Page 56 - PNEUMATIC SYSTEM INSTRUMENT

energy. A quality of a directional control valve that indicates the valve

has four ways, four ports, and two positions.

Table 7.4: 4/2-Way and 5/2-Way Valves Description

4/2 WAY VALVES 5/2 WAY VALVES

A four-way valve has a pressure A five-way valve has a pressure

port 1(P), two outlets port 4(A) & port 1(P), two outlets port 4(A) &

2(B) and one exhausts port 3(R). 2(B) and two exhausts port 5(R)

& 3(S).

In a normal condition, the In a normal condition, the

pressure port 1(P) is connected pressure 1(P) port is connected

to 2(B) outlet, 4(A) outlet port is to 2(B) outlet, 4(A) outlet port is

connected to the 3(R) exhausts. connected to the 5(R) exhausts.

Exhaust port of 3(S) is open

directly to the atmosphere.

The exhaust port is open directly Both of 5(R) & 3(R) exhausts port

to the atmosphere. are consider having the same

function.

39