Coliter ® Brass Gas Lockable Ball Valve, 1.6MPa, -20–60°C, BSP Threaded
QF5121A Brass Gas Lockable Ball Valve – Quarter-Turn Shut-Off with Integrated Padlock for Gas Line Security
The Coliter® QF5121A Brass Gas Lockable Ball Valve is a robust quarter-turn ball valve specifically designed for safe isolation of natural gas, manufactured gas, and liquefied petroleum gas (LPG) in residential, commercial, and utility piping systems. Made from high-quality forged brass with a full-port design, it ensures unrestricted flow and minimal pressure loss when open. The valve features an integrated lockable handle that accommodates a standard padlock or key-lock mechanism to prevent tampering or unauthorized operation—ideal for gas meter enclosures, multi-family dwellings, and public infrastructure. Rated for a nominal pressure of 1.6 MPa and operating temperatures from -20°C to 60°C, it utilizes PTFE seals for reliable, long-term leak-tight performance and complies with national gas valve safety standards. Threaded ends conform to ISO 228 (BSP parallel), available in sizes DN15 (G1/2"), DN20 (G3/4"), and DN25 (G1").
Installation diagram
Product Description
| DN | G | D | L | H | A |
| 15 | G1/2" | 14 | 55.5 | 42.5 | 65 |
| 20 | G3/4" | 19 | 64 | 45 | 65 |
| 25 | G1" | 23 | 71 | 49 | 65 |
Technical Specifications
Nominal Pressure: 1.6MPa
Working Medium: Natural Gas, Manufactured Gas, Liquefied Petroleum Gas (LPG)
Working Temperature: -20℃ ≤ t ≤ 60℃
Pipe Threads: ISO 228
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Faq - Frequent questions
Introduction to Gas Ball Valve
Coliter®’s gas ball valves are engineered for reliable, leak-tight shut-off in natural gas and LPG piping systems. The series includes standard models like QF3128 and QF3122, as well as lockable variants (QF5121A, QF5122) with integrated padlock or key-lock mechanisms to prevent unauthorized operation—ideal for utility, residential, and commercial gas lines. All valves feature high-quality forged brass bodies, PTFE seals for long-term tightness, full-port design for unrestricted flow, and compliance with national gas valve standards. Rated for working pressures of 0.1–0.5 MPa and temperatures from -20°C to +60°C, they ensure safe, durable performance with quarter-turn operation and clear open/close indicators.
