Flowserve MK35/2S - Manual (Page 9)

9
Explanatory Notes
Scope of supply
MK 35/2S
1 Steam trap MK 35/2S
1 Installation manual
Description
Thermostatic steam trap with corrosion resistant thermostatic capsule (membrane
regulator). Integral strainer, asbestos-free cover gasket (graphite). Installation in any
position.
The thermostatic capsule “H” discharges the condensate with virtually no banking up. .
n MK 35/2 S with single seat
With two thermostatic capsules “5H2”. For large condensate flowrates up to
e. g. 1100 kg/h at Δp = 5 bar.
n MK 35/2 S 3 with single seat
With three thermostatic capsules “5H2”. For large condensate flowrates up to
e. g. 1700 kg/h at Δp = 5 bar.
Function
The MK 35... is a multi-capsule high-capacity steam trap with two or three capsules.
The capsule is filled with a liquid which boils at a temperature a few degrees lower
than water. As long as condensate flows through the steam trap the liquid in the
capsule is completely condensed due to the low ambient temperature. The pressure
inside the capsule is lower than the surrounding pressure (service pressure) and the
membrane with the valve disc is pushed in the opening direction. As the condensate
temperature approaches steam temperature, the liquid filling of the capsule starts to
boil and evaporate. The pressure in the capsule rises and the membrane with the
valve disc is moved in the closing direction.
Automatic air-venting is provided both, during start-up and during normal operation.
The correct functioning of the MK 35... is neither affected by fluctuations in the
upstream pressure nor by back pressure. The MK 35... can also be used for thermal
air venting.
Technical Data
MK 35/2S3
1 Steam trap MK 35/2S3
1 Installation manual
Pressure/Temperature Ratings PN 40
Body material 1.0460 (P250GH / C22.8) / ASTM A105
Nominal size (DN) 25
Connection Flanged PN 40, EN 1092-1, WG 3E0
Max. allowable pressure PMA [barg]
40 30.2 25.8 23.1
[psig] 580 437 370 335
Inlet temperature TMA
[°C] 20 200 300 400
[°F] 68 392 572 752