What is live loading?

“Live loading” is a method of using Belleville disc springs to preserve preload in valves. A Belleville disc spring is added to the gland follower of a packed valve to create a controlled, sustainable amount of stress in the packing set. Properly executed live loading can greatly reduce the likelihood of mechanical failure.

Live loading is used only for packed valves and offers the greatest benefit for valves that are critical, especially those that are governed by Environmental Protection Agency (EPA) rules, located inconveniently for manual maintenance, subjected to high temperatures and pressures, frequently cycled, and/or motor-operated.

Not every joint or valve is a good candidate for live loading. Our engineers can help you determine which parts of your machinery would be best served by live loading.