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0

4

8

12 16

No. of turns

RFU-446

RFU-444

17.5

14.0

10.5

7.0

3.5

0

Flow, Qn [SCFM]

0

4

8

12 16

No. of turns

RFU-483

RFU-482

5

4

3

2

1

0

Flow, Qn [SCFM]

UNIDIRECTIONAL FLOW CONTROLLERS

M5 [10-32 UNF]

RFU 452-M5

Mod. RFU-452 flow from B

A needle type

OPEN = 55 NL/min

[1.94 SCFM]

CLOSED = 41 NL/min

[1.45 SCFM]

NB: Qn is determined with a pressure of 6 bar at the inlet

and

D

P=1 bar at the outlet.

N° = number of screw turns

To ensure the right choice of 1/4” unidirectional flow controller

Mod. RFU 444 or Mod. RFU 446, proceed as follows:

calculate the quantity of air in Nl/min. (see cylinder table),

determine the stroke time of the cylinder;

refer to the graph to see which controller

is the right type. In the case of bidirectional regulators,

refer to the graph and check whether the flow control

range is suitable for the work required.

1/8” NPFT

1/4” NPFT

RFU 482-02

RFU 483-02

Mod. RFU 482 flow from B

A needle type

OPEN = 149 NL/min

[6.32 SCFM]

CLOSED = 130.5 NL/min

[4.61 SCFM]

Mod. RFU 483 flow from B

A needle type

OPEN = 180 NL/min

[6.36 scfm]

CLOSED = 140 NL/min

[4.94 SCFM]

NB: Qn is determined

with a pressure of

6 bar at the inlet

and

D

P = 1 bar at

the outlet.

N° = number of

screw turns.

RFU 444-04

RFU 446-04

Mod. RFU 444 flow from B

A needle type

OPEN = 680 NL/min

[24.01 SCFM]

CLOSED = 534 NL/min

[18.86 SCFM]

Mod. RFU 446 flow from B

A needle type

OPEN = 680 NL/min

[24.01 SCFM]

CLOSED = 534 NL/min

[18.86 SCFM]

NB: Qn is determined

with a pressure of

6 bar at the inlet

and

D

P = 1 bar at

the outlet.

N° = number of

screw turns.

i n - l i n e f l ow con t ro l v a l v e s

The company reserves the right to vary models and dimensions without notice.

These products are designed for industrial applications and are not suitable for sale to the general public.

140

N P T F/ I NCH

f l ow con t ro l v a l v e s & a c c e s sor i e s

4