توضیحات
Fisher 289 Series relief valves are spring-loaded throttling relief valves used as downstream pressure regulators to protect the system from overpressure. A smooth throttling action minimizes pressure surges in the system during relief operation. 289 Series relief valves are ideal for low-pressure settings due to the increased sensitivity provided by a large diaphragm area. 289 Series relief valves are designed for pressure control; they are not ASME safety relief valves.
Available Configurations: Type 289A: 1/4 NPT spring-loaded relief valve for relief pressure settings of 3 to 22 psig / 0.21 to 1.5 bar, two spring ranges
Available Configurations: Type 289A: 1/4 NPT spring-loaded relief valve for relief pressure settings of 3 to 22 psig / 0.21 to 1.5 bar, two spring ranges
Type 289H: 1 or 2 NPT spring-loaded relief valve for relief pressure settings of 1 to 50 psig / 0.07 to 3.4 bar four spring ranges, in the 1 NPT and of 7 in. w.c. to 10 psig / 17 mbar to 0.69 bar, four spring ranges, in the 2 NPT
Type 289HH: 1 NPT spring-loaded relief valve for relief pressure settings of 45 to 75 psig / 3.1 to 5.2 bar
Type 289L: 3/4 or 1 NPT spring-loaded relief valve for relief pressure settings of 10 to 40 in. w.c. / 25 to 99 mbar, two spring ranges
Type 289U: 1/4 NPT spring-loaded relief valve for relief pressure settings of 5 in. w.c. to 3 psig / 12 mbar to 0.21 bar, two spring ranges
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