Let’s learn about KTR Oil-air cooler OPC with Dai Hong Phat, through the following article!
1. About Dai Hong Phat Corp- KTR Germany
– Dai Hong Phat Corp is the official authorized representative of KTR Germany in Vietnam (KTR Vietnam). We provide genuine transmission shaft coupling solutions, meeting international standards, helping to optimize the performance and durability of machinery systems.
– KTR was established in 1959 in Germany. KTR is an abbreviation of
K – Kupplung (Coupling) | T – Technology (Technology) | R – Rheine (Region)
– KTR products: Rotex shaft coupling, Clampex shaft locking joint, hydraulic brake, …
– KTR Oil-air cooler OPC products supplied by Dai Hong Phat are 100% genuine imported, with full CO/CQ, meeting international quality standards.

Certificate of Dai Hong Phat as Authorized Distributor of KTR Germany in Vietnam
View more: Other KTR Cooling Systems
2. Characteristics of KTR Oil-air cooler OPC
– Manufacturer brand: KTR Germany
– KTR Oil-air cooler OPC is an independent cooling system with an integrated oil pump, suitable for cooling gearboxes.
2.1. Key Features
– The electric motor is rated for IP55 protection.
– ATEX-certified versions are available.
– Motor drive: 230/400V 50Hz & 460V 60Hz; special voltages available upon request.
– Operating temperature: 90°C (higher temperatures may be required).
– Construction:
+ Cooling core (plate and bar) made of aluminum, with black industrial heat dissipation fins (RAL 9005)
+ Fan housing made of steel, painted black (RAL 9005)
+ Fan blades made of PAG nylon
+ Protective grille made of steel, painted black (RAL 9005)
+ Electric motor 230/400 V, IP55
+ Bellhousing and coupling
+ Gear pump with safety valve, pressure 0 – 15 bar, recommended setting value 5 bar
+ Low noise pump, suitable for high viscosity oil
+ Filter with visual maintenance status display, optional
– Classification of KTR OPC Air-Cooled Oil Coolers by power:
+ OPC200 – OPC400: small power series, 0.75 kW motor.
+ OPC500 – OPC600: medium power series, 2.2 kW motor.
+ OPC800 – OPC1000: high power series, 4 – 5.5 kW motor.
2.2. Heat Exchange Structure
The integrated pump draws hot oil from the system → the oil passes through an aluminum heat exchanger → a fan blows cooling air → after cooling, the oil returns to the system in the bypass circuit.
View product specifications: KTR Oil-air cooler OAC
View product specifications: KTR Oil-air cooler PIK
View product specifications: KTR Oil-air cooler OPC2
| FOR ANY INQUIRIES OR QUOTATION REQUESTS, PLEASE CONTACT: SALES DEPARTMENT HOTLINE: (+84) 0906 955 057 – EMAIL: INFO@DHP-CORP.COM.VN |
3. Applications of KTR Oil-air cooler OPC
The KTR Oil-air cooler OPC is used for cooling:
– Cooling media: hydraulic oil, gear oil, lubricating oil, and water-glycol mixtures (≥50% glycol).
– Equipment applications: machine tool systems, elevators, test benches, and industrial drive systems.
– Function: used as a supplementary cooler or in-circuit cooler for oil systems.
View also the article: Oil Cooler Calculation Guide for Engineers
4. Technical specifications of KTR Oil-air cooler OPC
| Catalogue KTR Oil-air cooler OPC |
Installation Instruction KTR Oil-air cooler OPC |



| OPC200 → OPC400 (230 / 400V – 0.75 kW) | ||||||
| Type of cooler | Voltage | Current (A) | Speed (rpm) | Flow (l/min) | kW/°C | Weight (kg) |
| OPC200-4-0.75kW | 230/400V 50Hz | 1.8 | 1400 | 5.7 | 0.07 | 35 |
| OPC200-8-0.75kW | 11.5 | 0.09 | 35 | |||
| OPC200-4D-0.75kW | 5.5 | 0.07 | 35 | |||
| OPC200-12D-0.75kW | 16.7 | 0.09 | 35 | |||
| OPC200-16D-0.75kW | 21.4 | 0.1 | 35 | |||
| OPC300-8-0.75kW | 11.5 | 0.18 | 42 | |||
| OPC300-14-0.75kW | 20.1 | 0.23 | 42 | |||
| OPC300-4D-0.75kW | 5.5 | 0.12 | 42 | |||
| OPC300-12D-0.75kW | 16.7 | 0.23 | 42 | |||
| OPC300-16D-0.75kW | 21.4 | 0.25 | 42 | |||
| OPC400-14-0.75kW | 20.1 | 0.26 | 45 | |||
| OPC400-12D-0.75kW | 16.7 | 0.24 | 45 | |||
| OPC400-16D-0.75kW | 21.4 | 0.27 | 45 | |||
| OPC500 → OPC600 (230 / 400V – 2.2 kW) | ||||||
| Type of cooler | Voltage | Current (A) | Speed (rpm) | Flow (l/min) | kW/°C | Weight |
| OPC500-16D-2.2kW | 230/400V 50Hz | 4.9 | 1410 | 21.4 | 0.35 | 75 |
| OPC500-25D-2.2kW | 33.4 | 0.4 | 77 | |||
| OPC500-32D-2.2kW | 44 | 0.42 | 77 | |||
| OPC500-40D-2.2kW | 53.5 | 0.45 | 77 | |||
| OPC600-16D-2.2kW | 21.4 | 0.47 | 96 | |||
| OPC600-25D-2.2kW | 33.4 | 0.56 | 98 | |||
| OPC600-32D-2.2kW | 44 | 0.61 | 98 | |||
| OPC600-40D-2.2kW | 53.5 | 0.66 | 98 | |||
View the specifications for the OPC800-1000 oil cooler (400/690V) in the product catalog: OPC800-1000
5. Why choose Dai Hong Phat Corp?
– 100% genuine products imported directly from KTR Germany
– Protect customers from counterfeit goods and always provide full CO/CQ documents.
– Goods in stock, fast delivery nationwide 24/7.
– Free technical consultation and support for drawings, catalogs.
– Refined processing workshop to meet individual requirements.
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– Hotline: +84906.955.057 | – Email: info@dhp-corp.com.vn
– Website: https://en.daihongphat.asia/ – https://khopnoitruc.com/ – https://ringfeder.com.vn/









