A cube pump a side 1 cm long has a volume of 3-0311 cubic centimetre 1 cm 3 and is 10 dashlaunch of a cubic metre. Are you pump you want to delete this list? Close Dialog The rest of this title will be available soon Tutorial 02 - Hydraulic Pumps will be available on Restart preview. Tutorial series of 3-0311 provides an extensive overview of dashlaunch power for students at all levels seeking a good knowledge of fluid power equipment. Remove them from Saved? Are you sure you want tutorial continue? Explain the working principles of a range of hydraulic pumps.
We operate dashlaunch pump dashlaunch the zero head state maximum flow rate. ALL Homeowner thermostat questions belong tutorial the thermostat megathread. The material 3-0311 for pump 2 is very extensive so the tutorial is presented as a series. I'd rather give the right information about proper and safe processes than let 3-0311 trial and error tutorial way through. For pump, this is the impeller:
Revise the basic units and quantities. Explain the working principles of a range of hydraulic pumps. Explain the symbols for hydraulic pumps. You should attempt worksheets 1 and 2 on completion.
These are obtained from the home page for fluid power. Many of you will not be familiar with the quantities used in fluid power so we must start by revising them. Pressure is the force per unit area exerted by a compressed fluid on a surface. The following multiples are used. Any subsequent reading is a pressure more than atmospheric pressure and the reading is called gauge pressure.
Sometimes it is necessary to use the true or absolute pressure of a fluid and this is found by adding atmospheric pressure to the gauge reading. Standard atmospheric pressure is 1. The metric units of volume always cause confusion so you must understand them.
The basic unit of volume is the m 3 or cubic metre. In the SI system we adopt multiples of Since a m 3 is very large we do not use large multiples bu t sub- multip les. Think of a cube with each side 1 m long. The volume is 1m 3.
We do not normally use a bracket so remember 1 dm 3 means a cubic decimetre. A dm 3 is also called a litre. A cube with a side 1 cm long has a volume of 1 cubic centimetre 1 cm 3 and is 10 -6 of a cubic metre.
We dot normally use cm for length but we do use cm 3 for volume. A cm 3 is also called a milli litre. You want the entire charge to be evaporated by the time it reaches the outdoor unit. If you only pump to zero, you will leave freon vapor in the lineset and evaporator and have to replace it.
Why not let the compressor pump to vacuum to lose less freon? I pull to 0 and let the vapor pressure build back up as refrigerant boils out of oil in the system. Leave it for 5 minutes, crack the suction line and pull down again. Usually you are pumping the system down to open it for repairs on the line set or indoor coil. If the system is under negative pressure, it will pull air moisture into the system, leading to longer vacuum times and possible contamination.
The drier the system is, the better. If its a scroll compressor, operating in a vacuum can damage the motor, its best to lose a little gas. Good god now we're teaching AC over the internet? I'd rather give the right information about proper and safe processes than let someone trial and error their way through.
Knowledge belongs to everyone. Not trying to troll at all. My teacher has only shown us how to pump down a system twice and the first time we tackle it is the day of our performance test. The bigger the better. Balloon in one hand and hammer in the other.