Sanitary pumps are specialized equipment used to pump hygienic liquids and slurries through industrial processing pipeline systems. A sanitary pump is a critical agent in the transportation of products meant for human consumption or contact, such as pharmaceuticals, dairy products, beverages, food, cosmetics, food additives, fine chemicals, and so on.
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Sanitary Rotary Lobe PumpDonjoy Sanitary Lobe Pump is a form of positive displacement pump. It is composed of a rotating rotor and a stationary pump body. It has no suction and discharge valves. It changes the working volume -
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Donjoy Sanitary SCLX Centrifugal PumpA full stainless steel centrifugal pump is a type of pump that is made entirely of stainless steel, including the impeller, casing, and other components. This makes it highly resistant to corrosion -
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Sanitary Stainless Steel Lobe PumpA stainless steel lobe pump is a type of positive displacement pump that is used to transfer viscous and shear-sensitive liquids such as creams, gels, and pastes. It is made of stainless steel -
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Donjoy Sanitary Full Stainless Steel Lobe PumpDonjoy Sanitary SLX Lobe Pump is a form of positive displacement pump. It is composed of a rotating rotor and a stationary pump body. It has no suction and discharge valves. It changes the working -
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Donjoy Sanitary DLX Multi Stage Centrifugal PumpThe DLX series centrifugal pump is multi-stage impeller centrifugal pump with a high clean, high efficiency, high lift and economical delivery pump. The highest lift is up to 280 m (28 bar) and the -
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Donjoy Sanitary BS Centrifugal PumpDJ-BS series is closed impeller centrifugal pump with simple internal structure and pressure-balanced design. It is suitable for various liquid transportation industries such as food and beverage, -
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The advantages of a hygienic pump allow safe and reliable use within the most critical production sectors. The main advantages are as follows:
Mechanically polished steel materials: they ensure constant hygiene and cleanliness, allow fluids to flow in a suitable manner avoiding accumulation, and are certified according to the main sanitary regulations.
Application versatility: The design features of these pumps allow use within a variety of sectors: food, beverage, chemical, pharmaceutical and trichological industries.
Ease of maintenance: The special design features allow savings on maintenance activities. hygienic pumps are equipped with a patented pneumatic anti-stall exchanger that provides superior performance with reduced consumption and makes maintenance operations easier.
Safety in transporting fluids: The pumps are suitable for transporting a high type of fluids. The presence of special eccentric valves, provided in hygienic pumps, allows the passage of suspended solid elements within the fluids.
Sanitary certifications: Hygienic pumps are usually certified according to the main industry regulations: FDA, 3A and MOCA.
Readiness for sanitation activities: The pumps are equipped with a rapid emptying system that makes them suitable for all Clean in Place processes normally handled within this type of plant.
What Are the Different Types of Sanitary Pumps?
Sanitary pumps come in many styles and sizes, so it's important to choose the right one for your specific application.
In order to determine the right pump for your needs, a pump curve is helpful. It's a graphical representation of how a sanitary pump will operate under different conditions. Let's look at the types of sanitary pumps.
Centrifugal Pumps
Centrifugal pumps incorporate an impeller that rotates within an enclosed casing. This type of pump utilizes centrifugal force to generate suction, propelling fluids through a tube at high speed.
These pumps find application in food and beverage processing due to their cost-effectiveness and capacity to offer high flow rates with minimal maintenance.
Sanitary Fittings has a sanitary pump selection that's applicable in the dairy, food, beverage, pharmaceutical, and other sanitary industries.
Centrifugal pumps are suitable for pumping liquids with low to medium viscosity. They can handle a wide range of liquids, such as water, milk, beer, and cough syrup, making them suitable for a wide range of products.
Positive Displacement (PD) Pumps
Positive displacement (PD) pumps move contents by first trapping a certain amount, then forcing it into the discharge pipe after a while. These types of pumps provide a constant flow regardless of the pressure, making them suitable for processes that require precise flow control.
They use rotating gears or pistons to transfer the product at lower flow rates than centrifugal pumps, meaning they can handle thick liquids like chocolate better.
Examples of positive displacement pumps are:
Piston pumps
Diaphragm pumps
Rotary lobe pumps
Peristaltic (hose) pumps
Progressive cavity (PC) pumps
Gear pumps
Air-Operated Double Diaphragm Pumps
Air-operated Diaphragm (AODD) pumps use compressed air as the power source. The compressed air is moved from one diaphragm to the next.
The back-and-forth motion ensures that as the substance is leaving one diaphragm into the discharge pipe, the other diaphragm is simultaneously being filled with the substance.
These pumps can transfer most types of liquids, from those with very thin viscosities to highly viscous ones, such as slurries. They can also handle abrasive and corrosive fluids such as ammonia and sulphuric acid.
AODD pumps are self-priming, meaning they can automatically draw fluid into the pump without external assistance.
They're also portable and, therefore, best for mobile setups, thanks to their design that uses air. This makes them suitable for temporary use in places such as construction and mining sites.
Application Criteria to Choose the Best Sanitary Pump
Pump specialists will obtain as many application criteria as possible and rely on various analytical tools to choose the best type of sanitary pumps and process equipment for ultraclean, high-purity applications. Sanitary centrifugal pumps are a popular choice for transferring lower-viscosity fluids, although choosing the right type of pump is only part of the process. Other factors include selecting the right size of pump, the correct seals, elastomers, and rotors.
Some of the most important considerations when choosing sanitary pumps include:
Pump size - Pump specialists can help you choose the optimum pump size for the most efficient and safe fluid transfer process.
Discharge pressure - This is a critical factor when choosing the right size of centrifugal pumps as well as positive displacement pumps and must be considered when choosing pump horsepower requirements.
Cleanability - The cleaning process is important, whether a cleaning in place (CIP) or cleaning out of place (COP) method is chosen.
Seal maintenance - CIP cleanability can improve process line operating time as well as utilizing pumps with front loaded product seals to reduce and simplify the seal replacement time.
Seal requirements - Requirements for single or double mechanical seals, elastomers, and materials are an important consideration based on application requirements, including temperature and fluid properties.
Material composition - The metal composition of sanitary pumps is a critical decision, particularly in food processing applications which are regulated by government agencies.
Application requirements - Understanding the application requirements is important to choose the right type of pump, where pressure and flow rate can be very different from one part of the process to another, such as a filling application compared to transferring fluid from one tank to another.
Fluid properties - It is important to know the properties of the fluids to be transferred as various fluids require different types of seals and elastomers and have different pressures that can affect the suction and ability for reliable pumping. Some fluids may be abrasive or sticky, and this is important information to know ahead of time as it can affect the seal material chosen and determine if a seal flush is required.
Fluid viscosity - The viscosity of each fluid being pumped is a critical factor as highly viscous fluids will not pump as well with a centrifugal pump and may need to be addressed with a positive displacement pump. Viscosity is a critical factor when determining friction loss.
Temperature - The temperature for both the process and cleaning methods is an important consideration, as high temperatures can affect a liquid's vapor pressure and suction. Temperature can also affect sump pump components that may expand under heat.
Specific gravity/density - Fluid density and specific gravity play a role in choosing the right pump size and determining horsepower requirements.
There are numerous applications that require sanitary pumps to meet specific hygienic standards. They are commonly used in industries such as food and beverage, chemical processing, dairy, pharmaceuticals, brewing, and distilling. Each application may call for specific hygienic pump specifications.
A well-maintained sanitary pump should provide reliable performance for many years. Maintenance can be minimal as the hygienic nature of the pump design and materials are intended to keep the system clean inside. However, they do need to be properly cleaned. items must be monitored and replaced, and must be operated within the recommended specifications to minimize the risk of failure, damage, and other performance problems.
Here are some of the key steps you need to take as part of your sanitary pump maintenance program:
Contamination Avoidance
Avoiding contamination is a critical issue with hygienic pumps. You cannot allow foreign materials to invade the pump system and compromise the materials being processed. Miscellaneous debris, organic material, and other contaminants can cause significant problems. All points of the pump system (including upstream sources and downstream production lines) must be regularly inspected and monitored. Any issues should be addressed immediately to prevent the risk of contamination at any point in the pumping process.
System Monitoring
Monitoring your pump system goes well beyond just contamination avoidance. It must be monitored regularly in case there are any changes in the operating conditions. Key items to look for are pressure, flow rates, vibrations, and temperature. Note if there are changes in these indicators (especially if the materials flowing through the pump system aren't changing in terms of viscosity). Take the necessary steps to solve any problems as early as possible to prevent major concerns within your hygienic pump system. Stay within the specified tolerances and resolve any notable deviations immediately.
Leak Repair
Leaking should always be a concern for a sanitary pump operator and should be detected quickly and repaired as necessary. The common issue here is a shaft seal that needs replacing, though costly leaks can happen at any point along the line. Recurring mechanical seal leaks are often a sign that the seal cannot handle the application. A good resolution is to upgrade to a more robust seal solution that is specifically designed for your process material and operating requirements. This will help prevent further leakage issues.
Pump Cleaning
Most sanitary pump equipment has specific recommendations when it comes to cleaning, and the process may be more customized based on your application. Some may only require hot water or steam while others may require a specific cleaning solution. It is imperative to clean the pump system properly and make it a key part of your overall maintenance schedule.
Pump Alignment
Most sanitary pumps have a two-piece design with a pump head connected to a gearbox. Misalignment can happen over time and cause excess damage to the equipment. Check the pump alignment regularly and adjust when needed.
Lubrication Management
Proper lubrication is vital in all machinery, especially pump equipment. Make sure all bearings, motors, and other lubricated components are inspected often. Reapply or replace lubrication when necessary to keep everything running smoothly.
Preventative Problem-Solving
A good sanitary pump operator will know when something isn't right. They can sense problems before they happen. They are in tune with their equipment and take note of any unusual sounds, smells, vibrations, or changes in operating conditions. Keep your operators properly trained and empower them to take action when they notice anything strange. The right proactivity can help keep a minor issue from turning into a major problem.
Spare Parts
It is always smart to keep spare parts on hand, especially components that tend to wear out quicker than others. Have spare bearings, seals, and other parts ready in case they need to be replaced sooner than expected. Nothing is worse than having extended downtime while you wait for new parts to be shipped. The current supply chain issues are no joke, so don't be left empty-handed!
Preventative Maintenance Plan
Most importantly, ensure you have a consistent and thorough preventative maintenance plan for your sanitary pump system. Know the regular steps that need to be taken and when. Take care of the necessary maintenance procedures while also monitoring and addressing potential problems as they occur. This is how you keep your hygienic pump equipment running at its best at all times.
Our Factory
For many years, as a leader in the pump and valve industry, Donjoy has been adhering to the tradition of excellent innovation and maintaining excellent quality. The products manufactured by Donjoy comply with a series of international standards and specifications such as ASMEBPE, EHEDG, FDA, 3A, etc., and have passed the EU Pressure Equipment Directive (PED-97 / 23 / EC) and (MD-06) implemented by the German TüV agency. / 42 / EC) certification, 3-A sanitary standard certification implemented by the US 3A agency, EU ATEX explosion-proof certification, China Safety Valve Special Manufacturing Equipment (TS) license and China Quality Certification Center GB / T 19001-2016 / ISO 9001: 2015 quality management system certification and many other international authority certifications.
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