| Valve in fluid piping systems, valves to control the | | | | ball valve, etc.) the main valve parts (valve, valve cap, |
| device, its main role is to isolate equipment and pipeline | | | | stem, disc, sealing surface) data; valve drive pattern. |
| systems, regulate flow, prevent the return of the | | | | Structural characteristics of stop valves: identification |
| pressure regulation and excretion. Because the pipeline | | | | of the stop valve device, maintenance, and other |
| system to select the most suitable stop valve is very | | | | methods used in the cozy structural characteristics, |
| important, therefore, solution selection stop valve | | | | there are structural features: the structure of the stop |
| characteristics and the method and basis for the stop | | | | valve length and overall height, form the connection |
| valve becomes crucial up. | | | | with the pipe (flange connection, threaded connection, |
| Valve industry so far has been able to produce the full | | | | clamps to connect, external threaded connection, |
| range of gate stop valve, globe stop valve, throttle | | | | welded end connections, etc.) form the sealing surface |
| stop valve, plug valve, ball valve, electric valve, | | | | (Ring of, thread ring, welding, spray welding, stop valve |
| diaphragm valve, check valve, safe valve, relief valve, | | | | body) stem structure (rotation pole, lifting rod) and so |
| steam trap and emergency shut-off valve in 12 | | | | on. |
| categories, more than 3,000 models, more than 4000 | | | | Select cut-off stop valve when the stop valve to clear |
| specifications of valve products; maximum working | | | | the device or devices in use, to determine the working |
| pressure of 600MPa nominal maximum diameter up to | | | | conditions of the valve: for medium, working pressure, |
| 5350mm maximum working temperature of 1200 ℃, | | | | temperature and so on. Connected with the valve to |
| the minimum working temperature of -196 ℃, for | | | | determine the nominal pipe diameter and connections: |
| medium for water, steam, oil, natural gas, strong | | | | flanges, threaded, and welding. Way to determine the |
| corrosive media (such as concentrated nitric acid, | | | | valve operation: manual, electric, electromagnetic, |
| sulfuric acid concentration, etc.) flammable medium | | | | pneumatic or hydraulic, electrical or electro-hydraulic |
| (such as benzene, ethylene, etc.) toxic medium (such | | | | linkage, etc. linkage. According to a pipeline to transport |
| as hydrogen sulfide) explosive medium and radioactive | | | | the media, working pressure, working temperature to |
| medium (metal sodium loop pure water, etc.) pieces of | | | | determine the valve housing and within the selected |
| material bearing bronze valve, cast iron, ductile iron, high | | | | pieces of information: gray iron, malleable iron, ductile |
| silicon cast iron, cast steel, forged steel, high, low-alloy | | | | iron, carbon steel, alloy steel, stainless and acid resistant |
| steel, stainless and acid resistant steel, Hastelloy, | | | | steel, copper alloy. Select the type of valve: closed |
| Inconel Seoul , Monel alloy, duplex stainless steel, | | | | valves, regulating valves, safe valve. Determine the |
| titanium alloy. And can produce all kinds of electric, | | | | type of valve: gate valve, globe valve, ball valve, |
| pneumatic, hydraulic valve actuator. The valve face of | | | | butterfly valve, throttle, safe valve, relief valve, steam |
| so many varieties and complexity of the various | | | | trap, and so on. Determine the parameters of the |
| operating conditions, to select the most suitable for | | | | valve: the automatic valve, according to different need |
| installation of piping system valves that, first of all | | | | to determine the flow resistance to allow the |
| should understand the stop valve of Texing; second | | | | discharge capacity, back pressure, etc., and then |
| method should have a choice of stop valves and Yi | | | | determine the nominal pipe diameter and the valve |
| Ju; Furthermore, the stop valve should follow the | | | | seat hole diameter. Valve used to determine the |
| principle of selection. | | | | geometric parameters: the length structure, form and |
| There are two general characteristics of the stop | | | | size of flange connection, a high degree of opening |
| valve, use and structural properties. | | | | and closing direction after the valve size, connection |
| Use features: the main stop valve to determine the | | | | size and number of bolt holes, the stop valve shape |
| performance and scope, is using the characteristics of | | | | size. Use of existing information: stop valve product |
| the stop valve are: the type of stop valve (closed stop | | | | catalog, product samples, and choosing the right valve |
| valves, regulating stop valves, safe stop valve, etc.) | | | | of valve products. |
| product type (gate valve, globe valve, butterfly valve, | | | | |