cylinders, boom cylinders and load testing of equipment including power pack. Seals with latest technology and with modified sealing profiles are available.

Re-conditioning of gears and shafts by the hard chrome plating technique, replacement or overhauling with other internal parts including testing of equipment.

Repair of manifolds, hydraulic cylinders - both tube and rod by hard chrome plating and honing, end caps, providing cathodic protection for the lock / sluice gates. Modified or OEM seals with latest technology and sealing profiles are available.

Reconditioning of hydraulic cylinders, swivel gear, boom etc by qualified welding procedures, testing etc. Modified or OEM seals with latest technology and sealing profiles are available.

In-situ machining of bores, face and grooves of flanges, hatches, man holes etc. can be carried out with our special equipment and skilled staff at the customers end wherever required.