Iivalve zokunciphisa uxinzelelo lwe-DBD ziivalve zepoppet ezisebenza ngokuthe ngqo. Zisetyenziselwa ukunciphisa uxinzelelo kwinkqubo yoxinzelelo lwe-hydraulic. Iivalvu ikakhulu ziquka imikhono, intwasahlobo. ipoppet ene-damping spool (izigaba zoxinzelelo 2.5 ukuya ku-40 MPa) okanye ibhola (inqanaba loxinzelelo 63 MPa) kunye nesiqalelo sohlengahlengiso. Ukusetwa koxinzelelo lwenkqubo kuguquguquka ngokungenasiphelo kusetyenziswa into yohlengahlengiso.Intwasahlobo ityhala ipapa kwisihlalo. Itshaneli ye-P ixhunywe kwinkqubo.Uxinzelelo olukhoyo kwinkqubo lusetyenziswa kwindawo yepoppet (okanye ibheyile)

Ukuba uxinzelelo kwitshaneli P lukhuphuka ngaphezu kwevalve ebekwe entwasahlobo, i-poppet ivula ngokuchasene nentwasahlobo. Ngoku i-fluid ye-pressure flows ifom ye-channel P kwi-channel T. I-stroke ye-poppet inqunyelwe ngepini. Ukuze kugcinwe imimiselo yoxinzelelo olulungileyo phezu koluhlu olupheleleyo loxinzelelo lukwahlula kwiinqanaba ze-7 zoxinzelelo. Inqanaba elinye loxinzelelo lihambelana nentwasahlobo ethile yoxinzelelo oluphezulu lokusebenza olunokuthi lubekwe kunye nalo.