COVNA Products

COVNA HK55-F Flanged Pneumatic Actuated Ball Valve

HK55-F Pneumatic Actuated Ball Valve

with flange connection. Quick open and close, fast-acting, less flowing resistance. Features include compact design, easy operation and maintenance. Well for water, acids and natural gas and other general media. Available in ANSI, JIS, DIN, GB standard.
COVNA as a pneumatic actuated ball valve supplier. We provide various actuated ball valves in all sizes, materials and actuator types for your choice to help your automation easier.
Consult us to get the best price!

Model

  • Actuator Type: Spring Return / Double Acting
  • Air Supply Pressure: 2.5 bar to 8 bar
  • Pressure: 10 / 16 / 25 / 40 / 64 bar
  • Body Material: Stainless Steel 304/316/316L
  • Temperature Of Media: -10 to 180℃ (14℉ to 356℉)
  • Suitable Media: Water, Liquids, Gas, Oil, Air, Steam, Corrosive Medium, etc

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Benefits Of Pneumatic Flanged Ball Valves:

COVNA Pneumatic Flanged Ball Valves provide you with flexible and reliable fluid solutions. Flanged ball valve has the advantages of easy installation, easy maintenance, full diameter and large flow. Can be customized to ANSI standard, JIS standard, GB standard or DIN standard according to your piping needs.

The advantages of pneumatic actuators are explosion-proof, safety, fast response and low cost. Furthermore, it can be used with pneumatic accessories to realize remote control and help you improve production efficiency.

covna-pneumatic-ball-valve
covna-pneumatic-ball-valve
covna-pneumatic-ball-valve

Features Of HK55-F Flanged Pneumatic Actuated Ball Valve:

● Available in single-acting and double-acting pneumatic actuator types for your choice

● Easy to install and change the number of springs to ensure the output torque

●1 million lifespans, responsive and safe

● Available in ANSI, JIS, DIN, GB standard

Technical Parameters Of HK55-F Flanged Pneumatic Actuated Ball Valve:

Actuator Type Spring Return / Double Acting Size Range DN15 to DN200
Connection Flanged (ANSI, JIS, DIN, GB) Structure Type Floating Ball Core
Medium Air, water, steam, oil, gas, fuel, etc Working Pressure 1.0 / 1.6 / 2.5 / 4.0 / 6.4MPa(10 / 16 / 25 / 40 / 64 bar)
Body Material Stainless Steel 304/316/316L Temperature Of Media -10 to 180℃(14℉ to 356℉)
Applications Wastewater treatment, power plant, paper and pulp, packing industry, etc Seal Material PTFE / PPL

Dimension Of HK55-F Flanged Pneumatic Actuated Ball Valve:

Technical Parameters Of COVNA Pneumatic Valve Actuators:

Technical Parameters Of COVNA Pneumatic Valve Actuators:

Structure Rack and pinion pneumatic valve actuator
Mounting ISO5211, NAMUR, DIN3337
Air Supply Pressure 2.5 bar to 8 bar
Double Acting Type Air to open, air to close, air supply failure to keep the current position. Torque range from 8Nm to 4678Nm
Single Acting (Spring Return) Air to open, interrupt air to close, air failure to close. Torque range from 5Nm to 2792Nm
Optional Accessory Positioner, Limit switch, Gearbox, F.R.L, and Pneumatic solenoid valve

COVNA AW Series Pneumatic Actuator:

AW series high torque pneumatic rotary actuator suitable for the large size ball valve which has higher torque needs. Such as trunnion mounted ball valve. To ensure the valve opens or closes smoothly.

● Double acting type: Torque range from 515Nm to 157,300Nm

● Spring-return type(single-acting type): Torque range from 270Nm to 37,000Nm

aw series pneumatic actuator

Technical Parameters of Valve Actuator
Double acting Air to open, air to close, air supplier failure to keep the current position
Single acting N/C Air to open, interrupt air to close, air failure to close
Single acting N/O Air to close, interrupt air to open, air failure to open
Optional accessory Reversing solenoid valve, limit switch box, air filter reducing valve, positioner, handle manual, lock up valve.

 

 

Technical Parameters of Valve Body

 

Body Valve components
Size range DN50~DN400 Sealing material Stainless steel
Body material Stainless tseel Core material Stainless steel
End conection Wafer, Flange Stem material Stainless steel
Operating pressure 1.0, 1.6MPa Applicable media Water, oil, Gas, Liquid, steam, powder, anti-corrosive base
Structure Midline Structure/ A-type

1.Oil and Gas Industry

Pipeline Flow and Pressure Control: Used for flow and pressure control in natural gas and oil pipelines to ensure stability during transportation.
Gas and Liquid Distribution Systems: Regulates the flow of gases or liquids, ensuring precise control under various operating conditions.
Automation of Distribution Systems: Used in refineries and natural gas processing plants to automate fluid distribution and regulate the reaction processes.

2.Chemical and Petrochemical Industry

Reactor Pressure and Flow Control: Used in chemical reactors, storage tanks, and other equipment to control pressure and flow, ensuring stability in the chemical reaction process.
Flow/Pressure Regulation: Regulates the flow of liquids or gases in processes such as polymerization, refining, and distillation to ensure efficient production.
Steam Control: Regulates the flow and pressure of steam in steam generators and distribution systems.

3.Water and Wastewater Treatment

Water Flow Control: Regulates water flow and pressure in water supply and wastewater treatment systems to ensure normal operation.
Gas and Chemical Additions: Regulates the flow of chemicals or gases (such as chlorine or ammonia) added during the water treatment process.

4.HVAC (Heating, Ventilation, and Air Conditioning) Systems

Temperature Control and Airflow Regulation: Used in air conditioning systems to regulate the flow of cooling or heating fluids to maintain the desired temperature.
Pressure and Airflow Regulation: Adjusts the flow and pressure of air in ventilation, air conditioning, and humidification systems to ensure indoor comfort.

5.Food and Beverage Industry

Liquid Flow Control: Precisely controls the flow of liquids in processes such as brewing, dairy production, and beverage bottling.
Temperature and Pressure Regulation: Regulates temperature and pressure during heating, cooling, and sterilization to ensure product quality and safety.

6.Pharmaceutical Industry

Precision Flow Control: Regulates the flow of liquids and gases in pharmaceutical manufacturing processes to ensure precise control of process parameters.
Pressure Control: Adjusts pressure in cleaning and sterilization systems to ensure stable system operation.

7.HVAC Systems

Airflow and Temperature Control: Controls the flow and temperature of air to adjust environmental conditions, ensuring comfort and energy efficiency inside buildings.

8.Steel and Metallurgical Industry

Gas Flow Control: Precisely adjusts the flow of gases such as oxygen and nitrogen during smelting and heating processes to ensure stable furnace temperatures and chemical reactions.
Cooling Fluid Flow Regulation: Regulates the flow of cooling fluids in cooling systems to ensure temperature control of equipment.

9.Thermal and Power Industry

Steam and Water Flow and Pressure Control: Regulates the flow of steam and water in boiler systems, heat exchangers, and power plants to ensure efficient operation of thermal systems.

10.Mining Industry

Slurry Flow Regulation: Adjusts the flow and pressure of slurry during transportation and separation processes to ensure efficient extraction and processing of minerals.

The actuator on my automated valve operates, but the valve won’t turn. Why?

Most likely the valve stem or actuator coupling is broken.

The electric actuator limit switches or the pneumatic actuator position stops are not correctly adjusted.

Probably because there is no air pressure to the solenoid or dirt has jammed it. Also, debris might be trapped inside the valve. Or, the air pressure is not sufficient to operate the actuator. Remember: measure air pressure at the actuator, not at the compressor.

Maybe. First, be sure that the actuator torque output is sufficient to turn the valve reliably. Second, you will have to fabricate a custom mounting bracket and coupling to connect the actuator to the valve.

The valve will stop somewhere between full open and close. When power is reapplied to the original circuit, the actuator will complete the cycle.

To make the change just remove the actuator from the valve and turn it, or the valve stem, 90 degrees and remount the actuator.

Remove the actuator from the valve and check the valve stem. Most ball valves have stem flats at right angles to the flow when the valve is in the off position. On butterfly valves check the stem flow arrow marking.

Remove the actuator from the valve and check the valve stem. Most ball valves have stem flats at right angles to the flow when the valve is in the off position. On butterfly valves check the stem flow arrow marking.

Check the electric wiring schematic that came with the actuator for the correct hookup. Sometimes a copy is inside the actuator cover. If it is missing, don’t guess about the connections. Call the manufacturer for a schematic.

The actuator is wired incorrectly (check the schematic accompanying the actuator), or the external control switch is not the correct type for the actuator.

Not unless you bought it with an optional speed control.

Actuators and solenoid valves require different types of electrical control switches. SPDT for actuators, SPST for solenoids. Check the actuator wiring schematic for the correct wiring and switch type.

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