Gestra GK21

Data Sheet 810426-02 Issue Date: 06/10
GESTRA Steam Traps
GK 11, GK 21
PN 16, DN 50 – DN 100
PN 10, DN 150 Description Thermodynamic steam traps with GESTRA stage nozzle for the discharge of large condensate flowrates. Automatic deaeration
at startup and in continuous operation. The traps discharge condensate continously and operate quietly. They are highly wear
resistant and can handle dirty condensate.
Integral Vaposcope (sightglass) for monitoring the heating surface and for optimum trap adjustment. The traps can be continuously adjusted between steam-tight and purge positions, by means of the handwheel and lift indicator.
Pressure/Temperature Rating
GK 11/GK 21, to DIN 1092-2, PN 16 (DN 50 – 100) Max. service pressure
[bar]
16
12.8
9.6
Related temperature
[°C]
120
200
300
GK 11, nach DIN 1092-2, PN 10 (DN 150)
GK 11 / GK 21
Max. service pressure
[bar]
10
8
6
Related temperature
[°C]
120
200
300
Max. differential pressure (inlet pressure minus outlet pressure)
[bar]
6
Materials Item
DIN reference
ASTM equivalent
Body
EN-JL 1040 (0.6025)
A 126 Class B
Cover bolts
1.7709
A 194-7
Nuts
1.7709
A 194-7
Nozzle insert DN 50 – 80
EN-JL 1030 (0.7040)
A 536
Nozzle insert DN 100, 150
EN-JL 1040 (0.6025)
A 126 Class B
Stage nozzle
EN-JL 1040 (0.6025)
A 126 Class B
X20Cr13 (1.4021)
AISI 420
Stem
Connections Flanges to: EN 1092-2, PN 10/16