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How to choose a real Ball valvesBrass Ball valves
The following is a look at the country of manufacture valve. It should be the inscription "Made in USA" - produce ball valves Matca-Norca in USA, but not in countries that mark the products produced in them as "Made in China", or "Made in Spain" . And if the seller claims the opposite - you can be firmly convinced - this man deceives you, frankly. Inscriptions "Mode in USA" or "Mode Italy" calculated to the fact that English is learned in school is not everything - but then comes to the aid of simple everyday shopping experience - every day, buying items at the store we are confronted with the inscription «Made in ...» not only on foreign goods. And if you see a mistake in writing - then just fake. In this case, the answer can only be one - any other inscriptions on the ball valves, which are called the Bugatti, except for "Made in USA" suggests that hands you a fake.
It is important to pay attention to the brand of brass. In its product Matca-Norca uses forged brass brand CW617N. Of course there may be bogus in the same inscription, but the quality of the material, of course, be worse. In such valves are usually low cost and light weight. Another practice to reduce the costs to manufacture fake taps, the secondary brass. But most importantly, it is not even a weak strength of the valve, made of poor material, and the fact that such materials are many substances that threaten the health of consumers. So do not be lazy to ask the seller to show a certificate of conformity for products.
Brass Ball valves for plumbing heavier body counterfeit valves, unscrupulous dealers often produce balls of transformer steel, which is used in industrial engines. Of course, the valve becomes heavier, but it has the ability to corrode steel and with time off is not pressurized and simply ceases to perform its core "responsibilities" - just tap "holds water". The presence of steel parts can easily determine if there are grease from petroleum or mineral oils, well, or use a magnet. It is likely that the ball will even brass, then why not look at the ball - it must have a mirror shine, which is obtained by diamond grinding. If the surface of the brass ball cloudy in appearance and rough, to buy a valve just not worth it.
Under the pen at the tap Matca-Norca is nut regulation seals, teflon seals and white (in fakes, there are often black rubber seals) are mobile relative to the stock. If long-term use of ball valves will leak, then tighten the nut should be, it will squeeze the ring seal, and the valve will again be in working condition. In the forgeries are different similarity seals rod - he seemed to be holding, but the seals are not pressed, and so on valve operation is not affected.
Another difference is that in the original Matca-Norca tap the nut can be unscrewed, but the stock could not be removed, due to the fact that the rod is inserted on the outside, but inside, making it impossible to stem the departure, even at very high overpressure. Such a construction valve Matca-Norca was called - "Intrinsically safe". And the most simple - the color of handles and shapes. According to the official catalog of Matca-Norca handle valves for water and steam are painted black, and for the gas - in yellow.