Sele kudlule iminyaka engaphezu kwama-50 ukususela oko kwaqaliswa ivalvu yebhabhathane engaqhelekanga kathathu, kwaye ibisoloko iphuhliswa kule minyaka ingama-50 idlulileyo. Ukusetyenziswa kweevalvu zebhabhathane kuye kwabandakanya amashishini amaninzi. Ivalvu yebhabhathane yokuqala isetyenziselwa kuphela ukuvalela kunye nokudibanisa imithombo yamanzi. Uyilo lwe-triple engaqhelekanga luphucula umsebenzi wevalvu yebhabhathane. Iye yaba yenye yeevalvu ezisebenza kakuhle phantsi kweemeko ezinzima kakhulu kwinkqubo ebalulekileyo kwizixhobo zepayipi yemizi-mveliso.

Njengoko igama lisitsho, ii-offset ezintathu ezizimeleyo ziyilwe njengeevalvu. Ukungaguquguquki kathathu kuthetha:

• I-offset 1

Umngxuma ubekwa ngasemva komphezulu wokutywina ukuze kubekho indlela yokuhlala eqhubekayo.

• I-offset 2

Ishafti ibekwe kwicala elinye lombhobho/ivalvu ukuze kuthintelwe ukungqubana phakathi kwesitywino nesihlalo

• I-offset 3

Imigca esembindini yesihlalo kunye nekhowuni yesitywina ithambekele ngokubhekiselele kumgca ophakathi wepayipi/ivalvu. Le nxalenye yesithathu ayikuthinteli ngokupheleleyo ukukhuhla. Le engile yekhowuni, kunye ne-eccentric shaft offsets ezimbini, ivumela idiski ukuba ivale isihlalo ngaphandle kokungqubana.

Olu yilo lwesihlalo lukwavumela ukutywinwa okufanayo, ngaloo ndlela kucinywe ngokuqinileyo kuyilo lwesihlalo sesinyithi. Olu yilo lukhetho oluphantsi, olune-torque ephantsi (kulula ukuzenzakalela), kuneevalvu ezihlala zesinyithi zesitayile esinye.

Ii-offsets ezintathu zihlala zisetyenziswa kwizicelo ezifana nomphunga oxinezelekileyo ophezulu (ngaphezulu kwe-150 PSI), umphunga oshushu kakhulu, iigesi kunye neeoyile ezinobushushu obuphezulu, usetyenziso lobushushu obuphezulu lulungile kolu hlobo lwevalvu kuba isihlalo sesinyithi siyadingeka phezu kwesihlalo esithambileyo.