General requirements for pneumatic regulating pneumatic valve

, nominal menstruation ( DN)
pneumatic valve adjustment of nominal menstruation DN followed by numerical optimization should be from the following number system, selected from the unit is mm ( mm） :
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,。
, nominal pressure ( PN）
pneumatic valve adjustment of nominal pressure marks PN followed by numerical should choose, from the following numerical units for/mpa ( /MPa） :
。 ，，，，，，，，，，，，，，，，，。
note: marked in PN with level ( 类) Form the nominal pressure part of the corresponding relations between signs: PN: class; PN:类; PN:类; PN:类; PN:类; PN:类; PN: class
,
a input signal range adjustment of the pneumatic valve standard input pressure signal range: kPa ~ kPa.
b cut type pneumatic valve adjustment, the input signal range can be arbitrary selection within the air pressure rating;
c - with electricity Gas regulating pneumatic valve pneumatic valve positioner, the standard input signal range for dc mA ~ mA;
d user ( Ordering party) Requirements of other standards or the particular range of input signals.

and air supply. , air pressure, the maximum
a pneumatic valve, pneumatic diaphragm regulating kPa. Pneumatic piston pneumatic valve adjustment
b: kPa.
。 , air humidity,
under the operating pressure of gas source its dew point should ℃ lower than the pneumatic valve working environment temperature at least.
。 , air quality,
a gas source should be no significant oil steam, oil and other liquids;
b air should be no corrosive gas, steam and solvent;
c with locator adjust the content of solid particles in the pneumatic valve gas source should be less than. g/m­ , and the particle diameter should be less than & micro; M, the oil content should be less than mg/m­ 。

and normal working conditions unless otherwise specified, regulating pneumatic valve should be able to work in the following atmospheric conditions: temperature
a: - ℃ ℃ ~ + or - ℃ ~ + ℃;
b: relative humidity % % ~
c allows the use of special temperature level, but the temperature should be a multiple of that of the ℃.
, signal over thread
pneumatic actuators and signal transmitting pipe connection thread sizes for M *, M *. , RC, RC /, RC /, according to the user ( Ordering party) Also can use other size.

, end connection type and size a regulating pneumatic valve end connection type for flange, welding or thread;
b to adjust to the pneumatic valve connection type and size should be consistent with GB/T and other corresponding national standards and industry standards;
users (c Ordering party) Require the use of other standards or specific connection type and size.