Nominal pressure (PN): type C blue handle: 6 points double outer wire ball valve, type C yellow handle: 6 points double outer wire ball valve [gas], type E yellow handle: 4 points to 6 points double outer wire ball valve, type A red handle: 4 points double outer wire ball valve, type D red handle: 6 points inner and outer wire ball valve, type B red handle: 4 points inner and outer wire ball valve, type B yellow handle: 4 points inner and outer wire ball valve [gas], type B blue handle: 4 points inner and outer wire ball valve, type D blue handle: 6 points inner and outer wire ball valve, F type yellow handle: 4 min to 6 min internal and external thread ball valve, A type blue handle: 4 min double external thread ball valve, C type red handle: 6 min double external thread ball valve, A type yellow handle: double external thread ball valve [gas], Type D yellow handle: 6-point internal and external thread union ball valve [gas] Object of action: boiler structural form: fixed ball valve Applicable industry: nominal diameter of water conservancy (DN) : 15-20 Valve body material: brass eccentric requirements: non-eccentric flow direction: two-way connection type: thread shape: ball temperature environment: normal temperature action mode: single-acting normally open valve action: stop sealing material: EDPM lining material: copper alloy pressure environment: normal pressure applicable medium: water brand: Dewey valve standard: national standard accessories: valve body sealing mode: soft seal null: 1, Three functions: up to the specification and model: type A red handle: 4 points double outer thread ball valve, type A blue handle: 4 points double outer thread ball valve, type A yellow handle: 4 points double outer thread ball valve [gas], type B red handle: 4 points inner and outer thread ball valve, type B blue handle: 4 points inner and outer thread ball valve, type B yellow handle: 4 points inner and outer thread ball valve [gas], type C red handle: 6 points double outer thread ball valve, type C blue handle: 6 points double outer thread ball valve, type C yellow handle: 6 points double outer thread ball valve [gas], D type red handle: 6 points internal and external thread ball valve, D type blue handle: 6 points internal and external thread ball valve, D type yellow handle: 6 points internal and external thread ball valve [gas], E type yellow handle: 4 points to 6 points double external thread ball valve, F type yellow handle: 4 points to 6 points internal and external thread ball valve type (channel position): two-way drive mode: hydraulic control