◀ High Tensile Epoxy Coated Spring Sets
High tensile spring sets provide high performance in fail safe and emergency shut down operations.
NAMUR Mounting ▶
Direct mounted solenoid connections according to NAMUR standards.
◀ ISO 5211 Bottom Mounting Connection
Base drilling, for valve mounting, and centering, according to ISO 5211/DIN 3337 standards.
High Visibility Position Indicator ▶
The indicator is to remain on the actuator for continuous indication when limit switch is not being used.
CNC Sawing
Sawing with accuracy and precision.
CNC Machining
Advanced CNC machine from German.
Semi-finished Products and Components
Partly finished products, waiting for further processing.
Lasering
Lasering production batch and model info.
Actuator Assembly
Assembled by qualified engineers.
Final Quality Control
100% tested before shipping.
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.
COVNA - Solve your technical questions with solid experience
We are COVNA Automations, one of the top manufacturers of quarter turn actuators and automatic control valve products in Dongguan, China with 18 years experience. Our industrial experience will be useful in your business and projects.
18 Years Operation
Good credit rating. Large quantities of regular clients.
German Imported CNC Machine
Fully automated, high accuracy.
ISO 9001 Certificated
With additional certifications that include TUV SGS RoHS.
Qualified Engineers
Designed and manufactured by experienced engineers.
ODM Services
With access to download 2D & 3D models.
Standardization Production
Stable quality, strict quality control.
Same-day Shipping
Keep a large stock of pneumatic valves.
Global Presence
Find us at the exhibition or contact local representatives.
Packing: COVNA DN200 8 inch 800LB Double Flange Type Metal Seated Forged Steel Pneumatic Actuated Ball Valves packed with foam in carton.