CLA-VAL CRA - CLA

CLA-VAL CRA
®
Pilote - Control - Steuerventil
PN 10 - 16 - 25
TM
1
PILOTE DE REDUCTION DE PRESSION
Le pilote de réduction de pression est du type normalement ouvert à action
indirecte. Le pilote mesure la pression d'un réseau protégé par
l'intermédiaire d'une tubulure de mesure de pression à distance. Une
augmentation de pression du réseau protégé tend à fermer le pilote, au
contraire une diminution de pression du réseau protégé tend à l'ouvrir.
Réglage : visser la vis de réglage (2) pour augmenter la pression de
sortie.
2
3
4
PRESSURE REDUCING CONTROL
The pressure reducing control is a "normally open" control. An increase of
pressure tends to close the pressure reducing control, and a decrease of
pressure tends to open it.
Adjustment : turn the adjusting screw (2) clockwise to increase the outlet
pressure.
5
8
DRUCKREDUZIERVENTIL
9
Das Druckreduzier-Steuerventil ist eine sogenannte "Auf-Kontrolle" welche
die Schwankunden des sekundären Druckes am Ausgang des Hauptventils
misst. Eine Erhöhung des Druckes bewirkt die Schliessung des
Steuerventils; eine Druckminderung hingeben
12*
bewirkt seine Öffnung.
Einstellung : Regulierschraube (2) im Uhrzeigersinn drehen
um den Ausgangsdruck zu erhöhen.
22*
10
20*
11*
* = CLA-KIT
24
23*
21
17*
17*
16*
25*
16*
19*
18
13
14
13
CRA 0,1-0,5 bar
CRA 0,1-2,1 bar
Information
Domaine de réglage
Adjustement ranges
Einstellung
0,1-0,5 bar
0,1-2,1 bar
1,0-5,3 bar
2,1-21,0 bar
CLA-VAL Europe
CRA 1,0- 5,3 bar
CRA 2,1-21 bar
0,04 bar
0,2 bar
0,6 bar
1,9 bar
www.cla-val.ch
CRA STANDARD
CRA001LT
CRA/WWS
CRA003LT
CRA/IND
CRA004LT
CRA/OFS
CRA005LT
CRA/SWS
CRA002LT
CRA/AF
CRA006LT
[email protected]
1 - CRA001TT
B
09/03
CLA-VAL CRA
Pilote - Control - Steuerventil
PN 10 - 16 - 25
` STD: Standard
PIECE DE RECHANGE / SPARE PARTS / ERSATZTEILE
KIT DE REPARATION / REPAIR KIT / REPARATURSATZ
CLA-KIT CRA (0,1 - 0,5 / 0,1 - 2,1 bar)
CLA-KIT CRA (1,0 - 5,3 / 2,1 - 21,0 bar)
(a)
(b)
POS.
1
2
3
4
5
8
9
9.1
9.2
9.3
9.4
9.5
10
11
12
13
14
15
16
16.1
17
18
19
20
21
22
23
24
25
26
DESCRIPTION
Capuchon
Vis de réglage
Ecrou de blocage
Vis (8x)
Couvercle
Guide ressort
Ressort
0,1 - 0,5 bar (bleu)
0,1 - 2,1 bar (acier)
0,1 - 5,3 bar (rouge)
1,4 - 7,2 bar (acier)
2,1 - 21,0 bar (vert)
Ecrou
Rondelle de membrane
Membrane
Bouchon
Joint
Bouchon
Joint de siège
0,1 - 2,1 bar
Joint de siège
1,0 - 21 bar
Etrier
Corps 3/8"
Ressort 0,1 - 2,1 bar
Rondelle Belleville
Corps intermédiaire
Joint torique
Joint torique
Rondelle de membrane
Joint plat
Siège
TYPE CRA/STD
0,1 - 0,5 bar
0,1 - 2,1 bar
1,0 - 5,3 bar
CRA/KX 1,4 - 7,2 bar
2,1 - 21,0 bar
CRA/KX 2,1 - 21,0 bar
` CLA-VAL Europe
DESCRIPTION
Cap
Adjusting screw
Jam nut
Screw (8x)
Cover
Spring guide
Spring
0,1 - 0,5 bar (blue)
0,1 - 2,1 bar (steel)
0,1 - 5,3 bar (red)
1,4 - 7,2 bar (steel)
2,1 - 21,0 bar (green)
Nut
Diaphragm washer
Diaphragm
Plug body
Gasket
Plug
Disc retainer assembly
0,1 - 2,1 bar
Disc retainer assembly
1,0 - 21 bar
Yoke
Body 3/8"
Spring 0,1 - 2,1 bar
Belleville washer
Power unit body
O-ring
O-ring
Diaphragm washer
Gasket
Seat
CLA-VAL Nr.
SOL092-004
SOL092-001
SOL092-002
SOL092-007
SOL092-003
SOL092-006
www.cla-val.ch
BESCHREIBUNG
Schutzkappe
Regulierschraube
Sicherungsmutter
Schraube (8x)
Ventildeckel
Federführung
Feder
0,1 - 0,5 bar (blau)
0,1 - 2,1 bar (Stahl)
0,1 - 5,3 bar (rot)
1,4 - 7,2 bar (Stahl)
2,1 - 21,0 bar (grün)
Mutter
Membranscheibe
Membrane
Zapfen
Dichtung
Zapfen
Sitzdichtung
0,1 - 2,1 bar
Sitzdichtung
1,0 - 21 bar
Tragbügel
Gehäuse 3/8"
Feder 0,1 - 2,1 bar
Belleville Scheibe
Zwischen-Gehäuse
O-Ring
O-Ring
Membranscheibe
Gehäuse Dichtung
Sitz
*CKCRA-STD-01
*CKCRA-STD-02
MAT.
PLA
LTO
303
SST
LTO
302
CLA-VAL Nr.
67628J
71882-01D
67801-06J
67578-74A
C-2544K
71881H
302
SST
SST
316
SST
303
302
RBR
303
FIB
316
82575C
81594E
71884B
206321-01E
71885J
71883D
71891G (a/b)
C-1505B (a/b)
57153
40174F (a/b)
BGT2001
303
57996-11 (a)
303
57996-01 (b)
316L
BRZ
302
STL
LTO
RBR
RBR
LTO
NBC
316
58505
22205-01H
V-0558G (a)
70550-07E (a/b)
57454
00708J (a/b)
00746J (a/b)
C-1804J
80594-01D (a/b)
83396-03G
Standard PN 25
Standard PN 10 - 16
Standard PN 25
[email protected]
1 - CRA001LT
B 11/08
CLA-VAL CRA
Pressure Reducing Control
` Installation - Operation - Maintenance
`
3-
DESCRIPTION
The CRA Pressure Reducing Control automatically reduces a
higher inlet pressure to a lower outlet pressure. It is a direct
acting, spring loaded, diaphragm type valve that operates
hydraulically or pneumatically and is designed to sense
pressure from a remote point. It may be used as a selfcontained valve or as a pilot control for a CLA-VAL main valve.
It will hold a constant downstream pressure at the remote
sensing point within very close pressure limits.
`
OPERATION
The CRA Pressure Reducing Control is normally held open by
the force of the compression spring above the diaphragm;
delivery pressure acts on the underside of the diaphragm. Flow
through the valve responds to changes in pressure at the
sensing point.
`
INSTALLATION
The CRA Pressure Reducing Control may be installed in any
position. There is one inlet port and two outlets, for either
straight or angle installation. The second outlet port can be
used for a gauge connection. A flow arrow is marked on the
body casting.
`
ADJUSTMENT PROCEDURE
The CRA Pressure Reducing Control can be adjusted to
provide a delivery pressure range as specified on the
nameplate. Pressure adjustment is made by turning the
adjustment screw to vary the spring pressure on the
diaphragm. The greater the compression on the spring the
higher the pressure setting.
1Turn the adjustment screw in (clockwise) to increase
delivery pressure.
2Turn the adjustment screw out (counter-clockwise) to
decrease the delivery pressure. When pressure
adjustment is completed, tighten jam nut on adjustment
screw and replace protective cap.
Flow rates are not critical during pressure setting. The approximate
minimum flow rates given in the table are for the main valve on
which the CRA is installed.
Valve Size
Minimum
Flow l/s
1 1/4" -3"
4"-8"
10"-16"
0,95 - 1,9
3,15 - 12,6
19,0 - 41,0
` MAINTENANCE
DISASSEMBLY
To disassemble follow the sequence of the item numbers
assigned to parts in the sectional illustration (CRA001TT).
REASSEMBLY
Reassembly is the reverse of disassembly. Caution must be
taken to avoid having the yoke (17) drag on the inlet nozzle of
the body (18).
Follow this procedure:
1Place yoke (17) in body and screw the disc retainer
assembly (16) until it bottoms.
2Install gasket (14) and spring (19) for 2-30 psi range onto
plug (13) and screw into body. Disc retainer must enter
guide hole in plug as it is assembled. Screw the plug in
by hand. Use wrench to tighten only.
` CLA-VAL Europe
www.cla-val.ch
Place gasket (25) and POWERTROL body (21) on yoke
extension (17). Refer to sectional view for proper reassembly
of (21) onto body (18).
4Place lower diaphragm washer (24), o-ring (22), diaphragm
(12), upper diaphragm washer (11), and Belleville washer (20)
on yoke extension (17). Screw on diaphragm nut (10) finger
tight.
5Place two machine screws (4) through (21) (25) and screw
into body (18). Do not include the diaphragm (12) in this
operation. His holds parts aligned for next step, and allows the
diaphragm o move and be properly located during tightening
of nut (10).
6Hold the diaphragm so that screw holes in the diaphragm (12)
and POWERTROL body (21) align. Tighten diaphragm nut
(10) with a wrench. At the final tightening release the
diaphragm and permit it to rotate approximately 5° to 10°. The
diaphragm holes should now be properly aligned with the
body holes.
To check for proper alignment proceed as follows:
Rotate diaphragm clockwise and counter clockwise as far as
possible. Diaphragm screw holes should rotate equal distance on
either side of POWERTROL body screw holes ±1/8".
Repeat assembly procedure until diaphragm and yoke are properly
aligned. There must be no contact between yoke and body nozzle
during its normal opening and closing movement. To simulate this
movement hold POWERTROL body and diaphragm holes aligned.
Move yoke to open and closed positions. There must be no
evidence of contact or dragging.
7Remove machine screws per step 5-.
8Install spring (9) with spring guide (8) on top of spring.
9Install cover (5) using eight machine screws (4).
10- Replace adjusting screw (2) and nut (3), then cap (1).
SYMPTOM PROBABLE CAUSE
REMEDY
Fails to
No spring
Tighten adjusting screw
open when
compression
pressure
Disassemble and clean
Mineral build-up on
lowers
part, Replace o-rings (22)
yoke extension (17)
and (23)
Damaged spring
Disassemble and replace
Disassemble and place
Spring guide (8) is
guide (8) on top of spring
not in place
(9)
Disassembled and
Yoke dragging on
reassemble use
inlet nozzle
procedure
Fails to
Spring compressed
Back off adjusting screw
close when
Disassemble and clean
Mineral
deposit
on
delivery
part. Replace o-rings (22)
yoke extension (17)
pressure
and (23)
rises
Mechanical
Disassemble and remove
obstruction
obstruction
Disassemble, remove
Worn disc
and replace disc retainer
assembly (16)
Yoke dragging on
Refer to paragraph 6
inlet nozzle
Leakage
Damaged diaphragm
Disassemble and replace
from cover
(12)
vent hole
Loose diaphragm nut
Remove cover and
(10)
tighten nut
[email protected]
1 - CRA001SE
- 04/08

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