These metering devices generally consist of several basic components: 1) a valve body with a needle valve assembly used to change its port opening; 2) a magnetic coil used to reposition the needle ...

Many refrigeration compressors incorporate a suction service valve and a discharge service valve. These are used to allow refrigeration gauges to be attached to the system; and, if needed, they are ...

If I move the suction valve to the “drain,” the pressure is good. However, if I move it to “skimmer” the pressure drops and the motor makes a loud noise. What can I do?

If I move the suction valve to the "drain," the pressure is good. However if I move it to "skimmer" the pressure drops and the motor makes a loud noise. What can I do?