Manual valve hpe lang ai shaloi, valve hpe hpaw ai shaloi, n-gun grai n law ai, accident n byin hkra, n-gun n-gun hpe myit maju jung ra ai. Manual valve ni hpe hkrak jai lang ai lam gaw lawu na hte maren rai nga ai.
Valve hpe tup hkrak hpaw dat ai shaloi, n-gang hpe n-gun n rawng hkra, n-gun n rawng hkra, n bung ai maga de loi mi kayin ra ai. Ndai shara kaw rawt jat wa nga ai n-gang hpe myit maju jung nna, valve stem a hkrak ai shara hpe hkum tsup hkra hpaw nna, hkum tsup hkra pat da ai shaloi, hkrak hkrak pat da ai hpe dum u, dai hku nna, hkum tsup ai hku hpaw ai shaloi, ntsa na si ai center hte n-gun n-htum mat hkra. Hkum tsup ai hku pat da ai shaloi hpa manghkang n nga ai kun ngu ai hpe mung jep yu na matu mung karum ya ai. valve disc gaw n-gun n rawng ai rai yang, shing nrai valve core sealing daw hpe kaga n-gun law law hte kayau nna, rod a shara gaw hkum tsup ai hku pat da ai shaloi galai mat na re, dai majaw valve sealing maga (sh) valve lata leng hpe mung hkra machyi shangun na re.
valve hpaw ai lam a mabyin: butterfly valve, ball valve hte plug valve a npawt nhpang ntsa kaw na groove gaw channel hte parallel rai nga ai shaloi, valve gaw hpaw da ai shara hkum tsup ai shara kaw nga ai ngu ai lachyum rai nga ai; valve rod gaw hkra maga (sh) pai maga de 90℃hku shinggrup ai shaloi, groove gaw channel de dingyang rai nga ai, lachyum gaw valve gaw hkum tsup ai hku pat da ai shara kaw nga ai. Nkau mi plug valve stem top, butterfly valve, ball valve hpe channel galaw nna wrench galaw nna, hpaw na matu vertical hku nna parallel line langai mi de shang wa ai. Masum ngu na- lam masum hte valve mali a bungli galaw ai ladat hpe hpaw ai, hpaw ai hte nhtang wa ai masat kumla ni hte maren galaw ra ai. Teng sha galaw ngut ai hpang, rotary handle hpe shaw kau ra ai.
