Vavu

Tili ndi owunika omwe amayang'anira kuyang'anira ma valve. Amadziwa bwino za kapangidwe kazinthu monga API 594, API 600, muyezo woyeserera monga API 598, API 6D, ASME B 16.24, ASME B 16.5, ASME B16.10, MESC SPE 77/xx serie sec.
Titha kuphimba ntchito zoyendera (kafukufuku wazinthu, kuyang'anira ndi kuyesa, FAT ndi kuyang'anira komaliza) pazinthu zosiyanasiyana zama valve, kuphatikiza valavu yachipata, valavu yapadziko lonse lapansi, valavu yoyendera, valavu ya mpira ndi valavu yotetezera etc.