All products are strictly in accordance with the quality assurance mode of GB/T19001-1994 idtISO9001:1994 quality system design, development, production, installation and service in the design and manufacturing process, and obtained the certificate. The butterfly valve series produced by the company meet the following standards:
Design and manufacture: GB12238-89 standard
Structure length: GB12221-89 standard, GB/T15188.1-94 standard
Flange connection: GB/T17241.6-98 and GB9115-88, GB12380-90, GB4216.4 standard
Flow rate and flow resistance coefficient: JB/T5296-91 standard
Pressure test: GB/T13927-92 standard
Life test: JB/Z248-85 standard
Valve mark: GB12220-89 standard
Product label: JB8 standard
Model preparation: JB308-75 standard
Electric device: GB/T8528-1997 and GB12222-89, GB12223-89 standard
Manual device: JB/T8531-97 standard
Paint film test and painting: GB9286, SDZ014 standard
Steel surface corrosion, derusting grade: GB8982 standard
Packaging, storage and transportation pictorial signs: GB4879 standard
Anti-rust packaging: GB191 standard
Supply requirements: GB12252 standard
Material: gray cast iron HT200-400 meets GB12226-89 standard; ductile iron QT450-10 meets GB12227-89 standard; carbon steel Q235A meets GB12228-89 standard; stainless steel meets GB1220 standard; copper alloy meets GB12225-89 standard; Rubber NBR meets HG4-329 standard; graphite filler JB1712-91 standard; general valve material JB/T5300-91 standard;