Danfoss APP series User Manual

180R9346 | AQ240486503020en-001702 | 21© Danfoss | 2023.03
Operation guide Installation, Operation and Maintenance APP 53-92 pumps
2. Benets
1. Introduction
• 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:
- Ecient design and all-stainless steel
construction ensure exceptionally long
life. When Danfoss specications 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 ecient 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 dierent positions rotating it
around the shaft (see section 10 for
example).
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 ushing valve that allows the
uid to ow 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.
• Certied quality:
- Available with positive material
idencation (PMI) certication on
request.
- ISO 9001, ISO 14001, IAFT 16949
- ATEX certication available for APP S (all
Super Duplex) and APP S 674 (API).
Please see relevant data sheets.
3. Application examples
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
• Mobile systems for humanitarian and
military organizations
• Onboard systems for ships and yachts
• Oshore platforms for the oil and gas
industry
• Municipal and regional waterworks
The Danfoss range of APP high-pressure pumps
is designed according to EN 809 for use in RO
applications with low viscosity and corrosive
uids such as sea water.
Danfoss APP pumps are positive displacement
pumps with axial pistons that move a xed
amount of water in each cycle. Flow is propor-
tional to the number of input shaft revolutions
(rpm).
Unlike centrifugal pumps, they produce the same
ow 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.
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)
10 Center ange
11 Spring cartridge
12 Eye bolt
13 Port plate (drive end)
14 Swash plate (drive end)
15 Shaft seal
16 Motor ange
17 Flushing valve
18 Tail stock screws

Danfoss APP series Specifications

General

Brand	Danfoss
Model	APP series
Category	Water Pump
Language	English