Coliter ® Anti-Theft Ball Valve – PN16, -20°C to 180°C, Tamper-Proof Design for Utility Meter Protection
QA Anti-Theft Ball Valve – Fully Enclosed Handle with Dedicated Tool Operation to Prevent Unauthorized Bypass in Water & Gas Systems
The Coliter® QA Anti-Theft Ball Valve is a specialized shut-off valve engineered to prevent illegal tampering, unauthorized access, or meter bypass in residential and commercial water and gas distribution networks. Featuring a fully enclosed protective cap or sealed handle housing, the valve can only be operated using a proprietary tool issued to authorized utility personnel—effectively deterring theft, fraud, and unsafe interventions. Constructed from high-quality forged brass (HPb59-1) with a robust stainless steel (304/316) stem and PTFE seats/seals, it delivers bubble-tight shut-off, corrosion resistance, and long-term reliability. Rated at PN16 (1.6 MPa) for water service and suitable for working pressures of 0.1–0.5 MPa in gas applications, it operates across a wide temperature range of -20°C to +180°C. Compatible with standard media including water, gas, oil, nitric acid, and acetic acid, the QA valve complies with GB/T 12224 (design), ISO 228 (threading), and GB/T 13927 (testing). Available in sizes from DN6 (1/4") to DN100 (4") with female/male BSP/NPT threads, it is commonly installed upstream or downstream of smart meters in apartment buildings, public utilities, and industrial metering stations. Its compact quarter-turn design ensures quick emergency shut-off while maintaining regulatory compliance and revenue protection for utility operators.
Installation diagram
Product Description
| Serial Number | Name Specification | material |
| 1 | Valve body | WCB/CF8/CF8M |
| 2 | Valve seat | PTFE |
| 3 | Sphere | CF8/CF8/CF8M |
| 4 | Shim | PTFE |
| 5 | Bonnet | WCB/CF8/CF8M |
| 6 | Valve stem | 304/304/316 |
| 7 | Stem washer | PTFE |
| Performance specifications | |||||
| Nominal Pressure | 1.6MPa | ||||
| test pressure | Strength | 2.4 | MPa | test medium | Water |
| Seal | 1.76 | Water | |||
| Upper seal | 1.76 | Water | |||
| Hermetic seal | 0.6 | Air | |||
| Applicable Temperature | -20℃~180℃ | ||||
| Applicable Medium | Water, gas, oil, nitric acid, acetic acid, etc. | ||||
Technical requirement
- The design and manufacturing of valves shall comply with the provisions of GB/T12224;
- The structural length of the valve shall comply with the manufacturer's requirements;
- The connection size of the valve shall comply with the provisions of ISO228 cylindrical pipe threads;
- The inspection and testing of valves shall comply with the provisions of GB/T13927.
Main shape size and connection size
| SIZE | d | L | |
| 1/4" | DN6 | 10 | 55 |
| 3/8" | DN10 | 12 | 55 |
| 1/2" | DN15 | 15 | 62 |
| 3/4" | DN20 | 20 | 71 |
| 1" | DN25 | 25 | 81.5 |
| 1 1/4" | DN32 | 32 | 96 |
| 1 1/2" | DN40 | 38 | 105 |
| 2" | DN50 | 50 | 120 |
| 2 1/2" | DN65 | 65 | 162 |
| 3" | DN80 | 80 | 170.5 |
| 4" | DN100 | 100 | 225 |
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Faq - Frequent questions
Introduction to Anti thefe ball valve
Coliter®’s anti-theft ball valves are specialized shut-off valves designed to prevent unauthorized access, tampering, or bypass of utility meters in gas and water distribution systems. Featuring a fully enclosed handle or protective cap that requires a dedicated tool for operation, these valves ensure regulatory compliance and revenue protection for utilities. Constructed from high-quality forged brass with PTFE seals, they offer bubble-tight shut-off, quarter-turn operation, and durability under working pressures of 0.1–0.5 MPa (for gas) or PN16 (1.6 MPa) (for water), with operating temperatures from -20°C to +80°C. Commonly installed upstream/downstream of smart meters in residential and commercial buildings, the anti-theft design deters illegal connections while allowing authorized personnel quick access during emergencies or maintenance.
