- REFRIGERATION AMMONIA COMPRESSORS
- ICE MACHINE
- REFRIGERATION VESSELS
- REFRIGERATION SYSTEM ACCESSORIES
- REFRIGERATION PURGERS
- EVAPORATIVE CONDENSERS
- HB PRODUCTS
- WITT PRODUCTS
The high side control offers a simple mechanical maintenancefree solution to expanding liquid refrigerant from the high to the low pressure side of a refrigeration system, without gas passing. From technical and economical point of view this is the optimum and safest way of expanding refrigerant and handling condensate return.
HR1- HR4, HS50 and HR1BW:
Max. allowable pressure PS: 25 bar between +75/-10°C 18,75 bar between -10/-60 °C Test pressure PT: 37 bar oil pressure
Max. allowable pressure PS: 40 bar between +90/-10 °C 30 bar between -10/-60 °C Test pressure PT: 59 bar oil pressure
Max. allowable pressure PS: 65 bar between +100/-10 °C 48,75 bar between -10/-60 °C Test pressure PT: 100 bar oil pressure
HS30 - HS40
Max. allowable pressure PS: 40 bar between +75/-10 °C 30 bar between -10/-60 °C Test pressure PT: 59 bar oil pressure
Reduction of filling capacity:
With the WITT HR & HS condensate is continuously expanded to the low pressure side. That means during normal operation nearly the entire refrigerant charge is stored on the low pressure side, whereby a high pressure receiver is unnecessary.
Due to the mechanical design no wiring or additional controls are required. In the event of a power failure condensate is drained safely to the low pressure side, ensuring highest operational safety.
Since refrigerant is always drained by the float whenever condensate accumulates, lower condensing temperatures can be utilized without a need to consider other control criteria. Compared to a system operating with traditional expansion valves there is neither a need for sub-cooling liquid nor superheating the suction gas. (Remark: energy savings of up to 13% are quite possible, i.e. with 5 K lower condensation temperature).
Stable plant operation:
Pressure fluctuations are avoided by continuous condensate drainage, guaranteeing stable operation of the whole system.
Reduction in maintenance cost:
During downtimes of the refrigeration system there will be slow pressure equalization when using float regulators with low pressure nozzles. Systems with only one compressor can be started from an unloaded condition without need for additional controls
|Total height including valves [mm]||Diameter [mm]||Depth [mm]||Connections [DN]||Weight [kg]|
|HR 1 BW||40 *||310||200||365||25||10|
|HR 1||95 *||440||200||425||25||13|
|HR 2||390 *||480||250||445||32||23|
|HR 3||1,160 *||640||345||555||50||54|
|HR 4||3,345 *||910||406||765||80||135|
|HS 30||1,045 *||510||290||655||100/50||49|
|HS 40||2.815 *||685||400||775||150/80||107|
|HS 50||4.745 *||855||406||765||200/80||135|
|WP 2 HR||260 **||460||250||475||32||26|
|WP 3 HR-65||860 **||545||355||650||50||68|
* Refrigerant: NH3, T0 = -10 ° C, TC = + 35 ° C | ** Refrigerant: NH3, T0 = + 35 ° C, TC = + 75 °
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