Globe Valve Classified According to Nominal Pressure, Temperature, Drive Mode

1.Classified according to nominal pressure
(1) vacuum valve: means the pressure of work less than the standard atmospheric pressure.
(2) low pressure valve: it means the valve Nominal pressure PN ≤ 1.6Mpa.
(3) valve: as 2.5,4.0,6.4 Mpa, PN refers to the valve.
(4) high pressure valves: the nominal pressure PN for the 10 ~ 80Mpa valve.
(5) high pressure valves: mean nominal pressure PN ≥ 100Mpa valve.

2. Classified according to Operating Temperature
(1) ultra-low temperature valve: for medium temperature t <-100 ℃ valve.
(2) low-temperature valve: for medium temperature -100 ℃ ≤ t ≤ -40 ℃ valve.
(3) at room temperature valves: for media temperature -40 ℃ ≤ t ≤ 120 ℃ valve.
(4), the temperature valve: for medium temperature 120 ℃
(5) high temperature valves: for medium temperature t> 450 ℃ valve.

3. Classified according to drive type
(1) automatic valve is not need external drives, but need media's own energy to make the valve action of the valve. Such as the safety valve, relief valve, steam trap, check valve, automatic control valve.
(2) power-driven valve: power-driven valve can be used to drive by a variety of power sources.
Electric Valve: With electric valve.
Pneumatic valve: use of compressed air-driven.
Hydraulic valve: pressure-driven liquid with oil.
In addition, there are several drivers for more than a combination of methods, such as gas - electric valve.
(3) Manual Valves: manual valves with hand wheels, handles, levers, sprocket, are manipulated the valve action by human. When the valve opening and closing torque is large, the worm gear reducer can be set between hand wheel and stem. If necessary, you can use universal joints and drive shafts for remote operation.