Regulating valves, Type HRAR, HRAB, HRAR/HRAB with Electric Actuator
Regulating Valves
GEA regulating valves (HRAR, HRAB, HRAR/HRAB with Electric Actuator) are designed for installation in industrial heating and refrigeration systems. Actuation is by hand wheel or ratched. These valves are both regulating and shut-off valves. Rotating the stem clockwise will lower the valve disc onto the valve seat and therefore close the pipe, counter-clockwise rotation will lift the valve disc and open the pipe. The regulating function is enabled by a cone on the underside of the valve disc. The maximum diameter of the cone corresponds to the valve’s nominal diameter. The stem sealing is provided by a threaded bush with spring-elastic PTFE ring (HRAR). The stem sealing is provided by a threaded bush and a metal bellows which ensures a complete hermetic sealing (HRAB). The valves are equipped with a back seal. When the valve is fully opened it is possible to replace the threaded bush and the seal.
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
- Installation is possible in any position but the flow direction must be observed
- HRAR/HRAB with Electric Actuator:
- 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, tropicalized, motor protection: thermoswitch 140 °C NC, heater: 110V-250V AC/DC self-regulating
| HRAR Regulating Valves | HRAB Regulating Valves | HRAR/HRAB Regulating Valves with Electric Actuator | |
| Material | steel or stainless steel | steel or stainless steel | steel or stainless steel |
| Nominal size | DN 6-250 | DN 10-250 | DN 25-250 Larger nominal diameters upon request, subject to technical feasibility. |
| Nominal Pressure Level | PS 25, PS 40, PS 63, PS 160 | PS 25, PS 40 | PS 25, PS 40 |
| 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, brazed ends |
| Additional information | available with cover extension | available with cover extension | equipped with electric actuator |
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