How do you change the stroke length on a dosing pump

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  • Dosing Pump - an overview | ScienceDirect Topics

    However, it is still common to control a piston diaphragm pump’s motor speed with a 4–20 mA signal from a flowmeter in the stream to be dosed.This is known as flow pacing, and when used in conjunction with stroke length control as described in the next section, it can give very accurate (±0.1 pH units) pH control.. However, some engineers use simple speed control proportional to the ...

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  • Water Treatment Products Limited Equipment - Dosage

    2016-3-3 · If you go below 10% pump accuracy tends to become non linear and hence less accurate. The variation by a factor of 10 in both Stroke Length and Stroke Rate gives rise to a Turn Down Ratio of 10 x 10 = 100. Thus a Turn Down Ratio of 100 means that the pump is capable of dosing down to 1/100th of its maximum output.

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  • Automatically Changing a Chemical Metering Pump’s

    2016-9-19 · It will do this for you, automatically, and you’ll know you aren’t wasting money in excess chemical dosing. Conclusion If you are in the market for a heavy duty chemical metering pumped designed to run 24/7/365 that can also be set up to be a very flexible and adaptive pump, give a Madden metering pump a try.

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  • Pulsafeeder Diaphragm Metering Pumps

    2014-1-6 · For changes in the piston travel, or stroke length, a mechanical adjustment within the pump is used. In order to change stroke speed (frequency), some form of variable speed drive is used to change the rotation speed of the drive motor, for example a DC-SCR drive, or an AC VFD. Section 1, Flow Rate vs. Motor Speed Adjustment

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  • Sizing and Selecting Metering Pumps

    2019-10-10 · pump stroke length, or by variable speed drives which change the stroking speed. Using a positioner gives you the full 10:1 turndown, the full adjustable range. Using a variable speed drive will give you only as much turndown as the ratio of the pump stroking speed divided by the minimum operating speed of the pump.

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  • Pump speed and stroke control | Automation &

    2008-8-8 · of the metering pump. The secondary loop, the trim loop, which is a 'feed back' loop, is the pH meter, and its output drives the stroke length adjustment. So no, you don't use two separate loops, exactly, but you do. They aren't separate because they interact. And mostly, you don't use the Integral term at all, and often not the Derivative term.

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  • What is stroke length of a pump? - Answers

    2014-6-18 · The stroke length of a pump is the distance it travels up before it travels down. The distance traveling up takes in air or water depending on the type of pump. The down pressure expels the air or ...

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  • Chemicals Injection Pumps Calibration Basics -

    2016-2-25 · the stroke length knob is set at 30% of maximum and stroke frequency is 20% of maximum, total output will be approximately 6% of the pump’s maximum rating. this is .2 x.3 = .06 or 6%. B.

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  • Instruction Manual - LMIPumpCatalog.com

    However, it is still common to control a piston diaphragm pump’s motor speed with a 4–20 mA signal from a flowmeter in the stream to be dosed.This is known as flow pacing, and when used in conjunction with stroke length control as described in the next section, it can give very accurate (±0.1 pH units) pH control.. On the other hand, some engineers use simple speed control proportional to ...

    Get Price
  • Pump Performance | Control the flow with metering

    2011-11-3 · The capacity in the original metering pump was changed by adjusting the stroke length of the piston from outside the pump. Figure 4 shows the same concept, but its stroke length adjustment via an internal, oil-bathed gear system is a technology introduced about 30 years after the first metering pump. This drive type is readily available today.

    Get Price
  • What is a dosing pump and how does it work? |

    2015-8-1 · How do dosing pumps work? Depending on the brand and model, a dosing pump functions in a variety of different methods. All these methods involve taking a measured amount of a chemical and then injecting that product into a pipe or similar vessel. There are a couple of major parts to a dosing pump setup: The chemical tank or container.

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  • Maintaining Metering Pump Accuracy | Pumps &

    2009-6-1 · Using advanced motor technology with a multi-sensor control circuit, the latest digital dosing pump technology controls suction and discharge while using a constant 100 percent stroke length. The advantage of digital dosing is that suction is always performed in conjunction with a full stroke volume, changing only motor speed.

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  • Metering & Dosing Pump Operations - Accendo

    Metering & Dosing Pump Operations. Metering and dosing pump operation. Any positive displacement pump can be used as a metering or dosing pump. The purpose of these pumps is to inject a known volume of liquid into a process stream. The primary requirement is that over a given period of time the pump consistently delivers the same amount of liquid.

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  • Sizing and Selecting Metering Pumps Planning a

    2013-7-3 · Metering pump flow rate can be controlled auto-matically (in response to a process signal) by electric or pneumatic positionerswhich change the pump stroke length, or by variable speed driveswhich change the stroking speed. Using a positioner gives you the full 10:1 turndown, the full adjustable range. Using a variable speed drive will give you ...

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  • Operating Instructions Manual ProMinent gamma L

    2009-7-6 · 1 About This Pump The pumps in the ProMinent® gamma L pump series are microprocessor controlled solenoid dosing pumps with the following special features: • The feed rate can be displayed in l/h and/or gal/h (calibrated), or in strokes/min. • The stroke rate is continuously adjustable and is displayed in the LCD display.

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  • Process and Control | sera GmbH - sera Dosing

    Batch dosing with pre-selection pulse counter The required number of pump strokes per batch is set with an electronical pre-selector. Once a start pulse is given, the pump begins to operate. At each pump stroke the stroke frequency initiator on the pump subtracts one stroke at the pre-selection counter.

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  • IWAKI Electoromagnetic Metering Pumps EHN series

    2017-7-4 · and allows you to delicate pump control. Basic type EHN-R series Manual operation Pump run/stop and stroke rate setting (1 to 360 spm) can be done by keys. Stroke rate can be set either when pump is running or stopped. EXT operation Multiply (1 : n) Pump makes multiply operation by external pulse signal. Pump makes “n” times shots

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  • PD Pump Fundamentals, Design and Applications

    2012-2-21 · Editor's Note: This is the fifth in a series of five articles based on the Hydraulic Institute's new Positive Displacement (PD) Pumps: Fundamentals, Design and Applications e-Learning course. To read the previous article, click here. Last month, we introduced Module 4 of the course, which focused on reciprocating pumps. In this issue, we will focus on metering pumps.

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  • Metering Pumps with “Pulse-Free” Linear Flow

    2018-5-17 · change. • eplenishment valve in every piston assembly ensures A r optimum actuating oil on every stroke for continuous accuracy - other metering pumps can leak oil past the plunger and may not be able to compensate on every stroke. Both the Hydra-Cell pump and triplex metering pump shown have the same flow capacity and pressure rating. Hydra-Cell

    Get Price
  • Metering & Dosing Pump Operations - Accendo

    Metering & Dosing Pump Operations. Metering and dosing pump operation. Any positive displacement pump can be used as a metering or dosing pump. The purpose of these pumps is to inject a known volume of liquid into a process stream. The primary requirement is that over a given period of time the pump consistently delivers the same amount of liquid.

    Get Price
  • Pump Performance | Control the flow with metering

    2011-11-3 · The capacity in the original metering pump was changed by adjusting the stroke length of the piston from outside the pump. Figure 4 shows the same concept, but its stroke length adjustment via an internal, oil-bathed gear system is a technology introduced about 30 years after the first metering pump. This drive type is readily available today.

    Get Price
  • IWAKI Metering Pump

    2013-7-5 · ¥ Do not step on pump If you step on the pump as a stand, you may be injured by falling down or so. ... on the control shaft is rotated to change the stroke length. 2. Operating Principle MODEL 1P411712 IWAKI CO.,LTD. TOKYO JAPAN Iwaki Metering Pump MAX. CAPACITY R/min MAX. PRESSURE MPa

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  • Re-defining the concept of a metering pump -

    2006-10-1 · A metering pump's capacity is a function of the diameter of the plunger, the effective length of the stroke and the rate or speed of stroking. Since the diameter of the plunger must remain constant in any given pump, varying the stroke length and pump …

    Get Price
  • Mechanical-return diaphragm dosing pump

    Stroke rate 78 116 156 stroke/minute Stroke length 2 4 6.4 7.4 mm Diaphragm diameter 65 96 124 140 mm Motor 0.25 0.37 kW Material of pump head SS 316L and PVDF Protection degree IP55 Mechanical-return diaphragm dosing pump 3

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  • PROMINENT GAMMA L OPERATING INSTRUCTIONS

    Page 1 Operating Instructions Manual ® ProMinent gamma L Solenoid Dosing Pump Please affix nameplate here! Please read the operating instructions through completely before commissioning this equipment! Do not discard! Any part which has …

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  • Emec Dosing Pumps & Control System

    2021-5-15 · emec by CWC. Everything you need to know! For over 12 years, CWC has successfully represented EMEC Srl, a high quality European manufactured range of Dosing Pumps, Controllers and Accessories for water treatment chemicals used in manufacturing and industrial processes.

    Get Price
  • Dosing Pump Double Diapraghm - Chemical plant

    2015-10-14 · All dosing pump ( hydraulic oil) is having bottom suction and top discharge: ... do you think, it pump air, so it drop by 50 to 60 % ? Check to make sure it doesn't have variable stroke length as well as variable speed- many of the dosing pumps do. If it does have variable stroke length- be sure to check the manufacturers instructions about how ...

    Get Price
  • Pump calculations - The Engineering Mindset

    2017-9-11 · In this article we learn how to perform pump calculations in both imperial and metric units to assess pumping performance following the change of flow rate, pump speed, head pressure and power. These formulas are common practice rules of thumb and provide theoretical values to which actual values will likely differ. YouTube video tutorial at […]

    Get Price
  • Useful information on positive displacement pumps

    Useful information on positive displacement pumps What is a positive displacement pump? A positive displacement (PD) pump moves a fluid by repeatedly enclosing a fixed volume and moving it mechanically through the system. The pumping action is cyclic and can be driven by pistons, screws, gears, rollers, diaphragms or vanes.

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  • Instruction Manual - LMIPumpCatalog.com

    2016-2-25 · the stroke length knob is set at 30% of maximum and stroke frequency is 20% of maximum, total output will be approximately 6% of the pump’s maximum rating. this is .2 x.3 = .06 or 6%. B.

    Get Price
  • INSTALLATION OPERATION MAINTENANCE INSTRUCTION

    2013-11-19 · change in pump output (stroke length) and feedback signal. If the feedback signal is greater than the command signal, the other brake is energized, changing the pump output and feedback signal in the reverse direction. When the feedback signal matches the command signal, stroke length is properly positioned and adjustment is halted.

    Get Price
  • Dosing Equipment Brochure - docs.certikin.com

    2014-7-24 · e.g. if a system takes 30 minutes to register the level change, potentially the pump can be dosing at maximum speed for 30 minutes before this is realised. Proportional - as the parameter reading drifts away from the set point, the dosing pump speed incrementally increases i.e. the further from the set point, the higher the pump stroke frequency.

    Get Price
  • Automatic-Dosing-Pump | Southern Filters

    Gramos Orapis Automatic dosing pump, the F series electromagnetic dosing pumps are designed to be simple and economical to install and used for mounting on a vertical surface where space is limited. The pumps have a fixed stroke length and the output is controlled by adjusting the pump frequency or number of strokes per minute the pump ...

    Get Price
  • Re-defining the concept of a metering pump -

    2006-10-1 · A metering pump's capacity is a function of the diameter of the plunger, the effective length of the stroke and the rate or speed of stroking. Since the diameter of the plunger must remain constant in any given pump, varying the stroke length and pump speed are the only ways to adjust flow.

    Get Price
  • Emec Dosing Pumps & Control System

    2021-5-15 · emec by CWC. Everything you need to know! For over 12 years, CWC has successfully represented EMEC Srl, a high quality European manufactured range of Dosing Pumps, Controllers and Accessories for water treatment chemicals used in manufacturing and industrial processes.

    Get Price
  • Mechanical-return diaphragm dosing pump

    Stroke rate 78 116 156 stroke/minute Stroke length 2 4 6.4 7.4 mm Diaphragm diameter 65 96 124 140 mm Motor 0.25 0.37 kW Material of pump head SS 316L and PVDF Protection degree IP55 Mechanical-return diaphragm dosing pump 3

    Get Price
  • ENCORE LIQUID CHEMICAL METERING PUMPS

    2018-3-1 · pulsation dosing. Solenoid Pump The Encore® E (electronic) solenoid pump is a good value choice for simple and continuous dosing applications. The Encore® EM/ED/EK/EP model is available in seven capacity ranges, up to 3.96 gph. The Encore® EA/EB model is available in three capacity ranges, up to 27.7 gph. The pump is certified for

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  • Pump Tips: Bolus Dosing - diabetesalaska.com

    2018-3-6 · If you find yourself under 6 at the two hour mark, you may wish to cancel the rest of the bolus, do this by just putting the pump into suspend then removing the suspend the same way you would cancel any other bolus. You may be on the rise though so the only way to know is to test your BG every hour after the 2 hr post meal sugar.

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  • Dosing Pump Double Diapraghm - Chemical plant

    2015-10-14 · All dosing pump ( hydraulic oil) is having bottom suction and top discharge: ... do you think, it pump air, so it drop by 50 to 60 % ? Check to make sure it doesn't have variable stroke length as well as variable speed- many of the dosing pumps do. If it does have variable stroke length- be sure to check the manufacturers instructions about how ...

    Get Price
  • Automatic-Dosing-Pump | Southern Filters

    Gramos Orapis Automatic dosing pump, the F series electromagnetic dosing pumps are designed to be simple and economical to install and used for mounting on a vertical surface where space is limited. The pumps have a fixed stroke length and the output is controlled by adjusting the pump frequency or number of strokes per minute the pump ...

    Get Price
  • INSTALLATION OPERATION MAINTENANCE INSTRUCTION

    2013-11-19 · change in pump output (stroke length) and feedback signal. If the feedback signal is greater than the command signal, the other brake is energized, changing the pump output and feedback signal in the reverse direction. When the feedback signal matches the command signal, stroke length is properly positioned and adjustment is halted.

    Get Price
  • IWAKI AMERICA LK SERIES METERING PUMP

    2019-9-19 · connected with the shaft, changing the volume inside the pump chamber. The variation in volume inside the pump chamber and the functioning of the valves in the pump head produce the pump operation. To adjust stroke length, the adjusting dial fixed on the control shaft is rotated to change the return of the slider. M SHAFT G L SHAFT L R SHAFT R

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  • Dosing Equipment Brochure - docs.certikin.com

    2014-7-24 · e.g. if a system takes 30 minutes to register the level change, potentially the pump can be dosing at maximum speed for 30 minutes before this is realised. Proportional - as the parameter reading drifts away from the set point, the dosing pump speed incrementally increases i.e. the further from the set point, the higher the pump stroke frequency.

    Get Price
  • Emec Dosing Pumps & Control System

    2021-5-15 · emec by CWC. Everything you need to know! For over 12 years, CWC has successfully represented EMEC Srl, a high quality European manufactured range of Dosing Pumps, Controllers and Accessories for water treatment chemicals used in manufacturing and industrial processes.

    Get Price
  • PROMINENT GAMMA L OPERATING INSTRUCTIONS

    Page 1 Operating Instructions Manual ® ProMinent gamma L Solenoid Dosing Pump Please affix nameplate here! Please read the operating instructions through completely before commissioning this equipment! Do not discard! Any part which has …

    Get Price
  • Dosing Pump Double Diapraghm - Chemical plant

    2015-10-14 · All dosing pump ( hydraulic oil) is having bottom suction and top discharge: ... do you think, it pump air, so it drop by 50 to 60 % ? Check to make sure it doesn't have variable stroke length as well as variable speed- many of the dosing pumps do. If it does have variable stroke length- be sure to check the manufacturers instructions about how ...

    Get Price
  • Solenoid Metering Pump, gamma X, GMXa - Progressive

    2019-5-31 · Solenoid Metering Pump gamma X, GMXa Operating instructions EN Part no. 984586 Original Operating Instructions (2006/42/EC) BA G 045 07/15 EN Please carefully read these operating instructions before use. · Do not discard.

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  • Pump calculations - The Engineering Mindset

    2017-9-11 · In this article we learn how to perform pump calculations in both imperial and metric units to assess pumping performance following the change of flow rate, pump speed, head pressure and power. These formulas are common practice rules of thumb and provide theoretical values to which actual values will likely differ. YouTube video tutorial at […]

    Get Price
  • Metering Pumps with “Pulse-Free” Linear Flow

    2017-9-11 · change. • eplenishment valve in every piston assembly ensures A r optimum actuating oil on every stroke for continuous accuracy - other metering pumps can leak oil past the plunger and may not be able to compensate on every stroke. Both the Hydra-Cell pump and triplex metering pump shown have the same flow capacity and pressure rating. Hydra-Cell

    Get Price