Danfoss RLV-KS Straight Radiator Shut-off Valve 1/2 inch Nickel-Plated Brass 003L7643

A radiator valve that combines a straight shut-off pattern with a nickel-plated brass body, the Danfoss 003L7643 stands out for its dual connection design: an R 1/2 male thread on the inlet and a G 1/2 union nut on the outlet. This configuration simplifies installation and maintenance in hydronic heating systems, allowing the radiator to be isolated without draining the entire circuit. Built for daily use, it handles water and water/glycol mixtures up to 30% at pressures up to 10 bar and temperatures up to 120 °C.

Highlights

• Straight shut-off valve for radiator isolation in heating systems
• Nickel-plated brass body for corrosion resistance and durability
• Inlet: R 1/2 male thread (ISO 7-1); Outlet: G 1/2 union nut (ISO 228-1)
• Manual operation with protective cap
• Kv value 2.5 m³/h for efficient flow control
• Max. operating pressure 10 bar; max. temperature 120 °C
• Suitable for water and water/glycol mixtures up to 30%
• Series RLV-KS, product type radiator valve

In daily use

Installed on the supply or return of a radiator, this valve allows quick shut-off for maintenance, bleeding, or replacement of the radiator without affecting the rest of the system. The union nut connection makes it easy to disconnect the radiator with a simple wrench, while the male threaded inlet screws directly into standard radiator tappings. The protective cap prevents accidental operation and keeps the spindle clean. The nickel-plated finish not only looks professional but also resists tarnishing and corrosion in typical heating environments.

Full specifications

• Valve type: Shut-off valve
• Pattern: Straight
• Connection size: 1/2 inch
• Inlet connection: R 1/2 (male thread)
• Outlet connection: G 1/2 (union nut, female thread)
• Material: Nickel-plated brass
• Max. operating pressure: 10 bar (1 MPa)
• Max. operating temperature: 120 °C
• Kv value: 2.5 m³/h
• Media: Water, water/glycol mixtures (up to 30%)
• Application: Radiator shut-off in heating systems
• Actuation: Manual (with protective cap)
• Thread standard: ISO 228-1 (G) / ISO 7-1 (R)
• Series: RLV-KS
• Product type: Radiator valve

Final note

For heating professionals and DIY enthusiasts alike, the Danfoss 003L7643 offers a dependable, easy-to-install solution for radiator isolation, backed by Danfoss quality and precise engineering.