| 摘要 |
<p>1474582 Valves LINDEN-ALIMAK AB 28 Nov 1974 [30 Nov 1973] 51603/74 Heading F2V A valve for a hose-line, to close in the event of a downstream loss of pressure, comprises a closure member 16, in the form of a perforated disc with an axially extending flange 20, is held away from a seat 26 by a helical spring 22. When pressure in an outlet 6 falls below a predetermined value the valve closes under the influence of the pressure drop across the closure member. This predetermined value is set by means of an adjustable throttle in the main flow path through the valve. The throttle comprises three inwardly projecting extensions 28 from a housing member 2 and three radial extensions 30 from a rotatable ring 14 which between them define three flow passages of variable crosssection through which fluid can pass between the housing and the closure member. The throttle may be adjusted by inserting a pin, through a slot in the housing, into a bore 36 in the ring.</p> |
