FLOAT REGULATOR



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INTRODUCTION

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.

TECHNICAL DETAILS

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

 

WP2HR:

Max. allowable pressure PS: 40 bar between +90/-10 °C 30 bar between -10/-60 °C Test pressure PT: 59 bar oil pressure

 

WP3HR

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

SPECIFICATIONS

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.

 

Safety:

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.

 

Energy-efficient:

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

CAPACITY CHART

 

Power kW]

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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