Festo Стандартные цилиндры DNC-V с распределителем - Manual (Page 16)

Pneumatic linear cylinder
Festo 0506a English
16
Pneumatic installation
Definition
Moveable mass = work load + piston (rod) mass
S Use one−way flow control valves for setting the speed of the piston.
With single−acting cylinders With double−acting cylinders
Type GRLZ (supply air flow control) Type GRLA (exhaust flow control)
Fig. 7
The GRL..−... are screwed directly into the compressed air ports. Other accesĆ
sory parts with excessive screw−in length will damage the cushioning piston.
S Check to see if closed−loop controlled non−return valves type HGL−... are
necessary.
You will then prevent the moveable mass sliding down if there is a drop in
pressure when the product is fitted in a vertical or sloping position.
If an external guide is used:
S Avoid a mechanical overdetermination of the piston rod by one of the following
measures:
ć absolutely exact alignment (general)
ć the use of a self−aligning rod coupling type FK−...
ć the use of a guide unit
type FEN−... with compensating
coupling
A rigid coupling will impair the service life and the function of the cylinder.
5 Commissioning
Complete system
S Slowly pressurize the complete system.
This will prevent uncontrolled movements from occurring.
For slow start−up pressurization use safety start−up valve type HEL−...Ă.