e. Should not be in the oscillation, the noise big, moist, dust and more places that have strong magnetic field interference inspection experience. b。 Wetting degree: air relative wetting degree and a half more than 85 one hundred percent. Q: pressure stem valve before installation should pay attention to operating a: stem check valve before installation experience stem check valve before installation should implement local performance experience. g。 Power supply requirements: 50 hz, 220 vac or 48 vdcil0 one hundred percent, 24 vdci5 one hundred percent. Instrument facilities in the process of storage for storing background of climatology, physical and chemical background of parameter change of life, therefore actuating instrument performance changes. 一个。 Temperature Marine valve: 10 ~ 35 ℃. h。 Air requirements: cleaning, drying, dew point lower than the minimum background temperature 10 ℃, with compressed air quality standards, pressure is zero. 5 to 0. Secure 7 mpa, pressure, stirring shall not exceed the quota value & amp; plusmn; 10 to one hundred percent. Stem valve before installation should pay attention to the operation of the stem valve before installation inspection experience internal substance stem check valve before installation experience mainly covers the following lists internal substantial meaning: a. Instrument facilities in the process of transporting by random oscillation and loading and unloading of transport tools inspired by all kinds of shocks, the outside, in the process of transporting, background, climatology, such as temperature, moisture conditions can change, because of this, the performance of the instrument in the process of transporting facilities around. Before the actual installation, be sure to test with meteorological test, compression strength test, the starting point at the end of the error, dead zone, return difference, fundamental error testing, leak testing, no-load tests of total travel time, etc. The nature of the stem static special valve testing; B, air tightness test; c。 Tightly closed beta, indispensable from new installation stuffing box; d。 Leak quantity test; e. Light travel time all tests; f。 Insulation performance testing; G, compression strength test. Have no corrosive gas. Stem valve before installation of instrument operation facilities should pay attention to during the installation process by transportation and assembly of actuating mechanical stress effects, also make the performance of the instrument facilities, but because of the installation process is short, because of this, install background lead to less affected. From the factory to the front of the installation, stem valves and accessories by the transport, storage, such as background, different background conditions that stem valves and accessories hair habits can change, because of this, demand before installation inspection experience. d。 Have a satisfactory office lighting, cleaning, safe, quiet, light abundance. 。 Stem valve before installation inspection experience background conditions and other instrument inspection experience background is roughly similar to that of stem valve before installation check experience places background conditions as described below. f。 Should check the experience with the power supply, air and hydraulic pump inspection experience facilities and water supply, drainage facilities. Notes to the order: The national standard) A, A: B: product name, model, nominal size medium and temperature, pressure range C: whether there is attachment, delivery time, and special requirements so that we can correct selection for you. Second, if the valve has been selected by design unit of our company model, please order according to the valves parameters directly with our sales center. Three, it is very important when you use the occasion or the environment is more complex, would you please provide design drawings and detailed parameters, our engineers experts will concentrate on review and analysis for you. We can provide you with professional solutions, including design, customization, complete, operation and service. We've been working on the valve leader in the field of industry, to provide you with the latest knowledge of the valve, the best service, best technical adviser. Thank you for visiting our website, if you have any questions, you can call us, we will be dedicated to provide you with quality services. The factory provides professional ball valve, butterfly valve, gate Industrial Valves, globe valve, check valve, relief valve, safety valve, Marine valve, oil valve, hydraulic control valve and other kinds of valves.
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