Customers say the Verderflex hose is the best on the market but what unique features give the Verderflex hose it’s superior hose life ?
- Advanced Hose Construction
- Textured Finish
- Permanent Colour Coding
- Designed to Suit the Application
1 Advanced hose construction
There can be many reasons for a hose to fail but fatigue, or loss of re-enforcement fibres’ elasticity, is the normal reason. For superior hose life it is logical to maximise fatigue strength. Typically, after several million cycles, a hose will fail to restitute (or return to round after being compressed) as the re-enforcing fibres lose their elastic properties (or they fatigue). Pre-failure, this is evident as a gradual reduction in flow per revolution. To have the best hose life, the underlying hose construction must be designed for optimum fatigue strength.
Verderflex’s manufacturing process places up to 3x more nylon reinforcing fibres on a diameter than some other brands. Any hose is subject to a compressive force measured in kilonewtons and by optimising the number of reinforcing fibres, this load is distributed over a greater number of elements, thus reducing the stress per fibre and extending fatigue life.
It’s sounds simple, but the specialist design required is complex and requires a thorough understanding of the hoses’ mechanical stresses and elastomeric properties, skills few apart from Verderflex possess.
A hose is always at the heart of any hose pump and any design advance contributes towards a better pump. A perfect example is the Dura series, the first real advance in hose pump design for many years providing lower energy consumption, more compact footprint and superb hose life.
2 Textured surface improves lubricant distribution for better hose cooling
Many hoses require additional machining for a consistent outer diameter and wall thickness because of manufacturing process limitations. Verderflex’s production process is so precise and well controlled that the exact wall thickness and outer diameter tolerances are maintained at each and every point along the length of every hose.
Without unnecessary secondary machining, the Verderflex hose retains a textured surface. This creates micro-pockets of lubricant and the capillary action results in superior lubrication distribution and better hose cooling resulting in a longer hose life.
Verderflex hoses do not need additional machining.
3 Permanent colour coded material identifier
A secondary benefit of Verderflex’s precise manufacturing production control is the retention of the hose’s surface. This permits a colour coded size and material identification tape to be permanently bonded in the hose during its vulcanisation. These very clear colours eliminate installation errors – one cause of poor hose life is fitting the wrong hose material in a pump, especially where the original material was selected for its chemical resistance.
4 Design for purpose
EPDM is a preferred material for its chemical and thermal resistance. Verderflex EPDM hoses are made with 100% EPDM unlike some manufacturers who use a thin EPDM inner liner bonded to natural rubber. Using a totally homogeneous EPDM hose has the advantages of a higher temperature capability (EPDM melts at a higher temperature than an NR-EPDM junction), no liner mechanical weak point, (there is no inherently weaker, dissimilar rubber junction) and a more substantial amount of chemically resistive material.
All combine to deliver a longer hose life.
The benefits of the superior Verderflex hoses are field proven and many are regularly used in other pumps, replacing original equipment and delivering longer service intervals.