2011年4月26日星期二

Ball Valves for Plumbing Needs

More recently, on the PEX plumbing and radiant heating networks as brass fittings water shutoff dominated by two products: “valve

cork entrance omental tapered Threaded Brass Ball Valve BVT012D” and “Sweat

Brass Ball Valve BVS012D”. Passport service life of tube-omental valve – 8 years, the average life-at least 1500 cycles, time to failure

– at least 400 cycles. In fact, these valves after 40-50 cycles begin to be capricious: cotton gland packing into a brown porridge, soaked

in water, and the cone stop tube, originally friction to the body under the influence of abrasive solids and sludge sediment in the water

begins to hang out in the body, passing water in the closed position. If you also take into account the extremely high coefficient of local

resistance plug valves (3,5-5,7), it is not surprising that plumbers often just throw the locking cap, leaving the body dubious backdrop of

the pipeline.
As sleeved valves, then the passport MTBF of 1,300 cycles, their actual performance is enough for 20-40 cycles, after which the sediment

accumulated on the sealing saddle, do not allow completely block the flow by turning the valve itself in another “architectural

extravagances.” Moreover, the coefficient of local resistance they simply record – from 16 to 20. That is, at a flow rate of 1 m / sec,

passing through the valve, the pressure of the liquid is reduced by 1 m of water.
With the advent of the market brass ball valves, they immediately appreciated was evaluated, and the demand for these products

increases, as well as their scope. Now such products can be found in any economic stall. However, despite their apparent similarity, not

all ball valves are really reliable and durable. Along with high-quality Italian taps, more and more pushed over in the trade cheap Polish,

Chinese and Turkish valves, whose quality is far from perfect? In the struggle for the vast US market, some sellers have begun to

distribute cheap “consumer goods” for branded products, quite simply to sell a fake, so I’d like to give some practical advice to buyers

’ brass ball valves. As a rule, forgery in performance is much inferior to the original products. Their use in water and heating systems

can lead to accidents and big material losses. Counterfeits can cause serious damage and human health.
Wright Valves BVT034D recognized world leader in designing and manufacturing valves water Italy is known for such major firms as Matca-

Norca, Wright Valves, Bugatti, Giacomini, RBM, Rastelli, Tiemme etc. Italian province of Brescia consists of a huge industrial zone, where

the hangars is fittings under the brand name companies from Germany, Britain, USA, UAE and dozens of other countries. In practice, up to

70% of all ball valves entering the world market, made in Italy, where the business is engaged in more than 2000 companies. Stiff

competition forces the firms to constantly improve its products and production technology. At the heart of high performance ball valves of

the best world producers is the perfection of their design, precise adherence to the requirements of production technology and strict

control of chemical composition of materials.
My goal is either a fake – under cover, used well-known brand, at minimal cost to create an external object like a fake. First, what

saves the underground businessmen, it is – raw. Shells taps and ball valves shall be manufactured from special grades of brass, the

chemical composition of which in USA are regulated by GOST and abroad – national standards. These standards include the copper content 57

-60%, zinc – up to 40%, lead within 0,8-2,2%. (Lead is required to make the brass surface hardness). Illegal vendors typically use non-

ferrous metals, the content of impurities which are not controlled. As a result, manufactured valves, the percentage of lead content in

which, studies show that reaches 5-7%. It is well known that an excess of lead in water is very harmful to health.
Another way of cheating customers – to use for the manufacture of shells cheaper metal – zinc. This is also the risk of

counterfeiting. valve of zinc has increased brittle and may crack on the mechanical and hydraulic influences. There are ball valves, made

from silumin (aluminum alloy). Their reliability is still lower. Savings metal induces dishonest manufacturers to produce the body taps

with wall thickness from 1 to 0,5 mm. This is extremely reduces their reliability. (For comparison, the standard valves manufacturers

Matca-Norca have a wall thickness of 2 mm).
Cases and Ball Valves in the products of leading manufacturers are made by hot pressing or hot forging. Manufacturers producing fake not

spent on buying such technology and its products are manufactured by casting. These products are characterized by an uneven surface of the

body, Conveyor Chain, may have a mixed structure of the material – with aerial shells and, consequently, low reliability. Ball valves

(balls) rigged valves are often not made of brass, and of transformer steel, coated or even without it. Steel balls quickly corrode and

cease to be leak proof. Failure to invest in the copper alloy brass faucet body makes it suspiciously easy. Steel ball compensates for this

lack of weight, masking the presence of thin-wall housing is unacceptable.
Ball – the heart of the valve. Leading manufacturers attach great importance to the quality of the surface of ball valves. Brass Balls

are diamond grinding, they applied anticorrosion coating of nickel or chromium. As a result, the ball gets a perfect mirror surface.

Symptom of products of low quality – a dim, muddy or rough surface of the ball.
It is useful to say how counterfeit valves masquerading as the original. One of the techniques – misspelling the names of famous

companies, such as, Bogati instead of Matca-Norca. Formally, this is not fake, because the original brand is not used. There are cases of

writing only the names of countries, for example, USA, instead of adopting a made in Italy. The distortion of the famous logo, placing it,

for example, not a diamond, but a square or a circle, also serves to confuse the buyer. Evidence of fraud may be the absence of any of the

markings required for specific manufacturers. The sale of gas valves, and found such a primitive form of deception, as replacement faucet

handles on native yellow – gas (gas valves are more expensive). Price savings may be too high, so choose the ball valves are safer from

the range of recognized brands.
The general consumer is difficult to distinguish a fake Launch x431 from the original. Here are some simple tips to help in some cases

this can be done. If you can not buy products directly from the distributor, you can contact him by phone and to clarify whether it is an

official supplier of your seller. All known manufacturers of ball valves have their own web pages. Of these, you can learn about the

mandatory labeling of attributes of products, design features, etc. Some manufacturers place the working drawings of its products. When you

’re all aware of the labeling, dimensions, weight and other attributes of your product, you will easily determine its authenticity.
From the original1checkvalve
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