Ukurikije uburyo buciriritse nakazi, DI nicyuma kidafite ingese ziraboneka nkimibiri ya valve, kandi guhuza flange ni PN10, PN16 na CLASS 150 nibindi. Ihuza rishobora kuba wafer, lug na flange. Icyuma cy'irembo valve hamwe na flange ihuza kugirango ituze neza. Icyuma cy'irembo cyuma gifite ibyiza byubunini buto, kwihanganira gutemba, uburemere bworoshye, byoroshye gushiraho, byoroshye gusenya, nibindi.