Danfoss S81, S121, S188, S251 Data sheet
Data sheet
Gasketed Plate Heat Exchangers (DN 300 / 12”)
S81 / S121 / S188 / S251
Description
SONDEX® gasketed plate heat exchangers are
the ideal choice for a wide range of applications
across numerous market segments.
We have the largest plate portfolio in the
world, and we customize each heat exchanger
to meet your exact requirements. Innovative
technologies and smart design make our
gasketed plate heat exchangers a stellar
investment.
Benefits:
• Individually customized solution that
perfectly matches your requirements and
lowers your energy consumption.
• High performance and a low pressure
drop eliminate unnecessary burdens on
your system and optimize overall system
performance.
• The design results in a compact solution with
a small footprint, simple installation, and easy
access for maintenance.
Common applications:
• HVAC industry
• Marine/offshore industry
• Dairy/food/beverage industry
• Sugar industry
• Biogas industry
• Pulp and paper industry
• Heavy industry
• Mining industry
• Petrochemical industry
• Chemical industry
Main data:
• Min. temperature −10 °C
• Max. temperature 180 °C
• Max. working pressure 16 / 25 bar (10 bar on
request)
• Water and different fluids, steam
• Connection size DN 300 or 12”
Approvals:
• Please contact your local Danfoss/SONDEX®
sales representative for an overview of the
available approvals in your region
Construction standard:
• EN13445 (PED 2014/68/EU)
• ASME sec VIII, Div. 1
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Data sheet S81 / S121 / S188 / S251 (DN 300)
Naming of units
S81-IS16-21-TKTL89
3)
1)
1)
Type of heat exchanger:
TKTL89 - Plate grouping
21 - Number of plates in the heat exchanger
16 - Design pressure of the heat exchanger
IS - Frame type
2)
81 – Type of heat exchanger
S – Gasketed heat exchanger
81 - …
Letter S81 shows type of the attachment of gasket to plate:
e.g. 81 (without A) – SonderLock
81A (with A) – Hang-on
2)
Description of frame types:
There are few different frame types which can be offered for different applications and duties.
IS – with suspension roller,
IG – without suspension roller,
FS – food/sanitary with suspension roller,
FG - food/sanitary,
ST – simple design of frame with threaded connections
3)
Channel grouping:
In this example, the heat exchanger combines TK and TL channels. The share of TL channels equals
89% of the total number of channels.
The number of channels is defined as “the number of plates - 1”.
TK - short thermal length
TM - medium thermal length
TL - long thermal length
Heat exchanger design
Gasketed heat exchangers consist of
Carrying Bar
Plate Pack
Plate
Connections
Head
Flange Connections
Foundation Feet
Column
Follower
Tie Bolt
Guiding Bar
Anatomy of a SONDEX® plate heat exchanger - IS frame.
2 | VD.JQ.R1.02 | 2019.07
Data sheet S81 / S121 / S188 / S251 (DN 300)
To the left: A multi-pass solution with connections
Heat exchanger design
(continued)
Multi-pass design
on the follower and the head.
To the right: A single-pass solution with
all connections on the head.
Connections
The heat exchanger may have connections on
both front and back-end sides of the unit.
Connections on the front-end plate are marked
with F and connections on the back-end plate
are marked with B. The numbers 1, 2, 3 and 4
designate the position of the connection on the
end-plate from the top-left port clockwise.
VD.JQ.R1.02 | 3 | 2019.07
Data sheet S81 / S121 / S188 / S251 (DN 300)
SONDEX®
plate
range
Common
Technical data Heat exchanger S67 / S113 / S155
Typ e S81 S121 S188 S251
Max. working pressure
Max. operating temperature
Min. operating temperature -10
Flow medium Water and different fluids, steam
Volume / channel l 3.1 4.7 7.3 9. 8
Connection size DN 300 / 12”
Connection type
Plate material
Plate thickness mm
Gasket material
Gasket attachment t ype Sonder Lock
Liners in connections
Frame
Frame painting specification Painting available for corrosion categories C2L, C4M, C5M
1)
Not available f or all frame variations
2)
SonderSaf e - double plate
PN
(bar)
°C
• DN 300/12” flanges. Carbon steel, rubberlined or cladded with AISI 316L
(other materials available on request)
Stainless steel EN 1.440 4 (AISI 316L), EN 1.4301 (AISI 304), SMO254, Hastelloy C276,
titanium Gr.1
Other materials available on request
0.4; 0.5; 0.6; 0.7
2 x 0.4 SonderSafe plates
Other thicknesses available on request
NBR, EPDM,
Other materials available on request
• Rubber NBR, EPDM,
• Stainless steel EN 1.440 4 (AISI 316L), EN 1.4301 (AISI 304), SMO254, Hastelloy C276,
titanium Gr.1
• Painted frame, color RAL 5010 (other colors available on request)
• Stainless steel frame, designed for the sanitary applications (e.g. food and dairy
industries)
(10)1), 16, 25
Up to 180
1)
2)
Using the right plate for each individual duty
is very important, as it greatly impacts the
efficiency of the entire installation.
It is important that the length of the plates and
the type of pattern match the requirements of
individual thermal duty.
We have developed a wide plate portfolio to
provide the perfect plate and connection size for
any duty.
No application is too small or too big for us - we
provide the optimal technical solution every
time.
Our extensive SONDEX® plate portfolio
includes plates that lie outside the commonly
manufactured plate sizes to cover all thermal
duties optimally.
plate
range
4 | VD.JQ.R1.02 | 2019.07
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