Why Choose HYDROTECH?
700 Bar Reliability
Withstand extreme loads without leaks thanks to precision steel hardening and laser valve inspection.
Connect Velocity
Connect and disconnect lines with one hand in 2 seconds. Full system integrity at the moment of switching.
Industry 4.0 Standards
Fully compliant with ISO 16028 and ISO 7241. Interchangeability with Parker, Stucchi, and Faster at the product DNA level.
Certified Products
ISO 16028
ISO 7241-A
DSTU EN ISO
QC Control
Popular QRC Models
ISO A Series (Classic)
Optimal for agricultural machinery and general hydraulic systems.
- Working pressure: up to 350 bar
- Sizes: from 1/4" to 2" (BSP/NPT)
- Material: Carbon steel (Cr3)
- Working temperature: -25°C ... +125°C
- Valve type: poppet
- Seals: NBR (Nitrile)
Flat Face Series
Flat-faced valves. Ideal for excavators and hydraulic breakers: no dirt in the system.
- Pressure: up to 700 bar (pulsating)
- Standard: ISO 16028 (Spill-free)
- Protection: Ni-Zn Zinc plating
- Working temperature: -30°C ... +150°C
- Locking system: safety pin
- Seal material: Viton / Polyurethane
Screw-to-connect QRC
For ultra-high pressure and pulsating loads. Vibration resistant.
- Pressure: up to 700 bar
- Connection: Screw lock (ISO 14541)
- Resistance to water hammer and vibration
- Working temperature: -30°C ... +100°C
- Seal material: NBR / FKM
- Connection under pressure: Yes
HOLMBURY (3/4" ÷ 1") - Screw-lock
Screw-to-connect couplings with butterfly handle for tool-free connection. Power hydraulics.
- Working pressure: up to 350 bar
- Material: Zinc-plated steel
- Seals: NBR (-40°C to +106°C)
- Application: hydraulic oil
- Sizes: 3/4" and 1" BSP
- Standard: HOLMBURY (manufacturer standard)
Holmbury HDB - Decompression Block
Hydraulic multi-coupler for skid steers. Connect all lines simultaneously.
- Working pressure: up to 350 bar
- Sizes: 1/2" and 3/4" BSP
- Coating: Zn-Ni (zinc-nickel)
- Standard: ISO 16028 Flat Face
- Temperature: −40°C ... +106°C (NBR)
- Built-in decompression: Yes
- Application: skid steer interchangeable attachments
Expert Answers
What is the maximum working pressure?
Standard ISO A series couplings are rated for pressures up to 350 bar. Our reinforced Flat Face (ISO 16028) series ensure reliable operation under extreme loads up to 700 bar.
What types of threads are available?
We support all global standards: BSP (parallel pipe), NPT (tapered), and Metric. We can also provide adapters if necessary to match your specific system.
Are your QRCs compatible with global brands?
Yes, our products are fully interchangeable with original Parker, Stucchi, Faster, Dixon, and Inteva couplings according to international ISO specifications.
Trusted by Professionals
"We ordered a large batch for our excavator fleet. The metal quality and valve precision are top-notch. Delivered the very next day."
Andrew Mykolaenko
Technical Director
"Flat Face connections work perfectly. The system stays clean, with no leaks even at maximum pressure. The best alternative to top brands."
Serhiy Bondar
Service Owner
"We selected Flat Face couplings for a hydraulic breaker. The manager consulted us in 10 minutes and chose the correct size. The couplings have been working flawlessly for 3 months."
Oleg Tkachenko
Chief Engineer · Poltava
"We replaced Parker with HYDROTECH - couldn't even tell the difference in operation. Twice the savings. Will order again."
Mykhailo Savchenko
Fleet Manager · Kharkiv
"Documents for accounting were provided promptly: invoice and quality certificates. Very convenient for corporate orders."
Natalia Koval
Procurement Manager · Kyiv
Need Engineer Consultation?
We will help you select QRCs according to your parameters: working pressure, thread type, and operating conditions. Get a professional calculation in 15 minutes.
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Expert Series Comparison
| Performance Parameters | ISO 7241-A (Classic) | ISO 16028 (Flat Face) |
|---|---|---|
| Valve Design | Poppet type | Flat Face (disc) |
| Fluid Loss at Disconnection | ~1.5 - 2.5 ml | 0.01 ml (Anti-drip) |
| Maximum Pressure | up to 350 Bar | up to 700 Bar |
| Operating Temperature | -25°C ... +125°C | -30°C ... +150°C |
| Seal Material | NBR Standard | Viton / Polyurethane |
| Dirt Resistance | Medium (requires caps) | Maximum (Easy Clean) |
| Main Advantage | Price / Versatility | Reliability / Purity |
* All HYDROTECH QRC series are fully interchangeable with Parker, Stucchi, and Faster, confirmed by ISO certificates of compliance.