Smoke damper valve applications in engineering quality requirements (b)

2.2, the regulating role



In ventilation, air-conditioning system piping design, though calculated, but in the actual operation of the project if there is a change in working condition, you need to through the damper parts of the valve system to regulate the air flow for system debugging, the valve fixed aperture, a reasonable allocation to meet the design requirements.



2.3, start the empty role of



Ventilation and air conditioning and smoke extraction systems and fire all centrifugal fans a dedicated exhaust axial flow fan, in the installation and commissioning, in order to ensure safety, so that the minimum starting current motors, are generally no-load start, temporary cut-off line through the valve to achieve .



3, the quality requirements of engineering applications



3.1, product quality requirements



At present, fire prevention, smoke a lot of product manufacturers, we are monitoring the fire, to build trial and the design department should be strictly controlled, so that Party A selection of the "three card" complete, qualified products, the manufacturers have factory certification, organs of public security fire sales permit, the National Fire Protection Building Materials Center for Quality Supervision, Inspection and product inspection reports. Inspection reports from the national-level technical parameters and products that can be reflected in the performance and quality products, on the basis that the national standard "test method damper" GB15930-1995 and "test method smoke damper" GB15931-1995. Quality requirements for their products reflected in five areas:



3.1.1, Temperature Sensor Performance Test action



Of fire dampers, flue gas temperature and valve components, respectively, by the constant temperature water bath, oil bath temperature, through non-action and motion tests, examinations of whether the temperature required to accurately closed.



3.1.2, the closure of the reliability of test



Shut down operation in the test stand 250, the sample from the open position should be flexible and reliable shut down, the parts should be no significant wear, deformation and impact damage to its sealing performance. In order to test the reliability of the closure.



3.1.3, salt spray test



The specimen to spray me in the salt spray test, the sample should be able to reliably shut down the open position in order to test the valve in the actual works in the corrosion resistance.



3.1.4, the air leakage test



Valve pressure differential before and after the required conditions, the sample volume per unit area of air leakage not more than 700Nm3 / (h m2), in order to test the valve closed after the closure of the performance.



3.1.5, the fire resistance test



Through the fire resistance test, in accordance with the provisions of the closure time and the amount of air leakage per unit area of the two indicators to determine the fire resistance of the valve.



In addition the technical parameters from the products of its fire resistance requirements for 3h. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve Three way ball valve V Type Ball Valve
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