PUMPS DP5000/DR5000 DC4000/DC4500
What is the fastest and easiest way to buy LMI products?
- LMI has a worldwide network of distributors that stock and service the complete line of LMI products. Click here for our distributor locator.
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Are the new LiquiProTM 300 Series liquid ends compatible with the existing pumps?
- Complete LiquiProTM liquid ends may be installed on most existing pumps, however, most parts of a LiquiProTM liquid end are not interchangeable with non- LiquiProTM liquid ends. Contact your distributor to learn more about the advantages of LiquiProTM
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What is the maximum suction lift of an LMI pump?
- In most cases, 5 feet. High viscosity liquid ends have a maximum lift of 3.5 feet, however, flooded suction is recommended for viscous chemicals or chemicals that off-gas readily. Click here for typical installation diagrams.
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Can an LMI type “7” pump accept a 4-20 ma signal?
- Yes, but not directly. They need a Micropace MP-100 analog to Digital Converter. This converts a milliamp signal to a series of dry contact switch closures that the pump will accept. The response is direct and fixed (4 ma = 0 strokes/minute, 20 ma = 100 strokes/minute). For more flexibility, upgrade to the type “9” pumps which allow you to program any direct or inverse response to the ma signal.
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Can I program a back-up pump to come on automatically in the event the first pump loses prime?
- Yes! Use two type “9” pumps equipped with Digi-Pulse Flow Monitors. If the first pump loses prime, it will stop pumping and activate a switch to start a second pump. Click here for more information
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What is the maximum viscosity my LMI metering pump will handle?
- LMI electronic metering pumps with standard liquid ends will handle most chemicals up to 400 centipoise. High viscosity liquid ends will handle thixotropic chemicals with apparent viscosities up to 40,000 centipoise.
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Is my LMI pump intrinsically safe? Can it be used in a hazardous location?
- Most electronic pumps are not intrinsically safe. The “E” Series pumps from LMI are explosion-proof and meet or exceed all standards for Class I, Division 1, Groups C and D; Class II, Division 1, Groups E, F and G.
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How often do I need to perform maintenance on my LMI pump?
- It depends on the application. We recommend performing maintenance every six to twelve months. This includes changing the LiquiframTM, balls and seal rings (cartridges for LiquiProTM liquid ends). all of these parts are included in LMI's RPM Pro PacTM Kits.
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What if I need a pulsation dampener? Does LMI offer one?
- LMI B7, C7 and type “9” pumps have built-in pressure control. This feature allows you to adjust the power capacity, which reduces noise, shock and vibration in the system. It also prolongs the pump's life.
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Do I need a pressure relief valve for my pump?
- Motor-driven pumps must be installed with a pressure relief valve. Electronic pumps have inherent pressure relief. If the pressure exceeds the pump's capacity, it will stall without damage to the pump.
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How can I feed chemical in proportion to flow?
How can I feed chemical in proportion to flow?
- LMI electronic metering pumps are simple to control from an external signal. By using an LMI pump with an RFP Remote Flowmeter Pulser, the speed of the pump will be controlled by the flow rate of the water.
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PUMPS DP5000/DR5000 DC4000/DC4500
What is the fastest and easiest way to buy LMI products?
- LMI has a worldwide network of distributors that stock and service the complete line of LMI products. Click here for our distributor locator.
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Which LMI conductivity controller do I use for a boiler?
- The DC4000 Conductivity Controller can be easily programmed as either a boiler or cooling tower controller. In the cooling tower mode, it offers feed and bleed control with four inhibitor feed modes. In the boiler mode, it offers feed and bleed control with timed or continuous sampling. Try the new “time trap” sampling method which eliminates most steam flashing problems in boilers
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Which LMI conductivity controller do I use for a cooling tower if I want to control two biocide pumps?
- The DC4500 Conductivity Controller is a feed and bleed cooling tower controller with two programmable biocide timers. This controller is very easy to program and has a long list of standard features.
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How do you clean a conductivity probe? How often should I clean it?
- Clean the probe with a soft cloth and mild cleaning solution or emery cloth if necessary. The probe should be cleaned parallel to the electrodes (not across the electrodes). The frequency of cleaning will depend on the installation but we recommend cleaning after the initial two weeks of operation. Increase or decrease the frequency depending on the condition of the probe.
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Is the programming saved in memory when the controller is shut off or loses power?
- The programming is not lost due to any form of power interruption. The programming is saved in non-volatile ram and has a retention span of 10 years. This enables the controller to be programmed prior to installation if desired.
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What is the maximum distance between the conductivity controller and the probe?
- The maximum distance between the conductivity controller and the probe is 1000 feet. We recommend separating the transmitter and receiver (black and red) wires of the cable after a distance of 30 feet. This reduces the likelihood of inaccurate readings.
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Why does my DC4000 Controller have erratic readings after the motorized ball valve closes on a boiler?
- as soon as the motorized ball valve opens, the pressurized water can turn to steam which causes erratic reading on the display. after the valve closes it takes time for the water to become pressurized again and for the steam to dissipate. We recommend that you utilize the Trap Sample option of this controller located in the Timed Boiler Sampling. This option traps a sample until the boiler water re-pressurizes. The controller will measure the conductivity at the end of the trap sample programmed time. The trap time should be gradually increased until erratic readings are eliminated.
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PUMPS DP5000/DR5000 DC4000/DC4500
What is the fastest and easiest way to buy LMI products?
What is the fastest and easiest way to buy LMI products?
- LMI has a worldwide network of distributors that stock and service the complete line of LMI products. Click here for our distributor locator.
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What is a quick and easy way to test the pH/ORP Controller?
- The first thing to do is isolate the controller from the electrode & cable. To do this, disconnect the electrode and cable from the controller. To test the controller, short the BNC connector on the side of the controller with a paper clip. The controller should display close to 0.0 mV or pH 7 if it is properly calibrated. This will give you an indication of whether the controller is working properly. Next, examine the condition of the cable and electrode. The electrode may need to be cleaned. If it won't calibrate properly after cleaning, it probably needs to be replaced.
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What is the maximum distance between the electrode and the pH or ORP controller?
What is the maximum distance between the electrode and the pH or ORP controller?
- The maximum recommended distance without a pre-amplifier is 25 feet. For longer distances, a pre-amplifier and cable assembly may be ordered with your controller from your LMI distributor.
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Can my pH/ORP controller be used for batch treatment?
- Yes! LMI pH and ORP Controllers are ideal for batch treatment. Chemical feed pumps may be controller proportionally or on/off. Timers are included to power a solenoid dump valve when the batch is within range. Contact your LMI distributor for more information.
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What is the difference between on/off and proportional control? Which is more accurate?
What is the difference between on/off and proportional control? Which is more accurate?
- On/off control is just how it sounds: the controller switches power to the pump when chemical feed is required. Proportional control has the ability to increase or decrease the speed of the pump in relation to the set point. Proportional control normally results in better control and less chemical consumption.
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What if I need very fine control of my pump profile?
- The DP/DR5000 controllers offer a third set point that allows for very precise chemical feed pump control based on the relation to the pH or ORP set point. This is a popular feature in some plating applications.
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