The water pump's pressure gauge has 3 hands. What are they respectively?
The pump pressure gauge has 3 hands, the pressure gauge should be electric contact pressure gauge. A needle is indicative of the pressure gauge pressure and electric contact point is a public, upper limit of electrical contacts, for the limit of the alarm or control, one is the lower limit of contact for alarm or control.
A pressure gauge, a vacuum meter, and, er, forgot.
[1] the pump pressure gauge has 3 hands, the pressure gauge should be electric contact pressure gauge. A needle is indicative of the pressure gauge pressure and electric contact point is a public, upper limit of electrical contacts, for the limit of the alarm or control, one is the lower limit of contact for alarm or control.[2]: water pump is the motive of the mechanical energy to become liquid to the machine and liquid energy, is a device used to move liquids, gases or special fluid medium, the pumps in use can be classified into the pump, circulating pump, fire pump, pressure test pump, sewage pump; according to the industry classification can be divided into oil pump, pump, chemical pump, metallurgy, mining and other fishing pump pump; according to the principle of classification can be divided into reciprocating pump, plunger pump, piston pump, diaphragm pump, rotor pump; according to the classification of medium can be divided into water pump, sewage pump, water pump, water pump, oil pump etc.. Water pumps are widely used in shipbuilding, oil production, heavy load machines and so on. Under the permission of the geographical environment, the water pump shall be as close as possible to the water source to reduce the length of the suction pipe.
