AVR / AVB Shut-Off Valves with electric actuator
Shut-off Valves
GEA shut-off valves (AVR, AVB, AVR/AVB also with electric) are designed for installation in industrial heating and refrigeration systems. The stem sealing is provided either by a threaded bush (AVR type) or by a threaded bush with an additional metal bellows (AVB type) to ensure a complete hermetic sealing. Electric actuator AVR/AVB are powered by an electric motor connected to the stem. The valves can be operated by a hand wheel or a ratchet attached to the stem. By turning the stem clockwise, the valve disc is lowered onto the valve seat, thereby closing the valve. Counter-clockwise rotation of the stem raises the valve disc, opening the valve. Shut-off valves should only be operated in the fully open or fully closed position. When the valve is fully opened, it is possible to replace the threaded bush and the seal. The valves are equipped with a back seal. When the valve is fully opened it is possible to replace the threaded bush and the sealing.
Shut-Off Valves type AVB
Technical Features
- Available in steel or stainless steel
- Selection of body material as per German DIN EN12284, AD2000 Series W
- Working mediums: refrigerants as per EN 378 p. 1, e. g. NH3, R22, R134a and blends with refrigerator oil; neutral, gaseous and liquid mediums, glycol-based cold brine
- Assembly is possible in any position
- Electric actuator is designed for ambient temperatures of -40 °C up to +60 °C, enclosure protection: IP68 as per EN 60529, mains: 220V 50 Hz 3-ph AC, insulation class: F, tropicalised, motor protection: thermoswitch 140 °C NC, heater: 110V-250V AC/DC self-regulating
| AVB Shut-off Valves | AVR Shut-off Valves | AVR / AVB Shut-Off Valves
with electric actuator | |
| material | steel or stainless steel | steel or stainless steel | steel or stainless steel |
| nominal size | DN 10-300 | DN 6-500 | DN 25-500 |
| nominal pressure level | PS 25, PS 40 | PS 25, PS 40, PS 63, PS 160 | PS 25, PS 40, PS 63 |
| temperature range for Standard Valves | -60 °C to +150 °C | -60 °C to +150 °C | -60 °C to +150 °C |
| temperature range for HT Valve Series | -10 °C to +200 °C | -10 °C to +200 °C | -10 °C to +200 °C |
| connection | butt welding and flanged ends
as per DIN and ANSI brazed ends threaded ends | butt welding and flanged ends
as per DIN and ANSI brazed ends threaded ends | butt welding and flanged ends
as per DIN and ANSI |
| additional information | available with cover extension | available with cover extension | equipped with electric actuator |
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