{"id":626,"date":"2007-11-07T11:40:02","date_gmt":"2007-11-07T16:40:02","guid":{"rendered":"http:\/\/www.solinst.com\/onthelevel-news\/?p=626"},"modified":"2017-05-04T15:20:26","modified_gmt":"2017-05-04T19:20:26","slug":"adjusting-pneumatic-pumps-its-easy","status":"publish","type":"post","link":"https:\/\/www.solinst.com\/onthelevel-news\/groundwater-sampling\/low-flow-groundwater-sampling\/adjusting-pneumatic-pumps-its-easy\/","title":{"rendered":"Adjusting Pneumatic Pumps \u2013 It\u2019s Easy!"},"content":{"rendered":"<p>What do you do when your Pneumatic Pump is properly connected, yet there is no sample discharge? A simple &#8216;trick&#8217; is to submerge the sample discharge line into a clear container of water. During the drive cycle you should see bubbles. An aggressive blast of bubbles can mean that there is no water available, while a steady mild bubbling indicates that the pump is operating and sample water is on the way up.<\/p>\n<p>Once sample water is being discharged, you can adjust the flow rate using a pump controller. Make sure that your controller has easy to follow pre-set pumping options, such as the Solinst Electronic Control Units. This helps take the guesswork out of determining suitable drive and vent times for your\u00a0<strong><a style=\"color: #0e2f77; text-decoration: underline;\" href=\"\/products\/groundwater-samplers\/407-bladder-pumps\/index.php\">Bladder Pump<\/a><\/strong>\u00a0or Double Valve Pump.<\/p>\n<p>Determining the amount of applied pumping pressure to retrieve a sample is simple. 1 psi of pressure can raise a 2.3 ft column of water, this is about half of the column height of water in feet, expressed as psi. If a Bladder Pump&#8217;s intake is at 100 ft below ground surface, you will require approximately 50 psi of pressure to get a sample. When sampling with a <strong><a style=\"color: #0e2f77; text-decoration: underline;\" href=\"\/products\/groundwater-samplers\/408-double-valve-pumps\/index.php\">Double Valve Pump<\/a><\/strong>, this calculation is made from ground level to static water level (as a minimum, but can be made from total pump depth to maximize purging rates). Therefore, if a Double Valve Pump is 100 ft below ground surface, and static water level is at 50 ft, you can select a pressure of between 25 and 50 psi. In both cases, add an extra 10 psi to allow for line loss.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What do you do when your Pneumatic Pump is properly connected, yet there is no sample discharge? A simple &#8216;trick&#8217; is to submerge the sample discharge line into a clear container of water. During the drive cycle you should see bubbles. An aggressive blast of bubbles can mean that there is no water available, while&#8230; <span class=\"continue-reading\"><a href=\"https:\/\/www.solinst.com\/onthelevel-news\/groundwater-sampling\/low-flow-groundwater-sampling\/adjusting-pneumatic-pumps-its-easy\/\" style=\"color: #666;\">Continue Reading &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":1121,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[450],"tags":[292,458,462,74],"class_list":["post-626","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-low-flow-groundwater-sampling","tag-groundwater-sampling","tag-408-double-valve-pump","tag-407-bladder-pump","tag-pneumatic-pumps"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Adjusting Pneumatic Pumps - it&#039;s Easy!<\/title>\n<meta name=\"description\" content=\"What do you do when your Pneumatic Pump is properly connected, yet there is no sample discharge?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.solinst.com\/onthelevel-news\/groundwater-sampling\/low-flow-groundwater-sampling\/adjusting-pneumatic-pumps-its-easy\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Adjusting Pneumatic Pumps - 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