Guillemin Quick Coupling
Guillemin quick couplings are essential components in fluid transfer systems, providing a reliable and efficient means of connecting hoses and pipes. Designed to meet the demands of various industries, Guillemin couplings offer a high level of performance, safety, and versatility.
Guillemin Quick Coupling Supplier from China
The Guillemin coupling — also known as the DSP or French symmetrical coupling — is a symmetric quick-release hose coupling common in Europe and Africa for water, irrigation, petroleum and fire-fighting service.
Because both halves are identical, any two couplings of the same size will mate, which greatly simplifies hose fleet management and emergency connections.
Technical Specifications
| Item | Specification |
|---|---|
| Product Type | Guillemin Symmetrical Coupling (DSP / French Type) |
| Material | Aluminium · Brass · Stainless Steel 304/316 · Galvanized Steel |
| Size Range | ND 20 to ND 100 (3/4" to 4") |
| Connection | Hose tail, BSP / NPT thread, or flange |
| Working Pressure | Up to 16 bar (230 PSI) depending on material |
| Working Temperature | -20°C to +120°C |
| Gasket | NBR, EPDM, Viton or PTFE |
| Standard | EN 14420-8 / NF E 29-572 dimensional interchange |
| Locking | Lever ring with safety latch |
| MOQ | 100 pcs per size |
Key Features
- Symmetrical design — any two couplings of the same size connect, no male/female matching needed.
- Lever ring with safety latch prevents accidental opening under vibration or pressure.
- Aluminium body gives an excellent strength-to-weight ratio for portable hose lines.
- Interchangeable with other EN 14420-8 / NF-compliant Guillemin couplings.
- Replaceable gasket in NBR, EPDM, Viton or PTFE to suit the medium.
- Available with hose tail, threaded or flanged ends for hose-to-hose and hose-to-pipe transitions.
Application Scenarios
- Irrigation: portable water distribution across European and African agricultural schemes.
- Fire fighting: rapid-deployment hose lines for municipal and industrial fire brigades.
- Petroleum & fuel: fuel and oil transfer with Viton or NBR gaskets.
- Water & wastewater: tanker loading, bypass pumping and emergency water supply.
- Industry: cooling water, compressed air and general plant utility lines.
Customization & OEM Service
ShengYa supplies Guillemin (DSP) symmetrical quick couplings to distributors, hose assemblers and OEM equipment builders worldwide. We support full customization:
- Size & specification: non-standard bore, band width or thread pitch built to your drawing.
- Material selection: carbon steel, stainless steel 304/316, brass, aluminium, PP or nylon to match the medium.
- Sealing & gasket: NBR, EPDM, Viton, PTFE or silicone gaskets for chemical, oil or food contact.
- Branding: laser-engraved logo, stamped part number, custom label and retail/wholesale packaging.
- Documentation: material certificate, dimensional report and pressure-test report on request.
Packaging & Delivery
Standard packing is polybag + inner box + export carton, or bulk-packed on request. Typical MOQ is 500 pcs per size for customized orders and 100 pcs for stocked sizes. Lead time is 7–15 days for stock and 20–30 days for customized production. Samples are available for evaluation before bulk order.
Frequently Asked Questions
Why is it called a symmetrical coupling?
Both halves are identical, so you never have to match a male end to a female end. This halves the number of coupling variants you need to stock.
Which gasket should I use for fuel transfer?
NBR is the standard choice for diesel and fuel oil. Viton is recommended for gasoline, higher temperatures or aromatic fuels. Avoid EPDM with petroleum products.
Are these compatible with other Guillemin couplings I already own?
Yes, our couplings are produced to EN 14420-8 / NF E 29-572 dimensions and will mate with other compliant Guillemin couplings of the same nominal diameter.
Do you supply hose tails to match my hose?
Yes. Provide your hose inner diameter and wall thickness and we will supply the matching tail with the correct clamp or ferrule recommendation.
