a) Kasamalidwe kambiri: Mapangidwe a mabowo ambiri amathandizira ma paldocks angapo kuti atseke zida nthawi imodzi. imatha kuthana ndi kuyambika mwangozi, m'lifupi mwake kumatha kusinthidwa kumanzere ndi kumanja mkati mwa kuchuluka kwa ntchito kuti agwirizane ndi mitundu yosiyanasiyana ya valavu ya mpira. .
b) Kulimbitsa kwamapangidwe, makulidwe a thupi 3mm, oyenera kutseka chipangizo cha valve ya flange ya DN8-DN124 chogwirira cha valve chikatha, chomwe chimatha kutseka zida ndikuletsa kuphonya.
c) Chokhala ndi chizindikiro choteteza maso (Chingerezi.French,Spanish),chikhoza kuikidwa kuti chizindikire munthu amene ali ndi udindo.
d) Wokonzeka kugwiritsa ntchito nthawi iliyonse, loko imatha kutseka mwachangu komanso moyenera zida za valve, kulepheretsa ogwira ntchito yokonza kuti asatsegule mwangozi zida za valve panthawi yokonza.
Mitundu yonse imatha kusinthidwa makonda, nthawi zambiri imakhala yofiira pamtengo.
Maloko okwera kwambiri 9mm. Maloko osaposa 7 atha kuyikidwa.
1.Zoyenera kuteteza chitetezo cha valve ya mpira yomwe imagwiritsidwa ntchito mu petroleum, makampani opanga mankhwala ndi mapaipi.
2.Yoyenera kusungirako madzi, mphamvu yamagetsi, makina oyendetsa mapaipi odziwika bwino pogwiritsa ntchito valavu ya mpira kuti ateteze chitetezo.
3.Zoyenera kupanga chitetezo cha mavavu a mpira omwe amagwiritsidwa ntchito popanga mankhwala, kupanga mapepala, zitsulo, zakumwa ndi machitidwe ena akuluakulu a mapaipi.
4.Zoyenera kuteteza chitetezo cha ma valves a mpira omwe amagwiritsidwa ntchito popanga mipope monga zokongoletsera za mabomba m'makampani omangamanga, chigawo chamalonda ndi malo okhalamo mabanja ndi zipangizo zina zamapaipi okhala ndi ma valve otetezera chitetezo.
Kukonza tsiku ndi tsiku, kukonza, kusintha, kuyeretsa, kuyang'anira ndi kukonza zida.
Mu nsanja, thanki, ketulo (ndi zosiyanasiyana muli), heaters madzi, mapampu ndi zipangizo zina magetsi, kulowa danga, moto, kugwetsa ndi ntchito zina.