I-valve uvemvane i-AWWA C504 inezinhlobo ezimbili, umugqa omaphakathi wophawu oluthambile kanye ne-double eccentric soft seal, imvamisa, intengo ye-midline soft seal izoba ishibhile kune-double eccentric, yebo, lokhu ngokuvamile kwenziwa ngokwezidingo zamakhasimende.Ngokuvamile ingcindezi yokusebenza ye-AWWA C504 ingu-125psi, 150psi, 250psi, izinga lokucindezela kwe-flange liyi-CL125, CL150, CL250.