preventing seawater backflow air vent head

{"cid":"91219628","title":"Preventing Seawater Backflow Air Vent Head-Gooseneck Type Air Vent Cap For Oil Tank,Water Tank Gooseneck Type,","imgUrl":"https:\/\/img.ismap.com\/nimg\/4e\/43\/a3af69151f62e0781de08befd05a-200x200-1.jpg","attrs":{"Price":"Discuss personally","Brand Name":"FEIHANG","Model Number":"FH","Minimum Order Quantity":"5pcs","Delivery Time":"1-2days","Certification":"Factory certificate, test report, material report","Place of Origin":"Yangzhou, Jiangsu, China","Payment Terms":"100% prepaid","Supply Ability":"100pcs\/days","Packaging Details":"Export packaging","Brand":"FEIHANG","Product Name":"Gooseneck Air Vent Head,Gooseneck Air Pipe Head","Size":"FH-50A-250A","Design standards":"Factory Internal Standards","Pressure":"0.3Mpa","Application":"Marine Tank","Body Material":"Cast Iron","Cover Meterial":"SUS316L","Surface Treatment":"Epoxy Paint","FLANGE STANDARDS":"FLANGE CONNECTION SIZE ACCORDING TO CUSTOMER REQUIREMENTS."}}

{"cid":"91184247","title":"WIN2000 TYPE AIR VENT HEAD ALUMINUM ALLOY AIR PIPE SHIPBUILDING-FLOAT BALL TYPE ALUMINUM ALLOY AIR PIPE HEAD","imgUrl":"https:\/\/img.ismap.com\/nimg\/63\/8c\/ee5611c003f4432507a318eaec86-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Fei Hang","Model Number":"FH-FLOAT BALL TYPE","Minimum Order Quantity":"2","Delivery Time":"The 5 day","Certification":"Inspection Report","Place of Origin":"China Jiangsu Yangzhou","Payment Terms":"Advance payment and delivery","Supply Ability":"1000","Packaging Details":"Wooden box","Reference standard":"CB\/T3594-1994","Connection mode":"Flange connection","Nominal pressure":"0.3MPA","Mesh size":"50-200A","Surface treatment":"paint","Material":"Aluminum alloy"}}

{"cid":"91190065","title":"High Safety Pharmaceutical Vented Heads Cleanroom Air Shower","imgUrl":"https:\/\/img.ismap.com\/nimg\/1d\/3b\/1a69a1f370d6db17ace70b05fae9-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"HFD","Model Number":"HDF-FLS-BXG2-2","Minimum Order Quantity":"1","Delivery Time":"5-8days","Certification":"CE ISO9001","Place of Origin":"China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"20 sets per month","Packaging Details":"standard wooden packing","Condition":"New","Product name:":"Air Shower","Application:":"Clean Room Entrace","Warranty:":"1 year","Power(W):":"2.2KW"}}