Classification of control valves according to their structural forms

(1) is classified according to the form of pneumatic actuator.

(a) membrane actuators. It can also be divided into direct installation (positive action and reaction) and side installation (positive action and reaction).

(b) The piston actuator is divided into proportional type (positive action and reaction and two-position type).

Long stroke actuator

(d) rolling film actuator.

② According to the regulation form, it can be divided into: (a) regulation type; Cut off; (c) adjust the cut-off type.

(3) According to the action type: (a) straight stroke; (b) angular travel.

④ Classification according to the shape of valve core: (a) flat valve core; (b) a plunger-shaped valve core; (c) a window-shaped valve core; (d) a sleeve-shaped valve core; (e) multi-stage valve core; (f) deflecting the valve core; (g) butterfly valve core; (h) spherical valve core.

⑤ Classification according to flow characteristics: (a) Linear type; Equal percentage; (c) parabola; (d) driving fast.

⑥ According to the form of the upper valve cover, it can be divided into: (a) ordinary type; Heat dissipation (absorption) type; (c) long neck type; (d) bellows seal type.

(2) Electric control valve

① According to the form of electrical professional title organization, it can be divided into: (a) Angle line; (b) straight strokes; (c) multi-rotation type.

(2) According to the attachment form: (1) servo amplifier; Limit switch.

③ Classification according to flow characteristics: (a) linear type; Equal percentage; (c) parabola; (d) driving fast.

④ According to the form of upper cover, it can be divided into: (a) ordinary type; Heat dissipation (absorption) type; (c) long neck type; (d) bellows seal type.

(3) Manual control valve. According to the characteristics of the valve core: conical; Plunger shape; Sleeve shape; Multi-level shape; Deflection shape; Butterfly; Spherical or hemispherical.

(4) (electric) hydraulic control valve.

(5) Intelligent control valve.