Page 179 - Bürkert

3/2-way Globe Valve, pneumatically operated

2002 G 1/2” - G 2” 3

• Different flow circuit functions and 2
control functions
3 1
• Long life actuator P
2
• Optical display as standard in series
3
• Rotary actuator aligns the pilot air ports 1 P1 P2
1 3
2
P

The externally piloted globe valve consists of a pneumatically operated Envelope Dimensions [mm] (see datasheet for details)
piston actuator and a 3-way valve body. The drive is manufactured as
standard in PA. On request PPS is available for high ambient tempera-
tures (e.g. external sterilisation) up to 140 °C. High flow rates are at- Pilot air ports 1/4”
tained with the self proven gunmetal body. A reliable self-adjusting pack-
ing gland provides high sealing integrity. Various fluidic circuit functions Connec- A B C D
tion
can be obtained by a simple exchange of the pressure and service ports. G 1/2” 75 80 213 49
These maintenance-free and robust valves can be retrofitted with a com-
G 3/4” 75 80 213 49
prehensive range of accessories for position indication, stroke limitation
G 1” 90 80 216 52.5
or manual override.
G 1 1/4” 120 153 336 66
G 1 1/2” 120 153 336 66
Technical Data G 2” 160 153 350 85
Pressure range See Ordering Chart
Temperature media -10 ºC to +180 ºC
Ambient temperature -10 °C to +60 °C
2
Viscosity Max. 600 mm /s
Body material Gunmetal Pilot pressure chart (CFA, flow direction 3 g 2)
Seal material PTFE
Actuator material Polyamide (optional PPS) Ø125 Ø63 Ø50 Ø125 Ø63 Ø80
Stuffing socket (with silicone grease) PTFE V-Rings with spring compensation Actuator size
Orifice
Max. pilot pressure 10 bar, 7 bar with actuator size Ø 125 DN40/32 DN15/20 DN15/20 DN32/40
Control medium Instrument air at 6 bar 16 DN50 DN25
Operating pressure [bar] at port 3
Safe position Normally closed or normally open 14
Note: For PA actuators in the sizes 50 and 63, the combination of max. 12
10
media temperature and max. ambient temperature is as shown in the 8
following chart: 6 4

Ambient temperature 2 0 0 1 2 3 4 5 6 7 8 9 10
Pilot pressure [bar]
Ambient temperature °C
70
Options
60
Ø 63 • Normally open
50
Ø 50 • Double acting
• Solenoid pilot valves
40
• Vacuum version
30
• Feedback switches
20
100 120 140 160 180 200 • Cleaned for oxygen service
Mediums temperature °C
• Stroke limiter
178