{"id":5147,"date":"2021-07-01T15:58:45","date_gmt":"2021-07-01T08:58:45","guid":{"rendered":"https:\/\/dbm.com.vn\/product\/two-stage-series-and-parallel-pumps\/"},"modified":"2021-07-01T15:58:45","modified_gmt":"2021-07-01T08:58:45","slug":"two-stage-series-and-parallel-pumps","status":"publish","type":"product","link":"https:\/\/dbm.com.vn\/en\/product\/two-stage-series-and-parallel-pumps\/","title":{"rendered":"Two-Stage (Series and Parallel) Pumps"},"content":{"rendered":"<p><em><span style=\"text-decoration: underline;\">Key features:<\/span><\/em><br \/>\n\u2022 Self-contained, mobile two-stage centrifugal pump test set for a range of tests and demonstrations<br \/>\n\u2022 Pumps have a transparent \u2018window\u2019 to allow students to see clearly the impellers, the water flow and<br \/>\ncavitation<br \/>\n\u2022 Pumps can be tested individually, in series and in parallel, with independent speed control<br \/>\n\u2022 Demonstrates how to use a Venturi meter and differential pressure measurement to find flow rate<br \/>\n\u2022 Optional stroboscope allows students to see clearly the effects of cavitation around a pump impeller<br \/>\n\u2022 Motor drives have digital displays of pump speed, torque and calculated true \u2018shaft\u2019 power<br \/>\n\u2022 Optional easy-to-read analogue instrumentation<br \/>\n\u2022 Works with TecQuipment\u2019s Versatile Data Acquisition System (VDAS\u00ae)<\/p>\n<p><em><span style=\"text-decoration: underline;\">Description:<\/span><\/em><\/p>\n<ul>\n<li>A compact, mobile and fully self-contained centrifugal pump test set, that allows students to find the characteristics of centrifugal pumps working alone or in series or parallel.<\/li>\n<li>It also allows students to see (and hear) cavitation and understand the use of a Venturi meter and differential pressure measurement to find flow rate.<\/li>\n<li>Two bearing-mounted motors drive each pump independently. The pumps draw water from the integral reservoir. The water travels through strainers and a series of valves to be delivered to a Venturi meter. The water then returns to the reservoir for re-use, keeping water use to a minimum.<\/li>\n<li>The pumps each have a transparent \u2018window\u2019 so students can see the impeller turning and how the water vapour bubbles form in the pump at cavitation. The optional stroboscope makes the effect easier to see.<\/li>\n<li>Instrument and control modules fit into a frame above and behind the pumps.<\/li>\n<li>Each pump has an electronic motor drive to control its speed, a load cell to measure torque and a sensor to measure pump speed. A display on each motor drive shows speed and torque and automatically calculates and displays true \u2018shaft\u2019 power.<\/li>\n<li>The differential pressure across the Venturi gives flow rate. Each pump has its own inlet valve. A two-way valve in the system allows the pumps to work alone, in parallel or in series.<\/li>\n<li>TecQuipment supplies a Digital Pressure Display (DP1) as standard, but off ers an optional additional easy-to-read Analogue Pressure Display (AP2). Both instruments display the inlet pressure, delivery pressure and differential<br \/>\npressure across the Venturi. The analogue display is more visual, but the digital display increases ease of measurement, and allows connection to TecQuipment\u2019s frame-mounted Versatile Data Acquisition System (VDAS-F, available separately).<\/li>\n<li>The equipment can use both analogue and digital instrumentation at the same time, allowing students to compare the different pressure measurement methods.<\/li>\n<\/ul>\n<p><em><span style=\"text-decoration: underline;\">Learning outcomes:<\/span><\/em><br \/>\nComprehensive demonstrations and investigations into a<br \/>\ncentrifugal pump including:<\/p>\n<ul>\n<li>Centrifugal pump performance and characteristics, typically head versus fl ow and efficiency versus flow<\/li>\n<li>Non-dimensional performance characteristics<\/li>\n<li>Flow measurement using a Venturi tube<\/li>\n<li>Demonstration of cavitation<\/li>\n<li>Operation of centrifugal pumps in series<\/li>\n<li>Operation of centrifugal pumps in parallel<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Product code: H83<\/p>\n","protected":false},"featured_media":5146,"template":"","meta":[],"product_cat":[29,31,890],"product_tag":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/product\/5147"}],"collection":[{"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/media\/5146"}],"wp:attachment":[{"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/media?parent=5147"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/product_cat?post=5147"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/product_tag?post=5147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}