Home > Products > Pneumatic Valve > COVNA Stainless Steel Pneumatic Control Wafer Type Pneumatic Actuator Butterfly Valve
COVNA Stainless Steel Pneumatic Control Wafer Type Pneumatic Actuator Butterfly Valve
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Product Description
Advantages:
● MOQ: 1 set
● 19 years of valve manufacturing experience
● Strong inventory, part of commission returned for bulk delay
● Product quality will be guaranteed for 1 year (12 Months)
● OEM service to help customers to promote their brands
● Offer various international standard, ANSI, JIS, DIN, etc
● Custom complaints handed by one stop professional service
● Inquiry will be replied within 8 hours
Item | Pneumatic Control Wafer Type Pneumatic Actuator Butterfly Valve |
Applicable Standards | GB, DIN, ANSI, ASME, JIS, API |
Size Range | DN50 to DN300, 2" to 12" |
Acting Mode | Double Acting, Sping Return (Single Acting) are Available |
Air Supply Pressure | 2.5 to 8bar |
Operating Pressure | Low Pressure, 1.0 to 1.6MPa (145 to 232PSI) |
Output Torque | 14 to 1170Nm |
Lifespan | 1,000,000 (1 Million) Times |
Angle of Rotation | 90° ±4° |
Shell Material | Aluminum Alloy Extruded |
Body Material | Cast Iron, Stainless Steel are Available |
Disc Material | Cast Iron, Stainless Steel are Available |
Sealing Material | NBR, EPDM, FKM (VITON), PTFE |
Structure | Midline |
End Connection | Wafer, Flange End |
Applicable Media | Control of Water, Air, Gas, Oil, Liquid, Steam |
Temp. of Media | Range from -10 to +80°C (14 to 176°F) with NBR Sealing |
Ambient Temp. | Standard Type: -20 to +80°C (-4 to 176°F) |
Optional Accessories | Namur Solenoid Valve, Limit Switch, F.R.L, Position Indicator, Manual Device |
Application | Food & Beverage, Refining, Desalination, Petrochemical, Chemical, Pharmaceutical, Textile, Pulp & Paper, Mining, Marine and Power Industries |
Lubrication | There is no need for lubrication for standard type under normal operating conditions. Special lubricants should be used under low or high temperature operating conditions. |
CI Butterfly Valve with NBR Sealing
CI Butterfly Valve with PTFE Sealing
SS304 Butterfly Valve with PTFE Sealing
Principle of Single Acting Actuator (Spring Return)
CCW
Air to port A forces the pistons outwards, causing the springs to compress, The pinion turns counterclockwise while air is being exhausted from port B.
Loss of air pressure on port A, the stored energy in the springs forces the pistons inwards. The pinion turns clockwise while air is being exhausted from port A.
CW
Air to port B forces the pistons outwards, causing the springs to compress, The pinion turns counterclockwise while air is being exhausted from port B.
Loss of air pressure on port A, the stored energy in the springs forces the pistons inwards. The pinion turns clockwise while air is being exhausted from port A.
Principle of Double Acting Actuator
CCW
Air to Port A forces the pistons outwards, causing the pinion to turn counterclockwise while the air is being exhausted from Port B.
Air to Port B forces the pistons inwards, causing the pinion to turn clockwise while the air is being exhausted from Port A.
CW
Air to Port A forces the pistons outwards, causing the pinion to turn clockwise while the air is being exhausted from Port B.
Air to Port B forces the pistons inwards, causing the pinion to turn counterclockwise while the air is being exhausted from Port A.
Output Torque Diagram
*NOTE: Make sure that the torque necessary to operate the valve is compatible with the actuator torque (it depens on both actuator type and air supply). Please note that the requested torque depends not only on the valve,but on the working conditions and the safety margins of the plant in question, too. | ||||||
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A: As the name suggests, Normally Open valves allow air to pass when they are not energized (or actuated). Normally Closed valves must be actuated to allow air to pass.
Q: What is the life span of your pneumatic actuators?
A: We have passed 1 million times of product quality test, and obtained the certificate
Q: Does the air actuated valve have a manual override?
A: The air actuator does not have a manual override, but a manual override is provided with optional direct mount solenoid valves.
Q:How fast does an air actuated valve operate?
A: See product specifications. Generally, smaller valves less than 2 inch pipe size, cycle in about one second. Larger valves up to 6 inch pipe, cycle in about 1.5 seconds. A cycle is per 90° rotation
Q:Can I add a High Temperature kit to an existing Valworx air actuated
A:Yes, you would need to select a kit matching both the actuator and valve mounting patterns. See actuator accessories
Q:Can I mechanically adjust the flow rate of an air actuated ball valve?
A: No, but we do offer pneumatic positioners with 4-20mA or 3-15PSI inputs. Positioners allow user to adjust flow 0-100%.
Q:Can I use the air actuated ball valve outside?
A: Yes, air actuated valves are weatherproof per materials of construction. Do not exceed minimum and maximum temperature
specifications.
Q:Do you have a way to confirm the air actuated valve is in the closed position? Open position?
A: Yes, we offer an optional valve monitor/limit switch box. Monitor contains (2) dry contact limit switches used to confirm open and closed position. There is also a highly visual valve position indicator.
Q:What is the maximum allowable fluid velocity?
A:Metal valves: 5 to 10 feet/second, closer to 5ft/sec is better PVC valves: < 5 feet/second
Q:Can you customize the color of the actuator?
A: We can customize different colors, LOGO and so on according to customer's requirements.
Contact Us
- COVNA Industry Automation Co., Ltd.
Product Categories
| Control Valve | Electric Valve | Manual Valve | Pneumatic Valve |
| Safety Relief Valve | Solenoid Valve | Top Selling Product | Ungrouped |
| Water Pressure Reducing Valve |
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