What is an application of a counter balance valve?
Counterbalance valves are used with cylinders to safely hold suspended loads and deal with over-running loads. This valve can also be used with hydraulic motors and is then commonly called a brake valve. The check valve lets fluid flow into rod-end port to raise the load.
What is a sun cartridge?
Sun’s cartridge valves provide pressure, flow, logic, directional and load control and are available in up to 5 sizes (capacities). Flow capacity ranges up to 400 gallons per minute and cartridges are designed to operate at pressures up to 5,000 pounds per square inch.
What is pilot ratio counterbalance valve?
However, the pilot ratio is one of the most important features when selecting a counterbalance valve. Defined, a pilot ratio is the ratio of pilot area to differential area. This means the higher the ratio, the less amount of pressure needed to assist the valve and unseat the poppet.
What is the function of a shuttle valve?
Its purpose is to seal off one or the other of the inlet ports. There is a shuttle seat at each inlet port. When a shuttle valve is in the normal operating position, fluid has a free flow from the normal system inlet port, through the valve, and out through the outlet port.
What is pressure compensated flow control valve?
Pressure-compensated flow control valves are designed to provide a constant volume flow rate independent of the pressure drop across the valve. By contrast, non-pressure-compensated valves have a variable flow rate that changes if the pressure drop across the valve fluctuates.
Where is Sun Hydraulics located?
In addition to our three plants in Sarasota, Florida, and our operations in Asia-Pacific, Sun Hydraulics has manufacturing locations in Coventry, UK, and Erkelenz, Germany.
How do you test a counterbalance valve?
First the valve is set to just crack open at the desired setting. The pressure is dropped to zero and then brought up to 85% of the setting. The valve is then piloted open and allowed to reseat.
What is the function of a hydraulic counterbalance valve?
Counterbalance valves are hydraulic devices that function using this basic principle: fluid can freely flow through a check valve into the actuator, and reverse flow will be blocked using a relief valve until a pre-set pressure is reached that is set based on the system pressure and load capability.
How does a counterbalance work?
When to use sun’s non vented counterbalance valves?
And like the standard counterbalance valves, these are non-vented valves. These valves can be used as a direct replacement to CB** family valves when: Sun’s family of vented counterbalance valves is insensitive to back pressure at port 2.
How are counterbalance valves used in hydraulics?
Learn how they work and how they differentiate from pilot-operated check valves. Counterbalance valves are used with cylinders to safely hold suspended loads and deal with over-running loads. This valve can also be used with hydraulic motors and is then commonly called a brake valve.
Which is the best family of counterbalance valves?
Our CB** family of counterbalance valves is the industry standard in load-holding applications. Its proven poppet and piston design is suitable for most general applications. Each frame size is available in several pilot ratios and flow gains to meet the operating requirements of a broad range of mobile and industrial hydraulic applications.
What kind of load holding valves does Sun use?
The proven CB** family of valves leverages a proven poppet-and-piston design suitable for most general applications and provides precise, reliable load holding and motion control at an affordable price. Sun also offers LoadMatch and LoadAdaptive load-holding valves for applications where efficiency and stability are critical factors in your design.