Description
Explosion-Proof Motor Options
Explosion-proof motors (Class I Group D; Class II Groups F & G) are available for hazardous locations. Verify electrical ratings directly from the motor nameplate.
Frequently Asked Questions
AOVH-30 Fan-Driven Air-Oil Cooler
▶️ Question: What types of hydraulic or lubrication systems typically require an AOVH-30?
Answer: The AOVH-30 is designed for large hydraulic power units, continuous-duty industrial machinery, marine systems, process equipment, and high-horsepower gearboxes that generate substantial heat. If your system operates for long periods, has elevated working pressures, or experiences significant thermal load, the AOVH-30 provides the cooling surface area and airflow needed to maintain stable oil temperatures.
▶️ Question: How does the AOVHR-30-2 two-pass version improve cooling, and when should I choose it?
Answer: The AOVHR-30-2 increases heat rejection by routing the oil through the core twice, giving it more dwell time for temperature reduction. It also includes an integral relief bypass valve to protect the system during cold starts or viscosity spikes. With a typical flow range of around 4–80 GPM, the AOVHR-30-2 is ideal for demanding applications where higher thermal loads or variable flow conditions are present.
▶️ Question: What are the physical installation requirements for the AOVH-30?
Answer: The AOVH-30 must be mounted horizontally with clear airflow to and from the finned core. Its larger size and weight (approx. 190 lb) require a sturdy mounting surface or frame. Oil should enter the lower port and exit the upper port. Always allow adequate clearance for motor cooling, access to electrical wiring, and routine maintenance. Using flexible hose connections helps reduce vibration and mechanical stress on the cooler.
▶️ Question: What electrical data and noise levels should I plan for?
Answer: The AOVH-30 typically uses a 1 HP TEFC fan motor rated for 115/208–230 V, single-phase, 60 Hz. It operates at approximately 1725 RPM and produces around 84 dB(A). Ensure wiring, circuit protection, and ventilation comply with the motor nameplate. If your installation is in a noise-sensitive area, consider acoustic shielding or placement further from personnel.
▶️ Question: How can I maximize cooler performance and lifespan in demanding applications?
Answer: Keep airflow unobstructed, clean the finned core regularly, and maintain proper oil filtration to prevent fouling. Monitor system pressure and temperature to ensure the cooler is sized correctly—especially at higher viscosities. Check the fan motor, guard, and mounting hardware periodically, and follow lubrication schedules for motors that require greasing. Installing the cooler in a return line or dedicated cooling loop typically offers the most consistent performance.
