Wafer Style Axial Flow Check Valves vs. Dual Disc Check Valves

[freemexy]

Wafer Style Axial Flow Check Valves vs. Dual Disc Check Valves
n 2000 a South Eastern US County Water Department, located in one of the fastest growing areas in the US, began operation of their wastewater treatment facility. Upon completion in 2006, the membrane plant was operating at a licensed 60 million gallons per day (mgd) capacity with an average of 30 mgd since completion. In 2010 the plant began having issues with water hammering and began reviewing alternatives to the existing design in an effort to resolve the issue. axial check valve

The membrane plant at the wastewater treatment facility in question was operating at the following capacity: Membranes treat plate clarifier effluent and are designed to treat 40 mgd. Membranes effluent then goes through three more processes before it is returned to a lake or river.

The reinforced hollow-fiber membrane acts as a physical barrier, producing the highest quality effluent. In addition, the system’s modular design allows membranes to be added as the capacity requirement increases, drastically reducing upfront development costs. 

The membrane plant utilizes a combination of 20 pumps with associated check valve protection to provide membrane filtration, backwash pulse and clean water discharge for the site. Starting around 2010 the plant started having issues with water hammering, which resulted in the following:
Check valve spring failure every 2-3 months.Repair and replacement of check valve every 3-4 months.