Aluminum Alloy Rotary Pneumatic Valve Actuator Spring Return Double Acting Pneumatic Control Valve Actuators

• Customization: Available
• Media: Gas
• Power: Pneumatic
• Model NO.: AT Series
• Type: at Series Pneumatic Actuator
• Warranty: 1 Year
• Control Mode: Double Acting or Single Acting(Spring Return )
• Bottom Mounting Connection: ISO 5211/DIN 3337
• Port Size: 1/2-3 Inch
• Temperature of Media: Medium Temperature
• Protection Category: a/B
• Air Supply Pressure: 2.5 to 8 Bar
• Customized Support: OEM
• Operating Media: Dry Air, Non-Corrosive Gases
• Structure: Control
• Application: General
• Lifespan: 1,000,000 Times Rotation
• Actuator Material: Aluminum Alloy
• Trademark: COVNA
• Origin: Guangdong, China
• Production Capacity: 10000 Piece/Pieces Per Month

Product Description

 

Products Description

 

Feature of Pneumatic Valve Actuator:

Preloaded coating springs are made from the high-quality material for resistance to corrosion and longer service life, which can be demounted safely and conveniently to satisfy different requirements of torque by changing the number of springs.

ISO5211 standard for ball valves or butterfly valves.
DIN3337 and NAMUR Standard for pneumatic accessories.
Twin rack pistons are made from die-casting aluminum treated with hard anodized or made from cast steel with galvanization, symmetric mounting position, long cycle life and fast operation, reversing rotation by simply inverting the pistons.
It has a number of springs inside and will auto return once air is interrupted and it could keep the valve and project safe.

Item	Single Acting/Double Acting Pneumatic Actuator
Acting Mode	Double Acting, Spring Return (Single Acting) are Available
Air Supply Pressure	2.5 to 8bar
Output Torque	14 to 1170Nm
Lifespan	1,000,000 (1 Million) Times
Angle of Rotation	90° ±4°
Shell Material	Aluminum Alloy Extruded
Applicable Media	Filtered, Dry Compressed Air, Non-Corrosive Medium
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.

 

 

 

 

Comparison

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.

Buyer Feedback

Company Profile

 

VR

Company Strengths:

COVNA-Specialized Manufacturer of High Quality Actuated Valve for 22 Years.

German imported manufacturing facilities, 100% Q.C passed before shipping, quality assured.
Extensive flow control project experience and various product solutions can beoffered.
OEM / ODM service available. Can do JIS 5K / 10K, ANSI 150lb / 300lb / 600lb / 900lb standard.
Inquiry will be replied within 8 hours.
Custom complaints handed by one stop professional service.
ISO 9001certificated, with extra certifications include CE, TUV, RoHS, SGS, BV, explosion & fire safe.
Industrial standard 1 year warranty.

Exhibition&Finished Project

Packaging & Delivery

FAQ

Q: What is the difference between Normally Open and Normally Closed valves?
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.