When one thinks of \u201ctrendy\u201d items, irrigation components don\u2019t pop immediately to mind. Nonetheless, there are some identifiable trends in terms of two major ones: pumps and valves.<\/p>\n
Variable frequency drive in pumps is much more than a trend; it\u2019s the biggest innovation in pump manufacturing in the last 20 years or so, as it\u2019s vastly improved the way irrigation pumps operate. \u201cIn a VFD pump, the power ramps up slowly instead of all at once,\u201d says Calvin Hale, director of education at Gicon Pumps and Equipment, Haltom City, Texas. \u201cThis is a lot easier on a pump\u2019s motor, and as a consequence, they last much longer.\u201d<\/p>\n
There are other benefits to this slow ramp-up trend besides greater pump longevity. \u201cVFD gives you constant pressure, not an up-and-down cycling,\u201d says Hale. \u201cSo, when you\u2019re using matched precipitation nozzles, you get full coverage all the time.\u201d You also get a constant flow.<\/p>\n
\u201cVFD gives you constant pressure at a wide range of flows versus the old style of all-or-none,\u201d says Laremy Kamas, commercial pump station sales manager, south region, for Rain Bird Corporation, Azusa, California. \u201cWith the older style pumps without VFD, you\u2019d have to add pressure regulation devices because of zone flow and pressure changes across a system.<\/p>\n
\u201cFor example, with a constant speed pump, if you were putting out 100 gallons a minute at 70 psi, then turned on a zone so that now you\u2019re putting out 20 gallons a minute, the pump would have more horsepower available to produce more pressure,\u201d says Kamas. \u201cThe result would be misting.\u201d<\/p>\n
The VFD trend does add a bit to the cost of a pump, but few pumps today are sold that don\u2019t include this feature. \u201cWe just discontinued the one non-VFD series we were still selling for light commercial and large estate homes because the control and efficiency are just not there,\u201d says Kamas.<\/p>\n
A VFD can also be retrofitted to an older pump that doesn\u2019t already have it.<\/p>\n
Today, everyone wants to control everything via smartphone, including irrigation contractors and site managers. \u201cFifteen or so years ago, the only type of remote notification you could get would be a page sent by a pump station on a golf course, and all that would say is, something\u2019s wrong, come check it out,\u201d says Kamas. \u201cNow we have technology that lets us log into a pump station remotely from any internet-capable device. You can be notified that a pump is out of commission right away, not five days later when the mowing crew finally comes and sees that thousands of dollars\u2019 worth of landscape material has burned up from lack of water.\u201d<\/p>\n
\u201cRemote monitoring capability also saves a lot of money in labor costs,\u201d says Hale.<\/p>\n
Pumps are more popular than ever before, particularly the horizontal centrifugal type. Bill Rosser, district sales manager at SiteOne Landscape Supply branch in Plano, Texas, has personally observed this trend.<\/p>\n
Plano is a suburb of the Dallas-Fort Worth metroplex, a tech-boom area with a lot of new housing developments. \u201cWe\u2019re seeing a lot of demand for booster pumps here, more frequently today than we did 10 years ago, primarily because of population growth and the increased demand on the municipal water supply to maintain water pressure,\u201d says Rosser. \u201cA pump is often required because the pressure from the mains is not sufficient to operate home irrigation systems.\u201d<\/p>\n
\u201cValves have traditionally been made out of brass,\u201d says Joe Holohan, director of sales at Buckner Superior, Torrance, California. \u201cBut that market is becoming smaller and smaller and has been moving rapidly toward plastic (glass-filled nylon and PVC) in-line valves. When you get outside of the western part of the United States and specifically California, the brass valve market gets considerably smaller.\u201d<\/p>\n
\u201cHowever, there is still a strong market for brass master valves from public agencies and water purveyors,\u201d adds Richard Greenland, technical service manager at Buckner Superior. \u201cThey\u2019re also desired for use in large commercial applications.\u201d<\/p>\n
Brass valves are durable; many that were installed 50 years ago are often found to still be operating. Their decline in popularity is mainly due to the material\u2019s much higher cost. But it\u2019s not as if the newer valve trends lack quality. \u201cHigher-end nylon valves are equal to and, in some cases, better than brass,\u201d says Jeffrey G. Johnson, PE, senior product manager, commercial rotors and valves, Rain Bird, Azusa, California.<\/p>\n
He adds that the choice of brass over nylon or PVC is also a regional preference. \u201cThe majority of brass valves are sold in Southern California, the southwest U.S., and in some rugged-use pockets internationally like the Middle East.\u201d<\/p>\n
Traditionally, valve diaphragms have been made of black rubber. Now, many are being made of ethylene propylene diene monomer, a synthetic rubber. Robb Kowalewski, product manager, valves and micro irrigation at Hunter Industries, San Marcos, California, says the valve trend toward EPDM diaphragms is being spurred by the increasing number of splash pads, padded nonslip surfaces fitted with various nozzles that shower, spray, mist and shoot streams of water being installed in parks and playgrounds as a safer alternative to pools. \u201cThese things use a lot of chlorine, and that chews through black rubber components,\u201d says Kowalewski. \u201cEPDM has chemicals in it that make it much more resilient to chlorine.\u201d<\/p>\n
The increasing use of reclaimed and recycled nonpotable water for irrigation is another reason manufacturers toughened up valve inner components. \u201cReclaimed and recycled water tends to be much higher in chemicals, notably chlorine,\u201d says Johnson. \u201cWe have to make sure the materials that are inside the valves can withstand those chemicals. When you have nonpotable sources, almost any manufacturer will go to using EPDM for the diaphragms.\u201d<\/p>\n
The increased use of reclaimed and recycled water has also brought with it an increased need for filtration, as this water can contain solenoid-clogging dirt, debris and algae. \u201cWe have something at Hunter called Filter Sentry for our ICV valves,\u201d says Kowalewski. \u201cThis works by scouring the filter clean with a wiper that slides up the screen when the valve opens. It continues to scrub the filter\u2019s upper part during valve operation.\u201d<\/p>\n
All the other major valve manufacturers have similar scrubbing devices attached to their filters. These scrubbers sometimes can be added later, after a valve has been installed.<\/p>\n
Learn how new technology improves pumps and valves.<\/p>\n","protected":false},"author":28,"featured_media":2526,"parent":0,"template":"","main-categories":[32,27],"class_list":["post-2512","features","type-features","status-publish","has-post-thumbnail","hentry","main-categories-equipment","main-categories-irrigation"],"yoast_head":"\n