GFQ-1 weather breathing valve GFQ-1 weather breathing valve Overview: GFQ-1-type breathing valve for oil and liquid tank, to exclude the positive and negative pressure gas tank, so that the tank liquid out of convenience, such as tanks. breathing valve is not installed on the liquid out of the tank has some obstacles are likely to arise tank variations and vibration, the product design is reasonable, simple structure, easy to use; a tank of essential products, is indispensable. ? GFQ-1 weather breathing valve performance and features: The new weather breathing valve housing selection of cast iron, steel and aluminum, good corrosion resistance; a valve plate with PTFE material, low temperature resistance, good anti-freeze properties; simple structure?? easy maintenance, safe and convenient;? The new all-weather breathing valve performance in full compliance Ministry of Petroleum Industry standard SY7511-87 regulations. GFQ-1 weather breathing valve Scope:? The new all-weather breathing valve is suitable for storage of flash point below 28 ℃ CPI oil and flash point below 60 ℃ in Group B of oil, such as gasoline, benzene, toluene, kerosene , light diesel oil, engine oil, crude oil and other oil products and chemical products storage tanks of the same nature. ? With new supporting the use of corrugated flame arrester. GFQ-1 weather breathing valve for use: breathing valve mounted on top of the tank, the tank is to solve the positive, negative gas out of the tank so that the liquid does not hampered, when the outer liquid enter a large gas tank Call out (called positive pressure). As the liquid out of the tank when the tank must be sucked into the output of the tank from the outside air (called negative pressure). When breathing stops working as does the tank valve is automatically closed out the liquid-gas leak, the liquid quality tank got a favorable environment protection. Weather breathing valve Maintenance:? In order to use the breathing valve safety inspection before using the guide rod and the valve disc is flexible. ? This valve should regularly (within 6 months) Check vent positive and negative valve disc is flexible, valve disc contact surface for damage, if any damage should immediately overhaul. ? After the repair is complete, everything is normal can be re-used. GFQ-1 weather breathing valve main technical parameters: A-level positive pressure 355Pa (36 mm water column) negative pressure 295Pa (30 mm water column) Class B positive 980Pa (100 mm water column) negative pressure 295Pa (30 mm water column) C-level positive 1765Pa (180 mm water column) negative pressure 295Pa (30 mm water column) GFQ-1 weather breathing valve parts Material: Body Material Carbon Steel WCB, stainless steel 304, aluminum positive pressure valve plate material stainless steel 304, aluminum negative pressure valve plate material stainless steel 304, 316, PTFE PTFE ambient temperature ℃ -30 ~ 60 GB weather breathing valve flange connection Dimensions: GB, JB standard mounting dimensions (mm) D1 D D3 H Mh DN25 70 100 115 180 4 × 10 DN50 110 140 160 255 4 × 12 DN80 150 185 213 260 4 × 16 DN100 170 205 265 290 4 × 16 DN150 225 260 305 330 8 × 16 DN200 280 315 355 350 8 × 16 DN250 335 370 420 400 12 × 16 American Standard weather breathing valve flange connection Dimensions: ANSI, API, ASME for JIS standard mounting dimensions (mm) D1 D D3 H Mh 1 "79.5 108 115 180 4 × 15 2" 120.5 152 160 255 4 × 19 3 "152.5 190 213 260 4 × 19 4" 190.5 229 265 290 8 × 19 6 "241.5 254 305 330 8 × 22 8" 298.5 343 355 350 8 × 22 10 "362 406 420 400 12 × 25