View non-flash version
ry ohnson DURAMAX V/ MARINE PRODUCTS BACKED WITH TOTAL SERVICES-QUALITY ASSURANCE - EXPERIt EASE OF AVAILABILITY — PROVEN PERFORMANCE PROPULSION UPDATE Sulzer Introduces A Longer-Stroke Medium-Speed Engine Circle 45 on Reader Service Card WATER LUBRICATED BEARINGS and Flanged Types plus All-Rubber Demountable Stave Type — Full Range of Sizes. STUFFING BOXES RUBBER FENDERING Full range of Types and Sizes. Inflatable Air Seal Ring type seals around shaft during packing change without dry docking. Tow Knees in three standard thicknesses - Various profiles of Fendering for vessel and docks. 90-10 Cupro-Nickel Spiral Tube Coolers for maximum heat transfer - 4 to 24 tubes - single and double bank models. Send for latest Catalogs. Dependable Johnson-Duramax Marine Products are Sold and Serviced Worldwide. DURAMAX MARINE/ division ot The Johnson Rubber Company / A Subsidiary of Duramax Inc. / Dependable Products For Ships Throughout The World ® t.m. Reg 6 2022 485 See us at the WorkBoat Show—Booth 364. Middlefield, OH 44062 Area Code: 216/632-1611 Telex: 21-2564JRCM UR / Cable: "DURAMAX" SAAB Tank Control Relocates To New, Larger Facilities James Rolfe, president of Saab Tank Control (formerly salwico) re- cently announced the company's relocation to new and larger quar- ters. Saab is now located at One Harmon Plaza, Secaucus, N.J. 07094. The new telephone number is (201) 348-3000. "The move was necessary," Mr. Rolfe stated, "in order to supple- ment our expanding business and accommodate our personnel growth. All sales, marketing and technical information will be at the new loca- tion." Circle 14 on Reader Service Card CIRCLE 305 ON RSC CIRCLE 306 ON RSC CIRCLE 307 ON RSC CIRCLE 308 ON RSC 42 Maritime Reporter/Engineering News to 900 hp, and lowering the engine speed from 580 rpm to 510 rpm. The longer stroke and consequen- tial slower rotation speed of the ZA40S have the advantages of: —Better combustion as the time available for combustion is in- creased; —Better mechanical efficiency due to lower friction losses in the engine bearings; —And improved combustion chamber geometry. All of which contribute to the im- provement in specific fuel consump- tion without increasing the maxi- mum firing pressure above 155 bar as in the ZA40. Sulzer achieved the characteris- tics of the ZA40S engine with a min- imum number of design changes to the ZA40 engine components. The longer stroke is accomplished within the same frame dimensions as the shorter-stroke ZA40 by compensat- ing for the increased crank throw with a shorter connecting rod. Three notable design features contained in the ZA40S which have demon- strated their importance for reliabil- ity and long component life on poor- quality heavy fuel oils operation are: —Rotating piston—at maximum cylinder pressures above 150 bar, rotating pistons are an as- set in guarding against scuffing and maintaining low wear rates while ensuring low lubricating oil consumption, generally less than 1.0 g/bhp h. —Bore cooling—applied to all combustion space components (cylinder head, cylinder liner and piston crown) results in low stress levels, high rigidity and optimum metal temperatures, all prerequisites for satisfactory heavy-fuel performance. —Exhaust valve technology—ex- haust valve design incorporat- ing water-cooled seat inserts, Nimonic valves and valve rota- tors, contributes to extended time between overhauls. The ZA40S engine is available in an in-line configuration with six, Eastern Marine Developing One Of Three Facilities As Offshore Supply Base Eastern Marine, Inc., the Panama City, Fla., shipbuilding firm, has an- nounced plans to develop one of its three facilities as an offshore supply base. This move was stimulated on account of the increasing offshore exploration activities in the Gulf of Mexico off Florida's Northwest Panhandle Region. Eastern Ma- rine's proposed facility consists of a 10.5-acre prime, centrally located tract, which is a peninsula bordered by water averaging 14 feet in depth. eight or nine cylinders, and in a "V" configuration with 12, 14, 16 or 18 cylinders and ranging in power from 5,400 to 16,200 bhp at 510 rpm. At an economy rating of 750 bhp at 510 rpm, the "V" engines achieve a spe- cific fuel consumption of 129 g/bhp h. By using an exhaust gas power turbine as an "efficiency booster," the specific fuel rate can be improved by 3 percent to 125 g/ bhp h. For further information and com- plete literature on the ZA40S engine from Sulzer Brothers, Circle 12 on Reader Service Card This strategic location is just min- utes away from the Intracoastal Waterway, and six miles from the Gulf of Mexico Jetties. Major high- ways and rail facilities are also lo- cated nearby. Plans are currently in motion to develop an extensive bulkhead system and dock loading area which would extend for more than 1,000 feet in length, and could support numerous offshore support vessels, crewboats and barges. In addition, facilities are now ex- istent with a multilevel office build- ing, warehouse, loading dock, and small vessel repair operation. Brian D'Isernia, president of Eastern Ma- rine, Inc., has conducted a study with several oil companies, and ser- vice-support groups, and indicates that there is a great deal of interest for a "one-stop" supply base, pro- viding fuel, water, drilling fluids and equipment, tubulars and personnel lodging and transfer facilities. East- ern Marine's proposed supply base would provide all the necessary re- quirements, and in addition the area could also be utilized as a helicopter base. For additional information, Sulzer Brothers Limited of Win- terthur, Switzerland, has intro- duced a longer-stroke version of their 400-mm bore medium-speed, four-stroke cycle engine. The new engine, called the ZA40S, is a long- stroke version of their proven ZA40 engine. By increasing the engine stroke from 480 mm to 560 mm (stroke/bore ratio increase from 1.2 to 1.4), a significant improvement in fuel economy was achieved (4 g/bhp h), while increasing the maxi- mum continuous rating from 870 hp KEEL COOLERS
