Cla-Val 64673H 4"-16" Restriction Fitting

The Cla-Val 64673H 4"-16" Restriction Fitting is a flow-control part that limits fluid passage within piping systems by introducing a calibrated restriction. It helps maintain stable pressure and controlled flow rates across varying operating conditions. In HVAC systems, it is commonly used in hydronic circuits such as chilled water, condenser water, and heating loops to balance system hydraulics and ensure proper distribution. Installed in-line within larger pipe sizes, it supports consistent system performance and allows for predictable flow across interconnected piping networks.