bronze check valve 1.body material:B62, B61,B148, 2.trim:B62, B61, ... 3.size range: 1/2" to 16" bronze check valve features:Product Name: B61 check ValveTRIM:B62, B61,B148,monel 400 or other ... , heating and gas supply system,is a production and construction, check valve closed in all kinds of pipeline system is used to ...