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List of products by brand Castel

We offer components from Castel Engineering for professional refrigeration and air conditioning work. Their range focuses on practical installation and finishing solutions used in cold rooms, freezers and cleanrooms, as well as accessories for heat pumps and split air conditioning units.

If you’re maintaining an existing installation or building a new project, the right profiles, ducts and protective elements help improve hygiene, durability and day-to-day usability.

Castel 1132/04 G 1/2″ Cooling-Water Solenoid Valve NC with HM2 Coil Castel 1132/04 G 1/2″ Cooling-Water Solenoid Valve NC with HM2 Coil

Castel 1132/04 G 1/2″ NC Cooling-Water Solenoid Valve HM2

Achieve precise flow control in your HVAC, refrigeration, and chiller water loops with the Castel 1132/04 solenoid valve. Its normally-closed, direct-action design ensures immediate shut-off when de-energized, while the HM2 continuous-duty coil and epoxy-sealed housing offer superior resistance to moisture and corrosion. Features & Benefits...
€96.66
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Castel Nut ¼″ SAE for 6 mm Cooling Tubing – Model 7010/22 Castel Nut ¼″ SAE for 6 mm Cooling Tubing – Model 7010/22

Castel Nut ¼″ SAE for 6 mm Cooling Tubing

Achieve leak-proof connections in your refrigeration, air-conditioning, and chilled-water circuits with the Castel Nut ¼″ SAE for 6 mm ODS tubing. Its precision-machined brass construction and standard ¼″ SAE threads ensure a secure seal under high-pressure conditions. Features & Benefits Standard ¼″ SAE Threads: Fits common cooling-system ports ODS...
€2.44
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Castel DI316N/4 Cooling-Line Filter with Humidity Indicator Castel DI316N/4 Cooling-Line Filter with Humidity Indicator

Castel DI316N/4 Cooling-Line Filter with Humidity Indicator

Ensure dry, contaminant-free refrigerant flow in your cooling systems with the Castel DI316N/4 Cooling-Line Filter. Its integrated humidity indicator provides instant visual feedback on moisture levels, while efficient condensate separation protects downstream equipment. Features & Benefits Built-In Humidity Indicator: Color-change sight...
€62.20
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Castel Humidity Indicator ½″ FM SAE – Models 3950/44 & 3750/44 Castel Humidity Indicator ½″ FM SAE – Models 3950/44 & 3750/44

Castel Humidity Indicator ½″ FM SAE for Cooling Systems

Maintain dry, contaminant-free refrigerant flow in your cooling circuits with the Castel Humidity Indicator ½″ FM SAE. These Italian-made indicators feature robust brass bodies and an integrated color-change sight glass for instant moisture detection. Features & Benefits Dual Models: 3950/44 & 3750/44 to suit system preferences...
€32.73
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Castel Humidity Indicator ¼″ MM SAE – Models 3910/22 & 3710/22 Castel Humidity Indicator ¼″ MM SAE – Models 3910/22 & 3710/22

Castel Humidity Indicator ¼″ MM SAE for Cooling Systems

Protect your refrigeration and HVAC loops from moisture damage with the Castel Humidity Indicator ¼″ MM SAE. These Italian-made indicators feature precision brass bodies and an integrated color-change sight glass for instant moisture detection. Features & Benefits Dual Models: Choose between 3910/22 & 3710/22 Standard ¼″ MM SAE: Male...
€27.75
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Castel 5/8″ FM SAE Humidity Indicator (Models 3950/55 & 3750/55) Castel 5/8″ FM SAE Humidity Indicator (Models 3950/55 & 3750/55)

Castel 5/8″ FM SAE Humidity Indicator (Models 3950/55 & 3750/55)

Enhance your HVAC and refrigeration systems with the Castel humidity indicator featuring a 5/8″ FM SAE connection. Designed for fast, reliable moisture detection, this inline device provides clear, color-coded feedback—turning from blue to pink/red—to alert you instantly to moisture ingress. Instant Visual Alerts: Color change from...
€51.43
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Castel Humidity Indicator Ø 10 mm – Models 3940/M10 & 3740/M10 Castel Humidity Indicator Ø 10 mm – Models 3940/M10 & 3740/M10

Castel Humidity Indicator Ø 10 mm (3940/M10 & 3740/M10)

Keep your refrigeration and HVAC systems running smoothly with the Castel Ø 10 mm humidity indicator. Designed for fast, accurate moisture detection, this inline device provides clear, color-coded feedback—turning blue to pink/red—to alert you instantly to moisture ingress. Instant Color Alerts: Visual shift from blue to pink/red...
€41.67
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Castel Humidity Indicator Ø 3/8″ – Model 3940/3 Castel Humidity Indicator Ø 3/8″ – Model 3940/3

Castel Humidity Indicator Ø 3/8″ (Model 3940/3)

Keep your refrigeration and HVAC systems performing at their best with the Castel Ø 3/8″ Humidity Indicator (3940/3). This inline device offers fast, reliable moisture detection by changing color from blue to pink/red, giving you immediate insight into system health. Instant Color Alerts: See moisture ingress via a clear color...
€41.67
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Castel Nut 1/2″ SAE Ø 10 mm (Model 7030/4M10) Castel Nut 1/2″ SAE Ø 10 mm (Model 7030/4M10)

Castel Nut 1/2″ SAE Ø 10 mm (Model 7030/4M10)

Ensure leak-free performance in your refrigeration and HVAC systems with the Castel 1/2″ SAE Nut, featuring a precise Ø 10 mm internal thread. Manufactured from premium brass and finished for corrosion resistance, this nut delivers a secure seal under demanding conditions. Precision Machining: Guarantees a tight, leak-proof...
€2.85
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Castel Nut 1/2″ SAE Ø 12 mm – Model 7030/4M12 Castel Nut 1/2″ SAE Ø 12 mm – Model 7030/4M12

Castel Nut 1/2″ SAE Ø 12 mm (Model 7030/4M12)

Achieve secure, leak-free connections in refrigeration and HVAC systems with the Castel 1/2″ SAE Nut, featuring a precise Ø 12 mm internal thread. Engineered from high-quality brass with a corrosion-resistant finish, this nut provides dependable performance under demanding conditions. Precision Machining: Ensures a tight, leak-proof...
€2.85
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Castel Nut 1/2″ SAE Ø 3/8″ – Model 7020/43 Castel Nut 1/2″ SAE Ø 3/8″ – Model 7020/43

Castel Nut 1/2″ SAE Ø 3/8″ (Model 7020/43)

Maintain leak-free connections in your refrigeration and HVAC systems with the Castel 1/2″ SAE Nut, featuring a precise Ø 3/8″ internal thread. Crafted from high-quality brass with a corrosion-resistant finish, this nut provides durable, reliable performance under demanding conditions. Precision Engineering: Guarantees a secure,...
€2.85
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Castel Nut 3/8″ SAE Ø 10 mm – Model 7030/3M10 Castel Nut 3/8″ SAE Ø 10 mm – Model 7030/3M10

Castel Nut 3/8″ SAE Ø 10 mm (Model 7030/3M10)

Maintain secure, leak-free connections in your refrigeration and HVAC systems with the Castel Nut 3/8″ SAE, featuring a precise Ø 10 mm internal thread. Crafted from high-grade brass and finished for corrosion resistance, this nut provides dependable performance under demanding conditions. Precision Machining: Ensures a tight,...
€2.24
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Castel Nut 3/8″ SAE Ø 3/8″ – Model 7010/33 Castel Nut 3/8″ SAE Ø 3/8″ – Model 7010/33

Castel Nut 3/8″ SAE Ø 3/8″ (Model 7010/33)

Ensure secure, leak-free connections in your refrigeration and HVAC systems with the Castel Nut 3/8″ SAE, featuring a precise Ø 3/8″ internal thread. Crafted from premium brass and finished for corrosion resistance, this nut delivers dependable performance under demanding conditions. Precision Machining: Guarantees a tight, leak-proof seal. Standard 3/8″...
€2.24
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Castel Nut 3/8″ SAE Ø 6 mm – 1/4″ – Model 7020/32 Castel Nut 3/8″ SAE Ø 6 mm – 1/4″ – Model 7020/32

Castel Nut 3/8″ SAE Ø 6 mm – 1/4″ (Model 7020/32)

Simplify mixed-thread installations in your HVAC and refrigeration systems with the Castel reducing nut, featuring a 3/8″ SAE male thread and a Ø 6 mm (1/4″) female thread. Precision-machined from high-grade brass and finished for superior corrosion resistance, this component provides a secure, leak-proof connection under demanding conditions....
€2.24
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Castel Solenoid Valve Ø 3/8″ (Model 1028/3S) – Direct‐Action NC Castel Solenoid Valve Ø 3/8″ (Model 1028/3S) – Direct‐Action NC

Castel Solenoid Valve 1028/3S Ø 3/8″ – Direct‐Action NC

Enhance control over refrigerant flow in your HVAC and refrigeration equipment with the Castel Ø 3/8″ Solenoid Valve, model 1028/3S. Featuring a direct‐action normally‐closed design, this valve ensures rapid shut-off when power is removed, preventing unwanted leaks and safeguarding system integrity. Direct-Action NC: Reliable...
€51.23
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Castel Solenoid Valve 3/8″ SAE – Model 1064/3S Membrane NC Castel Solenoid Valve 3/8″ SAE – Model 1064/3S Membrane NC

Castel Solenoid Valve 3/8″ SAE (Model 1064/3S) – Membrane NC

Enhance control and safety in your refrigeration and HVAC systems with the Castel Solenoid Valve 3/8″ SAE (1064/3S). Its membrane-actuated, normally-closed design delivers rapid shut-off when de-energized, preventing leaks and protecting equipment. Membrane NC Operation: Immediate flow shut-off on power loss. 3/8″ SAE...
€67.79
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Castel Solenoid Valve 1/2″ SAE (Model 1070/4S) – Membrane NC Castel Solenoid Valve 1/2″ SAE (Model 1070/4S) – Membrane NC

Castel Solenoid Valve 1070/4S 1/2″ SAE – Membrane NC

Upgrade your HVAC and refrigeration systems with the Castel Solenoid Valve 1/2″ SAE, model 1070/4S. Designed with a membrane-actuated, normally-closed mechanism, it delivers instant shut-off when power is cut—protecting equipment from leaks and damage. Membrane NC Action: Immediate flow stop on de-energization for maximum safety....
€97.47
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Castel Solenoid Valve Ø 16 mm – Model 1078/5S Membrane NC Castel Solenoid Valve Ø 16 mm – Model 1078/5S Membrane NC

Castel Solenoid Valve Ø 16 mm (Model 1078/5S) – Membrane NC

Improve control and protection in your refrigeration and HVAC systems with the Castel Ø 16 mm Solenoid Valve, model 1078/5S. Its membrane-actuated, normally-closed design delivers instant shut-off when de-energized, preventing leaks and ensuring system integrity. Membrane NC Design: Immediate flow shut-off on power loss for leak...
€130.20
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Castel Straight Union U2-4 1/4″ SAE MM – Model 7110/2 Castel Straight Union U2-4 1/4″ SAE MM – Model 7110/2

Castel Straight Union U2-4 1/4″ SAE MM (Model 7110/2)

Achieve quick, secure connections in your refrigeration and HVAC systems with the Castel Straight Union U2-4 1/4″ SAE MM. Designed with dual male SAE threads, this union couples standard refrigerant lines with ease, providing a direct, reliable pathway for coolant flow. Straight-Through Design: Dual 1/4″ SAE male (MM) threads for straightforward...
€2.24
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Castel Straight Union U2-6 3/8″ SAE MM – Model 7110/3 Castel Straight Union U2-6 3/8″ SAE MM – Model 7110/3

Castel Straight Union U2-6 3/8″ SAE MM (Model 7110/3)

Achieve quick, secure inline connections in your refrigeration and HVAC systems with the Castel Straight Union U2-6 3/8″ SAE MM. Featuring dual male SAE threads, this union couples standard refrigerant lines directly, eliminating adapters and reducing potential leak points. Inline Coupling Design: Dual 3/8″ SAE male (MM) threads for...
€3.05
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Castel 3/8″ SAE Tap Valve for Tight Systems Castel 3/8″ SAE Tap Valve for Tight Systems

Castel 3/8″ SAE Tap Valve for Tight Systems

Simplify charging, vacuuming, and leak testing on compact refrigeration and HVAC lines with the Castel Tap for Tight Systems 3/8″ SAE. Its low-profile brass body, featuring an inlet ODF Ø 10 mm and a 3/8″ SAE outlet with side charging port, allows fast, secure access even in the tightest spaces. Space-Saving Profile: Compact design...
€29.48
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Castel Tee 1/4″ SAE MFM T6-4 Castel Tee 1/4″ SAE MFM T6-4

Castel Tee 1/4″ SAE MFM T6-4

Streamline your refrigeration and HVAC installations with the Castel Tee 1/4″ SAE MFM T6-4. This precision brass MFM fitting offers a solid, leak-proof branch connection for three standard 1/4″ SAE lines—ideal for service and diagnostics. Standard 1/4″ SAE Ports: Three-way MFM T6-4 configuration for versatile line routing....
€4.47
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About the brand

Castel Engineering manufactures plastic parts and profiles for the HVAC-R industry, with production know-how in injection moulding and profile extrusion. Their product focus is strongly “installer-first”: durable components that speed up installation, protect surfaces and create a clean, professional finish—especially in high-use environments like refrigerated rooms and technical areas.

The company is headquartered in Mouscron, Belgium, and operates within the broader DiversiTech Europe group.

Typical product areas you may need components for

Depending on the installation, Castel Engineering components are commonly used for:

  • Split AC / heat pump installation finishing (ducting and installation accessories)

  • Coldroom and cleanroom protection & hygiene (wall-to-floor hygienic profiles, panel protections, backing profiles)

  • Structural and mounting accessories (ceiling suspensions and related installation parts)

  • Storage and workspace builds (modular shelving solutions)

Why the right components matter

Correct HVAC-R accessories help maintain:

  • Hygiene and easy cleaning (especially in cold rooms and clean areas)

  • Impact protection for panels and high-traffic zones

  • A cleaner finish for visible installations (duct routing and tidy edges)

  • Long-term reliability by reducing wear, movement and damage