The bottom ball valve is composed of a valve body, a valve core, a valve stem, a valve seat, a sealing ring, an actuator (electric actuator, a pneumatic actuator) and the like.
COVNA company main produce: Tank Bottom Ball Valve
• The bottom ball valve is welded or flanged to the bottom of the reactor or tank and other containers by means of a valve bottom flange (flange). Therefore, the residual phenomenon of the process medium usually at the outlet of the container is eliminated, and the function of emptying and discharging is realized.
• The bottom ball valve is composed of a valve body, a valve core, a valve stem, a valve seat, a sealing ring, an actuator (electric actuator, a pneumatic actuator) and the like.
• The bottom ball valve principle is to push the valve flap up or down through the valve stem to achieve the purpose of opening and closing.
• The upper-opening tank bottom valve is that the valve stem is raised and the valve is opened; the lower-expanding tank bottom valve is that the valve stem is raised and the valve is closed.
• All listed output torques are expressed in inch pounds of torque (in. lbs.).
• Charts for available air pressure are expressed in pounds per square inch (P.S.I.).
• COVNA actuators offer ±5° adjustment in the open and closed positions on DA52 through DA-125 models.
• For all other models, adjustment is in the open position only.
• The closed position is 0° fixed. Optional retrofit kits are available to allow for adjustment in both open and closed positions on the DA-160, DA-200 and DA-270 models.
• Ideally suited for many applications within the heating ventilation and air conditioning, water treatment and irrigation markets.
• Rotation angle: 0° to 180° Adjustable angle 0° to 180°
• Air pressure: 2.5~8bar(Double acting), 3~8bar(Single acting)
• Operating ambient temperature: Standard Type:-20°C~+80°C
• High temperature Type: 0°C~+180°C
• Low temperature Type: -45°C~+60°C
• Max Working Pressure: 10bar
• Pressure: 5 to 10 bar
• Work media: Air (PNEUROP/ISO Class 4)
• Connections: ISO 5211 for brackets
• DIN 3337 coupling (star shaped)
• VDI/VDE 3845 for accessories
• NAMUR for work media
• Air supply connection:1/8″ & 1/4″ G type thread.
• Surface material: Hard anodized – 40μm
• Life time: One million times
• Accessories: positioner, Air Filter Regulator, lock up valve, travel switch, handwheel, etc…
COVNA Brand COVNA series actuators which compact design, long life service, high quality, gear and gear rack.
This product is used for 90°C rorarionally valves, such as: ball valves, butterfly valves, plug valves etc.Our company put product quality as the first task, adpots the most advance production and technology, stronger than similar product on both prodcut quality and performance.
0-90° Rotary Pneumatic Actuator Parameter & Drawing
0-90° Rotary Pneumatic Actuator Parameter & Drawing
COVNA company main produce: Tank Bottom Ball Valve
