Georg Fischer 175 User Manual
Ball Valves
George Fischer 3-Way Horizontal Ball Valve Type 343
George Fischer plastic
ball valves have the
following outstanding
features:
• Corrosion resistance
• Ideal flow
characteristics
• Long working life,
maintenance-free
• Light weight
• Silicone free versions
available
• Ball valves Type 343
can be equiped with
George Fischer
electric or pneumatic
actuators (refer to
Type 101 and Type
201 in Section 11)
• Can be actuated
after installation
George Fischer offers a wide range of
manually operated ball valves. The
introduction of the new 3-way ball valve
further extends the industrial product
range. 3-way ball valves are usually
installed for diverting and mixing liquids
in piping systems. While the 3-way ball
valve with L-port is used for the distribution of liquids or the interruption of the
flow, the T-port ball valve is the ideal
solution for mixing of liquids.
The Type 343 is available in PVC, CPVC,
PP and PVDF and also in all the relevant
standards ISO/DIN, BS, ASTM/ANSI,
JIS.
Technical Features
º Position indicator on handle and stem
for easy recognition of function
º Union ends for easy installation and
disassembly
º Handle with integrated tool for easy
maintenance
º High safety via 3 separately inte-
grated union bushings with left hand
threads
L-port ball:
Provides independent connection of
inlets with outlet.
T-port ball:
Provides straight through flow (left to
right), independent connection of inlets
with outlets or interconnection of all three
ports.
º High reliability and long life-span via
3 separate PTFE ball seals directly in
contact with the ball, supported by an
O-ring
º Integrated universal mounting system
for simple and efficient installation.
10
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10.45
Technical Data
k
g
a) Connections
– sockets
– spigots
– threaded sockets
– IR/butt fusion ends
b) Union ends, allow installation or
removal of the connection parts for
easy inspection and maintenance.
The pipeline should be depressurised before dismantling.
c) Union bushing with left-hand thread
and molded end prevents ball from
being blown out by line fluid.
d) Balls with L- or T-port with diverting/
mixing function.
e) Double sealing on the stem for
maintenance free operation.
h
e
f
l
c
f) High strength stem.
g) PTFE ball seal is extremely abrasion
resistant and has good antifriction
properties, good chemical resistance
and a long service life.
h) Backing O-ring automatically com-
pensates for expansion and contraction in the valve and ball seal wear,
resulting in maintenance free operation with low friction ball movement.
k) Handle with integrated position indi-
cator and tool function: the position
of the ball is visible on the handle.
The integrated cams allow the
assembly and dismantling of the ball
valve without additional tooling.
l) Integrated fixing with insert screws.
b
d
a
10.46
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Ball Valves
Functions
The following illustrations show the functions and the corresponding position of
the handle:
Mixing function
Diverting function
Diverting function
Branch closed/
passage open
L-port
T-port
*
*
Closed
10
Example 1 Example 2
* Cv/kv-value low
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10.47
Flow Characteristics
The kv factor is defined as the flow rate of water in litres per minute with a pressure drop of 1 kg/cm2 across the
valve.
The shown k
v-values are in %, to calculate the absolute flow multiply these values with the corresponding values
from the tables.
L-port
Valve positions L-port:
Flow A . B and A . C
100%
90%
A - B
80%
70%
60%
50%
[%]
v
K
40%
30%
20%
10%
0%
0 45 90 135 180 225 270 315 360
a Angle of operation
K
v Kv-value
[°]
a
A - BA - C
F176.1
T-port
Valve positions T-port:
Flow C . A and C . B
100%
C - B
90%
80%
70%
60%
50%
[%]
v
K
40%
30%
20%
10%
0%
0 45 90 135 180 225 270 315 360
C - A
Flow A . B and A . C
100%
90%
80%
C - B
C - A
[°]
a
F200.1
70%
60%
50%
[%]
v
K
40%
30%
20%
10%
0%
0 45 90 135 180 225 270 315 360
A - B
A - C
A - C
A - B
[°]
a
F177.1
a Angle of operation
v Kv-value
K
10.48
a Angle of operation
v Kv-value
K
¬ ‡
Pressure Loss Characteristics
Ball Valves
L-port
Flow C . A
Valve position: 90°
1
0.1
0.01
0.001
1 10 100 1000
Medium: water, 20°C
X Flow rate (l/min)
Y Pressure loss p (bar)
DN10 DN15 DN20 DN25 DN32 DN40
X
T-port
Flow A . C
Valve position: 180°
DN50
T-port
Flow A . B
Valve position: 90°
DN20
1
0.1
0.01
0.001
1 10 100 1000 10000
DN10 DN15
X
Medium: water, 20°C
X Flow rate (l/min)
Y Pressure loss p (bar)
DN25
DN32
T-port
Flow C . A and C . B
Valve position: 180°
DN40
DN50
10
1
0.1
0.01
0.001
1 10 100 1000
DN10 DN15 DN20 DN25 DN32 DN40
X
Medium: water, 20°C
X Flow rate (l/min)
Y Pressure loss p (bar)
DN50
1
0.1
0.01
0.001
1 10 100 1000
DN10 D N15 DN20 DN25 DN32 DN40
X
Medium: water, 20°C
X Flow rate (l/min)
Y Pressure loss p (bar)
DN50
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10.49
L-port
Flow A . C, C . A, B . C, C . B
Valve position: 90°
L-port
Flow A . B
Valve position: 225°
Inch C
size gal/min l/min mm
3/8
1/2
3/4
1
1 1/4
1 1/2
2
v K
3.50 50 16
5.25 75 2o
10.50 150 25
19.60 280 32
33.61 480 40
43.42 620 50
86.13 1230 63
v
100 d
T-port
Flow A . B
Valve position: 90°
Inch Cv Kv 100 d
size gal/min l/min mm
3/8
1/2
3/4
1
1 1/4
1 1/2
2
9.80 140 16
14.01 200 20
32.91 470 25
55.53 793 32
90.34 1290 40
133.75 1910 50
217.09 3100 63
Inch Cv Kv 100 d
size gal/min l/min mm
3/8
1/2
3/4
1
1 1/4
1 1/2
2
0.70 10 16
1.05 15 20
2.10 30 25
3.50 50 32
6.30 90 40
7.70 110 50
15.41 220 63
T-port
Flow A . C
Valve position: 180°
Inch Cv Kv 100 d
size gal/min l/min mm
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2.80 40 16
4.90 70 20
10.50 150 25
17.51 250 32
32.91 470 40
42.02 600 50
84.73 1210 63
T-port
Flow C . A and C . B
Valve position: 180°
Inch Cv Kv 100 d
size gal/min l/min mm
3/8
1/2
3/4
1
1 1/4
1 1/2
2
C
v = gal./min at 1 psi pressure drop
Kv = litres/min at 1 bar pressure drop
2.45 35 16
3.50 50 20
9.10 130 25
14.01 200 32
26.61 380 40
32.91 470 50
62.32 890 63
10.50
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