FAQ&TIPS
FAQ
Q - What’s the main products of your company?
A - We specialized in all kinds of micro pumps (including gear pumps, diaphragm pumps, centrifugal pumps, impeller pumps, etc.) for over 10 years with excellent quality and competitive.
Q - How can I contact SOVOFLO's technical or sales support?
A - There are several ways to contact our technical or sales staff: By phone at +86-136-69830164 from 8:00 AM to 6:00 PM Beijing time in working days, by email at info@sovoflo.com or via live chat on our Skype: kevinouge.
Q - How do I order a custom product from SOVOFLO?
A - Please contact on of our sales engineers by E-mail: info@sovoflo.com. Our highly trained team will help you source the custom product you need. You may also purchase a pump from our online store: https://www.aliexpress.com/store/1100489247
Q - How can I choose the most suitable pump?
A - Please tell me your detailed flow rate, pressure, running time, voltage, application, fluid, ambient temperature and so on, then I will match the most appropriate pump for you, or you can choose the exact model in the product manual.
Q - What information can I get when I contact your sales engineers?
A - Our sales engineers can assist you with product selection and recommendation, troubleshooting and technical assistance, manuals and documentation, custom and unique product sourcing, complete application solutions and much more!
Q - I order the same items frequently, can I get them shipped automatically on a regular basis?
A - You can place a blanket order for up to a year with us, specifying the amounts and dates you want shipped.
Q - What’s your delivery time?
A - 1.The stock samples can be sent to you within 3-5 days by international express after received 2.The batch order can be shipped to you in about 30-40days after order confirmation (by air or by sea)
Q - My application requires an opening flow/pressure that is not listed on your charts, would it be possible to get a custom spring?
A - Yes, we do design custom springs for special applications.
Q - Can I buy one pump directly from SOVOFLO?
A - SOVOFLO Micro Pumps builds to order for the Original Equipment Market. Generally, the customer can purchase from the factory directly, or You may also purchase a pump from our online store: https://www.aliexpress.com/store/1100489247. We support payment via T/T, Credit Card, Western Union, Alipay and Paypal etc.
Q - Why is it necessary to know the size and length of tubing the pump will be connected to?
A - Long or restrictive tubing causes high pressure drags. This will reduce the pump flow and/or require more power.
Q - Which pumps can I run dry?
A - Diaphragm pumps, piston pumps and peristaltic pumps can be run dry for any length of time. Centrifugal, rotary vane, and gear pumps should not be run dry; exceptions are if the gear or impeller is made of a self-lubricating material such as RYTON in which case the pump can be run for a few minutes while priming.
Q - What is the maximum viscosity rating for pumps?
A - This depends on the type of pump and the specific pump. Diaphragm pumps (especially double diaphragm pumps) and gear pumps are usually the best for viscous fluids.
Q - What about quality assurance?
A - We offer one warrantee period beginning from the time of shipment for OEM application, we can provide spare parts for replacements, if our serious product problems, we can make replacement of free charge.
Q - What about the price level?
A - We are confident that our prices are competitive compared with those at the same quality level, since we have stayed in this filed more than 14 years. And we always adhere to the principle of provide top quality products with competitive prices.
Q - WHAT IS AN EXTERNAL GEAR PUMP?
A - An external gear pump is a volumetric pump that has two gears meshing with each other in a close-fitting housing. As the gears rotate, fluid fills the space between corresponding gear teeth and is carried from the inlet side to the outlet around the external circumference of the gears. Where the teeth mesh together, fluid cannot pass and so it is ejected through the outlet.
Q - WHAT CONSIDERATIONS SHOULD BE MADE FOR PUMP INSTALLATIONS?
A - It is good practice to keep inlet lines as short and restriction free as possible, so ideally mount the pump under the reservoir. The pump can prime if mounted above the reservoir but this is less efficient and special priming procedures may be required. An appropriately sized filter should be fitted in the inlet flow path. Isolation valves installed on either side of the pump may make servicing cleaner/simpler where tanks are not drained regularly.
Q - WHAT CHEMICALS CAN BE PUMPED?
A - Our pumps are manufactured in a range of materials and it is possible to find a compatible material for most fluids. In any case given the variety of conditions and fluids it is always advisable testing the pump in the circuit, under conditions and with the fluid which will then be in operation.
Q - CAN THE PUMPS BE USED FOR METERING?
A - All of our pumps are positive displacement units and can be used in metering applications. Accuracy and repeatability will be dependent on the pump type used, the drive/control system, and the fluid. Please contact us for further information.
Q - WHAT DRIVES ARE AVAILABLE?
A - We offer a range of different drive types including DC, Brushless DC, Integrated, AC and Stepper motors. Air driven motors are also availbale on some models.
Q - WHAT SHOULD BE CONSIDERED WHEN DESIGNING A PIPING SYSTEM FOR PUMPS?
A - Keep suction requirements to a minimum, bends are better than elbows. Keep the tank high and the pump low. Use appropriately sized piping or tubing. Use isolation dampeners to avoid vibration induced noise. Design a filter before the pump and maitain it clean.
Q - WHAT ARE THE ADVANTAGES OF MAGNETIC DRIVE VERSUS TRADITIONAL SHAFT SEALS?
A - Magnetic couplings eliminate rotating seals and a potential source of wear and contamination, besides reducing the power consumption and increasing the life of the pump. Use magnetic couplings when seal failure could cause environmental or hygiene problems. They are also more reliable when high system pressure is involved.
Q - HOW CAN I DETERMINE THE PUMP INPUT POWER?
A - SOVOFLO can calculate the input power required based on your duty requirements and fluid characteristics.
Q - WHAT NOISE LEVEL DO THE PUMPS EMIT?
A - Noise levels are dependant on mounting of the pumps, motor speeds/types and fluid types. There are infinite combinations. A reference value at 3 bar of differential pressure, 3000 rpm of speed, is 48 dB at 1 meter (for gear pumps).
Q - WHAT MOUNTING OPTIONS ARE AVAILABLE?
A - A number of mounting options are available depending on the motor/drive requirements, including compatibility with most standard frame sizes. Please contact Fluid-o-Tech for further information.
Q - CAN LIQUIDS CONTAINING SOLIDS BE PUMPED?
A - Only through the internal gear pumps.
Q - CAN THE PUMP BE RUN IN REVERSE?
A - Our pumps are optimised for forwards flow but can be run in both directions. However, if a bypass is installed, that will impede reverse performance.
Q - CAN THE PUMP DRY RUN?
A - Not the models with mechanical seal. Pumps with magnetic drive are more tolerant, however dry running should be minimised to avoid damage to bearing surfaces.
Q - WHAT IS CAVITATION?
A - Cavitation is the formation of vapour cavities in a liquid ("bubbles" or "voids") – that are the consequence of the pipe connected to the inlet of the pump which is undersized for the flow rate of the pump. Formation of these cavities is a function of the fluid properties and physical properties of the pumping system (available pressure, temperature, pumping speed…). Cavitation generates noise and premature wear of the pump.
Q - DOES THE PUMP SELF-PRIME?
A - Most of our pumps will self-prime - check data sheets for individual characteristics.
Q - WHAT ARE THE OPERATING TEMPERATURES FOR THE PUMP AND MOTOR?
A - Most of our units will run happily to 80°C (176 °F), some up to 120 °C (248 °F). This is dependent on which model is selected. Beyond that there may be a need for special consideration of magnets, clearances, motor bearings, etc... Consult the factory for higher-temperature applications.
Q - WHAT SYMPTOMS ARE TYPICAL INDICATORS OF AN INEFFICIENT PUMPING SYSTEM?
A - Noise can be a key indicator of a poor pumping system. Excessive noise - particularly on the inlet side - can suggest issues such as cavitation which can dramatically affect efficiency and life. Other indicators are excessive pressure losses through the pipeline, high power consumption by the pump, overheating and vibrations.
Q - WHAT ARE THE EFFECTS OF VISCOSITY ON GEAR PUMP AND SYSTEM PERFORMANCES?
A - Viscosity can be very good for efficiency as thicker fluids have less slip. However, depending on the viscosity, the maximum speed may need to be reduced to prevent excessive loads. Thinner fluids will result in increased slip and reduced efficiency. Consult the factory for details.
Q - HOW CAN I REDUCE THE LEVEL OF EXTRANEOUS NOISE WHEN MEASURING SOUND LEVELS THROUGHOUT A PUMPING SYSTEM?
A - Some noise must be expected. Use of vibration dampeners and isolation damperners will reduce vibration noise at locations of surface contacts. Avoid pipe vibrating against metal surfaces, or motor foot vibrating against metal surface. Plastic piping should be preferred to metal piping for reducing resonance.
Q - WHAT KIND OF GENERAL CONSIDERATIONS SHOULD BE MADE WHEN EVALUATING THE INLET PIPING REQUIREMENTS FOR A PUMP?
A - A pump should have fittings sized for the flow rate needed. Guidance is provided in the instruction manual. If in doubt, please contact a Fluid-o-Tech engineer.
Q - WHAT ARE SOME EFFECTS WHEN A GAS AND LIQUID MIXTURE IS BEING CARRIED THROUGH A GEAR PUMP?
A - A gas/liquid mixture will pass through the pump without any problems. The pump may appear a little noisier as the gas passes through. Also there will be a momentary change in the load on the pump which may be seen through fluctuations in the outlet pressure and power consumed by the motor.
Q - CAN THE PUMP BE SPEED CONTROLLED?
A - Positive displacement pumps deliver a flow proportional to speed. Controlling the motor speed will control the flow rate. Whilst AC motors tend to be fixed speed, most DC and brushless DC motors will offer variable speed capability.
Q - WHAT ARE THE MINIMUM AND MAXIMUM SPEEDS ALLOWABLE?
A - Maximum speeds are stated on the data sheet for each model, however, these figures are based on water. For thicker fluids, maximum speeds will need to be reduced. There is no minimum speed although motor control and slip will be factors in determining lower levels of capability.
Q - WHAT LEVEL OF FILTRATION IS RECOMMENDED?
A - It is recomended to install a 10 microns filter on the inlet of the pump, whose filtrating surface is big enough to avoid pressue drop, in order to protect the pump's internal components.
Q - WHAT AFFECTS THE LIFE OF THE PUMP AND MOTOR?
A - Many factors will affect life. Key issues to consider are the number of stop/start cycles, running speed, load (pressure) and fluid contamination.
Q - HOW CAN WE ADJUST FLOW?
A - With a positive displacement pump, the easiest way to adjust the flow is by adjusting motor speed. There is an almost linear relationship between speed and flow.
Q - WHAT IS THE PRIMING CAPABILITIES OF THE PUMP?
A - Priming performance vary from pump to pump and are dependant on a variety of factors including fluid viscosity, pipe size, vapour pressure, speed and if the pump is wet or dry.
Q - WHAT IS SLIP?
A - Slip is the small portion of fluid that flows back through the pump clearances in the pump and affects efficiency. Thinner fluids pass more easily through these small clearances so the pump will be less efficient with thicker or more viscous fluids.
