When Pressure Is High, Trust the Threaded Quick Coupling That Holds Its Ground
Let’s be honest—working with high‑pressure hydraulics isn’t for the faint of heart. One wrong connection, one weak link, and you’re looking at downtime, safety risks, and a mess you don’t want to clean up. If you’ve ever had a coupler blow out under pressure or struggled to connect lines that still had residual force, you know exactly what I mean.
That’s exactly why we developed the VEP Series Threaded Quick Coupling here at HL FLUID. After 15 years in the game, we know that when the pressure hits hard, your equipment needs to hit back harder.

Built to Take the Punch
What sets the Threaded Hydraulic Quick Couplings apart? Start with the valve. We’ve engineered a new valve design that stands up to high flow and the constant hammering of pressure impulses. It’s not just about handling the pressure—it’s about handling it over and over, without wearing out.
And then there’s the connection itself. The special nipple design allows you to connect and disconnect even when there’s high residual pressure in the lines. No more fighting against the system or waiting for pressure to bleed down. That’s a game‑changer on equipment like excavators, drilling machines, and cranes where every minute counts.
Threaded Security, Flat‑Face Cleanliness
The VEP series uses a threaded sleeve locking mechanism—you manually thread the two halves together, creating a connection that won’t vibrate loose. This Threaded Connection Coupling gives you the peace of mind that your lines stay put, even under the roughest conditions.
| Materials | zn/zn-ni plated carbon steel body |
| Seals | standard in nitrile NBR. On request FKM&EPDM seals |
| Back-up ring | PTFE |
| Working temp | with standard seals -25°+125° |


But we didn’t stop at strength. When you connect or disconnect, the valves mate together (flush valving), so you lose barely a drop of fluid and keep air out of the system. That means less mess, less contamination, and longer life for your components.
We’ve also given the whole thing a new chrome plating treatment that laughs at rust. And inside, the Anti‑Blowout BFT bonded seal is there to prevent blow‑outs or seal damage when things get really severe. Every coupler is machined from solid steel barstock—no shortcuts, just durability you can feel.
| HL | ISO | L1 | L2 | L3 | D | S1 | S2 | S3 | T | COD(F) | COD(M) |
| 04 | 12.5 | 138.8 | 70.8 | 85 | 41.8 | 38 | 30 | 27 | 1/2’’BSP | VEP-04F-BSP | VEP-04M-BSP |
| 06 | 20 | 164 | 84.5 | 97.4 | 49.8 | 46 | 36 | 36 | 3/4’’BSP | VEP-06F-BSP | VEP-06M-BSP |
| 08 | 25 | 190.5 | 99.7 | 113.6 | 53.8 | 55 | 46 | 46 | 1’’BSP | VEP-08F-BSP | VEP-08M-BSP |
| 10 | 31.5 | 206.2 | 106.8 | 123.4 | 69.8 | 65 | 55 | 55 | 1-1/4’’BSP | VEP-10F-BSP | VEP-10M-BSP |
| 12 | 40 | 253.9 | 133.5 | 150 | 92 | 85 | 65 | 65 | 1-1/2’’BSP | VEP-12F-BSP | VEP-12M-BSP |
| 16 | 50 | 383.5 | 224.8 | 218.4 | 200 | 85 | 90 | 90 | 2’’BSP | VEP-16F-BSP | VEP-16M-BSP |
| Nominal Size | Max.Working Pressure | Rated flow | Max flow rate | Min.Burst Pressure | Fluid Spillage | |||
| Male | Female | Coupled | ||||||
| HL | ISO | (bar) | (l/m) | (l/m) | (bar) | (bar) | (bar) | (cc) |
| 04 | 12.5 | 550 | 45 | 90 | 1400 | 1000 | 2400 | 0.12 |
| 06 | 20 | 550 | 76 | 150 | 1400 | 1000 | 1400 | 0.15 |
| 08 | 25 | 500 | 100 | 200 | 1250 | 1000 | 1250 | 0.02 |
| 10 | 31.5 | 470 | 189 | 280 | 1200 | 800 | 1200 | 0.03 |
| 12 | 40 | 400 | 379 | 700 | 1100 | 800 | 1100 | 0.05 |
| 16 | 50 | 350 | 758 | 1000 | 1100 | 800 | 1100 | 0.1 |
Where You’ll Find Them
If you’re working in high‑pressure environments, this is your coupling. Think:
Excavators and heavy construction gear
Oil field equipment and well head drives
Drilling machines and cranes
Any machinery that demands reliable High Pressure Threaded Hydraulic Quick Couplings
And yes—our VEP series is fully compatible with STUCCHI VEP Series, so if you’re already in that ecosystem, you can swap without a second thought.
More Than a Component
At HL FLUID, we don’t just manufacture Quick Couplings—we craft the connections that power industries worldwide. Founded in 2010, we’ve spent over 15 years designing, developing, and producing high‑performance couplings that engineers trust from construction sites to offshore platforms.
If your operation runs on high pressure, don’t leave the connection to chance. Check out our Threaded Quick Coupling lineup and see what a difference real engineering makes.










