PRODUCTS FOR CO2 SYSTEMS

Product catalog summary

Introduction to CO2 in Refrigeration: The use of Carbon Dioxide (CO2, R744) in refrigeration and air conditioning is gaining popularity due to its non-toxic and non-flammable properties. It is considered a viable alternative to synthetic refrigerants, aligning with environmental protocols like the Montreal Protocol (1987) and the Kyoto Protocol (1999) aimed at reducing ozone depletion and greenhouse gas emissions.

CO2 System Applications: CO2 is used in various refrigeration systems, including:

Trans-critical Systems: Operate above the critical point (Tc = 31°C, 73.6 bars) using a gas cooler instead of a condenser, requiring solutions for high working pressures.
Sub-critical Systems: Used in cascade systems for low and medium/high temperatures, allowing reduced pressure cycles similar to traditional systems.
CO2 Pumped Systems: Utilized for medium/high temperatures, leveraging CO2's high thermal exchange properties with circulation ensured by a pump.
Combined Systems: Integrate sub-critical and pumped cycles for different temperature requirements.

Castel Products for CO2 Systems: Castel offers a range of products suitable for CO2 systems, particularly in sub-critical cycles, including:

Ball valves
Liquid indicators
Filter driers with replaceable solid core
Check valves
Safety valves
Expansion valves

These products are CE approved and designed for maximum working pressures of 45–52 bar.

Technical Specifications: The document provides detailed specifications for various components used in CO2 systems, including:

Safety Valves: Specifications include part numbers, connection types, orifice sections, discharge coefficients, set pressure ranges, and temperature limits.
Ball Valves: Details include part numbers, connection sizes, ball port diameters, flow coefficients (Kv), and pressure/temperature limits.
Check Valves: Information on connection sizes, flow coefficients, and operational limits.
Moisture Indicators: Specifications cover connection types, pressure, and temperature limits.
Filter Driers: Details on connection sizes, core types, nominal volumes, and operational limits.
Cartridges: Information on dehydrating charges and compatibility with filter driers.
PWM Expansion Valves: Specifications include orifice sizes, Kv factors, pressure differentials, and operational principles.
Coils: Details on voltage, frequency, consumption, and protection degrees.
Orifices: Rated capacities based on specific temperature conditions for refrigerant R744.

Catalog excerpts

PRODUCTS FOR CO2 SYSTEMS The employ of Carbon Dioxide (CO2, R744) in the refrigeration and air conditioning plants, is increasingly holding the interest of our field’s professionals, due to its no-toxic no-inflammable features. The need to reduce the pollution limiting the ozone layer thinning (Montreal, 1987) and the discharge out to the atmosphere of greenhouse effect causing gasses (Kyoto 1999) make of the employment of Carbon Dioxide one of the most valid alternative to Synthetic Refrigerants. Castel proposes a wide range of products opportunely modified to be suitable with CO2 systems; nevertheless...

Open the catalog to page 2

Safety valves Connections Outlet Part number 3030/44C 3030/66C 3/4” NPT 3030/88C 1” NPT 3060/23C 3060/24C 3060/33C 3060/34C 3060/45C 298 0.83 Package pcs Max 17 7 55 0.69 5/8” SAE 70.9 3/4” G 3/8” NPT Min 8 → 50 0.63 1/2” SAE 1/2” NPT TS [°C] PS [bar] 0.69 38.5 3/8” SAE 1/2” NPT Set pressure range [bar] 0.63 1/2” SAE 3/8” NPT 3060/36C 0.9 3/8” SAE 1/4” NPT 3060/46C 113 1.1/4” G 1/2” NPT Discharge coefficient Kd 3/4” G Inlet Orifice section [mm²] 78.5 -50 +150 45 9 → 50 0.45 0.92 24 0.93 Check valves Connections Part number ODS Kv [m³/h] Ø [in.] TS [°C] PS [bar] Ø [mm] 3138/5 5/8” 16 3138/6 3/4”...

Open the catalog to page 5

PRODUCTS FOR CO2 SYSTEMS

PRODUCTS FOR CO2 SYSTEMS

Catalog excerpts

All CASTEL catalogs and technical brochures

Archived catalogs