PDF《One-way flow control valves》

One-way flow control valves Subject to change C 2016/07

2 è Internet: www.

festo.com/catalogue/... One-way flow control valves Key features Function Flow control or one-way flow control valves regulate the piston speed of pneumatic drives during advance and return strokes. This is done through suitable restriction of the flow rate of compressed air in exhaust air or supply air direction. With the one-way flow control valve GRLA or GRLZ, the flow control function works in one dir? ection only (exhaust air or supply air);

the non-return function works in the opposite direction. With the flow control valve GRLO, the flow control function is active in both directions. The flow control function creates an adjustable annular gap inside the valve. This gap can be increased or de? creased by turning the knurled screw or slotted head screw. The required restriction can be set with the help of this adjustment component. -H- Note The documentation for the flow control valves can be found at è www.festo.com/catalogue General information Standard nominal flow rate qnN Exhaust air one-way flow control function Flow measurement circuit The standard nominal flow rate qnN is the flow rate based on standard conditions at an operating pressure of p1 =

6 bar and an output pressure of p2 =

5 bar, measured at room temperature t =

20 °C. Pressure gauge Pressure gauge Flow meter (flow measuring device) Flow control valve Test specimen p1 p2

1 Supply port (pneumatic connection 1)

2 Working line (pneumatic connection 2)

1 2 p1 Operating pressure p2 Output pressure Standard flow rate qn The standard flow rate is measured at an operating pressure of p1 =

6 bar and an output pressure with respect to atmospheric pressure (p2 =

0 bar). Supply air one-way flow control function Flow control function in both directions 2016/07 C Subject to change

3 è Internet: www.festo.com/catalogue/... One-way flow control valves Key features Flow control functions and range of applications Application Description Application Description Double-acting cylinder with one-way flow control valve Exhaust air one-way flow control function Supply air one-way flow control function Speed adjustment through exhaust air flow control. Uncontrolled supply air and controlled exhaust air move the piston between air cushions (improves motion, even with load changes). Adjustable speed during advance and return strokes. The flow rate is identical in both directions. Single-acting cylinder with one-way flow control valve Single-acting cylinder with flow control valve Exhaust air and supply air one-way flow control function Flow control function in both directions Adjustable speed during advance and return strokes. The flow rate can be adjusted differently for both directions. Speed adjustment through flow control on both sides is often applied in the case of single-acting or small cylinders. The benefit of this application lies in its simplicity. Application examples Mini slide SLT with one-way flow control valve, standard Flat cylinder DZF with one-way flow control valve, mini Multimount cylinder DMM with one-way flow control valve, mini Subject to change C 2016/07

4 è Internet: www.festo.com/catalogue/... One-way flow control valves Product range overview Version Valve function Version Type Connection direction Pneumatic connection

1 Pneumatic connection

2 qnN1) Adjustment component è Page/ Internet [l/min] Standard Metal Exhaust air one- way flow control function GRLA Elbow outlet QS-3, QS-4, QS-6, QS-8, QS-10, QS-12 M5, G?, G?, G?, G?

100 … 1,580 Slotted head screw