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XSelector® Sizing Program
Use our online portal or our mobile apps to size products to help achieve optimum performance for your application.
DH Series
Hydraulic Oil, Transmission, and Fuel Cooling
Product Type
Heat Exchanger
Solution
Hydraulic Oil Cooling
Application
Mobile Applications
Technology
Air Cooled, Copper Tube / Aluminum Fin
Radiator Face-Mount Mobile Cooler Core — Hydraulic Oil, Fuel & Transmission Cooling
The Thermal Transfer Products DH Series is a low-cost, high-performance mobile cooler core built for radiator face-mount fuel and transmission cooling, as well as hydraulic oil cooling. Because it’s a core (no integral fan), it mounts against the vehicle’s radiator or another airflow source and relies on that existing airflow — an economical, space-saving way to add auxiliary cooling to mobile equipment.
The design delivers moderate flow rates and high heat removal, with aggressive turbulators that optimize heat rejection even at lower flow rates. An optional internal pressure bypass provides cold-start protection, and material options — including steel tanks and steel fins — are available for rugged off-highway applications where impact and debris resistance matter. Available two-pass (DHR) configurations add flow-path flexibility.
The DH Series is engineered for hydraulic circuits up to 70 HP and oil flows up to 150 GPM in mobile systems, with a maximum operating pressure of 300 PSI and a maximum operating temperature of 350°F. TTP’s XSelector® sizing program — available online and as a mobile app — helps size the right core for your flow, heat load, and airflow conditions.
Consult catalog for additional sizes and technical information.
Product Features
- Hayden interchange
- High strength construction
- Rugged steel manifolds
- 3/4″ Copper tube size
- Aluminum or Steel fins
- Eliminate piping, reduce cost with optional internal pressure bypass
- Mounting brackets included
- Optional partial-flow internal pressure bypass for cold start-up protection
- Optional steel fin/tank components for rugged off-highway duty
For higher HP ranges, view our BOL Series
| Ratings | |
|---|---|
| Maximum Operating Pressure | 300 PSI |
| Test Pressure | 300 PSI |
| Maximum Operating Temperature | 350°F |
| Heat Rejection | Up to 70 HP (52 KW) |
| Oil Flow | Up to 150 GPM (330 LPM) |
| Materials | |
|---|---|
| Tubes | Copper |
| Fins | Aluminum / Steel |
| Turbulators | Aluminum |
| Manifolds | Copper (DH-051 – DH-447), Steel (DH-513 – DH-670) |
| Connections | Brass (DH-051 – DH-447), Steel (DH-513 – DH-670) |
| Configuration | |
|---|---|
| Copper Tube Size | 3/4″ |
| Mounting brackets included | |
| Product Options | |
|---|---|
| Fins | Aluminum or Steel |
| Connection options | SAE or NPT |
| Internal pressure bypass | |
| Steel components | |
| Corrosion resistant marine coating (consult factory) | |
| Partial-flow internal pressure bypass for cold start-up protection | |
| Steel fin/tank components for rugged off-highway duty | |
- All catalog product is available with short lead-times
- Expert application engineers are available to select and size the right product for your application
- XSelector®* is a great tool for optimizing the sizing of TTP coolers. Check out the Apple and Android app stores to download the XSelector® App.
- Our distributor One Status portal allows for on demand quoting of coolers and looking up order status.
- Custom designs are available
- Explore our Custom Engine Cooling Packages
* To register for XSelector® please go to www.thermaltransfer.com/get-in-touch/ and complete the XSelector® Inquiry form and submit.
Download the XSelector® for both Apple and Android formats by searching for XSelector® in their App Stores. You must first register for XSelector® before using it on mobile devices.
Documents
Frequently Asked Questions
It’s a low-cost, high-performance mobile cooler core from Thermal Transfer Products, designed for radiator face-mount cooling of hydraulic oil, fuel, and transmission fluid on mobile equipment.
The DH is a core without an integral fan. It mounts on the face of the vehicle’s radiator (or another airflow source) and uses that existing airflow to cool the fluid — which keeps cost and complexity down.
Hydraulic oil, fuel, and transmission fluid — making it a versatile auxiliary cooler for mobile systems.
Engineered for hydraulic circuits up to 70 HP and oil flows up to 150 GPM, with a maximum operating pressure of 300 PSI and maximum operating temperature of 350°F.
Yes — material options including steel tanks and steel fins are available for impact- and debris-resistant service in harsh conditions.
The DH is a core-only, radiator face-mount cooler that uses existing airflow — the low-cost, lightweight option. The DF is the heavier-duty version with its own DC or hydraulic fan drive and standard steel construction for the most demanding, independent-cooling applications.
Yes, the DH Series is suitable for diesel-powered hydraulic systems. But it depends on the heat you need to reject. DH is rated for up to ~70 HP heat removal and up to 150 GPM oil flow. If your calculated heat load is ≤ ~70 HP, DH can be a fit; if it exceeds ~70 HP, select a higher-capacity series via XSelector® or contact Application Engineering.
Recommended for cold-start protection and variable-duty mobile systems.
Aluminum or steel fins and tanks for high-vibration or corrosive environments.
Yes, the DH Series is optimized for radiator face mount and auxiliary cooling applications.
Configure the DH Series
3D Configurator
Our 3D Product Configurator will allow you to build up the cooler with specific options that are required for your application, view what you have created in 3D, then download the model directly into your format to complete your modeling project.
Talk to an engineer at TTP.
Finding the right thermal management solution shouldn’t be a guessing game. Whether you need a quick price quote, technical specs, or a fully custom engine cooling system designed from the ground up, our team is ready to help.
Fill out the form below, and one of our application engineers will reach out to ensure your equipment stays cool under pressure.