Page 283 - Bürkert

2/2-way Globe Control Valve CLASSIC with positioner,
flange version

System 8802-GB-I Continuous Classic • With three to five interchangeable valve

seat sizes per port size
• Excellent control performance
• Lengths according to international
industry standards
• Compact design
• High reliability

The 2712 system has been specifically engineered for reliable control in Envelope Dimensions [mm] (see datasheet for details)
applications where control accuracy is paramount. The valve is made

from an all stainless steel valve body combined with Bürkert’s classic
pneumatic actuator. When combined with the 8692 TopControl, a unique
control valve system is formed which can be operated as a simple,
accurate positioner for flow rate, temperature or pressure.

Technical Data
A
Materials
Body (Type 2712) Cast stainless steel 316L (conform to 1.4409)
Sealing (Type 2712) Stainless steel/stainless steel
Actuator (Type 2712) PA (polyamide) (PPS on request)
Body (Type 8692) PPS, Stainless steel
Cover (Type 8692) PC
Seal (Type 8692) EPDM
Sealing Stainless steel/stainless steel
B
Seat leakage
acc. to IEC 534-4/EN 1349 Shut-off class IV for St.st./St.st. Actuator A B
Viscosity Max. 600 mm /s Ø [mm]
2
Packing gland PTFE V-rings (silicon grease) with spring com- 80 91 414
pensation 80 91 414
Nominal pressure PN25 (body) 80 91 409
Temperature 80 91 412
Medium -10 °C to +180 °C 100 91 496
Ambient 0 °C to +55 °C actuators 80 to 125 mm
0 °C to +50 °C actuators 175 and 225 mm 100 91 501
Control medium Compressed air 125 91 538
Pilot pressure 5.5 to 7 bar actuators 80 to 125 mm 125 91 567
5 to 6 bar actuators 175 and 225 mm 175 91 634
Pilot air ports Push-in connector (Ø 6 mm and 1/4" tube) 175 91 642
Flow direction Below seat 225 91 637
Control ratio (Kvs/Kv0) 50:1 175 91 652
Operating voltage 24 VDC +/-10% 225 91 647
Setpoint 0/4 to 20 mA and 0 to 5/10 V

Note: For more technical data see Type 8692

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