APP 0.6 - 1.0

Summary

Product Identification

Danfoss APP pumps are a range of high-pressure, positive displacement axial piston pumps designed for Reverse Osmosis (RO) applications. They are suitable for use with low viscosity and corrosive fluids.

Models Covered:

• APP 0.6-1.0
• APP 1.5-3.5
• APP (W) 5.1-10.2
• APP 11-13
• APP 16-22
• APP 21-30
• APP 38-46

Key Features:

• Lubrication: Uses the pumped medium (water) as lubricant, eliminating contamination risk from oil.
• Construction: All-stainless steel construction, utilizing Duplex (EN1.4462/UNS S31803) and Super Duplex (EN1.4410/UNS S32750) stainless steel, and carbon reinforced PEEK for high corrosion resistance.
• Efficiency: Highly efficient axial piston design for low energy consumption.
• Design: Compact and lightweight, can be installed vertically and horizontally.
• Pulsation: Extremely low pressure pulsation, eliminating the need for pulsation dampeners.
• Flushing Valve: All pumps except APP (W) 5.1-10.2 are supplied with an integrated flushing valve, allowing fluid flow from inlet to outlet when the pump is not running.

Certifications:

• Available as ATEX certified (category 2, zone 1 or category 3, zone 2). ATEX certified pumps are indicated by "Ex" in the type designation (e.g., APP 0.6 Ex).
• IATF 16949, ISO 9001, ISO 14001.
• Positive Material Identification (PMI) report available on request.

Application Examples

Danfoss APP pumps are integrated into various RO desalination plants globally, including:

• Containerized solutions for hotels, resorts, and residences.
• Mobile systems for humanitarian and military organizations.
• Onboard systems for ships and yachts.
• Offshore platforms for the oil and gas industry.
• Municipal and regional waterworks.

Suitable Fluids:

• Sea water
• Brackish water
• Waste water (APP W models)

Operating Limits

General Specifications (values vary by specific pump model; see PDF for details):

• Max. Outlet Pressure Continuous: 80 barg (1160 psig) for most models; some APP 11-13, APP 16-22, APP 38-46 models have 70 barg (1015 psig).
• Min. Outlet Pressure: 10 barg (145 psig) or 20 barg (290 psig).
• Inlet Pressure Continuous: Ranges from 0.5 - 5 barg (7.3 - 72.5 psig) to 2.5/3.5 - 5 barg (36.5/50.8 - 72.5 psig), depending on the model.
  • For speeds above 3000 rpm (APP 0.6-1.0, APP 1.5-3.5) or 1500 rpm (APP (W) 5.1-10.2), the pump must be boosted at a pressure of 2-5 barg (29-72.5 psig).
• Max. Inlet Pressure Peak: 5 barg (72.5 psig) or 10 barg (145 psig).
• Min. Speed Continuous: 700 rpm for all models.
• Max. Speed Continuous: Varies by model, ranging from 1200 rpm to 3450 rpm.
• Media Temperature: 2 - 50 °C (35.6 - 122 °F or 36 - 122 °F).
• Ambient Temperature: 0 - 50 °C (32 - 122 °F).

Mechanical / Hydraulic

Geometric Displacement:

• Ranges from 4.07 cm³/rev. (0.25 in³/rev.) for APP 0.6 to 444 cm³/rev. (27.09 in³/rev.) for APP 30/1200, APP 30/1500, APP 38/1500, and APP 46/1780.
• See the official PDF for exact tabulated values for each specific model.

Typical Flow:

• Flow is proportional to the input shaft revolutions (rpm).
• Typical flow values at various rpm (e.g., 1000 rpm, 1500 rpm) and max. pressure are provided in the PDF for each model in m³/h and gpm.
• Flow curves (Flow at different rpm) are available in section 5 of the PDF, measured at 80 barg (1160 psig) for APP 0.6-10.2 and 60 barg (870 psig) for APP 11-46.
• The required rpm can be determined by: Required rpm = (Required flow x Rated rpm) / Rated flow.

Flushing Valve:

• Integrated flushing valves are present on all APP pumps except APP (W) 5.1-10.2.
• Flushing valve flow curves (Flow [l/min] vs. Pressure [barg]) are available in section 6 of the PDF.

Weight (dry):

• Ranges from 5.2 kg (11.5 lb) for APP 0.6-1.0 to 105 kg (231 lb) for APP 21-46 models.
• See the official PDF for exact tabulated values for each specific model.

Footprint with IEC Motor:

• Ranges from 0.1 m² (1.08 foot²) for APP 0.6-0.8 to 1.10 m² (11.84 foot²) for APP 46/1780.
• See the official PDF for exact tabulated values for each specific model.

Electrical

Motor Requirements:

• Required power can be determined using the following guiding equations:
  • Required power [kW] = (l/min x barg) / Calc. factor
  • Required power [kW] = (16.7 x m³/h x barg) / Calc. factor
  • Required power [hp] = (0.35 x gpm x psig) / Calc. factor
• Calculation factors are provided in tables for each pump model and rpm in section 7 of the PDF.
• Typical motor sizes (kW/HP) at max. speed and max. pressure are listed for each pump model.
• See the official PDF for exact tabulated values for each specific model.

Torque at Max. Outlet Pressure:

• Ranges from 5.8 Nm (4.2 lbf-ft) for APP 0.6 to 617 Nm (455 lbf-ft) for APP 38/1500.
• See the official PDF for exact tabulated values for each specific model.

Feed Water

Filtration:

• Proper filtration is crucial.
• Main filter must have a filtration efficiency of 99.98% at 10 µm.
• Precision depth filter cartridges rated 10µm abs. ß10≥5000 are strongly recommended.
• Bag filters or string-wound filter cartridges are not recommended due to lower efficiency.
• Thoroughly clean pipes and flush the system prior to start-up.

Corrosion Resistance:

• The APP water pump is made of Duplex and Super Duplex stainless steel.
• If the water pump is operated above the Duplex line (refer to the NaCl vs. temperature chart in the PDF), flush the water pump with fresh water at operation stop to minimize the risk of crevice corrosion.

Installation

• Mounting: The pump can be installed vertically and horizontally. Do not add any axial or radial loads to the pump shaft.
• Noise: The overall noise level is influenced by pump speed, discharge pressure, mounting, connections, and Variable Frequency Drives (VFDs).
  • To minimize vibrations and noise, mount the pump unit correctly on a frame with anti-vibration dampeners and use flexible hoses instead of metal pipes where possible.
• RO System with Direct Supply Recommendations:
  • Inlet line: Dimension for minimum pressure loss (large flow, minimum pipe length, minimum bends/connections, low-loss fittings).
  • Inlet filter: Install in front of the APP pump; refer to filtration guidelines.
  • Low pressure relief valve: Install to avoid system or pump damage if the pump stops momentarily or spins backward.
  • Monitoring pressure switch: Install between the filter and pump inlet to prevent operation if inlet pressure is below minimum specifications.
  • Hoses: Use flexible hoses to minimize vibrations and noise.
  • Inlet pressure: Maintain according to specifications to eliminate cavitation risk.
  • Flushing valve: Integrated in most APP pumps for easy system filling and flushing.
  • Non-return valve: Can be installed in the outlet to avoid pump backspin.
  • High pressure safety or relief valve: Install after the non-return valve to prevent system damage and high-pressure peaks, as APP pumps create pressure and flow immediately upon start-up.

Dimensions and Connections

Detailed dimensional drawings and connection information for each APP pump model and for pump units with motors are available in sections 10 and 11 of the official PDF.

Accessories

Accessories are available for various APP models. Please refer to section 12 of the official PDF for details.

Disclaimer

This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the official OEM PDF datasheet. For contractual data and complete specifications, always refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

Lenntech datasheet mirror