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As a contributing member of the Hydraulic Institute and an experienced water system engineer I feel I can recommend the best class of pumps under 50 GPM and the sources for finding them. First of all, you need to evaluate the required head; an application with less than around 100' TDH is...

In all of my limited experience I have never seen any type of timer connected to a pilot controlled hydraulic control valve, such as a Cla-Val model 52-03 surge anticipator valve. I do know the valves you are talking about, but that type of valve is not the style I am referring to. I don't...

The determination of loss of filter media involves consideration of the upflow rate in GPM/ft2, head differential (if any), freeboard, and the specific gravity and surface cohesion of the filter media. Consultation with the manufacturer of the filter media will provide the information you seek...

The kinetic term in a kinetic air valve simply refers to the valve's ability to vent air under kinetic flow conditions i.e. during filling of the pipeline or during dynamic flow conditions. Since many air release valves have a tendency to close during pipeline filling due to a buildup of air...

BobPE; The surge anticipator valve I refer to is the pilot controlled over hydraulically main style as made by Cla-Val, OCV, Ross, etc. Their pilot control system is designed to allow the main valve to begin to open during the initial low pressure wave that accompanies power failure of a pump or...

The surge anticipator valves (surge relief) are indeed high maintenance valves due to the multiple pilots and complex piping. A surge anticipator valve normally will include: 1- high pressure pilot, 1- low pressure pilot, 1- flow limiter (to restrict amount of main valve opening), 1- control...

Sizing an overflow pipe is totally dependent on the size and length of pipe and fittings, available head, inlet conditions, and outlet conditions. I have found that the inlet conditions are critical to success, if you assume that it is no more than a sharp crested weir, I feel that you will be...

Removal of iron and/or manganese from groundwater is a tricky and sometimes difficult thing to accomplish, especially if manganese is the primary element. If the iron level is the only problem, you can use several methods; including: oxidation/reduction/filtration (chlorination or KMnO4 used as...

There are numerous manufacturers of control valves; including: Cla-Val Compnay, Newport Beach, CA., Golden Anderson Co., Mars, PA., Ross Valve, Troy, NY, and Bermad Company, Anaheim, CA. All of these companies manufacturer surge and pressure relief valves. It is imperative that you understand...