Bellows Trap SM6
Overview
Bellows Trap
The main acting unit of bellows,which is filled with a ytpe of liquid with gasification temperature lower than water's saturation temperature.When the device just starts,there appears condensate with low temperature in conduits and the liquid in the bellows is in the condensed state.The trap is turned on.When the temperature of condensate water gradually goes up,the liquid in the bellows begins to vaporize and the pressure within it increases.Consequently,the film drives the valve core to move towards the closing direction.Before the condensate water reaches its saturation temperature,the trap is completely shut down.The bellows controls the opening and closing of valves in accordance with steam temperature changes so as to resist steam and discharge water.Available are two alternative bellows with opening temperature 15℃ or 30℃ lower than saturation temperature.
There is high temperature condensate in front of the Bellows Trap (steam pressure balance type) when it works, and there is no steam leakage, so the energy saving effect is significant.
Bellows trap,among all existing steam pipes,are presently the ideal substitute of low-pressure (with pressure below PN25)hot motive (disc)traps or bimetallic elements traps (with pressure below PN16).
1.Quick acting speed and zero leakage.
2.Simple structure and convenient maintenance.
3.All components made of alloy-treated stainless steel,resistant to wearing,gas corrosion,long durability.
4.Good emptying capability with quick discharge and easy installation.
5.Capable of combination of multiple bellows,suitable for large discharge.
6.Good air discharge capability,with coldness resistance,zero leakage and backpressure of 75%.
|
Shell pressure grade |
Load leakage |
Used medium |
Permitted backpressure rate |
Energy saving effect |
Maximum operating pressure differential |
|
1.6、2.5MPA |
0% |
Steam、 Condensate water |
75% |
Excellence |
1.6MPA
|
|
Minimum subcooled temperature |
Drainage method |
Maximum allowable temperature |
Air exhaust system |
Freezing resistance |
Resis |
|
0℃ |
Indirect way |
350℃ |
Automatic |
Excellence |
Adaption |
|
Part and component name |
|
|
Valve body、Valve cover |
Forged steel、Stainless steel |
|
Bellows |
Hastelloy alloy |
|
Valve seat |
STL Alloy |
|
Filtrating screen |
Stainless steel |
Product
model
Calibre
Flange
Thread/
welding
H1
H2
W
weight
Pressure
Change
range
(MPa)
Nominal
pressure
SM16
SM46
15~20
25
150
160
100
110
58
20
68
1.9
2.5
3.9
5
0.1-1.6
2.5
SM46
32~40
50
220
230
150
160
68
68
90
5
13
0.1-1.6
2.5
SM46
65~100
310
-
120
95
150
24
0.1-1.6
2.5
Note
1.Please provide operating pressure and operating pressure difference,generating quantity of condensate water,operating temperature,connecting mode and standards in selecting product models.
2.The load of condensate Water's safety coefficient reaches 2 to 3 times in general.
3.Please make sure the drain valve is installed properly,maintained regularly,cleaned up and operates under the normal condition,so as to extend its service life.
Key specifications
| Valve body, Valve cover | Forged steel, Stainless steel |
|---|---|
| Bellows | Hastelloy alloy |
| Valve seat | STL Alloy |
| Filtrating screen | Stainless steel |
