Straight Female Swivel DKO Connection – Light Series
This is where Helesul DKO (Double Cone O-ring) hydraulic adapters stand out as the strategic choice for manufacturers and operators who demand uncompromising reliability, offering a robust solution built on versatility, superior sealing, and global compatibility.
- Technical Details
- Applications
- Size Chart (DKO)
- Standards met: 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.
Harvesters and agricultural sprayers
In articulated boom circuits and hydraulic controls exposed to constant vibration and uneven terrain, DKO hydraulic adapters maintain stable sealing, mitigate soil contamination from oil, and reduce corrective interventions. The dual sealing tolerates rapid cycles and pressure spikes typical of field maneuvers, preserving system efficiency.
Tractors and tillage implements
In the cylinders of reversible plows, leveling harrows, and subsoilers, the 24° profile with O-ring offers a robust connection against impacts and cyclical loads, ensuring precise actuation responses. Torque repeatability decreases loosening and sustains productivity during prolonged work shifts.
Dump trucks and highway trucks
During the tipping of dump bodies and platforms, DKO connections contribute to safe and continuous operation, maintaining total sealing throughout repetitive cycles. High torque resistance helps preserve the assembly's integrity after periodic maintenance and inspections in road fleets.
Brush cutters and side sweepers
Exposed to dust, debris, and thermal variations, articulated arm systems benefit from the resilient sealing of the O-ring and conical seat, reducing micro-leaks and maintaining stable pressure. This extends maintenance intervals and optimizes equipment uptime.
Presses and compactors
In machinery subjected to constant high pressure, the dual sealing prevents progressive fluid loss that degrades force and speed. The result is a more consistent cycle, lower oil consumption, and higher hourly yield, especially in continuous industrial operations.
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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 agricultural hydraulic circuits, sealing failures can bring a harvester to a halt during peak harvest and generate high maintenance costs. The dual sealing system with O-ring helps eliminate leaks even under intense vibration and pressure spikes, reducing unplanned downtime and fluid loss by up to 95% when installed according to specifications.
The self-centering 24° cone speeds up assembly by up to 40% compared to conventional connections, reduces rework, and improves torque repeatability.
Helesul DKO (Double Cone O-ring) hydraulic adapters are engineered for high-reliability sealing in high-pressure hydraulic systems, combining a self-centering 24° cone and O-ring for consistent performance in agricultural machinery and road applications.
With a robust construction, they reduce leaks, simplify assembly, and increase equipment uptime even under vibration, heavy-duty cycles, and harsh environments.
All Helesul hydraulic adapters are manufactured in accordance with ISO, SAE, and DIN standards, ensuring interchangeability, safety, and predictable performance in the field.

