1. source signal (sh) signal hkrat sum mat ai shaloi, shing nrai, galaw sa wa na matu ahkyak ai arung arai ni (diaphragm, spring, seal, transmission zawn re ai ni) hkra machyi mat ai shaloi, lata hte galaw ai automatic galaw ai lam hpe lang nna, valve a tara shang bungli hpe matut galaw na matu, lata hte galaw ai n-gang hpe lang ai.
2. lata n-gang hpe zero signal pressure regulating valve hpe hpaw ai (sh) pat da ai shaloi valve hkawm sa na matu retainer hku nna mung lang mai ai, dai lam hta hka lwi ai hpe hkang ai valve loi mi ra ai rai yang, yaw shada ai lam hpe lu la na matu lata n-gang hpe lang mai ai.
3. bakelite handwheel gaw control valve bungli galaw ai lam hpe kam hpa mai ai lam hpe grau kaja hkra galaw ya lu ai, regulating valve hpe additional bypass hku nna, gumhpraw bang ai manu jahpu ni hpe shinggrup ya lu ai, shing nrai, aperture kaba ai shaloi (sh) manu dan ai nlung hpe manu grau hpu ai shaloi, jai lang ai wheel mechanism ni hpe gumhpraw bang ai manu hta jai lang ai shara hpe shinggrup ya lu ai, myit yu ra ai shara langai hpe shinggrup ya lu ai.
