Gestra AK45 Automatic drainage valve

Automatic drainage valve

Data Sheet 810456-02 Issue Date: 05/04
Condensate Drain Valve
AK 45
PN 40, DN 15, 20, 25 (½", ¾", 1")
Space required for opening valve 40 mm
H²
b
g k D
System Description The AK 45 automatically drains condensate from steam systems during start-up, until the pressure in the system has
reached the adjusted valve closing pressure.
H¹
At shut-down or when the pressure falls below the closing pressure the valve opens and accumulated condensate is
automatically drained away.
Function
L
When there is no pressure the drain valve is held in the open position by the integral spring. As soon as the service
pressure has reached the closing pressure to which the AK 45 has been adjusted, the valve closes (by the differential
pressure acting on the valve cone against the force of the spring). When the pressure drops below the closing pressure,
the AK 45 opens by spring force.
Space required for opening plug 30 mm
AK 45 with flanged ends
A hand purging knob is provided, so that the AK 45 can be opened by hand with the system under pressure to clear any
deposits from the valve seat area.
The AK 45 is adjusted at our works to close at a differential pressure of 0.8 bar (12 psig).
The AK 45 is provided with an integral strainer.
Pressure/Temperature Rating Max. service pressure
[barg]  32  22  21 [psig] 465 320 305
Related temperature
[°C] [°F]
250 482
385 725
400 842
Materials
DIN reference
ASTM equivalent
Body
C 22.8 (1.0460)
A 105
24 CrMo 5 (1.7258)
ASTM A 193 B 7
Cover screws Other internals
Stainless steel
Connections Flanges DIN, PN 40 ANSI 150 and 300 B.S. 10, table E, F, H and J
Screwed sockets:
BSP and NPT
End connections
Dimensions and Weights
53 96
AK 45 with screwed sockets
15 ½
Dimensions
L 150 150 160 95
H1 70 70
H2 97 97
Approx. weight
[kg]
3.7
D b k g l Number of bolts
4.3
25 1
4.8
15 ½
20 ¾
2.2
2.1
25 1
2.0
End connections
Flange dimensions Flange dimensions
20 ¾
Screwed
[mm] [in]
L
AK 45 with screwed sockets
L
Flanged
Nominal size
DIN 95 16 65 45 14 4
105 18 75 58 14 4
CL 150 115 18 85 68 14 4
88.9 11.1 60.3 34.9 15.9 4
98.4 12.7 69.8 42.9 15.9 4
CL 300 107.9 14.3 79.4 50.8 15.9 4
95.2 14.3 66.7 34.9 15.9 4
117.5 15.9 82.5 42.9 19.0 4
123.8 17.5 88.9 50.8 19.0 4