Georg Fischer 244 Specifications
GF Piping Systems
Pneumatically Actuated Lug Style
Butterfly Valve
Type 244
General
The Type 244 series pneumatically actuated lug style butterfly
valve from Georg Fischer is the ultimate choice for the high
demands of the industrial world. The unique double eccentric
design means the disc is not in contact with the seal when the
valve is being operated. The result is less component wear and
decreased required operating torques when compared to
traditional boot-style designs. Better chemical compatibility is
achieved because the inner body is the same material as the
pipe. The unique Q ring design insures a superior seal with
virtually any type of flange without the need for additional
gaskets. Additionally, the electro-pneumatic positioner, stroke
limiter, and feed back switches give flexibility for integration
into a wide variety of applications.
Features
• Size: 2”–12”
• Outer body: Glass-filled PP with overmolded SS316 lugs
• Body materials: PVC, CPVC, PP and PVDF
• Stem: 316 stainless steel
• Seal: EPDM or FPM; PTFE seals available upon request
• Movement: Fail open, fail closed, and double acting
• Mechanical: Namur compliant air connection and mounting
console for accessories such as positioner and feedback switches
• Visual position indicator
• Stroke limiter
Optional Features
• Solenoid air control valve
• Limit switches
• Declutchable manual override
• Electro-pneumatic positioner
Technical Data
180
165
150
135
120
105
90
75
60
45
30
15
0
-50 -30 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
temperature in °C
permissible pressure in psi
ABS, PVC, CPVC
(useful life 25 years; medium water)
CPVC
ABS
PVC
Y (psi)
Pressure-temperature diagrams
PP, PVDF (useful life 25 years; medium water)
180
165
150
135
120
105
90
75
60
45
30
15
0
permissible pressure in psi
temperature in °C
ABS, PVC, CPVC
180
165
150
135
120
105
90
75
60
45
30
15
0
permissible pressure in psi
temperature in °C
ABS
PP
(useful life 25 years; medium water)
CPVC
PVC
PVDF
Flow characteristics
100
90
80
70
60
50
40
Cv value (%)
30
20
10
0
0102030405060708090 100
opening angle (%)
Pressure loss
DN 50 / 2"
DN 65 / 2½"
X (US gal./min)
DN 100 / 4"
DN 80 / 3"
X (l/min)
DN 125 / 5"
DN 150 / 6"
DN 250 / 10"
DN 200 / 8"
DN 300 / 12"
2.64 26.4 264.2 2642
1
0.1
Y (bar)
0.01
0.001
Operating torque
14.5
1.45
0.145
0.0145
000001000010001001
P0737409
Cv values
DN mm Inch d mm Cv 100 gal/min
(Δp = 1 psi)
50 2 63 103
65 2½ 75 154
80 3 90 210
100 4 110 455
125 5 140 805
150 6 160 1162
200 8 225 2772
250 10 280 3570
300 12 315 5110
2
For non-GF actuators, breakaway torques 2.5 to 4 times the value of the
moving torque must be taken into consideration, depending on the
application conditions (e.g. control time, medium, temperature, etc.).
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