Installation And Commissioning - Cepex 32614 Manual De Instrucciones

6.

INSTALLATION AND COMMISSIONING

Before starting the installation process, check that you have all the parts needed for the valve assembly, 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 you are using the
correct solvent or welding tools.
To install the valve, follow best installation practice recommendations provided on the Cepex website, paying particular attention to
thermal expansion and pipe alignment.
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.
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. 5) and the maximum
tightening torque. It is essential that all the screws are installed 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. 6) and table (T6.2), 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). Assembly
misalignment could cause problems with the valve operation.
Fig. 4
It must be screwed all the holes in the flange, even without
correspondence in the valves
7. OPERATION AND MAINTENANCE INSTRUCTIONS
It is recommended that the condition of the sealing gasket is checked regularly, since it may display signs of mechanical wear due
to pressure, handling and contact with the liquid. The sealing gasket should be greased in the disc contact area (the grease must
be compatible with the materials of the gasket and the disc). It is also advisable to check regularly that the flange fixing nuts are
tightened correctly, as per the recommended torque values specified above (T6.1).
In long periods of inactivity, and in case that the installation allows it, maintain the valve slightly open.
The manual gearbox is maintenance-free and greased for life.
To operate the valve, unlock the handle (9) removing the pin (16) and pulling the lever (8) upwards, releasing its teeth from the
throttle plate (7) then turning the handle in the appropriate direction.
To lock the valve, re-insert the pin (16) and, optionally, secure with a padlock.
6
STANDARD BUTTERFLY VALVE
Fig. 5
Screws and screw tightening torque
D DN inch Screws (A2)
63 65 - 4xM16x120
75 65 2 1/2" 4xM16x140
90 80 3" 8xM16x150
110 100 4" 8xM16x160
125 125 - 8xM16x170
140 125 5" 8xM16x170
160 150 6" 8xM20x200
200 200 - 8xM20x210
225 200 8" 8xM20x230
250 250 - 12xM20x270
280 250 10" 12xM20x270
315 300 12" 12xM20x310
ENGLISH
T 6.1
Torque Torque
(N·m) (inch·lbs)
25 221
25 221
25 221
30 265
35 310
35 310
40 354
50 442
50 442
80 708
80 708
80 708