Neles PB2 Series, Инструкция по установке, обслуживанию и эксплуатации, Страница: 7 / 12

7 1PB270EN - 10/2020
5. ACTUATOR
WARNING:
BEFORE INSTALLING THE VALVE AND ACTUATOR, BE
SURE THAT THE INDICATOR POINTER ON TOP OF THE
ACTUATOR IS CORRECTLY INDICATING THE VALVE
POSITION. FAILURE TO ASSEMBLE THESE PRODUCTS
TO INDICATE CORRECT VALVE POSITION COULD
RESULT IN DAMAGE OR PERSONAL INJURY.
CAUTION:
When installing or servicing a valve/ actuator assembly, the best
practice is to remove the entire assembly from service.
CAUTION:
An actuator should be remounted on the valve from which it was
removed. The actuator must be checked and readjusted for proper
open and close position each time it is remounted.
WARNING:
THE VALVE BODY AND MOUNTING INTERFACE
HAS BEEN DESIGNED TO SUPPORT THE WEIGHT
AND OPERATION OF NELES ACTUATORS AND
RECOMMENDED ACCESSORIES. USE OF THIS
INTERFACE TO SUPPORT ADDITIONAL EQUIPMENT
SUCH AS PEOPLE, LADDERS, ETC. MAY RESULT IN THE
FAILURE OF THE VALVE OR ACTUATOR AND MAY CAUSE
PERSONAL INJURY.
WARNING:
BEWARE OF BALL MOVEMENT!
KEEP HANDS, OTHER PARTS OF THE BODY, TOOLS
AND OTHER OBJECTS OUT OF THE OPEN FLOW PORT.
LEAVE NO FOREIGN OBJECTS INSIDE THE VALVE OR
PIPELINE. WHEN THE VALVE IS OPERATED, THE BALL
FUNCTIONS AS A CUTTING DEVICE.
5.1 ACTUATOR MOUNTING
INSTRUCTIONS
1. When a spring-return actuator is being mounted, the valve should
be in the closed position for spring-to-close operation or in the
open position for the spring-to-open operation. When an electric
or double-acting pneumatic actuator is being mounted, the valve
position should correspond to the indicated actuator position.
2. Assemble actuator onto the valve, ensuring full engagement
between the stem and actuator drive, and the actuator fully
contacts the mounting face on the valve.
3. Tighten actuator mounting screws to the torque listed in
Table 2
.
CAUTION:
Do not exceed the tightening torque. Applying excessive tightening
torque can damage the aluminum threads in the actuator body.
TABLE 2
Torque to Aluminum Body Actuators
Bolt Size No Lubrication to Screws
mm N.m
M6 6.8
M8 15
M10 30
M12 52
M16 122
M20 230
4. Cycle actuator and verify proper ball position in both open and
closed positions. Adjust the actuator travel stops as necessary.
6. SERVICE / SPARE PART
We recommend that valves be directed to Neles service centers for
maintenance. The service centers are equipped to provide rapid turn-
around at a reasonable cost and offer warranty for reconditioning
based on condition of each valve.
NOTE: When sending goods to the service center for repair, do not
disassemble them. Clean the valve carefully and flush the valve
internals. Include the material safety datasheet(s) (MSDS) for all
media flowing through the valve. Valves sent to the service center
without MSDS datasheet(s) will not be accepted.
For further information on spare parts and service or assistance visit
our web-site at www.neles.com/valves .
NOTE: When ordering spare parts, always include the following
information:
a. Valve ype code as per technical bulletin and model
number from name plate,
b. the valve is serialized - the serial number (stamped
on the valve body or name plate) or applicable
manufacturing order number,