This topic set a clear and specified procedure for selecting and installing the appropriate control valve in the correct position in the HVAC system.
Installation of Control valve and actuators:
The following procedure will be followed to ensure that no mistakes are made regarding the proper collection, positioning and installation of all control valves and actuators assembly at the installation point.
-
The valve tag numbers can be linked to the reference numbers of the plant using the Valve Schedules. The combination of the tag numbers and the reference numbers of the plant will fit those shown on the design drawings correctly.
-
If there is a difference between the plan and the drawing of contractors. The technical team will be consulted and any misunderstanding will be addressed before the Control Valves can begin to be installed.
-
All valve labels shall be as defined (or permitted equivalent size) and shall be fixed over the appropriate valve or adjacent pipe by means of a key ring in each upper corner suspended from brass or stainless steel chain loops. Samples of labelling will be sent to the customer for review and approval to be taken before deployment.
-
To order to eliminate any possible errors, tag numbers will be shown at delivery on the valve packing box as well as clearly attached to each valve. To ensure that a valve is properly selected before labeling, system reference, type of fluid, number of valve, size and manufacturer should be indicated in the valve schedule.
-
The schedules for the valve specification show the number of valve parts for each valve type. The valve further confirms this part number. The part number is common for all licensed valve styles and is pressed onto the valve body of the brass to allow simple valve identification when marking.
-
The number of the actuator component is also shown on the schedules. For each specific type of valve control, these are also common. The part number will be clearly indicated on the actuator and bundled with the particular valve to which it is coupled when shipped as a detachable package.
-
The right valves for each different control valve assembly are chosen using MEP contractors drawings, machine valve schedule and schedule for commissioning.
-
The three different types of commissioning sets can be identified by imprinting on the valve orifice body with L or M.
Installation of actuator:
Installation of the actuator should be based on the manufacturer’s recommendation:
-
Mount the actuator to the valve body shaft and manually adjust the stuck nut. Test the proper rotation.
-
Fix two sheet metal screws to the mounting bracket
-
Fasten clamp nut for security.
-
Change the full movement mechanical stopper.
-
Protect the actuator from water intake with plastic cover.
-
A meter long lead wire cable is provided for connecting to nearest junction box.
-
Manufacturer’s exploded view of the valve and actuator is within material submittal