L9 series lug type butterfly valve lug type butterfly valve, valve body material can be divided into gray iron, ductile iron, in strict accordance with the relevant product standards comply with ISO 9001 standards. Product Description: L9 series lug butterfly valve, valve material can be divided into gray iron, ductile iron, in strict accordance with the relevant product standards comply with ISO 9001 standards. Scope: Suitable for water, heating, air conditioning, water supply, water treatment systems and industrial, agricultural systems. Medium can be water, compressed air, oil, gas and other compounds. YES: Central and piping can be installed on the end, you can frequently open. Upper flange ISO 5211-compliant. You can install a variety of actuators and drives; can be used for cut-off and regulating fluid. NO: does not apply to steam system. Diameter: DN25-600