Table of Contents
What is bypass line in piping?
A bypass is a system of pipes, pumps, hoses, and valves that help divert the flow from a pipe section that is under repair or rehabilitation. This temporary diversion allows the flow to continue when the primary line is blocked for rehabilitation.
How do you size a chilled water bypass valve?
In a variable primary flow system, size the bypass line for the largest minimum flow rate. In this case: 200 tons x 1.2 gpm per ton = 240 gpm [15 L/s] Many designers will use 4 in [10 cm] line for this flow rate. Then select a valve to give proper bypass control.
What is the use of Decoupler line in chilled water system?
The premise of a primary- secondary system is to hydraulically separate (decouple) the primary (chiller) flow from the secondary (system) flow. This decoupling prevents the operating pressures of chiller pumps from impacting the operating pressures of the system pumps.
How does a chilled water loop work?
A chilled water system uses water instead of air to cool your home. The water absorbs heat from the home and disperses it outside. The system cools the water down to a temperature of 40 degrees and then circulates it through the water coil’s air handler.
What is the purpose of the bypass function?
When you blow out, it closes the valve and allows the air to flow out into the water.” Bypass valves are important in any system through which water or oil is pumped to maintain an even pressure and keep the system operating. Construction equipment in particular relies on bypass valves to relieve pressure build-up.
What is the function of bypass?
Pressure bypass valves serve to control pressure in a system by diverting a portion of the flow. Typically they bypass fluid from the outlet of a pump back to the reservoir.
How much pressure is in a chilled water system?
Generally, most chilled water systems operate at a pressure of around 10-12 bar. Some chilled water systems work at more than 16 bar of pressure but they rarely exceed 20 bar. High pressure chilled water systems usually use heat exchangers to reduce the pressure to below 20 bar.
What is the function of the flow switch device connected to the chiller?
The flow switch detects whether there is any flow in the piping and opens or closes an electrical contact. It is normally used in heating, air-conditioning, refrigeration, water treatment, additive pumping and process systems in general.
What is a chiller bypass?
The purpose of the chiller/heater system bypass is to prevent deadheading of the pumps when all of the internal unit valves go closed as well as allow temperature and differential pressure sensors to sense active flow.
What is a decoupler used for?
Under normal circumstances, the decoupler functions to isolate or block the flow of DC current (cathodic protection) to other equipment or grounding material, thereby eliminating any negative influence on your CP system caused by neighboring equipment or grounding materials.
What is the working pressure of chilled water system?
What are the main components of a chilled water system?
Key system components include chilled and condenser water pumps, cooling towers, heat exchangers, and hydronic specialties including water pressure regulators, air separators, and chemical feed pots.