Industrial Testing of Desiccant Bags & Cartridges
Flow Dry has the capability to test pressure drop, seam strength, vibration, permeability and loss on ignition (LOI) on all its desiccant products to ensure premier quality and reliability.
Pressure Drop Testing of Desiccant
Pressure drop testing is used to determine the amount of fluid flow restriction a receiver dryer or accumulator design creates. Less restrictive designs have the potential to create a higher performance a/c system. The desiccant package contained inside the receiver dryer or accumulator can create a restriction in the system and therefore increase the pressure drop of the system. Because pressure drop is a critical design requirement, Flow Dry utilizes a pressure drop tests to aid in designing the highest performance desiccant packages on the market.
Crush Force Testing
The wide range of applications for our desiccant beads means that they may be subjected to great compression forces. Our desiccant beads are tested to a very high standard to ensure they resist fracture and fail during transit and application.
Desiccant Bag Permeability Testing
The physical properties of the material used to fabricate desiccant bags are critical to insure proper performance. The permeability of the bag material must be balanced to allow the desiccant exposure to the refrigerant, while at the same time containing any attrition of desiccant particles inside the bag. Because of its low cost and permeability properties, polyester felts have become the standard materials of construction for most a/c desiccant bags. Some desiccant bag fabricators form or stretch the bag material in the process of manufacturing; this distortion can weaken the material and change its permeability properties. Flow Dry fabricates its desiccant bags without stretching or forming the bag material to insure that the proper permeability rating is maintained. Extensive permeability testing is performed to insure all bags have the proper permeability rating.
Vibration testing is used to determine if a desiccant package is designed to withstand the punishment it will be subjected to in a vehicle. If the desiccant package is not designed properly it could be damaged or cause damage to other components in the system. Flow Dry has the capability to test desiccant packages as installed in receiver dryers and accumulators to insure long life without premature failure.
Loss on Ignition (LOI) Water Adsorbtion Testing
The industry standard test to measure the amount of water that has been adsorbed by the desiccant is the Loss on Ignition test. To perform this test the desiccant must be heated for a specified period of time to bake out the water. The difference in the desiccant weight before and after heating is the amount of water the desiccant contained. LOI testing is performed on all incoming desiccant material; in-process packaging and outgoing product to insure the moisture content is maintained at specified levels.
Desiccant Package Seam Strength
Along with vibration testing, seam strength testing is critical to insure structural integrity of the desiccant package. An automated pull tester checks the strength of package welds. SPC data of the seam strengths is recorded and monitored to insure proper process control.
Attrition Resistant Design for Automotive Applications
The Flow-Dry desiccant bag design and manufacturing process retains the highest material integrity and does NOT "stretch" or "deform" the felt material. The Flow-Dry process results in a bag with greater filtering capability and NO "pin-holes" in the material. These holes have led to desiccant and particulate escaping from competitors' bags and causing damage to a/c systems.