Cepex EXTREME Serie Montageanleitung Seite 8

In long periods of inactivity, and in case that the installation allows it, maintain the valve slightly open. It is recommended to force a
periodic movement to avoid the lock of the valve in long periods of time in closed position. It is advisable to pass the liquid before
maneuvering the valve.
The manual gearbox is maintenance-free and greased for life.
To operate the valve, unlock the handle (13) removing the pin (16) and pulling the lever (15) upwards, releasing its teeth from the throttle
plate (15), then turning the handle in the appropriate direction.
To lock the valve, insert the pin (16) and, optionally, secure with a padlock.
7.1 Replacing the Sealing Gasket
Should it be necessary to replace the sealing gasket, proceed as follows:
· Ensure that the system is depressurised by releasing the pressure and emptying the pipes, fo-
llowing the specific safety regulations of each product. Also check the temperature of the liquid
and follow safety standards of temperature.
· Remove the valve from the installation.
· Remove the handle as per 7.2, screws (24), nuts (25) and throttle plate (21).
· Remove the ring (9). Take off the cap (8) and remove the screw (14).
· Tap on the shaft (7) with a rubber mallet until the bearing (14) is exposed from the bottom (Fig. 7).
· Once the bearing is out, remove the shaft (7), turn it and re-insert it (Fig. 8) from the bottom.
· Tap again until the bearings (5 and 6) emerge from the top. Remove the shaft again.
· Remove the disc by pressing in the direction of the fluid.
· Remove the sealing gasket. Fit the new sealing gasket; it needs to be warped and placed so that it
lines up with the shaft, according to the indication tab of the gasket (Fig. 9).
WARNING: Before installing the new gasket, check the condition of the O-rings (10, 11 and 13).
7.2 Assembling and Removing the Handle
To assemble the handle:
Fit the handle on the shaft while holding the lever. Place it so that, with the valve closed, the handle indicator
shows 90º on the throttle plate (21).
Fit the washer (16), screw (26) and cap (23).
To remove the handle:
Remove the round cap (23) from the handle, the screw (26) and the washer (16).
Press the lever (17) fully upwards so that its teeth are fully disengaged from the teeth on the throttle plate (21).
Remove the handle from the shaft (7).
8. TROUBLESHOOTING
FAULT
The disc does not fully open or
close.
Excessive opening or closing
torque.
The valve is not fully watertight at
the sockets.
The valve is not completely
watertight at the sealing gasket.
8
EXTREME BUTTERFLY VALVE: LUG TYPE
T 8.1
POSSIBLE CAUSE
The sockets were not correctly bevelled.
Foreign materials in the compartment (adhesive, etc.).
The valve has been inactive for a long time.
Overtemperature or chemical attack cause damage to
the gasket.
Excessive flange torque.
Misalignment between sockets and valve.
Misalignment between sockets and valve.
Flange screws not tight enough.
The installation of the screws is not correct.
Inadequate chemicals.
Temperature out of range.
Excess pressure.
Conduction of abrasive elements.
Damaged sealing gasket.
Excessive working pressure.
Fig. 7
Fig. 9
FAULT CLEARANCE
Disassemble the valve and bevel the sockets as indicated in
table T6.2.
Disassemble the valve and check for obstructions in the disc
and gasket contact area.
Operate with an auxiliary release key (not plastic handle).
Disassemble the valve and lubricate the sealing gasket.
Check the chemical compatibility of the liquid with the disc
and the working temperature. Replace the gasket.
Tighten flanges as indicated in section 6.
Disassemble the valve and reassemble with concentric
alignment (observe the correct tightening sequence and
torque).
Disassemble the valve and reassemble with concentric
alignment (observe the correct tightening sequence and
torque).
Tighten flanges as indicated in section 6.
Check that the iserts and the screws have the same type
of thread and be sure that the lenght of the screw is not
excessive. Check also the dirty in the threads.
Check compliance with the specifications in this document.
Replace the gasket.
Check that the working pressure does not exceed the
maximum pressure depending on the type of installation
(end-of-line).
ENGLISH
Fig. 8