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Q21F Female & Male Thread Ball Valve Overview
The Q21F Female & Male Thread Ball Valve is a compact ball valve featuring a combined female and male thread connection design. The valve body is typically constructed from brass or stainless steel. With external threads on one end (e.g., G-thread) and internal threads on the other, it can directly connect pipelines or equipment with different interface standards, eliminating the need for additional fittings. The valve operates via a 90-degree rotation of the stem to quickly open or close the ball. A PTFE (or similar soft seal) seat ensures reliable sealing. Combining both adaptation and shut-off functions in one compact unit, this valve offers a small footprint and flexible installation. It is suitable for non-corrosive media such as water, oil, and air, and is widely used in HVAC systems, instrumentation, small-scale equipment, and residential plumbing.

Q21F Female & Male Thread Ball Valve Product Image
Q21F Female & Male Thread Ball Valve Features
1. Combined Female & Male Thread Design: Features a unique construction with external threads on one end and internal threads on the other, enabling direct adaptation between pipelines with different interfaces. This simplifies installation while saving space and cost.
2. Compact and Multi-Functional Structure: Integrates both connection adaptation and shut-off functions in a single, short-face-to-face unit. Ideal for space-constrained installations or applications requiring pipeline interface conversion.
3. Excellent Sealing Performance: The PTFE seat creates a reliable soft seal with the ball, ensuring effective sealing. Low operating torque allows for smooth and effortless opening and closing.
4. Easy Installation and Cost-Effectiveness: Eliminates the need for additional adapters, enabling quick and simple installation. Brass or stainless steel construction provides corrosion resistance, long service life, and low maintenance costs.
5. Wide Range of Applications: Suitable for media such as water, oil, and air within standard temperature and pressure ranges. Serves as a cost-efficient connection and control component for residential, commercial, and general industrial piping systems.

Q21F Female & Male Thread Ball Valve Structure Diagram
Parts Name Material List
| 序 号NO. | 名称Name | 材料Material |
| 1 | 阀体body | 不锈钢Stainless Steel |
| 2 | 球体ball | 不锈钢Stainless Steel |
| 3 | 密封圈seal gasket | PTFE |
| 4 | 填料packing | 弹性石墨Flexible Graphite |
| 5 | 阀杆stem | 不锈钢Stainless Steel |
| 6 | 阀座seat | RPTFE |
| 性能规范表Performance Specification | ||
| 公称压力Nominal Pressure | 1.6 | Mpa |
| 强度试验压力Shell Test | 2.4 | |
| 密封试验压力Seal Test | 1.8 | |
| 适用温度Suitable Temp. | 120 | ℃ |
Dimensions Standard Requirements
1. The structural length of the valve shall conform to the standard GB/T12221.
2. The connecting flange shall conform to the standard GB9113.

Q21F Female & Male Thread Ball Valve View Drawing
Q21F Female & Male Thread Ball Valve Dimensions Table
| ON | SIZE | L | H | 0 | S |
| 09 | 1/8" | 47 | 31 | 85 | 5 |
| 10 | 2/8" | 55 | 41 | 81 | 10 |
| 15 | 1/2" | 61 | 42 | 81 | 12 |
| 20 | 3/8” | 55.5 | 47 | 93 | 15 |

Model:
Q61F-16PSpecification:
DN15-DN100Pressure:
PN16Material:
stainless steel
Model:
Q641F-16C/Q641F-25C/Q641F-40C/Q641F-16P/Q641F-25P/Q641F-40P/Specification:
DN20-DN200Pressure:
PN16,PN25,PN40Material:
Carbon steel,stainless steel,Bronze
Model:
DQ41FSpecification:
DN15-DN700Pressure:
PN16-250Material:
stainless steel,Low Temperature Steel,Duplex stainless steel