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Masterflex L/S Economy Variable-Speed Drive, 20 to 600 rpm, 115 VAC

Representative image only.
Masterflex Item # EW-07554-90
An economical and versatile variable-speed drive with a wide flow range
  • Separate single-turn speed control and on/off switch with green power indicator—maintain speed setting while turning pump on/off.
  • The 1/20-hp unidirectional motor (counterclockwise) has soft start and back EMF for ±5% speed control.
  • Stackable painted steel housing is IP22 rated for protection from vertically falling water.
  • 115 VAC models are UL and cUL listed; 230 VAC models are CE marked in compliance with European Community standards.
  • 6-ft (1.8-m) line cord; 115 VAC: U.S. standard plug; 230 VAC: IEC 320/CEE22 socket—pumps are shipped with cord/plug set specific to destination country.

SPECS & DESCRIPTION

Specifications & Description

  • Pump SeriesL/S
  • Control TypeAnalog Variable Speed
  • Min RPM (rpm)20
  • Max RPM (rpm)600
  • SpeedVariable
  • Speed Control±5%
  • Max Flow Rate (mL/min)2900
  • Min Flow Rate (mL/min)1.2
  • Reversible MotorNo
  • No. of Pump Heads Accepted1
  • Type of Pump Heads AcceptedStandard, Easy-Load, Easy-Load II, Easy-Load 3
  • Motor (watts)37
  • Drive IP ratingIP 22
  • Power (VAC)90 to 130
  • Power (amps)1.5
  • Power (Hz)60
  • Drive Length (in)9
  • Drive Width (in)7
  • Drive Height (in)6
  • Drive Length (mm)229
  • Drive Width (mm)178
  • Drive Height (mm)152
  • Open-Head SensorNo
  • Housing MaterialPainted Steel
  • Motor hp1/20
  • DescriptionL/S economy variable-speed drive, 20 to 600 rpm, 115 VAC.
Two year warranty

Key Features

  • Separate single-turn speed control and on/off switch with green power indicator—maintain speed setting while turning pump on/off.
  • The 1/20-hp unidirectional motor (counterclockwise) has soft start and back EMF for ±5% speed control.
  • Stackable painted steel housing is IP22 rated for protection from vertically falling water.
  • 115 VAC models are UL and cUL listed; 230 VAC models are CE marked in compliance with European Community standards.
  • 6-ft (1.8-m) line cord; 115 VAC: U.S. standard plug; 230 VAC: IEC 320/CEE22 socket—pumps are shipped with cord/plug set specific to destination country.

More About this Item

Our lowest priced variable-speed drives are a perfect upgrade from a fixed-speed drive. These drives include a wider rpm range, ±5% speed regulation, and UL, cUL, and CE listings. For added versatility, these drives accept the L/S® pump head styles specified below.

REVIEWS

Q&A

Do you have questions about this product?

Get answers from real customers and in-house experts with AnswerBox.

15 Questions | 15 Answers
Displaying questions 1-10Previous | Next »
  • Q:

    What is the setting on the drive to rpm factor? For example a setting 4, how much rpm is that? Or a setting 6?
    Asked on 1/11/2017 by Uli

    1 answer

    • STAFF EXPERT

      A:

      There is not an exact factor between each number with the speed.

      At 1, the RPM is 20.
      At 5 (middle point), the RPM is 300.
      At 10 (maximum), the RPM would be 600.

      On average, the RPM for each notch would be around 96 RPM.

      Answered on 1/12/2017 by Anthony from Technical Support
  • Q:

    Is it feasible to change the gear-set to convert the 7554-80 model (7-200 rpm) to 20-600 rpm speed?
    Asked on 4/6/2016 by Jalan from Stockton, CA

    1 answer

    • STAFF EXPERT

      A:

      No because the motor is still going to be turning to 200 RPM. If you need up to 600 RPM, i would recommend purchasing the 07554-90

      Answered on 4/7/2016 by Anthony from Technical Support
  • Q:

    Is this pump rated for use with diesel fuel? Also, can the pump handle high levels of contaminant without risk of plugging? I am flowing ULSD at 75 to 300ml at a BUG of 40 using ISO FTD for sustained periods of time; How many hours of reliable service could I expect to see before failure/overhaul? Please let me know what product would suit my needs.
    Asked on 4/5/2016 by Kevin

    1 answer

    • STAFF EXPERT

      A:

      This is the drive only. To make a complete system you will need a pump head and tubing. The Masterflex Tygon Fuel and Lubricant tubing is best with fuel. For pumping particulate with Masterflex tubing for hard particulate it should only be a size of 5% of the tubing ID and for soft particulate it should be only 25% of tubing ID.

      Answered on 4/6/2016 by Danielle from Technical Support
  • Q:

    What is the viscosity range the machine can run?
    Asked on 3/21/2016 by Srdjan from Germantown, WI

    1 answer

    • STAFF EXPERT

      A:

      It depends on the tubing and the flow rate that you would need for your application. Using the largest tubing, you would want to stay around 3000 cps maximum.

      Answered on 3/21/2016 by Anthony from Technical Support
  • Q:

    Whats the wattage of this device? I have a 110 volt device and need to bring it to Europe (230V) and am curious how much my transformer will have to handle.
    Asked on 2/9/2016 by DocFlo from United States

    1 answer

    • STAFF EXPERT

      A:

      This item is dual voltage. Please contact us directly because we might have the plug you would likely need for Europe.

      Answered on 2/9/2016 by Anthony from Technical Support
  • Q:

    Does this unit have brushes and if so, are they replaceable?
    Asked on 8/18/2015 by Ken @ WardKraft

    1 answer

    • STAFF EXPERT

      A:

      Yes, the brushes are replaceable. It is item 07520-06

      Answered on 8/18/2015 by Anthony from Technical Support
  • Q:

    What is the max pressure it can operate at? Can it handle up to 120 psi under operation?
    Asked on 9/15/2014 by Benjamin from United States

    1 answer

    • STAFF EXPERT

      A:

      The max pressure is determined by the pressure rating on the tubing being used. The Masterflex line of tubes will have a max pressure rating ranging from 15 to 40 psi.

      Answered on 9/15/2014 by Polo from Technical Support
  • Q:

    If I am pumping salt water using this pump and an Easy Load II Pump Head with one tube that splits into two to go to two tanks using TBNG MFLEX TYGON ELFL #16 25' tubing and I want each to have a flowrate of 40mL/minute, how far should I turn the 1-Turn Speed control knob? Any help would be appreciated.
    Asked on 7/28/2014 by William from St. Louis, MO

    1 answer

    • STAFF EXPERT

      A:

      There are a number of factors that affect the flow rate and it is best to calibrate a dial setting using a graduated cylinder. However, the max speed on that drive is 600rpm, and the max flow from an L/S 16 tubing under ideal conditions is 480 mL/min. Expect a flow rate of 0.8 mL/rev. You need a flow of 40 x 2 = 80mL /min. That would suggest a rotational speed of 100rpm. Turn it approximately 1/6 of the way.

      Answered on 7/28/2014 by Jay from Technical Support
  • Q:

    Why does the drive T-07554-90 only accept 1 pump head whereas the 7-200rpm drives (T-07554-80 and T-07554-85) accept 2 pump heads?
    Asked on 4/24/2014 by Jamie

    1 answer

    • STAFF EXPERT

      A:

      The 20-600 rpm drive will only have 191 N-cm of available starting torque while the 7-200 rpm drive has 381 N-cm. This torque will then limit the number of pump heads which can be installed.

      Answered on 4/24/2014 by James from Technical Support
  • Q:

    What is the torque force on the rotor? I can't find it on the technical sheet.
    Asked on 3/25/2014 by Kenyi from Florida

    1 answer

    • STAFF EXPERT

      A:

      Maximum starting torque for this drive is 270 in-oz. Maximum running torque is 90 in-oz.

      Answered on 3/26/2014 by Jack from Technical Support
Displaying questions 1-10Previous | Next »

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