Dongguan Sansheng Electrical Appliance Co., Ltd is dedicated to fluid control technology innovation and development for human being. The fluid control is highly and widely involved in human living, enviroment protection, industry and production, energy saving. etc. Its development lasts for thousands of years from farming era to nowadays.
Dongguan Kodo Tech Co., Ltd. is a Sansheng company focusing on pump&valve design and manufacturing based in China.
The company was founded in 2001, with the primary business on electric sprayer in agriculture in early period.
As the increasing demand for food grade pump on tea table popular in south China, the company turned its business to provider high quality pumps in food and drink area in 2008. The pumps followed Surflo brand. Not only provider pumps, but we also offer the solution of electrical system. Our product covers all Guangdong province.
In 2017, "Sovoflo" brand was born. Different from Kodo following the national standard, Sovoflo pumps follow the international standard such as FDA, NSF, CE and RoHS, UL. The products are widely supplied to the markets of North America, East and South Asia, EU, Russia, etc.
Our factory located in Dongguan City, owns a workshop of 3000 square meters with 12 production lines, a test and research center with all sets of equipments, and an office area.
With business development for years, our products have covered diaphragm pumps, gear pumps, air and vacuum pumps, Marine & RV Pumps, RO pumps, DP pumps, car washer pumps, plunger pumps, piston pumps, Sump Pumps, SEWAGE PUMPS, Effluent Pumps, Grinder Pumps, Dewatering Pumps, Trash Pumps, Self-Priming Sewage & Trash Pumps, Centrifugal Pumps, Booster Pumps, WELL PUMPS, Circulating Pumps, Turbine Pumps, Positive displacement pumps, Jet Pumps, CHEMICAL PUMPS, Drum & Barrel Pumps, Fuel & Oil Transfer Pumps, HVAC Condensate Removal Pumps, Fountain & Pond Pumps, Pool & Tub Pumps and fittings.
Sovoflo pumps are widely used in Automotive Industry, Biofuel Industry, Commercial Buildings, Developing World Water Solutions, District Energy, Drinking water treatment, Family Homes, Food and Beverage Industry, HVAC OEM, Industrial Boilers, Industrial Utilities, Irrigation and Agriculture, Machining, Marine, Metal and Equipment Manufacturers, Mining industry, Pharmaceutical industry, Raw Water Intake, temperature control, Washing and Cleaning, Wastewater Transport and Flood Control, wastewater treatment, Water Distribution, Water Treatment Solutions, etc.

2001.7       Kodo Tech was founded in Dongguan.

2002.2       FLOWMASTER pumps were developed.

2005.6       FLOWEXPERT and FLOWPRESSOR series were brought to the market.

2010.8       FLOWEXPRESS series were customized for OEM demand.

2015.10     FLOWKING and FLOWCARE series were introduced successively.

What to Consider When Choosing a Pump

Knowing the specific fluid pumping requirements of an application up front in the development process is important. Unfortunately many device and system designers neglect to consider the fluid pumping requirements until late in the design process. Many times a designer will have to perform costly alterations to systems or devices to make their design compatible with a pump chosen late in the design process. Being that many times a pump is the “heart” of a system, it makes sense to begin the specification process early rather than later. Careful planning saves not only time and money, but also headaches.

Consider the following items when designing a device that requires a fluid pump:
• Will the pump be self-priming or will it require flooded suction? This is an important factor when considering the positioning and available space for the pump in the system or device.
• Available space and positioning: Problems arise when a design includes “space” for a pump but an actual pump has not been specified. There are many stories of OEMs requesting pumps to fit in small spaces, only to find out that the space will not accommodate the type and size of pump necessary to perform the application’s requirements. Specifying a pump early, rather than later, will assist in the sizing and positioning of a pump and its surrounding space. This promotes pumping efficiency and assists in eliminating costly redesigns.
•The system’s required flow and pressure: Many variables in a system impact the flow and pressure. Understanding the flow and pressure requirements is a starting point to choosing the correct pump. Adding a pump to the system also makes an impact. This is another reason that a pump should be specified early on.
• Wetted materials, fluid, fluid temperature: The materials of the pump components that will be in contact with the pumped fluids are the wetted materials. It is important to understand the materials of the pump and their inherent limitations. Are the materials chemically compatible with the fluid being pumped? Can the materials handle the temperature of the pumped fluid?• Power requirements: AC or DC?
• Environment (temperature, humidity, etc.) The environment plays an important role in pump performance and can affect the life of the pumps. For instance, is there a circulation of air present to help keep the pump cool or will the pump be in an environment where there is not much airflow? Will the environment be one of high humidity where the pump must be resistant to water?
• Continuous run: Does the application require that the pump run continuously or only in short intervals? Knowing the answer to this question, as well as understanding the surrounding environment (heat, humidity), will also affect the life of the pump and its design elements. As illustrated by the previous list, there are many items to consider when specifying a pump for an OEM application. While this list is a good starting point, there are many variables to consider when deciding on the right pump to get the job done. When in the process of specifying a pump, it is important to choose a supplier that is willing to listen to the specific needs of a project and make suggestions and proposals based on those needs.

Some things to consider when choosing a pump supplier:
• OEM or off-the-shelf pump? Does the supplier only offer off-the-shelf (OTS) pumps? This is fine if a pump is identified that matches up with a system’s requirements and specifications. However, considering the previous list, it could be difficult to find an OTS pump that is able to adapt to all of the application’s variables. Working with an OEM pump manufacturer to design a custom pump may initially be more costly. However, in the long run, choosing a supplier that considers all of the application’s details and requirements will provide the best options, long-term success, and ROI
• OEM: Does the pump supplier have a history of working in the original equipment market? What are their engineering and manufacturing capabilities? Do they outsource their engineering or manufacturing? If so, how do they test for quality? What are their quality standards? What about their performance and life testing practices? Is a company representative avail-able who can address technical questions or are email or the company website the only “discussion” options? These are all important questions when researching a pump supplier.

Traveling supplier? Is the supplier open to visiting an OEM’s facility in order to get a first-hand look at an application? Even though technology allows the world to communicate much easier, nothing beats the “up close and personal” care given by an in-person visit.

• Avoid knock-offs: It is very tempting when working with a tight budget to cut corners on components. While there are many reputable pump suppliers that will take care of an OEM’s needs, there are also many suppliers that create “knock-off” pumps, or cheap copies of pumps sold by legitimate pump manufacturers. These companies are able to sell cheap by using less than standard components or work forces that do not hold to any type of quality standards. In the short term, pumps are more affordable; in the long term, one will find problems with consistency, reliability, and quality.

Understanding the need and importance of a pump in an OEM application is the first step in specifying the correct pump. Specifying a pump early and choosing a reputable supplier will have an important impact on the application’s function, life, and reliability. For more information, visit www.sovoflo.com.


Many problems arise when a design includes “space” for a pump but an actual pump has not been specified. Specifying a pump early, rather than later, will assist in the sizing and positioning of a pump and its surrounding space. This promotes pumping efficiency and assists in eliminating costly redesigns.

Understanding your own systems flow and pressure requirements is a starting point to choosing the correct pump. Adding a pump to the system also makes an impact. This is another reason that a pump should be specified early on.

The materials of the pump that come in contact with the pumped fluid are the wetted materials. It is important to understand the material of construction of the pump and it inherent limitations. Are the materials chemically compatible with the fluid being pumped? Can the materials handle the temperature of the pumped fluid?

When looking for a pump supplier, it is important to understand how the company tests for quality and its quality standards. 

Methods for Diaphragm Pump Selection

Part 1: Pressure, Vacuum, and Flow

Pressure and Flow

For most sampling applications, the following information is sufficient in determining the type of pump to select:
♦ Required Vacuum
♦ Required Pressure
♦ Sample point conditions
♦ Required Flow Rate
♦ Temperature and Type of Gas being pumped
♦ Ambient temperature where pump will operate
♦ Distance and diameter of tubing
♦ Voltage, frequency, and classification of motor

Vacuum

If the required vacuum is not known, you will need to calculate the pressure drop from the sample point to the pump inlet. SOVOFLO can perform this calculation. What we need to know is the required flow rate, line distance and diameter, Gas composition and temperature and initial pressure at the sample point.

Pressure

If the sample gas is venting to atmosphere downstream, then only the vacuum needs to be calculated. If the gas is returning to a flare or back to process, then the pump will probably require pressure to get there. Again, SOVOFLO can calculate this – however we will need to know the pressure at the return point.

Reading the Curves

♦ The pump curves we provide are really (2) curves plotted onto (1) graph.
♦ The left side of the zero is inlet vacuum vs. flow rate with the assumption that the outlet discharges to atmospheric pressure (or close to it).
♦ The right side of the zero is outlet pressure versus flow rate with the assumption that the inlet pulls from atmospheric pressure (or close to it).
♦ In applications where the pump is pulling a vacuum and providing discharge pressure; we have another set of curves called “combination curves”.
♦ Please contact SOVOFLO in these cases.

Vacuum Example

♦ If the inlet pressure drop is calculated as 5 InHg at 8 SLPM and the sample vents to atmosphere, then all we need to do is find a pump that will provide ≥ 8 LPM at this vacuum. See below.



Pressure Example

♦ If the pump is located close to the sample point and the downstream pressure required is 5 PSIG @ 6 LPM, then all we need to do is find a pump that will provide ≥ 6 LPM at this pressure. See below.


Pressure and Vacuum Applications

Say an application requires a pump to pull through 200′ of 3/8″ sample line, flow to an analyzer, and then return to a process line 350′ away. In this case, the pump will be required to pull a vacuum on the inlet, provide flow to an analyzer, and provide positive pressure to the process line.
♦ For this we must use what we call “combination curves”.
♦ These curves show a pump’s flow rate at a given vacuum and outlet pressure.

Combination Curve Example

♦ In this case, we need to pull 10 InHg @ 7 LPM to draw the sample, but also provide a discharge pressure of 10 PSIG in order to push the sample back to the process line. See below.


Pressure Boosting Applications

In some cases, the process line may be under positive pressure when it reaches the pump inlet. If the gas sample must then be pushed back to a process line, a pump can be used to “boost” the pressure. When the pump inlet pressure exceeds 0 PSIG, the pump performance capabilities (in terms of discharge pressure and flow rate) can increase significantly. It is very important that under these circumstances specific calculations are done by SOVOFLO to avoid oversizing the pump; which can lead to premature diaphragm, bearing, and motor wear. The information we require in these applications (in addition to gas type and temperature) are pump inlet Pressure (PI) , Pump outlet Pressure (PO), and flow rate.

Warranty Information

SOVOFLO finished products, when properly installed and operated under normal conditions of use, are warranted by SOVOFLO to be free from defects in material and workmanship for a period of twelve (12) months (12 months the pump reference lifetime which above 10000 hours, 6 months the pump reference lifetime above 5000 hours, 3 months the pump reference lifetime above 3000 hours, 1 month the pump reference lifetime under 2000 hours ) from the date of purchase from SOVOFLO or an authorized SOVOFLO Representative or Distributor. In order to obtain performance under this warranty, the buyer must promptly (in no event later than thirty (30) days after discovery of the defect) give written notice of the defect to SOVOFLO Manufacturing, No.16 Dong Di Rd, Dongguan City, Guangdong Province,  China or an authorized Service Center (unless specifically agreed upon in writing signed by both parties or specified in writing as part of a SOVOFLO OEM Quotation). Buyer is responsible for freight charges both to and from SOVOFLO in all cases.

This warranty does not apply to electric motors, electrical controls, and gasoline engines not supplied by SOVOFLO. SOVOFLO's warranties also do not extend to any goods or parts which have been subjected to misuse, lack of maintenance, neglect, damage by accident or transit damage.

This express warranty excludes all other warranties or representations expressed or implied by any literature, data, or person. SOVOFLO's maximum liability under this exclusive remedy shall never exceed the cost of the subject product and SOVOFLO reserves the right, at its sole discretion, to refund the purchase price in lieu of repair or replacement.

SOVOFLO will not be responsible or liable for indirect or consequential damages of any kind, however arising, including but not limited to those for use of any products, loss of time, inconvenience, lost profit, labor charges, or other incidental or consequential damages with respect to persons, business, or property, whether as a result of breach of warranty, negligence or otherwise. Notwithstanding any other provision of this warranty, buyer's remedy against SOVOFLO for goods supplied or for non-delivered goods or failure to furnish goods, whether or not based on negligence, strict liability or breach of express or implied warranty, is limited solely, at SOVOFLO's option, to replacement of or cure of such nonconforming or non-delivered goods or return of the purchase price for such goods and in no event shall exceed the price or charge for such goods. SOVOFLO expressly disclaims any warranty of merchantability or fitness for a particular use or purpose with respect to the goods sold. There are no warranties which extend beyond the descriptions set forth in this warranty, notwithstanding any knowledge of SOVOFLO regarding the use or uses intended to be made of goods, proposed changes or additions to goods, or any assistance or suggestions that may have been made by SOVOFLO personnel.

Unauthorized extensions of warranties by the customer shall remain the customer's responsibility.

Customer is responsible for determining the suitability of SOVOFLO products for customer's use or resale, or for incorporating them into objects or applications which customer designs, assembles, constructs or manufactures.

This warranty can be modified only by authorized SOVOFLO personnel by signing a specific, written description of any modifications.

FAQ&TIPS

FAQ

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.