Introduction
The HNDP50 2" industrial petrochemical AODD pump delivers a maximum flow rate of 145 GPM (548.8 LPM). It supports flexible configurations of various wetted materials and port sizes to enable customized solutions for different media characteristics and working conditions, offering excellent universality and adaptability. It efficiently performs full-process operations including medium transfer, filling, circulation and batching, fully meeting production requirements in petrochemical, general industrial, and wastewater treatment scenarios. Constructed with premium non-metallic materials, the pump features outstanding high and low temperature resistance and reliable dry-run performance, ensuring stable operation under various extreme working conditions without failures caused by no-load operation or temperature fluctuations. Designed as a diaphragm pump for confined space operation, it adopts a compact and space-saving structure with flexible installation methods, perfectly adapting to restricted working scenarios such as tank interiors, equipment interlayers, narrow workshops and enclosed cabins.
Performance Curve


Product Description
|
Ratio |
1:1 |
|
Maximum Flow Rate |
145 g.p.m. (548.8 l.p.m.) |
|
Displacement per Cycle |
0.72 gal (2.7 L) |
|
Air Inlet (Female Thread) |
1/2 - 14 N.P.T.- 1 |
|
Liquid Inlet/Outlet |
2" A.N.S.I./DIN Flange |
|
Maximum Operating Pressure |
120 psi (8.3 bar) |
|
Maximum Suspended Solids Passage |
1/4" (6.4 mm) |
|
Weight lbs (kg) |
PP: 62 (28.1) PVDF: 92 (41.7) |
|
Maximum Dry Lift |
14 ft (4.27 m) |
|
Noise Level |
77.7 db(A) at 70 PSI, 60 Cycles per Minute |
Advantages and Features
1. Manufactured with non-metallic materials, the HNDP50 industrial petrochemical AODD pump delivers excellent high and low temperature resistance, adapting to extreme working conditions with alternating and fluctuating temperatures. It also features superior chemical corrosion resistance to withstand erosion from various chemical media and wastewater, effectively preventing leakage and component damage during long-term operation.
2. As a diaphragm pump for confined space operation adopts a compact and space-saving structure with flexible and diverse installation methods. Its simple structure allows easy disassembly and assembly without complicated procedures or professional tools, enabling time-saving and labor-efficient daily maintenance.
3. The HNDP50 pneumatic diaphragm pump supports flexible selection of various wetted materials and port sizes, allowing personalized customization according to the corrosiveness, viscosity and impurity content of conveyed media as well as on-site working conditions and production processes to meet diverse special medium transportation requirements. Equipped with mature dry-run technology, it supports long-term no-load and standby operation with high working condition fault tolerance.
Complete System Installation Schematic
1. Air Source Treatment Unit
Filter Regulator ②: Filters impurities and moisture in compressed air first, then regulates and stabilizes the air pressure supplied to the pump.
Dryer ③: Further removes moisture from compressed air to prevent water vapor from entering the pump chamber and causing internal component corrosion and icing.
Lubricator ④: Atomizes lubricating oil and mixes it into compressed air to lubricate moving parts such as pneumatic valves and diaphragms of the pump and reduce wear.
Supporting components: Air Inlet, Check Valve, Shut-Off Valve.
2. Pump Body and Exhaust System
Pump Body: The core pneumatic diaphragm pump, which drives the diaphragm to move back and forth via compressed air to realize fluid suction and discharge.
Muffler: Installed at the pump exhaust port to reduce exhaust noise.
Piped Exhaust: Discharges waste gas to a safe area to avoid workshop environmental pollution.
Flexible Connection: A flexible connection between the pump and the air source treatment unit to buffer vibration and reduce stress transmission.
3. Fluid Suction Pipeline (Left Side of the Figure)
Suction: The starting point for fluid entering the system, connected to upstream liquid storage tanks or pipelines.
Shut-Off Valve: Cuts off fluid suction for convenient pump maintenance.
Compound Gauge: Monitors suction-side pressure to identify issues such as insufficient suction lift and pipeline blockage.
Flexible Connector: Absorbs pump vibration and prevents stress damage caused by rigid pipeline connection.
Drain Port: Drains residual liquid in the suction pipeline for maintenance or pipeline emptying.
Pipe Connection: Multiple connection types are optional to adapt to on-site pipeline conditions.
4. Fluid Discharge Pipeline (Right Side of the Figure)
Flexible Connector: Buffers pump vibration to protect pipelines and equipment.
Pipe Connection: Consistent with the suction end, adaptable to on-site pipelines.
Drain Port: Drains residual liquid in the discharge pipeline for maintenance and emptying.
Surge Suppressor ①: Stabilizes the pulsating discharge pressure of pneumatic diaphragm pumps and protects pipelines and downstream equipment, serving as a key accessory on the discharge side.
Pressure Gauge: Monitors discharge-side pressure to judge the operating status of the pump.
Shut-Off Valve: Cuts off fluid discharge to facilitate maintenance of the pump and downstream equipment.
Discharge: The terminal outlet of the system, connected to downstream pipelines and equipment.
Unregulated Air Supply to Surge Suppressor: Directly supplies unregulated compressed air to the surge suppressor, utilizing the compressibility of gas to absorb fluid pulsation.

Applications
● Petrochemical Industry
Suitable for complex working conditions in petrochemical and fine chemical production, it can stably transport corrosive chemical raw materials, additives, solvents, and viscous chemical fluids. As an industrial petrochemical AODD pump, the HNDP50 features excellent high and low temperature resistance and outstanding anti-corrosion performance, enabling it to handle extreme factory environments with drastic temperature fluctuations and highly corrosive media. It supports dry running and intermittent start-stop operation, covering full-process operations such as chemical material transportation, tank circulation, quantitative batching and filling.
● Sewage / Wastewater Treatment Industry
Widely applied in municipal sewage, industrial wastewater, chemical sewage and impurity-containing water treatment scenarios, it efficiently completes sewage transportation, chemical dosing, water circulation and sedimentation tank liquid delivery. Built with non-metallic materials, the HNDP50 pneumatic diaphragm pump effectively resists corrosion from acid and alkaline wastewater and prevents equipment aging and leakage, adapting to complex, corrosive and impurity-rich water media. With high operational fault tolerance, it perfectly matches the intermittent start-stop and irregular feeding modes of water treatment systems, delivering easy maintenance and strong versatility.
● General Industrial Field
Ideal for various general industrial scenarios, it stably transports industrial cleaning agents, cutting fluids, additives, weakly corrosive fluids and medium-to-low viscosity materials to support conventional processes such as material transfer, pipeline circulation, batching and equipment liquid supply. The HNDP50 diaphragm pump for confined space operation supports customizable wetted materials to suit different medium characteristics. It provides high-flow efficient delivery with stable and jitter-free operation, fully adapting to standardized and mass-production industrial workflows.
FAQ
Q: Water treatment operations usually involve irregular start-stop cycles and no-load conditions. Will the pump jam or burn out under no-load operation?
A: Equipped with mature dry-run technology, the HNDP50diaphragm pump for confined space operation supports long-term no-load standby and intermittent start-stop operation without jamming, burnout or core component damage. It features high fault tolerance to adapt to intermittent water treatment working modes and ensures stable and continuous operation without manual attendance.
Q: Do you provide customized pumping solutions?
A: Yes, we offer fully customized pumping solutions tailored to your specific process requirements. Our professional engineering team will communicate in depth with you to optimize the whole configuration, including pump model selection, wetted material matching, flow and pressure parameters, and supporting accessories such as pulsation dampers, flow meters and control systems. Custom modifications for special working conditions are also available to ensure the equipment fully meets your production demands.
Q: Where to buy the HNDP50 industrial petrochemical AODD pump?
A: You may contact our sales team via the email juicy@sxhono.com.cn to obtain product specifications, quotations and selection recommendations. If you have special application requirements, we can also provide you with customized fluid transfer solutions.
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