China Globe Valve manufacturers, Globe Valve suppliers, Globe Valve factory. Vatac standard Cast Iron Globe Valves are designed and manufactured to ensure low leakage to international standards, Extensive base line laboratory testing (static and cycle testing) has been performed establishing critical design parameters necessary to achieve low emission sealing in the Vatac stem packing seal area and in the bonnet gasket sealing area, In-house testing procedure has been developed and is periodically performed to ensure that standard product design and manufacturing criteria consistently result in the Vatac cast iron globe Valve meeting a maximum of leakage prior to shipment.