Pneumatic control valve handwheel hnathawh hi a lian hle. Handwheel mechanism hi regulating valve nen hman dun a ni a, a hmanna ber chu hetiang hi a ni:
1 Air source signal emaw electrical signal emaw a chhiat chuan, emaw, actuator-a thil pawimawh ber ber (diaphragm, spring, seal, transmission, etc.) a chhiat chuan automatic operation chu manual operation-ah thlak tur a ni a, handwheel pawh hman theih a ni. Mechanism hian regulating valve regulating function chu a vawng reng a ni.
2 Handwheel hi valve stroke tihreh nan limiter atan pawh hman theih a ni. (Limit hnathawh) .
3 Handwheel mechanism hian regulating valve hnathawhna rintlakna a tipung thei a ni. Regulating valve-ah bypass dah a nih chuan investment a ngai a ni.
A man a tam a, a hmun a zau a, a calibre a lian emaw, thir hlu tak tak hman a nih chuan a man a to zawk bawk. Investment man emaw floor space emaw ngaihtuah lovin handwheel mechanism hman hi a man a to zawk-.
Chu bakah, single-acting diaphragm valve tan chuan handwheel hnathawh leh hnathawh dan (valve hnathawhna lam) chu directional a ni. Chutih rual chuan, diaphragm-action valve hi a tlangpuiin process pressure tlem leh closing requirement khauh lo, force lian vak lohna hmunah te hman a ni. Chuvangin, handwheel chu direct-a install mai mai a tawk a, labor-saving device handwheel (special tih loh chu) design ngai lovin, bolt hman hi a tak tak a ni lo. Bolt te hi double-acting, piston-type actuators ah hman a ni tlangpui. Double-acting valve hi a ni hauh lo. Wide-ranging double-acting valve hi a tlangpuiin duh duh handwheel hawn leh khar theih a ni.
