Flowserve MK25-2 User Manual
GESTRA
GESTRA Steam Systems
MK 25/2
MK 25/2S
Installation Instructions 810706-01
Steam Traps
MK 25 . .., DN 40-50
1
Contents
Page
Important Notes
Usage for the intended purpose ......................................................................................8
Safety note ......................................................................................................................8
Danger ............................................................................................................................ 8
Rating pursuant to article 9 of the PED ...........................................................................8
Explanatory Notes
Scope of supply ..............................................................................................................9
Description ......................................................................................................................9
Function .......................................................................................................................... 9
Technical data .........................................................................................................9 – 10
Corrosion resistance .....................................................................................................11
Sizing ............................................................................................................................ 11
Name plate / marking ....................................................................................................11
Installation
MK 25... .........................................................................................................................12
Design with flanges .......................................................................................................12
Design with screwed-sockets ........................................................................................12
Design with socket-weld ends .......................................................................................12
Design with butt-weld ends ...........................................................................................13
Heat treatment of welds ................................................................................................13
Commissioning
MK 25... .........................................................................................................................13
Operation
MK 25... .........................................................................................................................13
Maintenance
Check steam trap ..........................................................................................................14
Clean / exchange capsule and nozzle seat...................................................................14
Clean / exchange strainer .............................................................................................14
Torques .........................................................................................................................15
Spare Parts
Spare parts list ..............................................................................................................15
Annex
Declaration of conformity .............................................................................................. 16
2
Capacity Chart
4
2
3
1
Fig. 1
MK 25/2: Condensate temperature 10 K (degC)
1
below saturation temperature.
2
MK 25/2: Cold condensate at a temperature of
20 °C (start-up capacity).
3
MK 25/2S: Condensate temperature 10 K
(degC) below saturation temperature.
MK 25/2S: Cold condensate at a temperature
4
of 20 °C (start-up capacity).
3
Design MK 25/2
A
B
C
D
R
E
F
G
H
Fig. 2
4
J
I
Design MK 25/2S
A
B
C
D
R
E
F
Fig. 3
G
H
J
I
5
Check Capsule
Thermostatic capsule
Capsule intact
Fig. 4
D for flat seat nozzle support: 5H2
Capsule defective
≥ 4.4 mm
Fig. 5
MLK
≥ 3.8 mm
Fig. 6
6
N
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