For domestic specialists in the installation of plumbing fixtures, 25-30 years ago , “American” squeegees and ball valves were the height of technical progress in the industry, and today these types of connecting and shutoff valves have confidently taken their place in the arsenal of any plumbing. The simplicity and reliability of these devices made them very popular and in demand, which in turn gave impetus to the creation of their technical symbiosis - a ball valve with an “American” drive or just an American crane . This combination allows you to get away from the extra threaded connection between the ball valve and the actual fitting of the “American” squeegee (which also needs to be sealed!), allows you to save on expensive brass and processing operations, because. with such a design solution, one part replaces two threaded parts and, most importantly, an “American” crane greatly simplifies the laboriousness of servicing or replacing various devices that require periodic installation / dismantling (for example, filters, pumps, radiators, etc.) Many, who has ever tried to “pack” a classic steel squeegee, consisting of a coupling, a lock nut, a long and a short thread, (and if there are two more such spurs - like, for example, on a heating radiator), they know how troublesome and complicated this operation is . And if you still need to repeat it periodically, disassembling and assembling the sway each time, then all the advantage in the ingenious combination of a ball valve and a self-centering squeegee clutch - "American" . All connection manipulations come down only to pulling off two self-centering parts with a wrench - the “American” threaded coupling itself with inner and outer cones. The only feature of the installation of the ball valve - "American" is the need to use a special key, which tightens the internal threaded fitting of the union nut, which is also used when installing conventional "American" spurs.
Ball valves - "American" can be equipped with a handle - "butterfly" made of aluminum alloys with powder coating (for valves with diameters from 15mm to 32mm with low opening / closing force), and a metal lever with a rubberized handle - for valves of all sizes (and especially for larger diameters where more force is required to operate the valve).
Firm "STA" from July 2013 began production of brass ball valves - "American" - You can already now buy cheap "American" valves with diameters of 15 and 20 mm of Ukrainian production, made of brass LS-59. In the near future - the launch of the production of other sizes of "American" with a ball valve.