The Caleffi 301140 is an angled isolation valve for two-pipe panel radiators, 1/2 in radiator connection x 3/4 in conical pipe connection. It shuts off the radiator for service or removal without draining the circuit.
Best for isolating a panel radiator on a two-pipe system for service or replacement.
Specifications sourced from Caleffi North America technical literature. Last reviewed July 2026.
Key Features
Manual Isolation for Two-Pipe Radiators
Shuts off the radiator for service or removal without draining the circuit. It is a manual isolation valve, not a thermostatic control valve.
Technical Specifications
| Product Type | Radiator Isolation Valve |
| Connections | 1/2 in radiator connection x 3/4 in conical pipe connection |
| Body Style | Angled |
| System Type | Two-Pipe |
| Maximum operating pressure | 150 psi (10 bar) |
| Medium temperature range | 40 to 212 deg F (5 to 100 deg C) |
| Series | Angled Version |
| Shipping Weight | 0.5 lb (approx.) |
Documentation
Related Products
- Caleffi 301241 : Straight Diverter Valve, One-Pipe
- Caleffi 301341 : Angled Diverter Valve, One-Pipe
- Caleffi 437516 : Compression Fitting 1/2 in Copper
- Caleffi 449740 : Wall-Covering Plate 40-50 mm
Frequently Asked Questions
What does Caleffi 301140 do?
It is a manual isolation valve for two-pipe panel radiators. It shuts off the radiator so it can be serviced or removed without draining the circuit. It does not provide thermostatic control.
What are the pressure and temperature limits of Caleffi 301140?
Maximum operating pressure is 150 psi (10 bar), over a medium temperature range of 40 to 212 deg F (5 to 100 deg C).
What is the warranty on Caleffi 301140?
Caleffi covers this product under its standard two-year limited warranty against defects in material and workmanship from the date of shipment. ZOT Supply is an authorized Caleffi distributor.
- Product Type:
- Radiator Isolation Valve
- Product Family:
- Connection Valves
- Series:
- Angled Version
- Connections:
- 1/2 in radiator connection x 3/4 in conical pipe connection
- Body Style:
- Angled
- System Type:
- Two-Pipe
- Max Operating Pressure:
- 150 psi (10 bar)
- Medium Temperature Range:
- 40 to 212 deg F (5 to 100 deg C)
