29 Aug 2009 @ 12:57 PM 

Fill valves in toilet water tanks are classified as liquid level-actuated valves. Simply put, when the water reaches a predetermined level, a mechanism shuts down the valve filling the tank. The method of actuating this valve is very simple compared to other valve actuation, which are used for the automation of industrial valves and found in many kinds of technical processes from wastewater treatment, power plants to refineries. Valve automation can differ in design and size, with valve diameters ranging from inches to meters.

Actuators are often connected to the stem of a valve. Upon trigger from a signal, valve actuators move a valve to a particular placement using an outside power supply. Manual valve actuators generally do not require outside power sources except when they are large and need excessive torque. They utilize a handwheel to move gears which supply enough torque to shut the valve thoroughly. Electric actuators use single-phase or three-phase AC or DC current to generate the desired torque. Pneumatic actuators convert air pressure into rotary or linear motion, while hydraulic actuators act similarly with the fluid pressure of oil or water. These actuators need to have pressurized lines to supply the actuators: an inlet line and an outlet line. Pilot valves in the actuator lines control the air or liquid supply going to the actuators. All of these parts are readily available through pipe, valve, and fitting (PVF) distributors who are experts in the use of these valves and actuators in numerous companies, situations, and environments.

Rotary motion valves such as ball, plug, and butterfly valves rotate from open to close, generally a quarter-turn or more, but can also involve multiple turns (360

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Last Edit: 29 Aug 2009 @ 12 57 PM

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 20 Aug 2009 @ 7:12 PM 

Tube bending machines help with numerous including the forming of hairpins, return bends, elbow bends, crossover bends, and return elbow bends in metal tubing fabrication. Differing lengths and sizes of tubing can be accommodated by a quality tube bender. Copper, aluminum, stainless steel, and titanium can all be shaped with tube benders by being fed through straightening rolls, cut to the precise length, and bent to varying degrees to create the sought after bend.

On the subject of tube bending, one must acknowledge numerous facets of the task: elongating and compression principles, function of the bend dies, springback and its control, and the likelihood of kinked or buckled bends.

Compression and Stretching

When tubing is bent, two things happen to the metal. The inner wall comes to be thicker by confining of the material, and the outer wall becomes more slight due to stretching. The outside of the curve has further to be extended, so it is stretched more thinly; the inside has a shorter amount of space to travel, as a result it comes more tightly.

Very little support is needed within the tube when its breadth is slight and the wall is thick. As diameter increases, still, the tube does become weaker. If the wall denseness is reduced, it becomes weaker still. Forces pushing on the tube likewise become higher as the radius of the bend becomes less.

The Make Up of Tube Benders

Tube benders have three essentials: a bend die, a clamp die, and a pressure die. The bend die impedes the tube from flattening and comprises the radius of the bend that was sought after. The clamp die secures the tube in place while bending, and the pressure die makes use of the actual force on the tube by bearing down on it toward the bend die.

Regulating Springback

Metal has the penchant to return to its original shape when altered. Springback evokes the tube to reverse its bend from two to ten degrees, depending upon the radius of the bend, the diameter of the tube, and the thickness of the metal.

Kinked or Buckled Bends

Due to hard material which will not condense on the inside of the bend, a tube may kink or buckle. Hard metal, unable to compress, forces back and can cause defects. A plug mandrel can be used to stop the tube from becoming flat and to bend the tube without wrinkles. This device gives integrity to the inner radius of the bend, clenching it securely into the groove of the bend die. Large diameters of thin-walled tubing are known to be tough to bend without defects. A good rule of thumb is be mindful of the ratios of diameter to wall thickness; anything with a ratio over 20 may need a very high end bender with mandrels.

Heavy-duty tubing benders carry a big price because they manage many different factors of the bending method all at once: tubing support, clamping, steady bending action, accurate & consistent die alignment, etc.

Here?s a checklist of things to look for in a quality tube bender or things to try while bending tubing:
1. The ability to make your bending jig more rigid is paramount. If it shifts, the bend will be more likely to wrinkle.
2. Fill your tubing with sand, preferably tamped wet sand to provide internal rigidity.
3. Your tube bender should allow you to provide enough leverage to enable a slow and steady bend. High impact, forced bending leads to crumpling rather than bending.

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Last Edit: 20 Aug 2009 @ 07 12 PM

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 19 Aug 2009 @ 5:08 PM 

The manufacturing business is converting into a increasingly competitive and what often separates a profitable business from an unsuccessful one is simply having the best tools, which typically means obtaining tools that are exact, long-lasting, and produced to exact requirements. Thin saws are one tool where these attributes are especially important and todays manufacturers are taking care to select ones that will meet their needs.

Thin saws, super thin saws, and carbide saws can differ greatly contingent on the cutting needs. Determinants like the number of teeth, sturdiness of the blade, and thickness of the blade are usually what a company will look at. From years of testing, design, and quality control, thin saws are made to be as thin as .0020?, which is even thinner than human hair. This level of precision can make a huge difference in the distinction and efficiency of a company?s cutting needs.

Furthermore, saws can be made of solid carbide or carbide tipped, based on what the task requires. Solid carbide saws, can be more expensive than other metals, last longer and end up saving money on tool costs, regrinding, and machine downtime. Saw tolerances and finish of cut are other areas where solid carbide saws outperform saws made from other substances. Lastly, solid carbide provides the best ratio of cutting speed to minimum cost per unit of production, which is something that all manufacturers look to increase.

Carbide tipped saws are an alternative choice available to manufacturers. Comparable to other thin saws, carbide tipped saws are able to be designed and made to match your exact needs. One choice unique to the thin saw is the integral spacer which is part of the saw as opposed to being a separate component. This characteristic eliminates the chance for dirt or chips to gather.

Even though saws are attainable in stock sizes from online catalogs, businesses should not hold back from asking to have these products modified to suit their needs. If you have a special job it helps to furnish the manufacturer with specific facts about the job. Some areas to consider are: saw diameter, number of teeth, keyway dimension, work material, depth of cut, tolerance required, shape to be created, arbor size, slot width, hub width, hub diameter, machine used, Rockwell hardness, present cutter used, results obtained with present cutter, speed (RPM), feed type, special tooth slot width, hub width, hub diameter, machine used, Rockwell hardness, present cutter usedconfiguration, and whether or not the saws will be used in gang configuration. Supplying as much of this information as attainable will ensure the maximum efficiency for your job.

If your business is thinking about an upgrade in their cutting productivity you should think about acquiring thin saws, carbide saws, or thin saw blades, all products made exactly for your needs.

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Last Edit: 19 Aug 2009 @ 05 08 PM

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