The market has many options for counterbalance valves. When looking for a CBV, it is important to understand your options and choose a valve designed for your application.
Follow these steps to choose a hydraulic counterbalance valve for your application:
Consider a basic CBV: Many applications are compatible with basic counterbalance valves. They are a cost-effective solution for static and dynamic loads. For example, a cherry picker is compatible with a basic CBV.
Select a pilot ratio: Another factor to consider is the pilot ratio. High pilot ratios are best for consistent and stable loads, and low pilot ratios work for unstable and variable loads.
Choose a relief function: CBVs have two types of relief functions — direct acting and differential area. Direct acting valves are stable, whereas differential area valves are designed for high-flow applications.
Determine if you have a closed center directional valve: Some machines, like the wheel loader, have a closed center directional valve and counterbalanced valves. This application is not ideal for basic CBVs as they would close when the pressure builds up.
Consider the back pressure: Some equipment, like cranes, creates constantly changing back pressure. Systems like these require a counterbalance valve that can adapt to the system conditions as they change.
Look for hose burst protection: While all counterbalance valves protect from burst hoses, some CBVs are designed for additional protection. Special CBVs for hose burst work with the directional valve to control motion. Excavators commonly have this type of counterbalance valve to control the flow and pressure in the cylinders.
