Episode 433: CO2 High Pressure Valves: How They Work
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Episode 433: CO2 High Pressure Valves: How They Work
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In this episode, we're breaking down how CO2 high pressure valves (HPV) work. We'll cover basic operation and design, as well as tips on proper settings, sensor placement and protection, fine-tuning for climate, and using trend graphs to diagnose issues. We'll also discuss the role of an HPV in receiver/flash tank protection versus gas cooler control across transcritical, transition, subcritical, and holdback modes.
In this episode, we discuss:
00:48 High Pressure Valve Basics
05:07 Gas Cooler Sensor Setup
06:58 Receiver Pressure Protection
12:26 Gas Cooler Control Modes
16:48 Winter Flooding Holdback
19:39 Trend Graph Diagnostics
Helpful Links & Resources:
Episode 318. Designing High Pressure Valves for Summer Heat and Winter Challenges with Chris Griffiths
Episode 144. Troubleshooting CO2 High Pressure Valves Using Trend Graphs with the CAREL Boss System
Episode 58. CO2 High Pressure Valves, Flash Gas Bypass and Ejectors controlled by a pRack300T