| 摘要 |
<p>1,153,634. Valves. GEORGE KENT Ltd. 1 Sept., 1966 [19 Oct., 1965], No. 44226/65. Heading F2V. Valve device particularly for domestic oil fuel systems, combines the functions of a pressure regulator and a safety cut-off valve, and, as shown, includes a filter 18 which can be disposed upstream or downstream of the valve. The valve member 12 consists as shown of a longitudinally grooved piston allowing restricted flow and carrying sealing rings at opposite ends which co-operate with corresponding seats. The valve is connected to a diaphragm 19 responsive to the outlet pressure, through a bell-crank lever 33 and an inverted U-shaped stirrup 32. The valve is loaded to the left by a spring 37 acting on the lever. Spring loading on the diaphragm is adjustable by a cap 25 screwed to the body 20. This carries a spring detent engaging indented positions in the thread for indexing purposes. An adjustable rod 43 in the cap hooks under a bracket 44 fixed to the diaphragm and is used for opening the valve initially to prime the system. Upward movement of the diaphragm is shown externally by a button 37d which when pushed up is retained by a split end thereof engaging frictionally in a hole. The stirrup 32 has an indentation (40), Fig. 4 (not shown), engaged by the head of a pivot pin 38 to normally connect the lever. In the event of excessive pressure arising in the outlet chamber the stirrup pulls away from the pin and the valve is closed on to the inner seat by the spring 37.</p> |
