Soo bandhigida FLUID-SYSTEM valve tubing, xalka kama dambaysta ah ee lagu ilaalinayo heerkulka ugu fiican iyo tayada dareeraha wareeggaaga haydarooliga. Sidoo kale loo yaqaan valve beddelka, qalabkan muhiimka ah waxaa loogu talagalay inuu ku dhiigo saliidda kulul ee qaboojiyaha ku jira gudbinta hydrostatic, hubinta in heerkulka si joogto ah loo habeeyo, tayada dareerahana la ilaaliyo.