UFrank Lockwood wasekwa ngo-1977 kwaye ikomkhulu lakhe liseHouston, eMelika.UFrank Lockwood unolwazi olubanzi lwevalve kunye nolwazi lweshishini lokubonelela abathengi ngemibhobho esemgangathweni, iivalvu, izifakelo, iiflange kunye nolawulo lweprojekthi, kubandakanya ukuyila, ukuzenzekelayo, i-QA, njl.
Iimveliso zikaFrank Lockwood ziquka iivalvu ze actuator zombane ezingakhuselekanga, ukumodareyitha ii-actuator zombane, iivalvu zombane ezivaliweyo njalo njalo.

I-Flotech yasekwa ngo-1961 kwaye ikomkhulu layo likwi-United States.I-Flotech iye yandisa uluhlu lwayo lweemveliso kunye neenkonzo kule minyaka idlulileyo ngokufumana ezinye ii-subsidiaries.I-Flotech izibophelele ekuboneleleni abathengi ngeentlobo ezintsha zeevalvu kunye needrive, kunye neenkonzo zokulondoloza.
Iimveliso ziluhlu lwevalve yebhola yombane, ivalve yebhabhathane yombane, ivalve yebhola yomoya kunye nezinye iivalve ezizenzekelayo.

I-DYNAQUIP Controls yasungulwa ngo-1935. Ngaphezulu kweminyaka engama-70, bazinikele ekunikezeni imveliso egqwesileyo kunye nenkonzo yabathengi kwi-oyile kunye negesi, ukutya kunye namashishini okusela, njl.Inkonzo eguquguqukayo ukuhlangabezana neemfuno zabathengi bemizi-mveliso, indawo yokuhlala kunye nezorhwebo.Uluhlu lwemveliso lubandakanya ivalve yebhola ezenzekelayo, ivalve yebhabhathane ezenzekelayo, i-actuator ezenzekelayo njalo njalo.

Ubunjineli be-Cr-tec ngumthengisi wombane, i-pneumatic kunye neevalvu zemanuwali.Iimveliso zingasetyenziselwa unyango oluhlukeneyo lolwelo.Iinkonzo zeoli kunye negesi, ukuPhathwa koGutyulo, unyango lwamanzi okusela, izityalo zombane, inkqubo yokuzenzekelayo, ukwakhiwa kweenqanawa, njl.
Iimveliso zibandakanya iivalvu zebhola ezi-2 zombane, iivalvu zebhola ezi-3, kunye nezinye iivalvu ezizenzekelayo.

I-Schneider yinkampani eyaziwayo eneminyaka engaphezu kwe-180 yembali ezinikele ekuboneleleni ngezisombululo ezihambelana nokusingqongileyo nezizinzileyo kwihlabathi liphela.USchneider unoluhlu olubanzi lweevalvu zebhola zombane ukuhlangabezana neemfuno zamashishini akho ahlukeneyo.