Grading Rings

Grading Rings

grading ring

Are you looking forward to finding grading rings manufacturers and suppliers in China or coming up with an idea to buy grading rings in insulator and arrester?

Check out the following buyer’s guide for high voltage test engineers, operators and beginners, we’ll offer you the high quality grading ring with 24/7 custom service to fit your drawing ideas and plans.

Contact our Highv team today to get your corona shielding solutions and details.

What Are Grading Rings

A grading ring, it is similar with corona ring, which is also used on high voltage equipment. But they encircle insulators rather than conductors.

Although they may also serve to suppress corona, grading rings main purpose is to reduce the potential gradient along the insulator, preventing premature electrical breakdown.

How Do Grading Rings Work

The grading ring is widely used for insulators industries.

The grading ring surrounds the end of the insulator next to the high voltage conductor.

It reduces the gradient at the end, resulting in a more even voltage gradient along the insulator, allowing a shorter, cheaper insulator to be used for a given voltage.

Grading rings also reduce aging and deterioration of the insulator that can occur at the high voltage end due to the high electric field there.

Grading Rings Technical Parameters

Product NameGrading Ring
Raw Material

Aluminum Alloy

Matching FastenersASTM 304 Stainless Steel Or Hot Galvanized Steel
Surface FinishPolishing Silvery Bright
Other Surface TreatmentHot Galvanized/Coating Insulating Varnish
Tube Wall Thickness2.0mm-20.0mm
OEM/ODMAs client’s drawings requirments
Middle Support Plate And BracketAluminum material or It can be customized as drawing requirement
Inner Diameter of Grading RingMinimum 150mm
Outer Diameter of Grading RingMaximum 1000mm
Production Type of Grading RingPipe Bending/Pressure Die Casting
Operating Voltage170kV-4200kV
Drawings SupportCAD/PROE/UG/SOLIDWORKS, etc
Ring Mould At stock or as your drawing new design and production
PackagingCarton Box/Wooden Pallet/Wooden Case
Loading PortShanghai/Ningbo/Any Other Port In China

What Materials Can Be Used For Grading Rings

With the development of technology, aluminum alloy for grading ring production has become the current trend. The use of aluminum alloys to make these rings has the following advantages:

    1. The overall weight of the ring is reduced, which is suitable for insulator installation
    2. Aluminum alloy also has the hardness and strength of some metal, which meets the safety standards of manufacturing
    3. Compared with normal steel, aluminum alloy has stronger oxidation resistance
    4. The metallic luster of aluminum alloy is better than steel, which is more in line with the appearance of grading ring
    5. Compared with the price of stainless steel, the price of aluminum alloy is more affordable and is the choice of China grading ring manufacturers

What Are The Features Of Grading Rings

  • Material: Aluminum Alloy/Stainless Steel
  • Operating Temperature: -80° C-80° C
  • Polishing Bright Surface Finish
  • Preventing premature electrical breakdown

What Are Grading Rings Used For

grading ring application

HIGHV custom made solutions and grading rings are widely used for below different fields:

  • Insulator

  • Surge arrester

  • Current transformer

  • High voltage test equipment

  • Power transmission and transformation line

What We Can Do For Your Grading Rings Project

grading ring manufacturers china

Highv is one of the leading grading ring manufacturers China, Experts in Manufacturing and exporting aluminum grading rings with 30 years’ rich experience.

Our professional engineers team are skilled at AUTO CAD, PROE, SOLID WORKS and UG softwares for your grading rings design and production.

Need a quotation or technical support of grading ring in surge arrester and transmission line, call us or email us to get more information for your projects.

What Is Grading Rings Packaging?

The grading ring packaging can be done by wooden case or carton box.

Wooden case packaging is suitable for heavy weight ones.

Carton box packaging is always for light weight grading rings. It is also convenient for delivering by hands.

In addition, clear labels are tagged on the outside of these packages for easy identification of these rings measurements and quality information.

The big and strength pallet will be used for placing the cartons boxes. It will help packaging more stable during the shipment.

Because of the limit and customs requirements of various countries, so non-fumigation wooden pallets are widely used for carton boxes base support.

How To Choose Right Grading Rings Manufacturer

Over 30 Years R&D Experience

Highv owned advanced processing production equipments which can support you competitive price, high quality, in time delivery and good service. We have strong manufacturing capability, our automatic lathes, CNC machining centers, bending machines, welding machines and pressure die casting equipments plus auxiliary equipment like milling machine, grinding machine, wire EDM and the cooperation of our partners, we are able to support every different grading rings regardless of the samples or mass production.

Powerful Technical Support

Hard work of our quality control and technical design engineers team guaranteed the stable quality and good service.

OEM/ODM Service

Highv is professional at independent development and design. Our professional engineers team are skilled at AUTO CAD, PROE, SOLID WORKS and UG softwares. We are able to design, develop, produce and deliver your order according to your detailed drawings, samples or just an idea.

Flexible Payment Term Support

Grading ring sample order is available. For small sample orders, in order to save the bank charge for customers and seller, West Union, Money Gram are well recommended.
For mass production, normally our company need 50% TT deposit before new production, and the 50% TT balance payment before shipment.

Our Warranty:

Once you receive the grading rings, please open the packaging and check all cargo within 7 days. If there are any quality problems of grading rings, you just provide the photos of damaged them, then we will provide free grading rings for you. According to the number of products, we will provide easily damaged parts for free. We also can provide technical support if you need. Why not contact us here for saving your time and money.

How To Buy Grading Rings From Us

1. Consult: We will recommend the most suitable solutions and grading ring moulds to you after being informed by your inquiries.

2. Quotation: We will offer you with our detail quotation according to the consulted grading ring. You will get the most suitable specifications, the full support and the affordable price.

3. Process Evaluation: Buyers and our side carefully evaluate and discuss all the details (technical parameters, specifications and business terms) of the order to exclude any misunderstanding.

4. Placing Order: If you have no doubt, we will send you the proforma invoice, and then we will sign a contract with you.

5. Production: We will arrange the grading ring production immediately once receiving your signed purchasing contract and payment deposit. The coming news about production will be updated and informed to the buyer during the ring production.

6. Quality Control: The spirit of our company is that safety is the foundation of production and quality makes customers. We pay more attention to quality support, supply scope, inspection, testing standard, shipment packing, after-sales service.

7. Delivery: We will arrange the delivery as the terms in the contract after the confirmation by the buyer.

8. Custom Clearance: We will supply and deliver all the necessary shipping documents to the grading ring buyer and ensure a smooth customs clearance.

9. Support and Service: We will offer professional technical support and free service by Phone, Email, Skype, WhatsApp, Online Live Chat, Remote Service. We also have door-to-door service in some areas.

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