Exam 24: Expansion Devices

A thermostatic expansion valve meters refrigerant flow to the evaporator based on the ____.

AXVs are usually found on smaller equipment with somewhat constant evaporator loads .

Explain why the external equalizer line on a thermostatic expansion valve should always be installed after (downstream of) the thermal bulb.

The automatic expansion valve maintains a constant ____________________ in the evaporator .

The pressure-limiting TXV ____.

If the thermal bulb assembly develops a leak, what will occur?

The pin or valve port piston of the electronic step-motor expansion valve can move in a linear motion of 0.0000783 in./step .

The following is a function of an expansion device:  ____.

The pressure-limiting TXV is desirable in low temperature applications because it keeps the suction pressure to the compressor down during hot pulldowns .