THM – VBSO – Counter Balance Valve
Take absolute control of your most demanding suspended loads with the THM VBSO Series Counterbalance Valve. Engineered to deliver uncompromising safety and smooth motion control in high-stress hydraulic circuits, this heavy-duty overcenter valve acts as a critical failsafe for cylinders handling massive weights. Built to safely endure extreme maximum operating pressures up to 350 bar, the VBSO Series perfectly regulates the lowering speed of hydraulic actuators, entirely eliminating erratic movement, load chatter, and runaway drops. Available in four specialized sizes (6, 10, 15, and 20) with precisely scaled flow rates from 30 up to 80 L/min, it provides the versatile, heavy-duty load-holding power required for the massive machinery that builds our infrastructure.
Core Technical Specifications
- Valve Architecture: Counterbalance / Overcenter Valve
- Model Series: THM VBSO
- Standard Sizes: 6, 10, 15, 20
- Maximum Operating Pressure: Up to 350 bar
- Maximum Flow Rate: 30, 40, 60, 80 L/min (Scaled by size)
- Design Profile: High-Pressure Load Holding, Anti-Chatter Motion Control
Key Features & Engineering Advantages:_
- Extreme 350-Bar Resilience: Machined from high-strength, premium materials specifically designed to absorb the violent pressure spikes and relentless continuous workloads of 350-bar mobile applications, outlasting standard counterbalance valves.
- Flawless Motion Control (Anti-Chatter): By precisely metering the fluid exiting the cylinder, the VBSO strictly controls the actuator's descent. This eliminates the violent stuttering and "chattering" often experienced when heavy loads are lowered, ensuring smooth, highly predictable operator control.
- Absolute Runaway Prevention: Acts as an impenetrable hydraulic lock. If directional control is lost or a hydraulic line ruptures, the valve instantly locks the fluid inside the cylinder, keeping suspended loads rigidly in place and protecting the job site.
- Scalable Volumetric Flow: With sizes ranging from 6 to 20 and corresponding flow capacities of 30 to 80 L/min, engineers can perfectly size the valve to the exact requirements of the cylinder, preventing energy-wasting pressure drops or fluid bottlenecks.
- Thermal Relief Protection: Safely absorbs and bleeds off the thermal expansion of trapped hydraulic fluid, protecting your cylinder seals and structural machine components from heat-induced over-pressurization.
Ideal Industry Applications:-
The extreme pressure rating, versatile flow scaling, and absolute load security of the VBSO Series make it a mandatory safety component for:
- Heavy Civil & Road Machinery: Providing smooth lowering and rock-solid locking for the massive lifting cylinders and heavy leveling screeds on large-scale asphalt pavers, motor graders, and road milling machines.
- Extreme Earthmoving Equipment: Securing the massive boom, stick, and bucket cylinders on heavy tracked excavators and wheel loaders, neutralizing the risk of hose-failure drops.
- Heavy-Duty Material Handling: Serving as the primary load-locking failsafe for the hydraulic winches, telescopic boom extensions, and stabilization outriggers on high-capacity mobile cranes.
- Specialized Drilling & Piling Rigs: Holding and precisely lowering the massive vertical mast and feed cylinders in heavy civil foundation engineering.
