Page 40: of Maritime Reporter Magazine (December 1987)

Siemens Off-Delay Timing

Relays Are Compact,

Reduce Panel Space

Siemens 7PU electronic off-delay timing relays are compact to reduce panel space when used in control, starting and protection circuits for switching operations involving off- delay timing functions. They fea- ture long life of 30 million opera- tions, accuracy of ±1% and less than 3% drift.

Siemens 7PU timing relays are

UL-listed and meet NEMA, VDE,

CSA and IEC standards. They are suited for conventional panel mounting or integral DIN snap-on rail mounting.

Siemens electronic timing relays rated operating voltages are 24, 120 and 240, 60 Hz and 24, 110 and 220, 50 Hz. Operating time ranges from

MORE FACTS. . .

MORE STATISTICS 1988

WORLDWIDi: MARITIMI

IMH SI RV CHNSl s

SPECIAL OFFER 50% OFF

ONLY $48.00 PER COPY! 0.06 to 15 seconds and is adjusted steplessly by means of a rotary knob.

The Controls Division of Siemens

Energy & Automation, Inc., manu- factures and markets motor control centers, medium voltage controllers and a full line of control products including contactors, overload re- lays and starters. Headquartered in

Atlanta, Siemens Energy & Auto- mation manufactures electrical and electronic equipment and systems for electric utilities, commercial and residential construction and general industry. A member of the Siemens

Group, the company's products are marketed worldwide.

For more information and free lit- erature from Siemens,

Circle 52 on Reader Service Card

Contromatics Introduces

New High-Pressure Ball

Valves-Literature Available

The Contromatics Commercial

Division recently introduced down- stream-seal, three-piece, two-way,

Vi -inch through 2-inch B Series 3,000-5,000 psi, -20° F to 180° F ball valves with long-life, low-fric- tion Delrin AF® seats and lower stem seals.

The new high-pressure Contro- matics ball valves feature 316 stain- less steel balls and 17-4 PH stems.

The downstream seals minimize seat damage and lower torque. The self-compensating stem allows for normal wear and temperature fluc- tuations. The three-piece design minimized installed cost, while the drop-in center section design re- duces in-line maintenance costs.

Contromatics quarter-turn high- pressure ball valves also feature a double locknut, high-rise handle for easy manual operation. For auto- matic operation, Contromatics high- pressure ball valves may be fur- nished with pneumatic and electric actuators.

Standard construction materials are carbon steel. Options include choice of Buna, EPR, Viton, and

Neoprene body seals.

For more information and free lit- erature from Contromatics,

Circle 55 on Reader Service Card

Third Chesapeake Marine

Engineering Symposium

Set For January 1988

The Third Chesapeake Marine

Engineering Symposium, sponsored by the Chesapeake Section of

SNAME every two years, is to be held at the Sheraton National Hotel in Arlington, Va., on January 28, 1988, in conjunction with the joint meeting of SNAME and ASNE on

January 27.

The purpose of this symposium is to provide a forum for technical presentations, discussions and dia- logue concerning the field of marine engineering. Papers will be pre- sented in four areas of specializa- tion: survivability; propulsion/elec- trical; operation and maintenance; and fluid systems/firefighting.

The registration cochairmen are

Lt. Comdr. Jeffrey Lantz, USCG, and Lt. Comdr. John Grenier,

USCG. Reservations can be made by calling either at (202) 267-0577.

SUBSCRIBE NOW... TO THE ALL NEW '88

WORLDWIDE

MARITIME INDUSTRY CENSUS

Order your copy now of the most complete and comprehensive census in our industry. Included in the census are details and statistics on vessel operations (ocean going, inland, harbor, offshore), offshore drilling, U.S. and foreign Navies, shipbuilding and ship repair (commercial and military).

A review of the census reveals the major role played by the U.S. ship owners/operators and the

U.S. Navy in our industry.

Months of research went into tracking down true ownership of the world's commercial fleet and as evidenced by the results of the census, U.S. corporations own and control the largest portion of the world's merchant vessels. Also examined by the census is the increasing role being played by the U.S. Navy as the industry's largest consumer of marine products.

In preparing this census, hundreds of reference sources were utilized, including MARITIME

REPORTER'S Research Department and Circulation Data Base, U.S. and Foreign Governments,

United Nations, Personal Interviews, Lloyd's Register, Industry Directories, etc. (Vital information not available anywhere else in the industry).

THE U.S. MERCHANT FLEET • Summary—All Vessels (1,000 gross ton and over) By ownership, status and area of employment. • Subsidized Vessels —U.S. Merchant

Marine. • Distribution of oceangoing ship- board jobs. • Foreign flag ships owned by U.S. companies or foreign affiliates of foreign companies. • Size of major maritime fleets (true manager domicile and country of ownership). • Operating —differential subsidy accruals and outlays. • Federal ship financing guarantee (Title XI).

WORLD'S MERCHANT FLEET • Definition of Terms. • World's Merchant Fleet.

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ALL '88

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IRCENSUS censu c i offshore) 'epai military) . shi e h c r th c products. 3 utilized E

U.S Governments •irectories r

OFFSHORE SERVICE VESSELS

TUGBOAT AND INLAND TOWBOAT

FLEETS • American offshore service vessel inventory. • American-owned offshore coastal and harbor tugs.

OFFSHORE DRILLING RIGS • Offshore mobile drilling units under construction-on order.

U.S. SHIPBUILDING • Merchant vessels 2,000 DWT and over (completed in U.S. shipyards). • Ship construction under contract. • Total large merchant vessels under contract in private U.S. shipyards. 52 Maritime Reporter/Engineering News