THM – WMAP Pressure switches with fixed differential – Accessories
Automate your hydraulic safety protocols and enhance overall system reliability with the THM WMAP Series Pressure Switch. Available directly from Thm Hydraulics, this robust control component is engineered to instantly open or close an electrical contact the exact moment your hydraulic circuit reaches a precisely calibrated pressure setting. Capable of seamlessly monitoring systems with maximum pressures up to 350 bar, it provides the consistent, automated performance required for heavy civil, road construction, and industrial manufacturing machinery. By utilizing a fixed differential reset mechanism, the WMAP Series prevents rapid, destructive electrical cycling (chatter), ensuring your heavy-duty pumps and valves operate with absolute stability.
Core Technical Specifications
- Component Architecture: Pressure Switch with Fixed Differential
- Model Series: THM WMAP
- Maximum Operating Pressure: Up to 350 bar
- Actuation Mechanism: Adjustable spring-biased piston actuating a microswitch
- Adjustment Method: Graduated manual control knob
- Fluid Compatibility: Hydraulic mineral oil or synthetic fluids with similar lubricating characteristics
Key Features & Engineering Advantages
- Precision Microswitch Actuation: System fluid pressure acts directly upon an internal piston fitted with an adjustable spring bias. Once the exact pressure setting is achieved, the piston is urged forward to immediately actuate a highly responsive microswitch, triggering your machine's PLC or warning systems.
- Fixed Differential Reset: To protect your electrical relays and pump motors from rapid on/off cycling, the switch’s original electrical contact condition is only reset when the hydraulic pressure drops by a specific, fixed value below the target setting.
- Intuitive Field Calibration: The exact pressure setting is easily selected by turning a built-in, graduated control knob. A simple clockwise rotation precisely increases the setting pressure, allowing technicians to make rapid adjustments on the factory floor or outdoor job site without complex calibration tools.
- Extreme 350-Bar Durability: The rugged external housing and heavy-duty internal piston are designed to safely absorb continuous hydraulic hammering and extreme 350-bar pressure spikes without losing calibration.
- Broad Fluid Compatibility: Hydro-dynamically engineered to operate flawlessly in heavy-duty systems running standard hydraulic mineral oils, as well as advanced synthetic fluids with similar lubricating profiles.
Ideal Industry Applications:-
The rugged calibration and automated switching of the WMAP Series make it a mandatory safety and control component for:
- Heavy Civil & Road Machinery: Automating pump cut-offs and triggering critical safety warnings on large-scale asphalt pavers, heavy motor graders, and massive concrete pump trucks.
- Automated Industrial Manufacturing: Ensuring the massive clamping circuits on heavy metal-forming presses and plastic injection molding equipment hit and maintain the exact pressure required before allowing the machine cycle to continue.
- Extreme Earthmoving Equipment: Monitoring critical pilot and main-stage pressures on modern tracked excavators and high-capacity wheel loaders to prevent catastrophic system overloads.
- High-Capacity Power Units: Serving as the automated pressure-regulation brain for centralized hydraulic power packs powering industrial factory floors or offshore marine equipment.
Why Choose the THM WMAP Series?
- Automated System Protection: Instantly reacts to pressure thresholds to protect your expensive pumps, valves, and rigid piping from over-pressurization.
- Eliminates System Chatter: The fixed differential design guarantees stable electrical signals, extending the lifespan of your machine's relays and contactors.
- Rapid On-Site Tuning: The graduated control knob makes dialing in the perfect pressure setting fast, accurate, and entirely tool-free.
