Benefits; Application Examples - Danfoss APP Series Installation, Operation And Maintenance Manual

Operation guide
1. Introduction
2.

Benefits

3.

Application examples

© Danfoss | 2023.03
Installation, Operation and Maintenance APP 53-92 pumps
The Danfoss range of APP high-pressure pumps
is designed according to EN 809 for use in RO
applications with low viscosity and corrosive
fluids such as sea water.
Danfoss APP pumps are positive displacement
pumps with axial pistons that move a fixed
amount of water in each cycle. Flow is propor-
1 Housing
2 Shaft
3 Swash plate (non drive end)
4 Retainer plate
5 Piston
6 Cylinder barrel
7 Bleeding / drain plug
8 Valve plate
9 Port plate (non drive end)
• Zero risk of lubricant contamination:
- Oil lubricants are replaced with the
pumped medium, water, so there is no
contamination risk from the pump.
• Low maintenance costs:
- Efficient design and all-stainless steel
construction ensure exceptionally long
life. When Danfoss specifications are
met, service intervals of 8,000 hours can
be expected. Service is easy, and can be
carried out on-site due to the simple
design and few parts.
• Low energy costs:
- The highly efficient axial piston design
provides the lowest energy
consumption of any comparable pump
on the market.
• Easy installation:
- The most compact and lightest design
available.
- The pump can be installed horizon-
tally in different positions rotating it
around the shaft (see section 10 for
example).
Danfoss APP pumps are built into a broad range
of RO desalination plants around the world:
• Containerized solutions for hotels, resorts
and residences on islands and in coastal
regions
tional to the number of input shaft revolutions
(rpm).
Unlike centrifugal pumps, they produce the same
flow at a given speed no matter what the
discharge pressure.
The sectional drawing below illustrates the main
components of the APP 53-92 pump range.
10 Center flange
11 Spring cartridge
12 Eye bolt
13 Port plate (drive end)
14 Swash plate (drive end)
15 Shaft seal
16 Motor flange
17 Flushing valve
18 Tail stock screws
No pulsation dampeners necessary due
to extremely low pressure pulsation.
- Powered directly by electric motors or
combustion engines (with special
coupling).
- All pumps are supplied with an
integrated flushing valve that allows the
fluid to flow from inlet to the outlet,
when the pump is not running.
• High reliability:
- All parts are made of high corrosion
resistant materials e.g. Duplex
(EN1.4462/ UNS S31803) and
Super Duplex (EN1.4410/UNS S32750)
stainless steel and carbon reinforced
PEEK.
• Certified quality:
- Available with positive material
idenfication (PMI) certification on
request.
- ISO 9001, ISO 14001, IAFT 16949
- ATEX certification available for APP S (all
Super Duplex) and APP S 674 (API).
Please see relevant data sheets.
• 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
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