Fluid Control Thermostat 1/2in NPT

The DERALE Fluid Control Thermostat with 1/2in NPT connections is a remote oil thermostat engineered to regulate engine oil temperature in high-performance and heavy-duty cooling systems. Built from polished aluminum, this dual-inlet, dual-outlet design integrates into remote oil cooler setups where space constraints or plumbing configurations demand a standalone thermostat body separate from the main engine block.

The 1/2 inch NPT female connection points allow straightforward integration into existing hydraulic or oil cooling circuits. NPT (National Pipe Thread) is the standard tapered thread specification for fluid power applications, ensuring reliable, leak-free connections across aftermarket and OEM systems. The polished aluminum construction provides corrosion resistance while maintaining a lightweight profile—critical in applications where every pound matters, from race vehicles to marine engines operating in salt-air environments. DERALE's thermostat maintains consistent oil viscosity by opening and closing in response to fluid temperature, preventing cold-start sludging and high-temperature degradation that shortens engine life.

Users configuring custom oil cooler systems—whether for drag racing, street performance, truck towing, or turbocharged applications—rely on remote thermostats like this model to maintain optimal operating temperatures across variable load conditions. The dual inlet/outlet configuration supports both flow-through and parallel cooling loop designs, making it adaptable to different plumbing architectures.

DERALE is recognized within the cooling system aftermarket for precision-engineered thermostats and oil coolers used in competition and heavy-duty applications. This remote oil thermostat (model 25719) combines proven thermal regulation with compact dimensions (4.35 x 2.3 x 7.35 inches) to fit tight engine bay layouts or remote mounting locations.