Automotive
Construction
Agriculture
Livestock
Planting
Spray
Male DKO x Female DKO Adapter
This is where Helesul DKO (Double Cone O-ring) hydraulic adapters stand out as the strategic choice for manufacturers and operators who refuse to compromise on reliability, delivering a robust solution driven by versatility, superior sealing, and global compatibility.
- Technical Details
- Applications
- Dimensions Table (DKO)
- Standards: DIN 2353 (L, S) / ISO 8434-1;
- Outer diameters: 6 mm – 42 mm (metric tubes);
- Maximum operating pressure: 420 bar (6,000 PSI);
- Operating temperature: -40°C to +120°C;
- Body material: carbon steel;
- Surface finish: trivalent zinc plating;
- O-ring: NBR 90 Shore A;
- Certification: ISO 9001.
Agricultural harvesters and sprayers
In articulated boom circuits and hydraulic control systems exposed to constant vibration and uneven terrain, DKO hydraulic adapters maintain stable sealing, help prevent oil contamination of the soil, and reduce corrective maintenance. The dual-sealing design withstands rapid cycles and pressure spikes typical of field maneuvers, preserving system efficiency.
Tractors and soil preparation implements
In cylinders for reversible plows, leveling harrows, and subsoilers, the 24° profile with O-ring provides a robust connection against impacts and cyclic loads, ensuring precise actuation response. Torque repeatability reduces loosening and sustains productivity throughout long working hours.
Dump bodies and road trucks
During the tipping of dump bodies and platforms, DKO connections support safe, continuous operation by maintaining a complete seal throughout repetitive cycles. Their high-torque resistance helps preserve assembly integrity after maintenance and routine inspections in road fleets.
Brush cutters and side sweepers
Exposed to dust, debris, and temperature fluctuations, articulated arm systems benefit from the resilient sealing of the O-ring and tapered seat, reducing micro-leaks and maintaining stable pressure. This extends maintenance intervals and optimizes equipment availability.
Presses and compactors
In machines operating under sustained high pressure, the dual seal prevents gradual fluid losses that compromise force and speed. The result is a more consistent cycle, lower oil consumption, and improved hourly output, especially in continuous industrial operations.
 |
Nominal Sizer |
Tube [mm] |
External Thread (d) [mm] |
Internal Thread (D) [mm] |
|
|
|
Light Series |
Heavy Series |
|
|
|
|
M12x1,5 |
6 |
- |
12 |
10,4 |
|
|
M14x1,5 |
8 |
6 |
14 |
12,4 |
|
|
M16x1,5 |
10 |
8 |
16 |
14,4 |
|
|
M18x1,5 |
12 |
10 |
18 |
16,4 |
|
|
M20x1,5 |
- |
12 |
20 |
18,4 |
|
|
M22x1,5 |
15 |
14 |
22 |
20,4 |
|
|
M24x1,5 |
- |
16 |
24 |
22,4 |
|
|
M26x1,5 |
18 |
- |
26 |
24,4 |
|
|
M30x2 |
22 |
20 |
30 |
27,8 |
|
|
M36x2 |
28 |
25 |
36 |
33,8 |
|
|
M42x2 |
- |
30 |
42 |
39,8 |
|
|
M45x2 |
35 |
- |
45 |
42,8 |
|
|
M52x2 |
45 |
38 |
52 |
49,8 |
|
In general, yes, thanks to the metric and UNF options and the use of adapters when necessary. Check the thread/port pair and the machine pattern.
Fewer microleaks, faster assembly and less rework, which translates into more available machines and lower fluid consumption throughout the life cycle.
DKO (Double Cone O-ring) adapters use a double O-ring sealing system, while traditional JICs have only one sealing cone. The DKO system reduces leaks by up to 98% and offers a useful life 3 times longer, with tolerance to multiple assembly and disassembly without loss of efficiency.
Use PTFE tape if the connection will be retightened periodically. Prefer anaerobic sealant for permanent sealing and greater vibration resistance.
In agricultural hydraulic circuits, sealing failures can halt a harvester during peak harvest season and drive up maintenance costs. The dual-sealing system with O-ring eliminates leaks even under intense vibration and pressure spikes, cutting unplanned downtime and fluid losses by up to 95% when installed per specifications.
The 24° self-centering cone speeds up assembly by up to 40% compared to conventional connections, reducing rework and improving torque repeatability.
Helesul DKO (Double Cone O-ring) hydraulic adapters are engineered for high-reliability sealing in high-pressure hydraulic systems, combining a 24° self-centering cone and O-ring for consistent performance in agricultural machinery and road applications.
With robust construction, they minimize leaks, simplify assembly, and boost equipment uptime even under vibration, intense cycles, and harsh environments.
All Helesul hydraulic adapters are manufactured to ISO, SAE, and DIN standards, ensuring interchangeability, safety, and predictable field performance.
