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Air Valve for Sewer Water. Wide Material Options: Available in Cast iron, Ductile iron, Stainless steel, Carbon steel, and Plastic. Flexible Sizing: Sizes range from 1/2" to 2" threaded and DN40 to DN300 flanged. High Pressure Resistance: Supports working pressures from PN6 to PN40. Broad Temperature Range: Operates effectively within 0 to 80 degrees Celsius. OEM and ODM Services: Full customization, design-based, and sample-based customization available. Special Requests Accepted: Custom specifications and special requests are available upon request. 100% Quality Inspection: All finished products undergo visual and functional inspection. Fast Lead Time: Peak and off-peak season lead times are within 15 working days.