REFRIGERANT FLOW CONTROLS IN HVACR SYSTEMS Understanding Metering Devices, Applications, Advantages, and System Protection Every vapor-compression HVACR system requires a method of controlling refrigerant flow between the high-pressure and low-pressure sides of the system. This component is commonly called a: Refrigerant control Metering device Expansion device Refrigerant flow-control device The metering device performs two essential functions: It creates the pressure drop that allows high-pressure liquid refrigerant to enter the lower-pressure evaporator. It regulates the quantity of refrigerant entering the evaporator so that the coil can absorb heat without starving, flooding, or returning excessive liquid refrigerant to the compressor. Historically, six major types of refrigerant controls have been associated with HVACR system design: Thermostatic Expansion Valve Capillary Tube Automatic Expansion Valve High-Pressure-Side Float Valve Low-Pressure-Side Float Valve Electronic ...
Essential Codes & Standards for Every MEP / HVAC Engineer
A quick and complete reference list for HVAC, Fire Fighting, Plumbing, Electrical & Building Services engineers ⬇️🔵 HVAC Standards
ASHRAE – 15, 34, 55, 62.1, 90.1, 170
SMACNA – Duct construction & design
🔴 Fire Fighting & Fire Safety (NFPA)
NFPA 10 – Fire extinguishers
NFPA 13 – Sprinklers
NFPA 14 – Standpipes
NFPA 20 – Fire pumps
NFPA 25 – Inspection & maintenance
NFPA 72 – Fire alarm systems
🔧 Plumbing Standards
🚰 IPC – International Plumbing Code
🚿 UPC – Uniform Plumbing Code
⚡ Electrical Standards
NEC (NFPA 70) – National Electrical Code
IEC / IEEE – Electrical safety & systems
🔩 Mechanical & Piping Codes
ASME B31.1 / B31.3 – Piping systems
ASME Section VIII – Pressure vessels
API Standards – Oil & gas equipment
AWWA – Water supply systems
Refrigeration & IAQ
ASHRAE 15 / ISO 5149 – Refrigeration safety
ISO 817 – Refrigerant classification
ASHRAE 62.1 / 62.2 – Ventilation
ISO 16000 – Indoor air quality testingg
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