Installation And Commissioning - Cepex PVC-U Manual Del Usuario

5.

INSTALLATION AND COMMISSIONING

Before starting the installation process, check that all the parts needed for the valve assembly are there, and that the materials,
connection type and nominal pressure are suitable for the installation.
For solvent or welded connections, ensure also that the parts to be connected are of the same material and that the correct solvent
or welding tools are used.
To install the valve, follow best installation practice recommendations provided on the Cepex website, paying specific attention to
thermal expansion and pipe alignment.
When filling the pipes with liquid, check that all the air has been 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.
Valve assembly using standard ISO-DIN, ANSI, JIS and BS/E flanges. Flat gaskets are not needed in the socket couplings, as they are
incorporated in the valve itself. Observe the tightening sequence of the screws on the flanges (Fig. 6) and the maximum tightening
torque. All screws must be used in the flange in order to ensure proper operation of the valve.
The PP/PE sockets for butt welding must be chamfered as indicated in the diagram (Fig. 7) and table (T5.2), to ensure correct
opening and closing of the disc.
Install the valve once the sockets are solvent-bonded and dry, to avoid problems with the adhesive (entry of the latter into the
valve).
Flanges must be well centred on the valve (pay special attention to measurements DN100-DN125 and DN200). Misalignment on
assembly could cause problems with the valve operation.
Fig. 5
Fig. 6
8
INDUSTRIAL PNEUMATIC BUTTERFLY VALVE
Fig. 7
PP/PE sockets
Screws and screw tightening torque
D DN inch
63 50
75 65 2 1/2"
90 80
110 100
125 125
140 125
160 150
200 200
225 200
250 250
280 250
315 300
DN
Pipe and chamfer
measurements 65
T 5.2
80
100
125
150
200
250
300
T 5.1
Screws (A2) Torque
(N·m)
- 4xM16x120 25
4xM16x140 25
3" 8xM16x150 25
4" 8xM16x160 30
- 8xM16x170 35
5" 8xM16x170 35
6" 8xM20x200 40
- 8xM20x210 50
8" 8xM20x230 50
- 12xM20x270 80
10" 12xM20x270 80
12" 12xM20x310 80
D min. x
50.5 30º
70 30º
91.5 30º
113 30º
141 30º
191.5 20º
226 20º
296.5 20º
ENGLISH
Torque
(inch·lbs)
221
221
221
265
310
310
354
442
442
708
708
708