Table of Contents
The Method Statement of Control Valves and Actuators for Installation HVAC System is a comprehensive document that outlines the step-by-step approach and procedures for selecting and installing control valves and actuators in a Heating, Ventilation, and Air Conditioning (HVAC) system.
Purpose
Present a clear and concise method for ensuring the appropriate control valve is utilized.
Firstly, verify that the HVAC system’s components are accurately selected and installed in their designated locations.
Furthermore, establish a method to guarantee the accurate selection and installation of the suitable actuators for each control valve assembly.
The objective of this procedure is to establish a precise approach for ensuring the accurate selection and proper installation of all control valves. The aim is to ensure that the assemblies meet the contract documents’ requirements and adhere to the specified standards.
Method Statement of Control Valves and Actuators for Installation
To ensure that no errors are made during the correct valve selection, placement, and installation of all the control valves and actuators assembly, the procedure listed below will be followed.
The valve tag numbers can be linked to the plant reference numbers using the valve schedules. Tag numbers and plant reference numbers must be accurately paired with those depicted on construction plans.
If there is a difference between the contractor’s drawing and the schedule, before moving further with the installation of the control valves, the technical department will be contacted and any confusion will be cleared up.
All valve labels must be the correct size (or an equivalent size that has been approved), and if applicable, they must be attached with key rings in the upper corners that are suspended from brass or stainless steel chain loops over the appropriate valve or nearby pipe.
Samples of the tagging will be sent to the client for evaluation and approval prior to installation.
Tag numbers will be clearly connected to each valve and will be clearly indicated on the valve packing box before delivery in order to further minimize any potential errors. The valve schedule should include System Reference, Type of Fluid, Valve Number, Size, and Manufacturer to ensure that a valve is correctly selected before being tagged.
The valve part numbers for each type of valve are listed in the valve specification schedules.
The valve adds further qualification to this part number. To make it simple to identify valves during tagging, the part number, which is generic for all permitted control valve types, will be imprinted onto the brass valve body.
The schedules also include the actuator part number. For each specific type of control valve, these are also generic. The actuator’s part number will be prominently displayed, and when it is delivered, it must be packaged as a separate unit with the specific valve to which it is connected.
Each control valve specific assembly will have the correct valves.
Selected utilizing the MEP contractor’s drawings, the system valve schedule, and the commissioning set schedule.
The valve orifice body will be imprinted with L or M to identify the three various types of commissioning sets.
- L stands for “Low Flow”
- M stands for “Medium Flow”
- There is no impression, which means “Standard Flow”
When a person’s name is on a piece of paper, it’s important to know that they’ve got a good reason to be there. For the stage of installation, these will be tagged and kept ready. They will be identified by their tag numbers on the contractors’ drawings and commissioning valve schedule.
Where applicable, actuators will be installed in accordance with the manufacturer’s recommendations.
Mount the actuator to the valve body’s shaft and tighten the threaded nut by hand. Verify that the rotation is correct.
Two sheet metal screws are used to secure the mounting bracket.
Secure the clamp nut by tightening it.
For full mobility, adjust the mechanical stopper.
For protection against water intrusion, cover the actuator with plastic.
For connecting to the closest junction box, a lead wire cable measuring one meter is available.
The material submittal includes the manufacturer’s exploded image of the valve and actuator.
Inspection
In accordance with the approved system Commissioning Valve Schedule, a final inspection will be performed after site installation assembly of the control valve before pre-commissioning and the valve will then be tagged.
The aforementioned procedure will clear up any misunderstandings and make control valve and actuator installation and commissioning simple.
Reference Materials
Valve Schedule
Construction Drawings
Commissioning Valve Schedule
Manufacturers’ Instructions
tag: # Method Statement of Control Valves and Actuators for Installation HVAC System
