Festo MPA-S, Руководство пользователя

Страница: 33 / 174

2 Overview
Festo – P.BE-MPA-EN – 1309f – English 33
P pressure regulator (Ident. code PF, PA)
Pressurizing process The P pressure regulator regulates the pressure in front of the valve in
duct (1) (P). This provides the same regulated working air pressure in
channels (2) and (4).
Exhaust process In the valve, the exhaust flow is from channel (2) to channel (3) and
from channel (4) to channel (5) through the pressure regulator plate to
the valve terminal.
Tab. 2.12 P pressure regulator
The advantages of the P pressure regulator are:
– The pressure regulator is not affected by exhausting, since the pressure is regulated upstream of
the valve.
– The pressure regulator can always be adjusted, because the pressure from the valve terminal is
always present.
Sample application:
– An equal working pressure is required at working lines (2) and (4).
– A lower air pressure (e.g. 3 bar) is required than the operating pressure present at the valve termin-
al (e.g. 8 bar).
A or B pressure regulator (Ident. code PH, PC, PG, PB)
Pressurizing process The A or B pressure regulator regulates the corresponding pressure of
the air in ducts (2) (B) or (4) (A) after the pressure medium has passed
through the valve.
Exhaust process During the exhaust process, the exhaust flow in the valve is unregulated
from duct (2) to duct (3) for the B pressure regulator and from duct (4)
to duct (5) via the A pressure regulator.
Tab. 2.13 A or B pressure regulator
Restrictions of the A or B pressure control:
– The exhaust flow in the regulating direction is limited by the pressure regulating valve.
– The pressure of the air in channel (2) can only be set and read at the pressure gauge when the valve
is activated (flow from 1
}
2).
Application examples:
– If different air pressures are required at ports (2) and (4) instead of the operating pressure of the
valve terminal.
– If the reversible pressure regulator cannot be used. For example, when 2x 3/2-way valves with duc-
ted solenoid exhaust (82/84) are used.