turndown ratio in metering pump

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  • What is a turndown ratio in metering pumps? -

    2021-4-2 · Turndown is the ratio of a metering pump’s output. For example, if a pump has a turndown ratio of 1000:1, that means it should be able to move anywhere from 1,000 GPH or 1 GPH within the same accuracy rating. It allows the user to adjust for changing operating conditions or production rates in a seamless manner, without ever losing the ...

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  • How to Evaluate a Metering Pump’s Turndown

    2013-2-10 · A turndown ratio of 10:1 for a metering pump is pretty common, it means the pump will cover a range from 1 unit/time to 10 units/time. As long as your requirements fall within the pump's minimum and maximum capacity limits it will do what you want it to do (assuming it will also develop the pressure you need, handle the viscosity, meet NPSHA, etc).

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  • turndown ratio metering pump - Pump engineering -

    2021-4-30 · Turndown is an important specification that defines a metering pump’s output. What is Turndown? Turndown is expressed as a ratio of a pump’s output. If a metering pump is capable of 1,000 GPH maximum and it has a 1000:1 turndown ratio, then it can be adjusted to a flow rate as low as 1 GPH and it should still be

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  • Criteria for Evaluating a Metering Pump’s Turndown with ...

    2016-6-2 · Turndown is expressed as a ratio of the metering pump output. If a pump is capable of a maximum of 1,000 gallons per hour (gph) and it has a 100-to-1 turndown ratio, then it can be adjusted to a flow rate as low as 10 gph and still perform within its accuracy rating. But a turndown ratio means little without an accuracy rating as well.

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  • Why Turndown Is a Vital Part of Metering Pump

    2017-5-11 · What is a turndown ratio? A turndown ratio is the rated capacity of a pump divided by (compared to) the minimum capacity that can be obtained while also maintaining a specified steady state accuracy, flow, repeatability and linearity. What is a typical turndown ratio? For most metering applications, 10:1 is the typical turndown requirement.

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  • Metering Pumps Need Turndown for Efficiency -

    2019-2-12 · Turndown is expressed as a ratio of the me-tering pump output. If a pump is capable of a maximum of 1,000 gallons per hour (gph) and it has a 100-to-1 turndown ratio, then it can be adjusted to a flow rate as low as 10 gph and still perform within its accuracy rating. Turndown & Accuracy Over the years, different metering pump manufacturers ...

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  • Turndown Ratios - PROMINENT WATER

    2011-12-17 · Most metering pumps have a turndown ratio of 10:1, which means that the pump is within its accuracy rating anywhere between 10 percent and 100 percent of capacity. New generation metering pumps have been introduced that feature higher accuracy, and a greater turndown ratio of 100:1.

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  • Why Turndown Is a Vital Part of Metering Pump Efficiency

    2020-2-21 · metering pump with a maximum capacity of 114 GPH (432 l/h) and a maximum pressure of 225 PSI (15 bar). This expanded output range makes LK a perfect complement to the E Series metering pump line. LKN pumps are ideal for larger chemical feed applications in a wide range of fields, including water treatment, chemical process, agriculture,

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  • These metering pumps feature a very large turndown

    2020-5-1 · The pump offers a smooth chemical feed without risk that it will overheat or lose its prime. Furthermore, the pumps do not require continuous maintenance and do not include any check valves that could potentially clog. A large turndown ratio (1,000:1) allows users to standardize on one pump for all chemical-feed applications.

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  • Criteria for Evaluating a Metering Pump’s Turndown with ...

    2021-4-30 · Turndown is an important specification that defines a metering pump’s output. What is Turndown? Turndown is expressed as a ratio of a pump’s output. If a metering pump is capable of 1,000 GPH maximum and it has a 1000:1 turndown ratio, then it can be adjusted to a flow rate as low as 1 GPH and it should still be

    Get Price
  • Minimum Flow Rate for Gear Pumps - Liquiflo

    2016-2-4 · Turndown Ratio of a Gear Pump A gear pump is an excellent choice for metering fluids. Often times the pump is called upon to meter a range of flow rates. The ratio of this range (maximum flow divided by minimum flow) is called the turndown ratio or simply, the turndown. For example, the range of 10 GPM to 1 GPM would be a turndown of 10:1.

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  • Metering pumps - Pump Industry Magazine

    Most metering pumps have a turndown ratio of 10:1 which simply means that the pump is within its accuracy rating anywhere between ten per cent and 100 per cent of capacity. Some newer designs of metering pumps feature higher accuracy, and a greater turndown ratio of 100:1.

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  • Metering Pumps - Walchem

    2020-2-25 · control and a turndown ratio of 360:1 make this series an exceptional value. The pumps are simple to operate with only three pushbutton keys and the unmatched turndown ratio provides both versatility and high resolution chemical feed which eliminates slug-feeding effects. PUMP SERIES EZ = Electronic metering pump with manual speed control

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  • Sizing and Selecting Metering Pumps

    2019-10-10 · Metering pumps with micrometer dials may also feature a variable speed drive that allows adjustment of the pump’s . stroke speed. Using the two in unison can allow additional adjustability or turndown capabilities over the range of the drive, depending on the pump’s stroking speed. For example, a pump operating at 75 strokes per minute

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  • Metering Pump Technology

    2021-3-30 · ratio of 10:1, which simply means that the pump is within its accuracy rating anywhere between 10% and 100% of capacity. Centrac is an example of a new generation metering pump that features higher accuracy, and a greater turndown ratio of 100:1. Therefore, this design will accurately dose anywhere between 1% and 100% of capacity. Metering Pump ...

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  • Chemical Metering Pumps | LMI Pumps

    Although a metering pump can generally be adjusted to pump at any flow rate between 0 and its maximum capacity, its accuracy is measured over a range determined by the pump's turndown ratio. Today’s hydraulically actuated metering pumps have a turndown ratio of 1,000-1, which means the pump will accurately dose chemicals anywhere between .1% ...

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  • Metering Pumps - Walchem

    2020-2-21 · metering pump with a maximum capacity of 114 GPH (432 l/h) and a maximum pressure of 225 PSI (15 bar). This expanded output range makes LK a perfect complement to the E Series metering pump line. LKN pumps are ideal for larger chemical feed applications in a wide range of fields, including water treatment, chemical process, agriculture,

    Get Price
  • EZ Pumps | GTP Inc.

    2021-3-4 · Advanced microprocessor control and a turndown ratio of 360:1 make this series an exceptional value. ... High Compression Ratio The compression ratio of a metering pump is important because it affects the pump’s ability to prime and vent. The compression ratio is raised when you reduce the dead volume of the pump head during operation ...

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  • Centrifugal pump turndown ratio — with over 130

    Although a metering pump can generally be adjusted to pump at any flow rate between 0 and its maximum capacity, its accuracy is measured over a range determined by the pump's turndown ratio. Today's hydraulically actuated metering pumps have a turndown ratio of 1,000-1, which means the pump will accurately dose chemicals anywhere between .1%.

    Get Price
  • Why Turndown Is a Vital Part of Metering Pump Efficiency

    2019-2-12 · Turndown is expressed as a ratio of the me-tering pump output. If a pump is capable of a maximum of 1,000 gallons per hour (gph) and it has a 100-to-1 turndown ratio, then it can be adjusted to a flow rate as low as 10 gph and still perform within its accuracy rating. Turndown & Accuracy Over the years, different metering pump manufacturers ...

    Get Price
  • Sizing and Selecting Metering Pumps

    2019-10-10 · Metering pumps with micrometer dials may also feature a variable speed drive that allows adjustment of the pump’s . stroke speed. Using the two in unison can allow additional adjustability or turndown capabilities over the range of the drive, depending on the pump’s stroking speed. For example, a pump operating at 75 strokes per minute

    Get Price
  • Sizing and Selecting the Proper Metering Pump -

    2019-4-9 · Metering pumps that use a variable speed drive will deliver a turndown ratio that is determined by dividing the pump’s stroke speed by its minimum operating speed. A variable speed drive will enable the pump to inject a dose of the same size on each stroke, but since the stroke speeds will change, the doses themselves will be less frequent.

    Get Price
  • Metering Pumps - Les Plastiques Cy-Bo inc.

    2018-7-10 · The compression ratio of a metering pump is important because it affects the pump’s ability to prime and vent. The compression ratio is improved when you reduce the dead volume of the pump head during operation. All E Series pumps feature a very high compression ratio that ensures proper feed, especially with off-gassing products.

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  • Digital Technologies Advance Performance of

    2006-9-1 · Hibbert was most excited about the high turndown ratio the digital pump offered. The utility sees a huge variation in stream flow and turbidity throughout the year, and their need for treatment chemicals varies widely. In the past they have needed two different sizes of solenoid metering pumps to meet the treatment chemical flow range.

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  • Solenoid Metering Pumps - Quantrol

    SEKO Metering Pumps Solenoid Metering Pumps Tekna Series Pump Features • 4 Models cover an output range of 0.1 to 29 GPH with pressure ratings up to 290 PSI. • Turndown ratio 100:1 using the manual stroke rate control. • Choice of Analog or Digital controls. • Installation flexibility with both wall mount and surface mount brackets ...

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  • Walchem Metering Pumps Brochure - valin.com

    2017-7-14 · High Compression Ratio The compression ratio of a metering pump is important because it affects the pump’s ability to prime and vent. The compression ratio is improved when you reduce the dead volume of the pump head during operation. All E Series pumps feature a very high compression ratio that ensures proper feed, especially with

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  • Grundfos Metering | Design Controls

    The DDA model is the pump for complex and demanding applications where the focus is on maximum process reliability. In addition to an extended capacity range and a turn-down ratio of up to 1:3000, it boasts patented sensor technology to …

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  • Delta | ProMinent Fluid Controls, Inc.

    2019-8-20 · The delta® is a solenoid driven, diaphragm metering pump. It covers a feed range from 2.0 gph at 363 psi (8 l/h at 25 bar) to 20 gph at 29 psi (75 l/h at 2 bar). Due to its wide adjustment range – both the stroke length and the stroke rate can be varied – this output range is covered by seven different pump sizes.

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  • What does turndown ratio mean? - Mass Flow ONLINE

    Turndown Ratio = maximum flow minimum flow. For example, if a given flow meter has a 50:1 turndown ratio the flow meter is capable of accurately measuring down to 1/50 th of the maximum flow. So, suppose a flow meter has a full scale rating of 20 l/min the flow meter will measure down to …

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  • Sizing and Selecting the Proper Metering Pump -

    2019-4-9 · Metering pumps that use a variable speed drive will deliver a turndown ratio that is determined by dividing the pump’s stroke speed by its minimum operating speed. A variable speed drive will enable the pump to inject a dose of the same size on each stroke, but since the stroke speeds will change, the doses themselves will be less frequent.

    Get Price
  • Metering Pumps – Madden Pump

    Repetitive accuracy of +/- 1% over a 10:1 turndown ratio is achieved with the stroke adjustment knob located conveniently on the top of the pump. Metering Pumps – Long Service Life, Low Maintenance. The simple mechanically actuated diaphragm design eliminates pesky hydraulic systems and packing glands used in many metering pumps.

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  • Peristaltic Pumps: A Simple Solution for Abrasive and ...

    2011-12-15 · a single peristaltic pump can cover. The “turndown ratio” or “flow range” of a peristaltic pump is unparalleled. A high quality perista pump is capable of over 2000:1 flow range (max flow to min flow) by simply controlling one parameter: the rotor speed. With the added versatility of putting different tube sizes into one

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  • Solenoid Metering Pumps - Quantrol

    SEKO Metering Pumps Solenoid Metering Pumps Tekna Series Pump Features • 4 Models cover an output range of 0.1 to 29 GPH with pressure ratings up to 290 PSI. • Turndown ratio 100:1 using the manual stroke rate control. • Choice of Analog or Digital controls. • Installation flexibility with both wall mount and surface mount brackets ...

    Get Price
  • Metering Pumps - Walchem - PDF Catalogs | Technical ...

    Advanced Pump Technology Walchem and Iwaki joined forces to develop the most innovative and comprehensive metering pump product line in the world. Iwaki metering pumps are designed for a broad range of applications, and are manufactured to the highest quality standards that exceed even the toughest customer expectations.

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  • How to Size and - Dover Corporation

    2017-5-12 · Metering pumps that use a variable speed drive will deliver a turndown ratio that is determined by dividing the pump’s stroke speed by its minimum operating speed. A variable speed drive will enable the pump to inject a dose of the same size on each stroke, but since the stroke speeds will change, the doses themselves will be less frequent.

    Get Price
  • Series C Chemical Metering Pumps | LMI Pumps

    Its 100% enclosed, chemically-resistance housing makes this pump ideal for the harshest chemical dosing; The Series C offers a wide selection of options and features, making it easy to tailor this pump to your specific application needs. Standard Features. Adjustable stroke frequency and the flexibility of up to 1000:1 turndown ratio

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  • Walchem's EZ Series Metering Pumps Compact Size

    2016-12-2 · EZ Series electronic metering pumps offer precise chemical injection at a low cost. The compact size and simple control make them ideal for water treatment and OEM applications. EZ Series have outputs to 6.3 GPH (24 l/h) and a maximum pressure of 150 PSI ( 10 bar).

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  • LMI Pumps - Hawkins

    2021-5-12 · The EXCEL® XR Metering Pump. The EXCEL® XR metering pump is a mechanically actuated diaphragm pump driven by advanced variable speed technology to provide the most accurate and reliable performance in the industry.This proven technology is easy to maintain and will provide years of maximum up-time service.

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  • How to Size and - Dover Corporation

    2017-5-12 · Metering pumps that use a variable speed drive will deliver a turndown ratio that is determined by dividing the pump’s stroke speed by its minimum operating speed. A variable speed drive will enable the pump to inject a dose of the same size on each stroke, but since the stroke speeds will change, the doses themselves will be less frequent.

    Get Price
  • P100 Metering Pumps

    2021-4-13 · If you incorporate a programmable pump controller (variable frequency drive; 'VFD') you can maintain metering accuracy within a 10:1 turndown ratio. The P100 Hydra-Cell pump is a standard model F20 Hydra-Cell pump with the addition of the gearbox. We add the gearbox to reduce the shaft torque required for lower RPM (flow rate) performance ...

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  • Ordering Metering Pumps Information

    2015-10-29 · control and a turndown ratio of 360:1 make this series an exceptional value. The pumps are simple to operate with only three pushbutton keys and the unmatched turndown ratio provides both versatility and high resolution chemical feed which eliminates slug-feeding effects. PUMP SERIES EZ = Electronic metering pump with manual speed control

    Get Price
  • Solenoid Metering Pumps - Quantrol

    SEKO Metering Pumps Solenoid Metering Pumps Tekna Series Pump Features • 4 Models cover an output range of 0.1 to 29 GPH with pressure ratings up to 290 PSI. • Turndown ratio 100:1 using the manual stroke rate control. • Choice of Analog or Digital controls. • Installation flexibility with both wall mount and surface mount brackets ...

    Get Price
  • Metering Pumps - Les Plastiques Cy-Bo inc.

    2018-7-10 · The compression ratio of a metering pump is important because it affects the pump’s ability to prime and vent. The compression ratio is improved when you reduce the dead volume of the pump head during operation. All E Series pumps feature a very high compression ratio that ensures proper feed, especially with off-gassing products.

    Get Price
  • Walchem Diaphragm Metering Pump IX-B015TCT-U

    High resolution motor control adjusts the discharge and suction speeds to meet a full and accurate turndown ratio of 1000:1 and flowrates from 300 L/H down to 7.5 mL/H. ±1% High Accuracy Combined with precise motor control, an efficient valve design maintains accurate flow rates to allow a low-cost, mechanically-driven diaphragm pump to ...

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  • Stenner peristaltic metering pumps Econ LD low

    The Econ LD is a precise, compact, variable speed, peristaltic pump designed for reliably metering low volume amounts. The quiet, long lasting brushless motor, in a totally enclosed housing, offers premium quality at an economical price.

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  • Dosing Pump - Mechanical Diaphragm Pump

    Steady State Accuracy Of +/-2.5% Of Stroke, Turndown Ratio-10:1; Repeatability +/-2.5%; Inbuilt Pressure Relief Value & Vaccum Valve Safeguards The Pump. Double Diaphragm With Diaphragm Rapture Indication (RIA) Is Also Avialable For All Standard Models. Performance Conforms To API 675 Standards. Material of construction of wet-end part

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  • SOLENOID METERING PUMPS - pulsatron.salesmrc.com

    2018-10-22 · metering pump technology. Technology is the key to delivering responsible products to the markets that we serve. Leading the way in the development of metering technologies, Pulsafeeder continues to set the standard for accuracy, reliability and safety. Helping customers find a new approach to an old problem is what we do best.

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  • BLACKLINE SERIES MD - pulsatron.salesmrc.com

    2020-2-11 · Nine distinct models are available, having flow capabilities to 132 GPH (500 LPH) and pressures to 150 PSI (10 BAR), with a standard turndown ratio of 10:1 or up to 100:1 with the optional VFD Vector Drive. Metering performance is reproducible to within ± 2% of maximum capacity. FEATURES • Liquid end materials - GFPPL, 316 SS, & PVDF

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