Factors TO KNOW ABOUT FOUNTAIN PUMPS

出典: くみこみックス

2012年7月1日 (日) 20:53の版

When replacing a fountain pump or selecting a new a single, very first there are some crucial terms to keep in mind:

"Head": This is the maximum vertical lift of the pump. For example, a 6' head means the pump is rated to pump water up to 6 feet high. Note, even so, that at 6 feet the pump would be providing really tiny water, with gallons per hour about zero. So if you require to pump, say, 200 gph at 72", you will possibly want about a 300-600 gallon per hour pump to do the job.

"GPH" : Gallons per hour, generally rated at various heights

"GPM" : Gallons ionways per minute, usually rated at distinct heights

"Pump Curve" : The amount of water volume "curved" according to numerous heights. A 500 gallon per hour pump, for instance, may well pump 500 gallons per hour at " lift, 350 gallons per hour at 24" of lift, and so forth. When buying a pump for the very first time or when seeking a replacement pump, it is essential that you know how several gallons per hour you want to pump and at what height (head).

Water Volume The total volume that you will be pumping is controlled by a few variables. One particular aspect is the size of the pump, as covered above. But you also should contemplate how wide your tubing will be. Tubing is measured in two ways: inside diameter (i.d.) and outside diameter (o.d.). Quite skinny i.d. tubing will greatly lessen water flow. A lot ro machines of buyers are shocked when they locate that, right after hooking up their 500 gallon per hour pump to 1/two" inside diameter tubing, they are only acquiring what they take into account a trickle.

We had an engineer do some calculations for us to illustrate the difficulty. Making use of a 300 gph pump with 1/2" tubing is going to restrict your flow to 253 gallons per hour. By increasing the pump to 450 gallons per hour, but still making use of 1/2" tubing, you will increase volume only slightly, to 264 gallons per hour! The lesson is this: When purchasing a pump, locate out what size of tubing is supposed to go with it. One more issue is operating the tubing too far. Long lengths of tubing develop resistance. If your pump calls for 1/two" i.d. tubing, for instance, but you are running the tubing twenty feet from the pump, it is

a great concept to use three/4" tubing rather so as not to cut down too significantly on flow.

How significantly water do I want? What size of pump? This question is answered in component by no matter whether you want a "trickle" or a roar. When you buy a fountain, you will usually find a recommended flow. For waterfalls, use this as a rule of thumb: for each and every inch of stream width or waterfall "sheet," you will want to deliver 100 gallons per hour at the height you are pumping. So if you are creating a 12" wide waterfall that is 3 feet tall, you require to acquire a pump that will be pumping 1200 gallons per hour at three feet of height. For small ponds, whenever attainable, it is a very good concept to recirculate the water when

an hour, far more frequently if attainable. Therefore, if your pond is 500 gallons, attempt to purchase

a pump that will recirculate water at a rate of 500 gallons per hour. For genuinely

large ponds, this is not required and is far alkaline diet too high-priced.