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Technical information
1. Stud
2. Bolt
3. Sealing washer
4. Sleeve
5. Compression spring
6. Valve guide
7. O-ring
Applications
For use with hydraulic fluids and compressed air. To
ensure the suitability of the valves for your application,
please specify the medium, where necessary also the
concentration level, the maximum operating pressure
including pressure peaks, the temperature and the
frequency of valve actuation.
Design and construction
Eaton’s Walterscheid check valves are
equipped with 90° tapers and a sealing washer
made from FPM (e.g. Viton).
The internal parts are designed to optimize
the media flow.
Operating temperature
Temperature range of -20 °C to +100 °C
Materials
1. Stud: galvanized steel
2. Bolt: galvanized steel
3. Sealing washer: FPM
4. Sleeve: galvanized steel
5. Compression spring: steel
6. Valve guide:
Tube outer diameter 6-28 mm: brass
Tube outer diameter 30-42 mm: galvanized steel
7. O-ring: FPM
Opening pressures
The check valves come with a standard
opening pressure of 1.0 bar.
Alternative opening pressures from 0.5 to
3.0 bar are available on request.
Version
The port thread of the check valves is sealed
by means of a soft seal.
The opening pressure and flow direction
are indicated on the valves.
Assembly
The valve bodies come fully assembled
and with the required opening pressure.
When connecting or dismantling the tubes,
the hexagon socket closest to the union nut
must be held firmly in place to prevent
the sealing edge at the inside of the
valve body from coming loose.
Check valve
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• for opening pressure of 1 bar
• fitting dimensions available on request
Pressure loss if check valves are used
Measured using 35 mm
2
of hydraulic oil per second
Opening pressure 0.5 bar
The valve insert with nominal size 16 must
not be installed in reverse position.
Nominal width Tube outer diameter Art. no.
6 6-12 WAL032431
10 14-18 WAL032438
16 20-28 WAL032445
25 30 WAL032451
32 35 – 42 WAL032457
Valve bolt
Seal
Sleeve Compression spring
Valve guide
Flow rate Q in l/min
Model Model
Pressure loss p (bar)
Pressure loss
p (bar)
Flow rate Q in l/min
Check valve (valve insert)
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P-RV ...
P-RV ... -1.4571
•
Tube connection at both ends
WALPRO
P-RV...
WALPRO
Stainless steel
(1.4571)
P-RV … 1.4571*
Series
PN
bar (psi)
Tube
outer diameter Model
kg/
100 pc. L
2
L
5
I
1
S
1
S
2
S
3
Ø of
outlet Art. no. Art. no.
L
400
(5801)
6 P-RV 6 L 12.7 67 52 38 22 14 27 4.0 WAL374062 WAL620511
8 P-RV 8 L 14.7 67 52 38 22 17 27 6.0 WAL374063 WAL620510
10 P-RV 10 L 14.8 67 52 38 22 19 27 7.5 WAL374064 WAL620383
12 P-RV 12 L 19.1 68 53 39 22 22 27 7.5 WAL374065 WAL620461
15 P-RV 15 L 27.3 74 58 44 27 27 32 11.0 WAL374066 WAL620458
18 P-RV 18 L 35.5 80 63 48 27 32 32 11.0 WAL374067 WAL620467
250
(3626)
22 P-RV 22 L 61.8 92 75 60 41 36 46 18.5 WAL374068 WAL620404
28 P-RV 28 L 76.5 99 81 66 41 41 46 18.5 WAL374069 WAL620389
35 P-RV 35 L 168.0 114 92 71 60 50 70 29.0 WAL374070 WAL621556
42 P-RV 42 L 223.5 101 87 65 60 60 70 29.0 WAL374483 WAL621558
S
400
(5801)
6 P-RV 6 S 14.1 71 56 42 22 17 27 4.0 WAL374071 WAL621559
8 P-RV 8 S 15.3 67 52 38 22 19 27 5.0 WAL374072 WAL620707
10 P-RV 10 S 17.2 71 54 39 22 22 27 7.0 WAL374073 WAL621546
12 P-RV 12 S 20.7 72 55 40 22 24 27 7.5 WAL374074 WAL620708
14 P-RV 14 S 30.0 81 62 46 27 27 32 10.0 WAL374075 WAL621549
16 P-RV 16 S 34.9 84 65 48 27 30 32 11.0 WAL374076 WAL620709
20 P-RV 20 S 68.2 100 78 57 41 36 46 16.0 WAL374077 WAL621552
250
(3626)
25 P-RV 25 S 94.5 105 81 57 41 46 46 18.5 WAL374078 WAL620349
30 P-RV 30 S 128.5 117 91 64 50 50 55 24.0 WAL374079 WAL621554
38 P-RV 38 S 234.7 128 99 67 60 60 70 29.0 WAL374080 WAL621557
Caution: The pressure specifications refer to the steel version. For the stainless steel version (1.4571), please refer to the pressure specifications on page B5.
Caution: The dimensions of the stainless steel version deviate from the specified check-valve dimensions.
*For complete stainless steel fittings (1.4571) with silver-plated nut (AG/AGP), see price list
L
2
= approximate dimension if the union nut is tightened
L
2
L
5
I
1
S
2
S
3
1.0
S
1
S
2
System nuts for supplementing the stud
(for technical data, see part D of this catalog)
Stud
RS …
Stud
Stainless steel
(1.4571)
RS … -1.4571
WALRING
W-R ... VI
WALFORM
WF-M ... VI
WALFORM
Stainless steel
(1.4571)
WF-M … VI -1.4571*
Series
PN
bar (psi)
Tube
outer diameter Model
kg/
100 pc. Art. no. Art. no. Art. no. Art. no. Art. no.
L
400
(5801)
6 RS 6 L 12.0 WAL068052 WAL604852 WAL624607 WAL625940 WAL625980
8 RS 8 L 12.5 WAL067394 WAL604850 WAL624608 WAL625941 WAL625981
10 RS 10 L 11.5 WAL067395 WAL602518 WAL624609 WAL625942 WAL625982
12 RS 12 L 12.5 WAL066490 WAL370758 WAL624610 WAL625943 WAL625983
15 RS 15 L 18.5 WAL067396 WAL602473 WAL624611 WAL625944 WAL625984
18 RS 18 L 23.0 WAL063191 WAL604499 WAL624612 WAL625945 WAL625985
250
(3626)
22 RS 22 L 51.1 WAL067397 WAL603962 WAL624613 WAL625946 WAL625986
28 RS 28 L 57.0 WAL066743 WAL602724 WAL624614 WAL625947 WAL625987
35 RS 35 L 130.5 WAL067398 WAL617645 WAL624615 WAL625948 WAL625988
42 RS 42 L 123.4 WAL067399 WAL617646 WAL624616 WAL625949 WAL625989
S
400
(5801)
6 RS 6 S 13.0 WAL067400 WAL617647 WAL624617 WAL625950 WAL625990
8 RS 8 S 12.0 WAL067401 WAL607288 WAL624618 WAL625951 WAL625991
10 RS 10 S 13.0 WAL067402 WAL617648 WAL624619 WAL625952 WAL625992
12 RS 12 S 14.0 WAL063381 WAL602552 WAL624620 WAL625953 WAL625993
14 RS 14 S 18.5 WAL067403 WAL617649
16 RS 16 S 22.0 WAL025190 WAL606504 WAL624621 WAL625954 WAL625994
20 RS 20 S 66.2 WAL067404 WAL374975 WAL624622 WAL625955 WAL625995
250
(3626)
25 RS 25 S 53.0 WAL067405 WAL372145 WAL624623 WAL625956 WAL625996
30 RS 30 S 81.0 WAL067406 WAL617650 WAL624624 WAL625957 WAL625997
38
RS 38 S
136.8 WAL067407 WAL374976 WAL624625 WAL625958 WAL625998
Art. no. of WALPRO P-RV... (steel) with different opening pressures
0.1 bar 0.5 bar 2.0 bar 3.0 bar
Series
PN
bar (psi)
Tube outer
diameter Model** Art. no. Art. no. Art. no. Art. no.
L
400 (5801)
6 P-RV 6 L / xx WAL605586 WAL604490 WAL615163 WAL606308
8 P-RV 8 L / xx WAL604362 WAL374935 WAL609996 WAL604502
10 P-RV 10 L / xx WAL604404 WAL605089 WAL605683 WAL602863
12 P-RV 12 L / xx WAL604535 WAL603966 WAL604877 WAL604411
15 P-RV 15 L / xx WAL604478 WAL604384 WAL604645 WAL604727
18 P-RV 18 L / xx WAL604527 WAL372782 WAL604646 WAL374961
250 (3626)
22 P-RV 22 L/ xx WAL604528 WAL604841 WAL605092 WAL605396
28 P-RV 28 L/ xx WAL604632 WAL604653 WAL605209 WAL602566
35 P-RV 35 L/ xx WAL372781 WAL604726 WAL604137
42 P-RV 42 L/ xx WAL605397 WAL604669 WAL604670
S
400 (5801)
6 P-RV 6 S/ xx WAL605289 WAL609920
8 P-RV 8 S/ xx WAL609999 WAL605288 WAL605499
10 P-RV 10 S/ xx WAL606342 WAL606749 WAL610036
12 P-RV 12 S/ xx WAL610000 WAL604289 WAL604290
16 P-RV 16 S/ xx WAL605429 WAL602989 WAL605583 WAL604270
20 P-RV 20 S/ xx WAL604798 WAL605428 WAL606991 WAL604945
250 (3626)
25 P-RV 25 S/ xx WAL605589 WAL604329 WAL604621 WAL605151
30 P-RV 30 S/ xx WAL604675 WAL605390 WAL605416
38 P-RV 38 S/ xx WAL604608 WAL604316 WAL604622
**e.g. P-RV 6L / 0.1
Check valve
