Feature overview

1.Easy and safe to open the lid. Using the special mechanical structure to avoid accident.

2.Auto-hold at the various position and prevents the tiny rubbish to drop down.

3.Easy specification of the balancer can apply to the different lids.

4.Easy to adjust the torque with the visuality function, constant power can be worked with in the usage.

5.Easy to assemble. The design of integrative structure and the special spring make it completely free maintenance.

6.Opening the lids aslant can be allowed, the maximum oblique angle of W10-W50 is 40 and the maximum obligue angle of W70-W350 is 30, it depends on the torque calculation under the different oblique angle.

Product Parameters

Installation and commissioning instruction

1.Confirm the minimum gap between the base and the top cover, then measure the minimum distance between the cover and the base.

2.Make sure the COB (Connection panel Of the Balancer) and the COc (connection panel of the top cover) are parallel to each other. please use the horizontal adjustment bolt or install the auxiliary washer.

3.According to the size of the base and top cover, making-off the COB and cutting.

4.Welding the cOB, the base plate of top cover and the preassembled accessory together.

5.Confirm the welding strength then do the preliminary test.

5.1 Open the top cover to the position with maximum angle

5.2 For w10-w5o, Rotate the torque adjuster to the opening direction, enhance the pre-torque and screw the bolts firmly.

For w70-w350, Rotate the torque adjuster into the adjustment hole in order of (1)- (2), fix and enhance the pre-torque.

5.3 Under the condition of protection, please close the top cover. Also it should be hold between 10-20° smoothly otherwise please retry the Step.5.2 again.

5.4 Welding and make sure the welding strength quality, rubbing down smoothly.

6.Fine-tuning the opening cover angle (horizontal adjustment bolts) if need.

7.For it needs to keep opening statue or person need to operate into the lid during the working process.After the top cover is opened completely, secure the bolts in the anti-dump spout.

Best Practices for Maximizing Manhole balancer Performance

Correct Selection

Choose a balancer that matches the size, weight, and material of the manhole cover. Heavy-duty covers may require dual balancers.

Environment-Specific Materials

For marine and chemical environments, opt for stainless steel or composite-coated balancers to prevent corrosion.

Scheduled Maintenance

Inspect balancers quarterly in normal conditions, and monthly in high-corrosion or high-usage areas.

Training Operators

Ensure workers are trained in proper opening and closing techniques to avoid damaging the balancer.

Pair Replacement

If two balancers are used together, replace both at the same time to maintain even support.

Follow Manufacturer Guidelines

Adhere to installation and maintenance manuals strictly to extend service life and ensure safe operation.

Conclusion

The manhole balancer is a vital tool for modern infrastructure maintenance, providing safe, efficient, and ergonomic handling of heavy manhole covers. Its applications span municipal sewer systems, telecommunications, industrial plants, transport infrastructure, marine vessels, and energy facilities.

By reducing manual lifting effort, preventing accidental closures, and minimizing strain on workers, manhole balancers improve both safety and productivity. However, like all mechanical devices, they require correct selection, proper installation, and regular maintenance to function optimally.

Common issues such as weakened springs, gas leakage, or corrosion can be avoided with routine inspections and timely replacement. By following best practices—including environment-specific material selection and operator training—users can extend the service life of manhole balancers and ensure reliable operation.

As urban infrastructure continues to grow and maintenance demands increase, manhole balancers remain indispensable solutions for safe and efficient access to underground utilities. Their role in protecting workers and sustaining infrastructure reliability cannot be overstated.