Round ventilating butterfly valve

Standard: Q/TF-B27D.01

Nominal pressure: PN0.01 、 PN0.05 、 PN0.005Mpa

Nominal diameter: DN200 -6000mm

Square ventilating butterfly valve

Standard: Q/TF-B27D.09

Nominal pressure: PN0.01 、 PN0.05Mpa

Size: 120 × 120-1250 × 1600mm