Improvements to a hydraulic three-chamber system separator BA (WITPU 135, SVGW)

摘要

The object, in a hydraulic system separator, of avoiding generating in the non-return device of the latter located on the admission-pressure side a permanently predetermined pressure loss of approximately 0.5 bar or even, in the case of reliable design, somewhat above this which stems from the downstream appliance or the consumer, is achieved, according to the invention, in that, as proposed in DE 4,129,352 A1, the backflow prevention on the admission-pressure side is formed by two piston surfaces or diaphragms F1 and F2, F1 = admission pressure P1, F2 = discharge pressure P22, downstream of the non-return device located on the discharge-pressure side and downstream of the appliance to be protected. In principle, the abovementioned surfaces F1 and F2 correspond to the front and rear (D<2>ball. pi ) DIVIDED 4 side of a non-return ball. The sides located opposite the surfaces F1/P1 and F2/P22 are each loaded with atmosphere. Thus, the pressure difference (pressure loss) present in any case in an appliance downstream of the system separator BA and upstream of the actual consumer, such appliances being, for example, an injector (water-jet pump) or a water-treatment apparatus (regeneration with acids and alkalis), is to be used for the system separator, in such a way that the pretensioning of the spring of the backflow prevention located on the admission-pressure side does not entail any additional pressure loss in the BA appliance, as is the case in a hydraulically non-balanced adjusting piston of a mechanical GB appliance, here, since, as described above, instead of P1, [lacuna] Original abstract incomplete. <IMAGE>