Ludlow double gate valve.

The sectional view shown in this article is of the Ludlow Double Knife Gate Valve, which is constructed from both bronze and iron. By the action of the rod, which acts through the bronze nut of the upper shim, the doors descend parallel to their seats until the lower shim hits the stop (or boss) in the bottom of the housing – the doors and the upper wedge continue their downward movement until the face or bevel of the upper corner comes into contact with the face or bevel of the lower corner. With the valves then downward away from the port or valve opening, the face of the upper wedge moves over the face of the lower wedge by exerting pressure on the backs of both valves, from center bearings, forcing them to pull away and squarely against their seats. When opening the valve, the first turn of the stem releases the top corner from contact with the bottom corner, instantly freeing both valves (or discs) from their seats before they start to rise. The other view shows the valves and wedges for the Ludlow double gate valves.

Ludlow double gate valve doors and corners.

Birch pump valves.

Elsewhere in this issue, you will find an advertisement from Birch Valve & Mfg. Co., of 970 Montana St., Chicago, Ill. This company brings to market an excellent pump valve based on years of experience in this particular field. From this valve we can say the following: they do not deform, curl or stretch, nor do they overlap the seat decks as they only seal on the outer and inner circle. . The company guarantees that it will maintain the efficiency of the pump and eliminate slippage. Since they don’t have screws, nuts or plates to take apart, the cost of adjustments is virtually zero. They are very light in weight and will undoubtedly find the most successful use in water supply services. They cost a little more than regular rubber valves, but will wear out many. They are therefore less expensive in the long term.

Gamon Meter Company.

The attached illustration shows a sectional view of a six-inch current meter manufactured by Gamon Meter Co., of Newark, NJ Speaking of their Watch Dog current meter, they say. The meter is completely made of brass, no iron is used, neither for the outlet box, nor even for the bolts and nuts. This is the only way to properly protect work. The tubers are washed in the delicate. parts of the machine, delay the mechanism, cause endless loss of income and trouble; also, as will easily be seen, to get the best results from this type of meter, it should be inspected regularly and at frequent intervals for sensitivity. Doing this with any degree of housing with rusty bolts and nuts is out of the question. When the cover is removed, the measuring chamber is exposed to view, secured by four large brass hex head screws; can be easily inspected, easily removed, as often as needed. The single wheel cannot get clogged with weeds, garbage, etc., and stand in favor of the business, against the consumer. Foreign objects will simply clog the meter and be detected by the inspector as running slowly. The spindles are made from nickel-copper drawn rods, precision machined and ground, rotating in bearings covered with hard rubber. The impeller is hard rubber, made from a flat, well-seasoned stock, machined throughout; teeth precisely cut on the milling machine and balanced after being attached to the spindle. The gear train is our well-known type, using the internal stuffing box device. The flanges are drilled according to the ASME standard. Connections can be supplied either threaded for wrought iron pipes or bell and lugged for cast iron pipes. Meters using the Venturi principle, depending on a pressure variation, resulting in a more or less complicated and delicate clock mechanism to translate the readings on a card, require expensive installation, and constant care to replace the cards. clock, wind clock, etc., and then is only accurate between a narrow range of flow rates, whether low or high, whatever extreme. It is these points that make the current type of meter so desirable for high flow rates.

Cutaway view of the six-inch Gamon counter.

Bituminous Enamel Company.

In the new submarine pipeline, under the “narrow” of the Catskill aqueduct, the New York Board of Water Supply specified Bitumastic enamel to protect interior and exterior surfaces. This line carries water under New York Harbor to Staten Island. The siphon consists of approximately 10,000 feet of flexible, three-inch, submarine cast-iron pipe laid 8 to 30 feet below the harbor floor. This enamel has been perfected as a means of preventing exterior corrosion of water pipes caused by electrolysis and interior corrosion in the form of tuberculation. The company says: “The load capacity of the pipes is quickly reduced by encrustation. The scraping of the pipes to remove the tubers is not satisfactory, as the encrustations have started to grow again with a resumption of activity (almost three times faster than before scrapping) and the life of the pipe is strongly reduced by faster corrosion of metal. Coating abrasion which occurs frequently between factory dipping and pipe laying is a serious objection to this point of manufacture pipe coating process and the coat of paint applied to the abraded surfaces and around the joints offered a very low protection. The Bitumastic Enamels Co., of New York, claimed to have solved the problem with its Bitumastic enamel, which years of experience have shown to be able to withstand the presence of oxygen and water without deteriorating. In several cases, this enamel has been used in the navy and other services for over two decades without any signs of failure. This enamel is used to a large extent in this country at present on water pipes.

Recent patents

1 155 646. Hose clamp. Frank K. D’Arcy, Kalamazoo, Michigan.

1 155 065. Meter. Frank Lambert, New York, NV

1 155 666. Meter. Frank Lambert, New York, NY

1 155 067. Fluid meter. Frank Lambert, New York,

1,155,742. Meter protection device. Earle A. The Fever, Buffalo. new York

1 155 722. Fire alarm system. Felix Gottschalk, Stirling, New Jersey

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