The 13th COVNA Industrial Salon

COVNA Salon is the largest industrial salon in south China. On 21 December 2019, we hosted the 13th Environmental-Industrial Salon and invited 500 companies to share their experience.

First of all, Mr. Ma of Guangdong Water Treatment Technology Association gave a speech and started our 13th Salon Meeting. The COVNA’s Manager Wong introduced the Salon as a “sharing & win-win” event, and invited the event’s organizers and sponsors to take the stage to pay tribute to the 500 companies who have contributed to the environmental industry.

Next, the guests shared their views on the future direction of environmental protection products, and introduced the latest environmental protection products, and put forward the “Made In China to the world” vision. President Hong of COVNA also shared his views on the environmental industry and his knowledge of business management. Each guest shared valuable experiences and suggestions, which were echoed and applauded by the audience.

At the end of the sharing session, guests leave their cards on the signature wall and interact with others to share experiences and seek new business partners.

After the meeting, we went to dinner, ate wine and food, and enjoyed the wonderful performances.

COVNA has hosted 13 COVNA salons since it was first held in 2016. As COVNA’s motto says, “Co-operation, Win-win”, we hope you will be part of COVNA salons in the future! You can learn more about water treatment technology companies in China and more about COVNA’s products here. We Win Together!

What Is Quarter Turn Electric Actuator?

Quarter Turn Electric Actuator is an automatic device that receives power AC-24V, 110V, 220V, 380V, DC-12V, 24V or works under control signal 4-20mA, 1-5V DC and 0-10V DC. Its function is to drive the valve to start or close at an angle of 90 degrees, in order to achieve the control of fluid flow, the realization of industrial automation. The electric actuator comprises a motor, a torque sensing device, an electrode protection device, a digital communication module and a control module. The parts work together to precisely control the flow of fluid.

With the development of industry, more and more industries appear, even some industries with a bad environment. Then electric actuators can be a good substitute for manual operation. Staff only in the control center to control the opening or closing of the valve, without personal presence, reduce the injury to personnel.

Electric actuators are commonly used with ball valves, Butterfly Valves, gate valves, Globe Valves in a variety of industries to improve efficiency. For example:

  • Water Treatment System
  • Smart irrigation system
  • Chemical Industry
  • HVAC System
  • Paper And Pulp
  • Food Processing
  • Power Plant

Advantages Of Quarter Turn Electric Actuator:

1.Motor: Fully enclosed cage type motor is small in size and inertia, large in torque. Insulation class is F class which can prevent motor over-heating.
2.Manual Override: Handle is reliable, energy-saving. It can be used for manual operation when electricity is off. In automatic operation, it can be fixed inside the clip for easy operation.
3.Indicator: Indicator is assembled on center axis, valve position can be observed. Outside mirror design facilitates position observation and prevents water drops accumulation.
4.Enclosure: High Sealing performance, standard protection class is IP67.
5.Self Lock: Accurate turbo-worm structure can output large torque with high efficiency and little noise (Max. 50 decibel). Service life is quite long. Its self-lock function can stop reverse rotation. Drive part is stable and reliable without additional lubrication.

COVNA manufacture Quarter Turn Electric Actuator with 20 years experience. We provide on-off type, modulating type, intelligent type and explosion-proof type to satisfied client’s needs from different industries.

If you have any needs for the electric actuator, please do not hesitate to contact us!


What Is Rack & Pinion Pneumatic Actuator?

Rack & Pinion Pneumatic Actuator is powered by a clean air, driving the valve to open or close at 90 degrees. According to the structure, the pneumatic actuator can be divided into double-acting actuator and single-acting actuator. They work differently and have different advantages.

Double Acting actuator: Air supply on, air supply off. It opens and closes very quickly.
Single Acting actuator: Air supply on, air interrupt off. High safety performance.

Pneumatic actuators consist of pistons, pinions, seals, springs, and other components including Indicators, bearings & guide.

  • Pistons:

The twin rack pinions 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.

  • Pinion:

The pinion is high-precision and integrative, made from nickelled-alloy steel, full conform to the lastest standards of ISO5211, DIN3337, NAMUR. The dimensions can be customized and the stainless steel is available.

  • Springs:

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

  • O-ring:

NBR for standard applications. Vition and PTFE seal for high and low temperature applications.

  • Bearings & Guides:

Made from low friction, long-life compound material, to avoid the direct contact between metals. The maintenance and replacement are easy and convenient.

  • Indicator:

Position indicator with NAMUR is convenient for mounting accessories such as limit switch box, positioner and so on.

If you have any pneumatic actuators needs, please do not hesitate to contact us!