EN - 5
OMAL S.p.A.
Headquarters: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy • Production Site: Via Brognolo, 12 - 25050 Passirano (BS) Italy
Rif. UMA0082W - 10/19
ITENDEFRES
INSTRUCTION MANUAL
BUTTERFLY VALVES
ITEM 375 - 376 -377 , 385 - 386 - 387
A) DIRECT MOUNTING
Valve actuator direct mounting is the best solution to avoid plays between valve stem and actuator drive shaft. For a direct mounting
you should have the same standard ange connection on valve and actuator as well as the valve stem dimensions that t perfectly
with the actuator drive. Before installation please verify that the actuator and valve ange ISO connections are the same size; verify
that the valve stem size and shape is suitable for direct mounting, if necessary use a drive reduction. Fit the valve stem into the actua-
tor drive shaft connection, and bolt together the two ISO anges.
B) MOUNTING PLATE CONNECTION
In case direct mounting is not possible cause of little differences in actuator/valve anges or drives sizes, mounting plates adapters
with suitable anges dimensions allows an easy connection living a sufcient space for the valve/actuator drive adapter.
C) BRACKET & JOINT CONNECTION
Wherever for technical reason the plant installation requires a distance between actuator and valve, or the valve ange and/or stem
are not standard, and in any case, where the valve/actuator connection could not be possible, a bracket and joint is the right answer.
The Bracket is a steel bridge that allows to connect the valve with is own ange connection in one side and with the suitable actuator
connection into the opposite side, living a space in between for a steel joint connection.
The joint allows a drive connection between the actuator and the valve stem indispensable in case of stem key drive and at head.
Chose the suitable ange bracket and the required joint connections to x the actuator onto the valve very tight without any plays.
OMAL actuator with its draining channels system on the ange connection pattern is especially designed for valve direct mounting.
This system allows to drop away any possible ow coming from the valve stem that with valve/actuator direct mounting could damage
the actuator.
Coppia di serraggio delle viti
SIZE TORQUE Nm
M5 5-6
M6 10-11
M8 20-23
M10 45-50
M12 80-85
3.2.1 Cycle time
The cycle time depends on the operating device put on the valve. Please read the instructions about the installed actuator. The inter-
face between valve and actuator complies with ISO 5211
3.2.2 Valve stroke
the construction type of the valve (centric drive) guarantees the seal a few degrees before complete closure, depending on the size.
The actuated valves are adjusted during assembly to limit the actuator closing to 87 ° - 88 °, an angle that allows the valve seal to
the nominal pressures, avoiding unnecessary increase of the drive torques. Increasing the run up to 90 °, provide a long life of the
product in service
The stroke adjustment up to 90 °, allows the recovery of the wear of the gaskets greatly increasing the life of the product.
For the assembly of valves with actuators and actuator stroke adjustment refer to the specic documentation available on the website:
www.omal.it
4. SAFETY INFORMATION
• When you receive a product, make sure it is in perfect conditions. Do not install a product which comes in a damaged box
especially if it shows signs of damage.
• While the valve is being installed, make sure that the pipeline and the working environment are perfectly clean. The presen-
ce of dirt and particles can seriously affect the tightness of the valve. If you use a sealing product, either tape or paste, make sure that
it will not end up in the valve body or in the sealing areas.
• If an aggressive or dangerous uid ows through the valve, make sure the material the valve is made of is compatible with
the uid. If you have any doubt, please contact OMAL technical staff who will carefully evaluate the chemical compatibility of the uid
with the valve.
