ORD-4-20 - 7/8" ODS | Cooling Equipment

Product Code	902878
Description	ORD-4-20 - 7/8" ODS
Unit	Each
Notes	The ORD valve is a pressure differential valve that responds to changes in the pressure difference across the valve, Figure 6 on the next page. The valve designation stands for Opens on Rise of Differential pressure. Therefore, the ORD is dependent on some other control valve or action for its operation. And in this respect, it is used with the ORI for head pressure control. As the ORI valve starts to throttle the flow of liquid refrigerant from the condenser, a pressure differential is created across the ORD. When the differential reaches setpoint, the ORD starts to open and bypasses hot gas to the liquid drain line. As the differential increases, the ORD opens further until its full stroke is reached at a differential of 10 psi above setpoint. Due to its function in the control of head pressure, the full stroke can be utilized in selecting the ORD. The standard pressure setting for the ORD is 20 psig. ORD type valve is used in conjunction with ORI type valve. Connections - 7/8" ODS Maximum working pressure - 31 bar ORI valve sold separately.
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Documents	Head pressure control valve bulletin