Cepex DN15 Manual

ENGLISH
1. DEFINITION
Diaphragm valve for regulating flow in liquid handling systems.
The valve is available with a PVC-U, CPVC or PP-H body and with EPDM or FPM membranes. The choice of materials will
depend on the type of liquid handled by the system and the operating temperature. See the chemical resistance chart
available at our website and the pressure/temperature diagram contained in this manual (G4.1) for further information.
The colour of the indicator at the end of the stem indicates the membrane material: blue = EPDM, green = FPM.
2. WARNINGS
• Carefully read these instructions before handling the valve and follow the recommendations. Damage caused by failure to read these
instructions is not covered by the warranty.
• Connections and handling operations must be carried out by qualified personnel.
• The maximum useful life of the valve is as specified in EN ISO 16138.
• Correct installation and handling of the valve, as well as adherence to the maximum pressure and temperature conditions specified in
this manual are essential for preserving the useful life of the valve.
• The liquid handled by the system must meet the chemical resistance requirements set out in the chart provided by Cepex in its tech-
nical catalogue.
• We do not recommend the use of tools on the handwheel when opening and closing the valve. Operate the handwheel manually,
using a cloth if necessary.
• Before carrying out any maintenance operations on the pipe or valve, ensure that the system is depressurised by releasing the pres-
sure and emptying the pipes.
• Turning the handwheel when the safety lock is in place could damage the valve.
• Avoid shocks during transport, since they may damage the body and mechanism of the valve. Keep the valve stored in the original
packaging, protected from damp and from direct exposure to sunlight.
• Before installation, check that the valve displays no signs of damage and that all parts required for installation are present.
3. COMPONENTS
4. TECHNICAL SPECIFICATIONS
Pressure / temperature diagram. (G 4.1)
Table of maximum and mini-
mum temperatures for each
r
material.(T4.1)
PVC-U
PVC-C
PP-H
0 10 20 30 40 50 60 70 80 90 100
32 50 68 86 104 122 140 158 176 194 212
Temperature
Temperature / Température / Temperatura / Temperatur
Pressure loss diagram (G 4.2)
1
0,1
0,01
0,001
1 10 100 1000
Flow (l/min)
Caudal (l/min)
Flow (l/min)
Maximum valve operating torque at nominal pressure
for the various diaphragm materials.
The values quoted for the maximum operating torque required on
the handwheel to completely close the valve are approximate and
are determined to ensure that the valve is completely closed with
water at nominal pressure and at a temperature of 20 ºC.
Nut tightening torques for the various diaphragm ma-
terials (20-G 3.1).
The torque values are approximate and are determined with no
pressure in the valve. Due to wear on the diaphragm, nuts may
need to be retightened with a higher torque value.
MANUAL A3.indd 1
DIAPHRAGM VALVE
Declaración de conformidad CE
EC Declaration of Conformity
El fabricante / the manufacturer: CEPEX S.A.U.
Avinguda Ramon Ciurans 40 (Parcel.la 6)
Polígon Industrial Congost
08530 LA GARRIGA
Declara que nuevas vávulas / declares that our valves:
Tipo/type: Válvula de Diafragma manuales / Manual Diaphragm valves
Modelo/Model: UP.89.SF1, UP.89.FT1, UP.89.SM1, UP.89.FLG1, UP.89.SF4, UP.89.FT4, UP.89.SM4, UP.89.FLG4
CP.89.SF1, CP.89.FT1, CP.89.SM1, CP.89.FLG1, CP.89.SF4, CP.89.FT4, CP.89.SM4, CP.89.FLG4
PPH.89.FTF1, PPH.89.BW1, PPH.89.MTF1, PPH.89.FLG1, PPH.89.BWP1,
PPH.89.FTF4, PPH.89.BW4, PPH.89.MTF4, PPH.89.FLG4, PPH.89.BWP4.
cumple con los requisitos establecidos por la UNIÓN EUROPEA para EQUIPOS A PRESIÓN según Directiva
97/23/CE (PED) de acuerdo con las normas harmonizadas :
- EN ISO 16138 VÁLVULAS INDUSTRIALES - Válvulas de diafragma de materiales termoplásticos
meets the requirements established by the European Union for PRESSURE EQUIPMENT according to Directive 97/23/
EC (PED) in accordance with the harmonized standards:
- EN ISO 16138 INDUSTRIAL VALVES - Diaphragm valves of thermoplastics material.
La marca CE sobre la válvula hace referencia a esta conformidad. Según la directiva 97/23/CE solamente las
válvulas mayores a DN25 pueden ir marcadas con CE.
The CE marking on the valve refers to this conformity. According to Directive 97/23/EC only valves larger than DN25
can be marked with CE.
Av. Ramon Ciurans, 40 - Pol. Ind. Congost - Parcel·la 6
08530 La Garriga (Barcelona) Spain
Tel.: +34 93 861 27 43 - Fax: +34 93 870 98 11
Website: www.cepex.com
E-mail: cepex@cepex.com
N PART MATERIAL
1 Stem PPO+GF
2 Diaphragm EPDM/FPM
3 Guide
4 Handwheel
5 Lower cover
6
Cover
7 Washer
8 Top cover
9 Safety lock
10 Label holder
11 Indicator
12 Screw cap
13 Indicator cap
14 Body PVC-U/CPVC/PP
15 PVC-U/CPVC/PP
End connector
16 Union nut PVC-U/CPVC/PP
17
Insert
18 DIN 931 screw Stainless steel
19 DIN 127 grower washer Stainless steel
20 DIN 934 nut Stainless steel
21 O-ring EPDM/FPM
Head losses table (T4.2)
Kv
DN15
155
Minimum Maximum
temperature temperature
DN20 158
PVC-U 0 ºC 60 ºC
DN25 292
CPVC 0 ºC 80 ºC
DN32 454
PP-H 5 ºC 80 ºC
DN40 648
DN50 871
Kv according to valve aperture.(G 4.3)
Flow / valve opening
Flow /valve opening
Caudal / Apertura
100
90
80
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60
% valve opening / % apertura % valve opening
Handwheel Valve size
tightening
torque N·m D20 D25 D32 D40
Dia- EPDM 3,5 3,5 6,5 6,5
phragm
material 4,5 6,5 6,5
FPM 4,5
Nut tightening Valve size
torque
N·m D20 D25 D32 D40
Dia- EPDM 4 4 6,5-7 6,5-7
phragm
material FPM 4 4 6,5-7 6,5-7
DIAPHRAGM VALVE
5. DIMENSIONS. CONNECTION TYPES.
Table of dimensions for all sizes. Connection types:
PVC-U and CPVC: metric male for solvent socket, US size male for solvent socket, flanges and 3-pieces connector with seal and thread (BSP
and NPT) connection coupling.
PP-H: metric male thermofusion, US size male thermofusion, flanges, 3-pieces connector with thermofusion, threaded (BSP and NPT) and
PE-100 and PP-H butt welded connection coupling.
Yasmin Fernádez
Director Calidad
La Garriga, Octubre 2012
Rev. 1.1 - OCTOBER 2012
DN A B C D-G E
DN15 133 96 90 20-½" 41
DN20 159 116 108 25-¾" 52
DN25 166 122 116 32-1" 60
DN32 192 140 134 40-1¼" 74
DN40 222 160 154 50-1½" 80
DN50 266 190 184 63-2" 100
*O1: PVC-U / CPVC metric.
*O2: PVC-U / CPVC US size.
*O3: PP-H metric.
*O4: PP-H US size.
6. INSTALLATION AND COMMISSIONING
Q
Before commencing the installation process, check that you have all the parts needed for the assembly of the valve and that the materials,
1
the connection type and the nominal pressure rating are suitable for the installation. For solvent socket or weld connections, you will also
need to check that the materials to be connected are the same and that the solvent or welding tools are suitable.
1
Test the correct operation of the valve's regulation system both before and after installation.
POM 1 To install the valve, follow the best installation practice recommendations provided on the Cepex website, paying particular attention to
the thermal dilation and alignment of pipes. The base of the valve's body has two threaded holes, allowing the valve to act as one of the
PP+GF 1
installation's fixed points.
The Cepex website also contains instructions for connecting the different types of valve connections: male solvent socket or 3-piece
PP 2
connector, thermofusion, butt welded, threaded with 3-piece connector and flanged connector.
PP+GF 1
When filling the pipes with liquid, check that all the air is purged from the system and that the initial pressure does not exceed the nominal
pressure of the valve or of the system element with the lowest nominal pressure rating.
POM 1
PP 1
7. OPERATION AND MAINTENANCE INSTRUCTIONS
PP+GF 1
We recommend checking the condition of the diaphragm on a regular basis, since it may display signs
ABS 1
of mechanical wear due to pressure, operation and contact with the liquid. With the valve closed, the
diaphragm may become loose and therefore need to be retightened to the torque value specified in table
PP 1
T4.3.
PP 4 We also recommend that you regularly check that the fixing nuts are tightened correctly, in accordance
with the recommended torque value specified in this manual (T4.4).
PC 1
The valve's degree of aperture can be set to a fixed position using the safety lock on the handwheel. To
activate it, simply pull the lock outwards until it fits into one of the set positions. If the safety lock does not
1
fit into any of the set positions, slightly rotate the wheel and pull the lock outwards again until the hole on
2
the lock is completely free. It is possible to use a padlock to secure the position.
2
8. REPLACING THE DIAPHRAGM
Brass 2
Before starting the diaphragm replacement process, first release all the pressure from the pipes that
4
connect to the valve. Then follow the steps set out below:
4
1. Fully open the valve by rotating the handwheel anti-clockwise.
4
2. Remove both of the valve's lower covers (5): press on the sides and pull, as shown in the diagram.
2
3. Release the 4 fixing screws (20) and remove the nuts and washers (19).
4. Pull on the top part of the valve by the handwheel to remove it from the body. This part will
contain the fixing screws (18).
5. We recommend that your remove the threaded stem (1) and the diaphragm (2) together from the
upper body by rotating the handwheel clockwise.
Cv
6. For D20 and D25 valves, you can remove the diaphragm by pulling on it carefully, ensuring that
it is removed in one piece.
10,85
7. For D32, 40, 50 and 63 valves, unscrew the diaphragm in an anti-clockwise direction, supporting
11,06 the stem until the diaphragm is fully removed.
8. For D20 and D25 valves, replace the diaphragm by pressing it into the shaft. Grease the button on
20,45
the diaphragm with a silicon based lubricant to facilitate assembly.
9. For D32, 40, 50 and 63, screw the new diaphragm in place.
31,76
10. Re-assemble the stem inside the upper body by screwing it anti-clockwise and ensuring the anti-
45,41
rotation wings and diaphragm are correctly positioned.
11. Assemble the body, replacing the four washers and tightening the four nuts using the torque
61
value specified in the relevant table.
12. Replace the lower covers by introducing them sideways.
Tabla T8.1
SPARE
MEMBRANE
D20
Dia- EPDM 54815R0002
phragm
material FPM 56784R0017
D20-25
70 80 90 100
9. TROUBLESHOOTING
PROBLEM
D50 D63
The valve does not open fully.
12-13 12-13
12-13 12-13
T 4.3
Liquid passes through the valve when it is closed.
D50 D63
A leak has been detected in the diaphragm area
9-10 9-10
between the upper and lower body.
9-10 9-10
T 4.4
F G H I J K L M N *O1
27 144 81 25 (M6) 71 130 118 12 65 90
27 144 81 25 (M6) 71 150 136 13 75 105
38 189 96 26 (M6) 85 161 145 15 85 108
38 189 96 45 (M8) 95 181 163 16 100 120
51 252 130 45 (M8) 115 200 184 17 110 130
51 252 130 45 (M8) 115 230 212 18 125 147
*R1: PP-H body with PE-100 and PP-H butt welded connection
coupling.
Valve size
D25 D32 D40 D50 D63
54815R0002 56659R0002 56659R0002 56671R0002 56671R0002
56784R0017 57243R0017 57243R0017 57293R0017 57293R0017
D32-40 D50-63
CAUSE
The diaphragm is damaged in the threaded stem
seating area.
Solid particles are preventing the valve from closing
completely.
The valve is not completely closed.
The fixing screws have become loose or have not
been tightened using the appropriate tightening
torque.
The diaphragm has split due to fatigue.
Threaded end connector BSP/NPT
*O2 *O3 *O4 P Q R *R1 Z
87 93 80 14 90 124 182 4x14
105 110 93 14 105 144 202 4x14
106 116 96 14 108 154 216 4x14
120 131 110 18 120 174 236 4x18
136 144 123 18 130 194 282 4x18
162 166 147 18 147 224 322 4x18
T 5.1
LOCK
SOLUTION
Remove the valve and replace the
diaphragm and the stem if necessary.
Remove the upper body of the valve and
clean the diaphragm.
Turn the handwheel clockwise with
the specified torque until the valve is
completely closed.
Re-tighten the fixing nuts with the
recommended torque value.
Replace the seal as specified in this manual.
T 9.1
11/12/2012 12:57:55