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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 Safety Valve 30 bar – ⅜″ NPT to ½″ SAE Castel Safety Valve 30 bar – ⅜″ NPT to ½″ SAE

Castel Safety Valve 30 bar – ⅜″ NPT to ½″ SAE

Safeguard your refrigeration and HVAC systems with the Castel 30 bar Safety Valve. Designed for precise pressure relief, this valve features a ⅜″ NPT inlet and a ½″ SAE outlet to discharge excess pressure safely and prevent system damage. 30 bar Relief Rating: Accurately calibrated to activate at specified overpressure....
€58.85
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Castel Solenoid Valve 1028N/2S Ø 6 mm – Direct-Action NC Castel Solenoid Valve 1028N/2S Ø 6 mm – Direct-Action NC

Castel Solenoid Valve 1028N/2S Ø 6 mm – Direct-Action NC

Optimize control of hydrocarbon refrigerants with the Castel Solenoid Valve 1028N/2S. Featuring a Ø 6 mm connection and a direct-action normally-closed design, this valve ensures rapid shut-off when de-energized to prevent leaks in R290 and R600 systems. Direct-Action NC: Reliable shut-off on power loss to safeguard against leaks. Ø 6 mm Connection:...
€48.48
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Castel Solenoid Valve 1028V/2S.E Ø 6 mm – Direct-Action NC Castel Solenoid Valve 1028V/2S.E Ø 6 mm – Direct-Action NC

Castel Solenoid Valve 1028V/2S.E Ø 6 mm – Direct-Action NC

Optimize safety and control in your HVAC and refrigeration systems with the Castel Solenoid Valve 1028V/2S.E. Featuring a direct-action normally-closed mechanism, this valve shuts off instantly when de-energized, preventing leaks and ensuring system integrity in R290 and R600 applications. Direct-Action NC: Reliable shut-off on...
€51.73
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Castel Solenoid Valve Ø 3/8″ – Model 1068/3S Membrane NC Castel Solenoid Valve Ø 3/8″ – Model 1068/3S Membrane NC

Castel Solenoid Valve Ø 3/8″ (Model 1068/3S) – Membrane NC

Improve control and safety in your refrigeration and HVAC systems with the Castel Solenoid Valve Ø 3/8″ (1068/3S). Its membrane-actuated, normally-closed mechanism ensures rapid shut-off when de-energized, preventing leaks and safeguarding equipment. Membrane NC Design: Fast-acting closure on power loss to avoid refrigerant escape....
€74.40
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Castel Solenoid Valve 5/8″ SAE – Model 1070/5S Castel Solenoid Valve 5/8″ SAE – Model 1070/5S

Castel Solenoid Valve 5/8″ SAE – Model 1070/5S

Enhance control and safety in your HVAC and refrigeration systems with the Castel Solenoid Valve 5/8″ SAE (model 1070/5S). Featuring a membrane-actuated normally-closed design, this valve ensures instant shut-off when de-energized to prevent leaks and protect equipment. Membrane NC Operation: Rapid shut-off on power loss for...
€108.75
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Castel Solenoid Valve Ø 1/2″ (Model 1078/4S) – Membrane NC Castel Solenoid Valve Ø 1/2″ (Model 1078/4S) – Membrane NC

Castel Solenoid Valve Ø 1/2″ (Model 1078/4S) – Membrane NC

Improve control and safety in your HVAC and refrigeration installations with the Castel Solenoid Valve Ø 1/2″ (1078/4S). Its membrane-actuated, normally-closed mechanism shuts off instantly when de-energized, preventing refrigerant leaks and protecting system components. Membrane NC Operation: Immediate flow shut-off on power loss....
€108.45
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Castel Straight Union U1-4A 1/4″ SAE × 1/8″ NPT MM Castel Straight Union U1-4A 1/4″ SAE × 1/8″ NPT MM

Castel Straight Union U1-4A 1/4″ SAE × 1/8″ NPT MM

Simplify line connections in your refrigeration and HVAC systems with the Castel Straight Union U1-4A. Featuring dual male threads—1/4″ SAE on one end and 1/8″ NPT on the other—this precision brass union delivers a reliable, leak-proof seal without adapters. Dual-Thread Design: 1/4″ SAE × 1/8″ NPT MM for direct hose-to-pipe...
€2.24
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Castel Straight Union U1-6C 3/8″ SAE × 3/8″ NPT MM Castel Straight Union U1-6C 3/8″ SAE × 3/8″ NPT MM

Castel Straight Union U1-6C 3/8″ SAE × 3/8″ NPT MM

Simplify your refrigeration and HVAC installations with the Castel Straight Union U1-6C. Featuring dual male threads—3/8″ SAE on one end and 3/8″ NPT MM on the other—this brass union delivers a secure, leak-proof connection without the need for adapters. Dual-Thread Design: 3/8″ SAE × 3/8″ NPT MM for direct line coupling....
€3.05
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Castel Straight Union U1-8D 1/2″ SAE × 1/2″ NPT Castel Straight Union U1-8D 1/2″ SAE × 1/2″ NPT

Castel Straight Union U1-8D 1/2″ SAE × 1/2″ NPT

Simplify your refrigeration and HVAC installations with the Castel Straight Union U1-8D. Featuring dual male threads—1/2″ SAE on one end and 1/2″ NPT MM on the other—this precision brass union delivers a secure, leak-proof connection without adapters. Dual-Thread Design: 1/2″ SAE × 1/2″ NPT MM for direct hose-to-pipe coupling....
€5.29
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Castel Straight Union U2-8 ½″ SAE MM Castel Straight Union U2-8 ½″ SAE MM

Castel Straight Union U2-8 ½″ SAE MM

Achieve fast, secure inline connections in your refrigeration and HVAC systems with the Castel Straight Union U2-8 ½″ SAE MM. Featuring dual male ½″ SAE threads (MM), this brass union couples standard refrigerant lines directly—no adapters needed. Inline Coupling Design: Dual ½″ SAE male (MM) threads for straightforward hose-to-hose...
€5.08
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Castel Straight Union U3-4A ¼″ SAE × 1/8″ NPT MF Castel Straight Union U3-4A ¼″ SAE × 1/8″ NPT MF

Castel Straight Union U3-4A ¼″ SAE × 1/8″ NPT MF

Simplify connections between SAE and NPT lines with the Castel Straight Union U3-4A. Featuring a ¼″ SAE male thread on one end and a 1/8″ NPT female (MF) port on the other, this precision-machined brass union provides a secure, leak-proof seal without adapters. Dual-Thread Design: ¼″ SAE male × 1/8″ NPT female MF for direct line...
€2.24
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Castel Weld Coupling ½″ SAE × Ø 12 mm Castel Weld Coupling ½″ SAE × Ø 12 mm

Castel Weld Coupling ½″ SAE × Ø 12 mm

Create permanent, leak-free joints in refrigeration and HVAC lines with the Castel Weld Coupling ½″ SAE × Ø 12 mm. Featuring a ½″ male SAE flare for service fittings and a smooth Ø 12 mm socket for copper tube welding, this coupling is machined from premium brass for precise fit and lasting reliability. Dual-End Design: ½″ SAE male...
€4.27
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Castel Blind Nut ¼″ SAE (Pack of 5) Castel Blind Nut ¼″ SAE (Pack of 5)

Castel Blind Nut ¼″ SAE (Pack of 5)

Seal off unused service ports and fittings in your refrigeration and HVAC systems with the Castel Blind Nut ¼″ SAE. Sold in packs of five, these brass blind nuts provide a reliable, leak-proof barrier against moisture and contaminants. ¼″ SAE Thread: Standard size for universal compatibility. Pack of 5 Nuts: Ample quantity for...
€10.98
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Castel Cartridge 4490/A – 800 cm³ Filter Drier Castel Cartridge 4490/A – 800 cm³ Filter Drier

Castel Cartridge 4490/A – 800 cm³ Filter Drier

Maintain optimal system performance and prevent moisture-related damage with the Castel Cartridge 4490/A. This inline filter drier features an 800 cm³ (48 cu in) desiccant core that efficiently removes water and particulates from refrigerant circuits. High Capacity: 800 cm³ desiccant volume for extended moisture trapping....
€25.71
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Castel Copper Cap ¼″ Castel Copper Cap ¼″

Castel Copper Cap ¼″

Keep your refrigeration and HVAC systems sealed and contaminant-free with the Castel Copper Cap ¼″. Crafted from high-purity copper and precision-machined to ¼″ SAE specifications, this cap provides a reliable metal-to-metal seal on service ports, preventing moisture ingress and refrigerant loss. Precision ¼″ SAE Thread: Guarantees...
€0.41
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Castel Double Swivel Sleeve US4-6 3/8″ SAE Castel Double Swivel Sleeve US4-6 3/8″ SAE

Castel Double Swivel Sleeve US4-6 3/8″ SAE

Achieve hassle-free hose and tube routing in your refrigeration and HVAC systems with the Castel Double Swivel Sleeve US4-6 3/8″ SAE. Featuring two independent swivel ends, this coupling lets you align connections without twisting or stressing lines—ideal for tight or awkward installations. Dual Swivel Ends: Independent 3/8″ SAE...
€12.91
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Castel Humidity Indicator ⅜″ MM SAE (Models 3910/33 & 3710/33) Castel Humidity Indicator ⅜″ MM SAE (Models 3910/33 & 3710/33)

Castel Humidity Indicator ⅜″ MM SAE (Models 3910/33 & 3710/33)

Protect your refrigeration and HVAC equipment from moisture-related damage with the Castel ⅜″ MM SAE Humidity Indicator. Featuring a built-in color-changing window, it provides clear, immediate alerts—turning from blue to pink/red—so you can perform maintenance before system performance is compromised. Instant Visual Feedback: Color...
€30.09
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Nut 5/8" SAE ø 14 mm – Fits Castel 7030/5M14, Olab 31003-04-M14 Nut 5/8" SAE ø 14 mm – Fits Castel 7030/5M14, Olab 31003-04-M14

Nut 5/8" SAE ø 14 mm for Refrigeration – Compatible with Castel and Olab

This 5/8" SAE nut for ø 14 mm copper pipe is designed for secure and robust connections in refrigeration and air conditioning systems. Engineered for high reliability, it is compatible with Castel and Olab reference codes and is suitable for use with a wide range of refrigerants as specified by ASHRAE 34:2019. Features SAE flare: 5/8" Copper pipe...
€6.06
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Nut 5/8" SAE ø 16 mm – Fits Castel 7010/55, Olab 31000-04 Nut 5/8" SAE ø 16 mm – Fits Castel 7010/55, Olab 31000-04

Nut 5/8" SAE ø 16 mm for Refrigeration – Compatible with Castel and Olab

This 5/8" SAE nut for ø 16 mm (5/8") copper pipes provides secure, leak-resistant connections for refrigeration and air conditioning installations. Designed for compatibility with reference codes from Castel and Olab, this nut meets ASHRAE 34:2019 requirements and works with a wide range of refrigerants. Features SAE flare: 5/8" Copper pipe diameter:...
€4.84
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Nut 3/4" SAE ø 5/8" – Fits Castel 7020/65, Olab 31002-05-04, Refco 9880822 Nut 3/4" SAE ø 5/8" – Fits Castel 7020/65, Olab 31002-05-04, Refco 9880822

Nut 3/4" SAE ø 5/8" for Refrigeration – Compatible with Castel, Olab, Refco

This 3/4" SAE nut for ø 5/8" (16 mm) copper pipe is engineered for robust, leak-resistant connections in refrigeration and air conditioning systems. Designed to fit widely-used reference codes from Castel, Olab, and Refco, this nut is suitable for installations using a full spectrum of ASHRAE 34:2019 approved refrigerants. Features SAE flare: 3/4"...
€10.00
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Nut 3/4" SAE ø 18 mm – Fits Castel 7030/6M18, Olab 31003-05-M18 Nut 3/4" SAE ø 18 mm – Fits Castel 7030/6M18, Olab 31003-05-M18

Nut 3/4" SAE ø 18 mm for Refrigeration – Compatible with Castel and Olab

This 3/4" SAE nut for ø 18 mm copper pipe is designed for robust, leak-resistant connections in refrigeration and air conditioning systems. Compatible with reference codes from Castel and Olab, it is ideal for professional installations using a wide range of ASHRAE 34:2019 approved refrigerants. Features SAE flare: 3/4" Copper pipe diameter: 18 mm...
€9.84
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Straight Union U2-10 5/8" SAE MM – Castel 7110/5, Olab 31005-04 Straight Union U2-10 5/8" SAE MM – Castel 7110/5, Olab 31005-04

Straight Union U2-10 5/8" SAE MM – Castel, Olab, Refco Compatible

The U2-10 straight union with 5/8" SAE MM connections ensures reliable, leak-free joining of refrigeration and HVAC lines. Compatible with Castel, Olab, and Refco references, this union is built for durability and easy installation in professional and industrial systems. Features Model: U2-10 Connection: 5/8" SAE MM Robust, leak-proof design Easy...
€7.44
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Weld Coupling 1/4" SAE x 6 mm – Castel 7170/22 Weld Coupling 1/4" SAE x 6 mm – Castel 7170/22

Weld Coupling 1/4" SAE x 6 mm – Castel, Olab Compatible

The weld coupling 1/4" SAE x 6 mm is designed for strong, leak-free connections in refrigeration and HVAC systems. Compatible with Castel and Olab references, this coupling provides reliable performance and easy installation for commercial and industrial use. Features Connection: 1/4" SAE x 6 mm Strong, leak-proof design Easy welding and...
€6.16
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Elbow Coupling E2-4 1/4" SAE MM – Castel 7210/2 Elbow Coupling E2-4 1/4" SAE MM – Castel 7210/2

Elbow Coupling E2-4 1/4" SAE MM – Castel, Olab, Refco

The E2-4 elbow coupling 1/4" SAE MM is ideal for creating secure, leak-free bends in refrigeration and HVAC systems. Compatible with Castel, Olab, and Refco references, this coupling offers durable performance and easy installation for professional and industrial applications. Features Model: E2-4 Connection: 1/4" SAE MM Robust, leak-proof...
€12.28
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Elbow Coupling E2-6 3/8" SAE MM – Castel 7210/3 Elbow Coupling E2-6 3/8" SAE MM – Castel 7210/3

Elbow Coupling E2-6 3/8" SAE MM – Castel, Olab, Refco

The E2-6 elbow coupling 3/8" SAE MM is ideal for making secure, leak-free bends in refrigeration and HVAC systems. Compatible with Castel, Olab, and Refco references, this elbow coupling ensures reliable performance and easy installation for professional use. Features Model: E2-6 Connection: 3/8" SAE MM Durable, leak-proof construction Easy...
€5.16
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Elbow Coupling E1-4A SAE/NPT MM 1/4" x 1/8" – Castel 7230/21 Elbow Coupling E1-4A SAE/NPT MM 1/4" x 1/8" – Castel 7230/21

Elbow Coupling E1-4A SAE/NPT MM 1/4" x 1/8" – Castel, Olab

The E1-4A elbow coupling SAE/NPT MM 1/4" x 1/8" ensures a secure, leak-free bend in refrigeration and HVAC piping. Compatible with Castel and Olab references, this fitting provides robust performance and easy installation for professional applications. Features Model: E1-4A Connection: 1/4" SAE x 1/8" NPT MM Durable, leak-proof construction...
€3.31
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Elbow Coupling E1-4B SAE/NPT MM 1/4" x 1/4" – Castel 7220/2 Elbow Coupling E1-4B SAE/NPT MM 1/4" x 1/4" – Castel 7220/2

Elbow Coupling E1-4B SAE/NPT MM 1/4" x 1/4" – Castel, Olab

The E1-4B elbow coupling SAE/NPT MM 1/4" x 1/4" is designed for secure, leak-free connections in refrigeration and HVAC lines. Compatible with Castel and Olab references, this fitting ensures robust performance and simple installation for commercial and industrial applications. Features Model: E1-4B Connection: 1/4" SAE x 1/4" NPT MM Durable,...
€3.31
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Tee Fitting 1/4" SAE MMM T2-4 – Castel 7310/2 Tee Fitting 1/4" SAE MMM T2-4 – Castel 7310/2

Tee Fitting 1/4" SAE MMM T2-4 – Castel, Olab, Refco

The T2-4 tee fitting 1/4" SAE MMM is designed for easy branching in refrigeration and HVAC systems. This durable, leak-free fitting is compatible with Castel, Olab, and Refco references, making it a reliable solution for commercial and industrial use. Features Model: T2-4 Connection: 1/4" SAE MMM Durable, leak-proof construction Fast...
€12.38
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Castel solenoid valve 1028/2A6 1/4" 6 mm 220V Castel solenoid valve 1028/2A6 1/4" 6 mm 220V

Castel solenoid valve 1028/2A6 1/4" 6 mm 220V

The Castel solenoid valve 1028/2A6 is a high-quality valve made in Italy, featuring direct action NC operation with a 220V coil and connector. It is suitable for precise control of refrigerant in commercial refrigeration equipment. Specifications: Made in: Italy Type: direct action NC Coil voltage: 220V Connection: 1/4" - 6 mm Application: refrigeration...
€88.28
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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