![background image](http://html1.mh-extra.com/html/danfoss/app-s-674-series/app-s-674-series_installation-operation-and-maintenance-manual_3604172021.webp)
21
180R9270 / IOM APP S 674 - v01 / 03.2013
Data sheet
APP S 674 pumps
2
521B1187 / DKCFN.PD.014.H2.02 / 03.2013
1.
Introduction
2.
Benefits
3.
Application areas
4.
Technical data
4.1
APP S 674 3.0-3.5
4.2
APP S 674 5.1-9.0
4.3
APP S 674 21-38
5.
Flow
5.1
APP S 674 3.0-3.5 flow curves at max pressure
5.2
APP S 674 5.1-9.0 flow curves at max pressure
5.3
APP S 674 21-38 flow curves at max pressure
5.4
Flushing valve characteristics
5.4.1
APP S 674 3.0-3.5 integrated flushing valve curve
5.4.2
APP S 674 5.1-9.0 integrated flushing valve curve
5.4.3
APP S 674 21-38 integrated flushing valve curve
6.
Corrosion
7.
Motor requirements
8.
Installation
8.1
Filtration
8.2
Noise
8.2.1
APP S 674 3.0-3.5 pump mounted on motor 5.5 kW 4-pole / 11 kW 2-pole
8.2.2
APP S 674 5.1-9.0 pump mounted on motor 22 kW 4-pole
8.2.3
APP S 674 21-38 pump mounted on motor 75 kW 4-pole
8.3
Open system design
8.4
RO system with APP S 674 pump
9.
Dimensions and connections
9.1
APP S 674 3.0-3.5
9.2
APP S 674 5.1-9.0
9.3
APP S 674 21-38
10.
Service
10.1
Warranty
10.2
Maintenance
Our CLP RO pumps have changed name as listed below:
CLP674 050-058 RO will now be called APP S 674 3.0-3.5
CLP674 085-152 RO will now be called APP S 674 5.1-9.0
CLP674 365-640 RO will now be called APP S 674 21-38
This is ONLY a name change.
Table of Contents
Data sheet APP S 674 pumps
APP S 674 3.0-3.5
APP S 674 5.1-9.0
APP S 674 21-38
(521B1187)
Data sheet
APP S 674 pumps
3
521B1187 / DKCFN.PD.014.H2.02 / 03.2013
•
Zero risk of lubricant contamination:
Oil lubricants are replaced with the
pumped medium, seawater or brackish
water, so SWRO and BWRO applications are
completely free of any contamination risk
from the pump.
•
Low maintenance costs:
Efficient design and all Super Duplex
stainless steel construction ensure
exceptionally long life. When Danfoss
specifications are met, service intervals up
to 8,000 hours can be expected.
•
Low energy costs:
The highly efficient axial piston design
provides the lowest power consumption of
any comparable pump on the market.
•
Easy configuration:
-
The lightest and most compact design
available. Pump can be installed
vertically and horizontally.
-
No pulsation dampeners necessary due
to extremely “low pressure” pulsation.
-
Powered direct by electric motor or
combustion engine.
-
Pump can be delivered with all types of
flange connections.
•
Certified quality:
-
Pump is designed according to API 674,
3
rd
edition.
-
Super Duplex stainless steel M-630 from
NORSOK M-650 certified foundries.
-
Full traceability and material certifi-
cates on pressure containing parts.
-
Pump available as ATEX certified,
category 2, zone 1 or category 3, zone 2.
2.
Benefits
APP S 674 pumps are made according to API 674,
3
rd
edition. The pump is designed to supply low
viscosity and corrosive fluids under high
pressure, e.g. in seawater reverse osmosis
applications.
Danfoss APP S 674 pumps are positive displace-
ment pumps, with axial pistons, that move a
fixed amount of water in each cycle. Flow is
proportional to the number of pump shaft
revolutions (rpm). Unlike centrifugal pumps, they
produce the same flow at a given speed no
matter what the discharge pressure.
The pumps are supplied with an integrated
flushing valve that allows the saltwater to flow
from inlet to the outlet, when the pump is not
running.
The pumps are made for flange connections.
All parts included in the pumps are designed to
provide long service life, i.e. long service life with
a constantly high efficiency and minimum
service required.
1.
Introduction
1:
Shaft sealing
2:
Port flange
3:
Bleeding plug
4:
Retainer plate
5:
Piston/shoe
6:
Valve plate
7:
Swash plate
8:
Cylinder barrel
9:
Springs
10:
Port plate
11:
Flushing valve
12:
Housing
13:
Tail stock screws
14:
Drain plug
The pumps are used in RO systems for produc-
tion of fresh water. This water can be used for
drinking or as technical water used for NOx
reduction in gas turbines or as water used for
injection into wells.
APP S 674 pumps are not only applicable for
offshore applications but can also be used on
refineries or in processes where API 674 is
required.
As the APP S 674 pumps are made in Super
Duplex stainless steel, it makes them suitable for
rough offshore applications. Apart from that the
small and compact pumps are a perfect choice
for applications where component size really
matters.
3.
Application areas