Product Overview and Core Technology

　　The Danfoss PAHT G50-90 is a high-performance high pressure water pump that belongs to Danfoss's PAHT G series,renowned for its robust design and exceptional reliability in handling ultra-pure water and other challenging media.This pump is specifically engineered as an axial piston pump,utilizing a swashplate design to convert rotational motion into axial piston movement,thereby generating high pressure with remarkable efficiency.Its primary design purpose is to provide a clean,oil-free pumping solution for applications where contamination is not an option,leveraging the pumped medium itself for lubrication.With a capability to deliver flows up to 138 L/min and withstand maximum outlet pressures of 160 bar(2320 psig),this series is a cornerstone in industries ranging from water treatment to gas turbine support systems.

　　Technical Specifications and Performance Data

　　The Danfoss PAHT G50-90 series is defined by a set of impressive technical parameters that underscore its capability for demanding industrial service.The pumps can achieve a maximum flow rate of 138 liters per minute(approximately 36.5 gallons per minute)and are rated for a continuous maximum outlet pressure of 160 bar(2320 psig).They operate effectively within a speed range of 700 to 1800 revolutions per minute,with a recommended minimum continuous speed of 1000 rpm for stable operation.

　　Constructed with a housing made from corrosion-resistant AISI 316 stainless steel,the pump is built to last in harsh environments.The sealing material is NBR(Nitrile Butadiene Rubber),which offers good resistance to water and a range of temperatures.The pump features BSPP threaded connections,with a 1 1/2-inch inlet and a 1-inch outlet,ensuring standardized and secure integration into piping systems.It is designed to handle fluid temperatures between 2°C and 50°C(36°F to 122°F)and can function in ambient temperatures from 0°C to 50°C(32°F to 122°F).Furthermore,its operation is relatively quiet,with a sound pressure level of 86 dB(A).

　　Design Features and Construction Details

　　Robust Material Selection and Corrosion Resistance

　　The longevity and reliability of the PAHT G50-90 pump are rooted in its extensive use of AISI 316 stainless steel for its valve body and other wetted parts.This material provides superior resistance to corrosion,pitting,and crevice corrosion,especially when compared to standard stainless steels like AISI 304,making it ideal for use with aggressive media such as seawater,brackish water,and ultra-pure water.This choice of material effectively extends the pump's service life in demanding applications and reduces the risk of product contamination.

　　Oil-Free Operation and Ultra-Clean Technology

　　A defining characteristic of this axial piston pump is its oil-free operation.Unlike conventional hydraulic piston pumps that require oil for lubrication,the PAHT G50-90 uses the pumped water itself to lubricate its moving parts.This innovative"Ultra-Clean Technology"completely eliminates the risk of oil contamination in the process fluid,which is a critical requirement in industries like semiconductor manufacturing,food and beverage,and pharmaceuticals.This design also simplifies maintenance by removing the need to monitor and change lubricating oil.

　　Compact Design and Serviceability

　　Despite its high-power output,the pump is designed to be compact and lightweight,allowing for flexible horizontal or vertical installation.This feature is invaluable in space-constrained applications like offshore platforms or containerized systems.Moreover,the pump is designed for serviceability,with available spare parts for the entire PAHT G 50-90 range,facilitating repairs and minimizing downtime.The design emphasizes fewer moving parts,which contributes to its extended service intervals of up to 8,000 hours under proper operating conditions.

　　Primary Application Areas and Industry Solutions

　　The PAHT G50-90 high pressure water pump finds its niche in several critical industrial sectors where reliability and fluid purity are paramount.In water treatment and desalination,it is employed in high-pressure reverse osmosis(RO)systems for seawater and brackish water desalination,as well as in zero liquid discharge(ZLD)and minimal liquid discharge(MLD)processes,where its high pressure and corrosion resistance are essential.

　　Another key application is in gas turbine inlet conditioning,where the pump is used for inlet air fogging and wet compression.This process increases the density and mass flow of air entering the turbine,significantly boosting its power output and efficiency,especially in hot and dry climates.The pump's ability to handle water at high pressures makes it perfectly suited for creating the fine mist required for this application.

　　Furthermore,its oil-free design makes it suitable for various industrial cleaning and precision manufacturing tasks.It is used in high-pressure cleaning systems and is critical in the manufacturing of electronic components,such as LCD and LED displays,where any contamination from lubricants would be catastrophic.

　　Operational Advantages and Economic Benefits

　　Enhanced Energy Efficiency and Low TCO

　　The axial piston pump design of the PAHT G50-90 is inherently efficient,leading to lower energy consumption and reduced CO2 emissions compared to other pump technologies.Its high volumetric and mechanical efficiency ensures that a greater proportion of input power is converted into useful hydraulic work.This efficiency,combined with low maintenance needs and long service life,contributes to a low Total Cost of Ownership(TCO),making it an economically sound investment over its lifecycle.

　　High Reliability and Minimal Maintenance

　　The pump's robust construction and oil-free operation translate into exceptional reliability and reduced maintenance requirements.With service intervals that can extend to 8,000 hours of operation,the frequency of disruptive maintenance events is significantly reduced.This high reliability ensures greater uptime for critical processes,while the simplicity of its design makes any required maintenance more straightforward to perform.

　　Compliance and Certification

　　The PAHT G50-90 series is CE certified,affirming its compliance with European health,safety,and environmental protection standards.While the standard model is not ATEX compliant for explosive atmospheres,the PAHT G series,in general,offers models that are ATEX certified,allowing for deployment in hazardous areas where such conditions may exist.This makes it a versatile choice for a wide range of industrial settings.

　　Frequently Asked Questions(FAQs)

　　1.Is the Danfoss PAHT G50-90 pump a hydraulic pump?

　　While it operates on the axial piston principle common to many hydraulic pumps,the PAHT G50-90 is specifically designed as a high-pressure water pump.The critical distinction is that it is engineered to use the pumped water for lubrication,unlike traditional hydraulic pumps that require oil.This makes it unsuitable for standard hydraulic oil power transmission systems but ideal for applications requiring clean,oil-free water output.

　　2.What makes this pump suitable for handling ultra-pure water?

　　The pump's suitability for ultra-pure water stems from its oil-free design and use of corrosion-resistant materials.By eliminating lubricating oil,it removes a major potential source of contamination.Furthermore,the wetted components made from AISI 316 stainless steel prevent corrosion that could introduce metallic ions into the ultra-pure water,ensuring the fluid's integrity is maintained throughout the pumping process.

　　3.For what applications would this pump be a better choice than a multi-stage centrifugal pump?

　　This axial piston pump is a superior choice in applications requiring high pressure at a relatively low flow or where the supply pressure can vary.Unlike multi-stage centrifugal pumps whose flow rate is heavily dependent on discharge pressure,the positive displacement design of the PAHT G50-90 delivers a more constant flow regardless of pressure,offers higher efficiency at these operating points,and provides a more compact and lightweight solution.

　　4.What are the critical installation requirements for this pump?

　　Proper installation requires attention to inlet pressure conditions.The pump requires a continuous inlet pressure between 0 and 6 barg(0-87 psig),with a peak inlet pressure not exceeding 20 barg(290 psig).Adequate filtration upstream of the pump is also crucial to protect its precision components from particulate damage.The pump can be installed either horizontally or vertically,offering flexibility in system layout.

　　5.How does the axial piston design contribute to energy savings?

　　The axial piston design is a type of positive displacement pump,which is inherently more efficient at generating high pressure than dynamic pumps like centrifugals.The swashplate-controlled pistons provide precise metering of fluid with minimal internal leakage(high volumetric efficiency).This precise operation reduces energy losses,meaning more of the motor's input power is converted directly into hydraulic power,leading to lower operational costs and reduced energy consumption.