The QF2C gas valves are high-pressure cylinder valves designed for safe control of oxygen, nitrogen, argon, and compressed air cylinders. Manufactured from high-strength forged brass, the valve provides excellent sealing performance, durability, and safe gas flow regulation for industrial gas applications.
QF2C cylinder valves are widely used in gas storage, welding, medical oxygen supply, laboratory gas systems, and industrial gas distribution.
Key Features
- High pressure design up to 15MPa
- Forged brass body for durability
- Reliable sealing structure
- Smooth opening and closing
- Oxygen service cleaned
- 100% leak tested
- Long service life
Technical Specifications
| Model | QF-2C |
| Working Pressure | 15 MPa |
| Nominal Diameter | 4 mm |
| Inlet Thread | PZ27.8 |
| Outlet Thread | G5/8 |
| Safety Device | 21 ±1.5 MPa |
| Suitable Gas | Oxygen, Nitrogen, Argon, Air |
| Material | Forged Brass |
| Operation Type | Manual |
Specification
| TYPE | MEDIUM AVAILABLE | WP (MPa) | INLET THREAD | OUTLET THREAD | SAFETY DEVICE (Mpa) | DN (mm) | STRUCTURAL STYLE |
| QF-2 | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Valve type |
| QF-2B | O2,N2 | 15 | GB8335 PZ27.8 | G5/8-LH | 21±1.5 | 4 | Valve type |
| QF-2B1 | O2,N2 | 15 | G1/2 | W22×1/14 | 21±1.5 | 4 | Valve type |
| QF-2C | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Valve type |
| QF-2D | O2,N2 | 15 | GB8335 PZ27.8 | Internal thread G5/8 | 21±1.5 | 4 | Valve type |
| QF-2E | O2,N2 | 15 | JIS B 8246 V1 φ20 | W22×1/14 | 4 | Valve type | |
| QF-2F | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Valve type |
| QF-2G | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Shaft type |
| QF-2M | O2,N2 | 15 | GB8335 PZ27.8 | G1/2 | 21±1.5 | 4 | Valve type |
| QF-2P | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Valve type |
| QF-4 | O2,N2 | 15 | GB8335 PZ27.8 | G3/4 | 21±1.5 | 4 | Valve type |
| QF-5 | O2,N2 | 20 | GB8335 PZ27.8 | G5/8 | 28±2 | 4 | Valve type |
| QF-6 | O2,N2 | 15 | GB8335 PZ27.8 | Internal thread G5/8 | 4 | Valve type | |
| QF-7 | O2,N2 | 15 | GB8335 PZ27.8 | Internal thread G5/8 | 4 | Needle form | |
| QF-8 | O2,N2 | 15 | GB8335 PZ27.8 | G1/2 | 4 | Shaft type | |
| QF-12 | O2,N2 | 15 | GB8335 PZ19.2 | G5/8 | 21±1.5 | 4 | Valve type |
| QF-20 | O2,N2 | 15 | GB8335 PZ19.2 | G1/2 | 21±1.5 | 2 | Diaphragm type |
| QF-21 | O2,N2 | 15 | GB8335 PZ19.2 | W21.8×1/14 | 21±1.5 | 2 | Diaphragm type |
| QF-22 | O2,N2 | 15 | GB8335 PZ27.8 | W21.8×1/14 | 21±1.5 | 4 | Valve type |
| QF-25 | O2 | 15 | GB8335 PZ19.2 | φ7 Hose | 2 | Needle form | |
| QF-27 | O2,N2 | 15 | JIS B 8246 V1 | W22×1/14 | 21±1.5 | 3 | Valve type |
| F-1 | O2,N2 | 15 | GB8335 PZ27.8 | Internal thread W23×1/14 | 21±1.5 | 4 | Valve type |
| F-2 | O2,N2 | 15 | JIS B 8246 V2 | Internal thread W23×1/14 | 21±1.5 | 4 | Valve type |
| F-3 | O2,N2 | 15 | BS341 1×1/14 | Internal thread G5/8 | 21±1.5 | 4 | Shaft type |
| DF-4 | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Shaft type |
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Cleaned for oxygen service and oil-free as per CGA G-4.1 & ASTM G-93
100% helium tested
Reduced friction due to optimized O-ring (GV) or double O-ring (GVHM) seal and smooth operation at deficient torque levels
Compact design and cosmetic appeal
Unique construction to reduce magnetic attraction
Valves are critical in the medical industry as medical equipment demands quality assurance of its components.
Advantages
Reliable Sealing
The valve adopts a precision sealing structure to ensure leak-free performance and stable gas pressure control.
Strong Construction
Manufactured from forged brass, the valve offers high mechanical strength, corrosion resistance, and long operating life.
Safety Design
Each valve is pressure tested and leak tested to ensure safe operation in high pressure environments.
Quality Control
All QF2C gas valves are tested before delivery:
- Air tightness testing
- Pressure testing
- Thread inspection
- Appearance inspection
- Function testing
Applications
QF2C cylinder valves are suitable for various gas cylinder applications:
- Industrial gas cylinders
- Oxygen cylinders
- Nitrogen cylinders
- Argon cylinders
- Welding gas systems
- Medical oxygen systems
- Gas filling stations
- Laboratory gas supply
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