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-25 Fan-Driven Air-Oil Cooler
▶️ Question: What types of hydraulic systems and applications are best suited for the AOVH-25?
Answer: The AOVH-25 is ideal for larger hydraulic power units, lubrication systems, and industrial machinery that generate substantial heat loads. Typical applications include metal processing equipment, large hydraulic presses, multi-axis machine tools, marine systems, high-duty-cycle automation, and industrial gearboxes. Its higher cooling capacity and larger core make it suitable for systems running continuously or under heavy load conditions.
▶️ Question: When should I choose the AOVHR-25-2 two-pass version instead of the standard AOVH-25?
Answer: Choose the AOVHR-25-2 if you need improved heat rejection or added protection from pressure spikes. The two-pass configuration routes oil through the core twice, significantly increasing cooling efficiency. The integrated relief bypass valve helps safeguard your system from excessive backpressure during cold starts or when viscosity rises. With a functional range of about 4–80 GPM, it is ideal for return-line and dedicated cooling loops with demanding thermal requirements or variable operating conditions.
▶️ Question: What are the mounting and installation considerations for the AOVH-25?
Answer: The AOVH-25 should be mounted horizontally with unobstructed airflow through the core. Ensure adequate clearance around the fan, motor, and cabinet for proper air movement and maintenance access. Oil should enter the lower port and exit the upper port. Flexible hoses or vibration isolators are recommended to prevent mechanical stress. For maximum performance, install it in a return line or a dedicated cooling loop with clean, filtered oil.
▶️ Question: What electrical specifications and noise levels should I expect?
Answer: The AOVH-25 uses a TEFC fan motor rated around 1 HP, typically supplied for 115/208–230 V, single-phase, 60 Hz service. At approximately 1725 RPM, it delivers high airflow while operating near 81 dB(A), which is quieter than smaller high-RPM units. Always review the motor nameplate for exact voltage, current, and wiring requirements, and size circuit protection accordingly.
▶️ Question: How do I ensure reliable long-term performance from the AOVH-25?
Answer: Maintain clean, well-filtered oil and keep the cooler’s fins free of dust and debris to preserve heat transfer efficiency. Periodically check mounting hardware, airflow clearance, and the fan guard. Follow the motor’s lubrication guidelines—motors with sealed bearings require minimal service, while others may need scheduled greasing. Proper installation, filtration, and routine cleaning significantly extend cooler life and maintain stable system temperatures.
