... introduce advanced technology, continuous innovation. Products have been widely used in water conservancy construction users, petrochemical, metallurgy, electric ... proffesional ... Conduit Gate Valves are with Features as below:Available in Double Disc and Single Disc DesignSize Range: 1/2" ... to NACE MR-01-75 on request. Available also in low temperature steels, low alloy steels, stainless steels, ...