Holmbury / FIRG QPQ Series

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Holmbury FIRG QPQ Series Couplings are suitable for use in systems operating on mineral oil, water and other mildly corrosive fluids.
They are ideal for applications involving moderately corrosive environments where the cost of stainless steel couplings is prohibitive.

INTRODUCTION
QPQ treatment provides a corrosion resistant finish that is superior to passivated zinc plating and of lower cost than couplings produced entirely from stainless steel. In DIN 50021 salt water spray tests, Tuffride® QPQ surface hardening treatment has proved to have superior corrosion resistance properties than either electrostatic zinc or hard chrome plating. (The term QPQ is derived from Quench-Polish-Quench).
Holmbury flat face couplings have been produced since 1982.
Over the years, extensive experience has been gained in the design, manufacture and application of these products.
Consequently, Holmbury couplings have won design innovation awards and are widely regarded as the World’s leading brand of flat face coupling.

Tuffride® is a registered trademark of Degussa AG.

ADVANTAGES

• Flat faces can easily be wiped clean before connection to prevent the ingress of contaminants into the circuit.
• Clean disconnection - non-spill design.
• No air intrusion during connection.
• Streamlined flow path minimizes pressure drop.
• Locking sleeve prevents accidental disconnection.
• Bi-directional flow

MATERIALS
FIRG QPQ Series Couplings have QPQ treated carbon steel bodies with stainless steel and brass internal components. Seal materials are Viton and PTFE.