LIQUID CAPACITIES (U.S. GPM)
APPLICATION: REFRIGERANT PUMP RELIEF
REGULATOR (HA4AL)
Capacities assume no gas flashing. No capacity correction
required for temperatures between –40F (–40°C) and +40F
(+4.4°C).
OIL CAPACITIES (U.S. GPM)
APPLICATION: SCREW COMPRESSOR OIL
PUMP RELIEF REGULATOR (HA4AL)
Capacities based on oil with less than 300 SSU viscosity.
HOT GAS DEFROST NOMINAL VALVE SIZING CAPACITIES
(DEFROSTING EVAPORATOR SIZE TONS)
*Or an outlet pressure regulator with electric shut-off (HA4AOS).
Evaporator tons at 10F (5.6°C) TD (temperature differential), valve capacities are conservative. These capacities can be modified up
or down depending on type of evaporator, temperature, mass, frost thickness, defrosting time, etc. Typical for –20F (–28.9°C)
evaporator.
GAS CAPACITIES (TONS)*
(1 Ton= 12,000 Btu/hr= 3.517 kW= 3042 kcal/hr)
HOT GAS BY-PASS TO SUCTION
Hot gas bypass capacities are based on above given temperatures.
Liquid temperature is the same as condensing temperature.
Evaporator temperature +40F (+4.4°C) or less for +86F (+30°C)
condensing; –22F (–30°C) evaporator for +15F (–9.4°C) condensing.
= Bypass from intermediate pressure at saturation temperature to booster suction.
* These capacities are not for hot gas defrost relief. See the chart in the middle of this page.
** Optional 25% and 50% reduced capacity ¾" (20 mm) plugs are available.
Discharge gas capacities are based on +15F (+10°C) evaporator temperature.