Product Name: The Valve Type: Straight-Way Material: Cast Iron Application: Check Valve Surface Treatment: Spraying Plastics Connection: Thread Product Description From the raw material casting to processing to the later product surface treatment we are a whole process production line.metal Recycling Machine, metal Straightening Machinery, metal Spinning Machinery, metal Processing Machinery Parts, metal forging Machinery, metal Drawing Machinery, metal Coating Machinery, metal Casting Machinery