Subject:- Refrigeration and Air Conditioning

Topic:- Vapor Compression Refrigeration System

Difficulty:- Medium

• The thermostatic expansion valve consists of a needle valve, a seat, a metallic diaphragm, a spring, adjusting screw and a feeler bulb.

• The opening or closing of valve depends upon following forces acting on the diaphragm:

  i. Spring pressure acting on bottom of diaphragm

  ii. Evaporator pressure acting on bottom …