What is the reverse pressure rating in kilograms for a three-eccentric butterfly valve?
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I currently have a 16-inch, 150-pound low-temperature triple-eccentric butterfly valve. What is the standard for performing reverse pressure testing, and what is the pressure in kilograms?
If there is a defined direction, pressure should be applied in accordance with that direction. In the case of reverse testing pressure, this is used to detect leaks in the packing of the actuator’s spindle; in such situations, pressure should be applied at both ends when the device is turned on, and the test should be conducted at multiples of the specified pressure value. For reference.
Doesn’t the manufacturer provide this parameter? Are there parameters in the specifications? Won’t the manufacturer conducting this test do it? Is on-site re-inspection still required?
Before installation, the valve must undergo a pressure test. Two blind flanges are used, with small openings made in them to accommodate the valve. Pressure is applied at the inlet side of the valve to check whether there are any leaks at the valve opening (valve core). Then, with the valve in the open position, a blind plate is added at the outlet to test for leaks at the valve stem packing. As for some of the current small-bore ball valves, those with pressure gas inside, and which emit a sound of gas escaping when opened, are considered to be of qualified quality. 1. The manufacturer has already indicated the nominal pressure on the valve label. 2. Yes. 3. The valves are to be inspected in this manner upon arrival at the site. 4. Re-inspection is required before it can be installed in operation, and the approval of the supervisor and the client must be obtained. For reference.