Manual valve is a valve basic driving mode. It includes a hand wheel, lever or wrench two direct drive and driven through the transmission mechanism. When the valve start torque is large, it can be driven by a gear or worm gear, in order to achieve the purpose of omission. Gear sub spur gear and bevel gear drive. Gear reduction ratio, suitable for gate and globe valves, worm gear reducer relatively large for flash cocks, ball valves and butterfly valves

手动阀门是最基本的驱动方式的阀门。它包括用手轮、手柄或板手直接驱动和通过传动机构进行驱动两种。当阀门的启力矩较大时，可通过齿轮或蜗轮传动进行驱动，以达到省略的目的。齿轮传动分直齿圆柱齿轮传动和锥齿传动。齿轮传动减速比小，适用于闸阀和截止阀，蜗轮传动减速比较大，适用于旋塞闪、球阀和蝶阀

Pneumatic valves and hydraulic pressure based on a certain air, water or oil as a power source, an air cylinder (or cylinders) and the movement of the piston to drive the valve, general pneumatic air pressure is less than 0.8MPa, hydraulic pressure or low oil pressure is 2.5MPa ~ 25MPa. As for driving the diaphragm; rotary gas, liquid drive means for driving the ball, butterfly or plug. The driving force of hydraulic devices, suitable for driving large diameter valves. Such as for driving plug,...

(1) metal material valves: valve body and other parts made of metallic material. Such as cast iron valves, cast steel valves, valve steel, copper alloy valve, aluminum valve, lead alloy valves, titanium valves, Monel valve. (2) non-metallic materials valves: valve body and other parts are made of non-metallic materials. Such as plastic valves, ceramic valves, ceramic valves, glass steel valves. The following is some stainless steel valve material parameters and specific application (1)...

Structural characteristics of the valve closure member in accordance with the direction of the valve seat can be divided into: (1) gate-shaped cross-section: close member along the seat centers; such as the cut-off valve (2) tap and ball: closure member is a plunger or ball, rotating around the center line itself; if plug, ball (3) gate shaped: the closure of parts moving along the vertical seat centers; such as gate valves, gates and other (4) swing shape: Close the valve seat member...

（1）小通径阀门：公称通径DN≤40mm的阀门。 （2）中通径阀门：公称通径DN为50～300mm的阀门。 （3）大通径阀门：公称阀门DN为350～1200mm的阀门。 （4）特大通径阀门：公称通径DN≥1400mm的阀门