Water Distribution System MT WDS 04

Flow Diversion Valves (FDV) :
There are two types of Flow Diversion Valves:

• Manually operated
• Air or Electrically operated (Automatic / Actuated valves)

Flow Diversion Valves are used to divert flow, as they have three ports in which one is inlet and other two are outlets. These valves may be 3-way ball valve, 3-way diaphragm valve or 3-way dumping or piston valve. FDV reduces the number of valves, as there are two outlets, which can be hooked up to two different lines. FDV’s are to be mounted in such position for 100% drain ability. The dead legs are minimized, as valves and fittings are reduced. FDV’s are used as dumping valve when conductivity fails in the recirculation loop.

Air or Electrically operated FDV’s (Automatic / Actuated valves) are used when the manual operations are to be replaced by control panel operations, but the utilities like air or electricity has to be incorporated besides the valves. The utilities required for the automatic valves are 4-6 kg/cm2 for air & 23VAC/DC or 230VAC for electricity.

• Design Qualification (DQ)
• Installation Qualification (IQ)
• Operational Qualification (OQ)
• Performance Qualification (PQ)

1. Design Qualification includes designing of the generation & distribution system. Generation system means the raw quality water to final quality of water required by the end user. Distribution system means to maintain & circulate the generated quality of water, and to maintain the minimum velocity in the return line.
2. Installation Qualification includes the installation of generation & distribution system. It means that the installed equipments are as per design with the same material of construction specified during designing. All the calibration certificates, material test certificates, mother instrument calibration certificates, drawing of all equipments & distribution loop.
3. Operational Qualification includes the operation of generation & distribution system. It means that the utilities required for the specified equipments are as per the design qualification. It also includes the functioning of all the electrical & pneumatic equipments through the control panel or PLC.
4. Performance Qualification includes the performance of the generation & distribution system. It means that the installed equipments are giving the same performance as specified in the design. The validation executives check all quality and quantity of generated and distributed water as per design qualification.