Mndandanda wa SL ndi mtundu watsopano wa zida zochizira mpweya, kuphatikiza fyuluta ya mpweya, Pressure regulator ndi lubricator.
Fyuluta yamagetsi imagwiritsidwa ntchito kusefa zonyansa ndi tinthu ting'onoting'ono mumlengalenga, kuwonetsetsa kuti mpweya wabwino umalowa m'dongosolo. Amagwiritsa ntchito zipangizo zosefera zogwira mtima kwambiri, zomwe zimatha kuchotsa fumbi, chinyezi, ndi mafuta kuchokera mumlengalenga, kuteteza magwiridwe antchito a zida zotsatila.
Pressure regulator imagwiritsidwa ntchito kuwongolera kuthamanga kwa mpweya kulowa m'dongosolo kuti zitsimikizire kuti dongosololi likuyenda bwino. Ili ndi mawonekedwe olondola amagetsi owongolera ndi kulondola, omwe amatha kusinthidwa malinga ndi zosowa, ndipo ali ndi liwiro labwino komanso kukhazikika.
Mafuta odzola amagwiritsidwa ntchito popereka mafuta opaka ku zida za pneumatic mu dongosolo, kuchepetsa mikangano ndi kuvala, ndikukulitsa moyo wautumiki wa zida. Imatengera zida zopangira mafuta bwino komanso kapangidwe kake, komwe kamatha kupatsa mphamvu zokometsera zokhazikika ndipo zimakhala ndi mawonekedwe osavuta kukonza ndikuwongolera.