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.
November 23, 2012
