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HFB, HFS, HFC Series
Download DatasheetFree flow, valveless pressure washer couplings
Holmbury’s HFB Series brass couplings are able to accommodate high flow rates and minimal pressure drops. The couplings are valveless, hence when disconnected any fluid in the system can escape. Suitable for non-hazardous fluids only.
High Flow
Speciality Coupling
Features
- Valveless design allows for high flow rates and minimal pressure drop characteristics
- Bidirectional flow
Accessories
- Seal kits are available for the HFB Series
Construction
Brass body
Fitted with Nitrile seals
Available in carbon steel (HFC) and stainless steel (HFS) on request
Fitted with Nitrile seals
Available in carbon steel (HFC) and stainless steel (HFS) on request
Applications
- Designed for use in pressure washer systems and systems containing non-hazardous fluids
- Carpet cleaners
- Steam cleaners
- Coolant lines
- Any non-valved application
AVAILABLE SEALS AND TEMPERATURE RANGE
All carbon steel products have Nitrile Butadiene Rubber seals fitted as standard. All stainless steel products have Fluoro-elastomer Rubber (Viton®) seals fitted as standard. Special seal materials available on request.
0°
Nitrile
EPDM
Viton®
Kalrez®
0°
Viton®
Kalrez®
Nitrile
EPDM
| Abbreviation | Trade Name | Chemical Name | Min Temp. | Max Temp. |
| NBR XNBR | Chemigum®, Hycar8, Breon®, Butakon®, Butacril®, Buna-N®, Perbunan®, Paracril®, Krynac®, Europrene-N®, Nipol® | Nitrile Butadiene Rubber Carboxylated Nitrile Rubber | -40°C (-40°F) | 106°C (223°F) |
| FKM (FPM) | Dai-el®, Fluorel®, Tecnoflon®, Viton® | Fluoro-elastomer Rubber | -20°C (-4°F) | 200°C (392°F) |
| EPR EPDM | Buna-AP®, Dufral®, Epsyn®, Nordel®, Epcar8, Keltan®, Royalene®, Polysar-EPDM® | Ethylene Propylene Copolymer Ethylene Propylene Terpolymer | -50°C (-58°F) | 120°C (248°F) |
| FVMQ | Silastic 1S®, FSE® | Fluorosilicone Rubber | -65°C (-85°F) | 170°C (338°F) |
| FFKM | Perlast®, Kalrez®, Chemraz®, Kaflon® | Perfluoroelastomer | -25°C (-13°F) | 300°C (572°F) |