Hōʻike huahana:
ʻO ka valve globe e pili ana i ka valve me ka disc i hoʻokele ʻia e ke kumu ma ke koʻi waena,
hana hoʻokiʻekiʻe ʻana, ʻo ia ka valve poloka maʻamau, hoʻohana ʻia no ka hoʻohui ʻana a i ʻole ka mea throttle medium.
Ma ke ʻano o ke kūkulu ʻana, hoʻokaʻawale ʻia ka valve globe a i ʻole throttle medium.
Ma ke ʻano, J44 ʻano kihi, J45Y ʻano, me ka pono o ka hoʻolālā paʻa, hiki ke maʻalahi,
ikaika ka corrosion, ka huakaʻi pōkole a hoʻohana nui ʻia i ka kemika, ka aila,
lāʻau lapaʻau, meaʻai, metallurgy, pepa, hydropower, mālama kaiapuni etc.

ʻāpana huahana:
Laina mea: PFA, PTFE, FEP, GXPO etc;
Nā ʻano hana: Manual, Worm Gear, Electric, Pneumatic and Hydraulic Actuator.