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Q11F Square Three-Piece Ball Valve Overview
The Q11F Square Three-Piece Ball Valve is a ball valve featuring a three-piece split-body design with a square-shaped valve body and internal thread connections. The valve body and connecting components are typically made of brass or stainless steel, consisting of two end caps and a central valve body bolted together to form a stable structure that facilitates easy disassembly and maintenance.The valve operates by rotating the stem to drive the ball 90 degrees for opening or closing, while the seat seal is made of soft materials such as PTFE (polytetrafluoroethylene) to ensure reliable sealing. Known for its distinctive square appearance, compact split-body design, and high cost-effectiveness, this valve is suitable for non-corrosive media such as water, oil, and gas, with a typical working pressure range of PN16 to PN40. It is widely used in instrumentation, small equipment, water/gas supply systems, pneumatic systems, and general industrial pipelines.

Q11F Square Three-Piece Ball Valve Product Image
Q11F Square Three-Piece Ball Valve Features
1. Square Three-Piece Split Structure: The distinctive square valve body is composed of three bolted-together sections, offering a sturdy construction and convenient disassembly, facilitating internal cleaning and component maintenance.
2. Compact and Reliable Threaded Connection: Equipped with internal threads (G or NPT), the valve features a short, space-saving design that requires minimal installation space while ensuring reliable sealing, making it suitable for small and compact pipeline layouts.
3. Excellent Sealing and Low Operating Torque: The PTFE seat forms a soft seal with the ball, providing superior sealing performance and a low friction coefficient, which enables smooth and effortless opening and closing operation.
4. Durability and Ease of Maintenance: Made from corrosion-resistant and high-strength brass or stainless steel, the valve ensures long service life. In case of seal failure, it can be quickly restored by replacing the seat or using a complete repair kit, resulting in low maintenance costs.
5. Cost-Effectiveness and Neat Appearance: With reasonable manufacturing costs, the valve delivers high value for money. Its square shape allows for orderly arrangement and secure mounting on equipment or pipelines, offering both aesthetic appeal and practicality.


Q11F Square Three-Piece 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 | O型圈 O ring | 氟橡胶氟橡胶FKM 、Viton |
| 4 | 填料packing | 弹性石墨flexible graphite |
| 5 | 阀杆stem | 不锈钢stainless steel |
| 性能规范表Performance Specification | ||
| 公称压力Nominal Pressure | 1.6/2.5/4 | Mpa |
| 强度试验压力Shell Test | 2.4/3.75/6 | |
| 密封试验压力Seal Test | 1.76/2.75/4.4 | |
| 适用温度Suitable Temp. | 450 | ℃ |
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 JB/T7306.


Q11F Square Three-Piece Ball Valve View Drawing
Q11F Square Three-Piece Ball Valve Dimensions Table
| 磅级 Class | 缩径 RB | 通径 FB | L | L1 | d | NPT | SW | H | W | ||
| RB | FB | RB | FB | ||||||||
| Q11F 800LB 900LB 1500LB | 3/8"×1/4" | 1/4" | 92 | 9.6 | 9.5 | 3/8" | 1/4" | 17.6 | 14.2 | 53 | 130 |
| 1/2"×3/8" | 3/8" | 92 | 9.6 | 9.5 | 1/2" | 3/8" | 21.8 | 17.6 | 53 | 130 | |
| 3/4"×1/2" | 1/2" | 92 | 12.7 | 14 | 3/4" | 1/2" | 27.1 | 21.8 | 56 | 130 | |
| 1"×3/4" | 3/4” | 111 | 12.7 | 19 | 1" | 3/4" | 33.8 | 27.1 | 70 | 160 | |
| 1-1/4"×1" | 1" | 127 | 12.7 | 25 | 1-1/4” | 1" | 42.6 | 33.8 | 80 | 220 | |
| 1-1/2"×1-1/4" | 1-1/4" | 140 | 12.7 | 30 | 1-1/2" | 1-1/4" | 48.7 | 42.6 | 90 | 250 | |
| 2"×1-1/2" | 1-1/2" | 152 | 15.9 | 38 | 2" | 1-1/2" | 61.2 | 48.7 | 100 | 250 | |
| 2-1/2"×2" | 2" | 178 | 15.9 | 48 | 2-1/2" | 2" | 74.1 | 61.2 | 110 | 300 | |
| Q11F 2500LB | 3/8"×1/4" | 1/4" | 111 | 9.6 | 9.5 | 3/8" | 1/4" | 17.6 | 14.2 | 53 | 160 |
| 1/2"×3/8" | 3/8" | 111 | 9.6 | 9.5 | 1/2" | 3/8" | 21.8 | 17.6 | 53 | 160 | |
| 3/4"×1/2" | 1/2" | 111 | 12.7 | 14 | 3/4" | 1/2" | 27.1 | 21.8 | 56 | 160 | |
| 1"×3/4" | 3/4" | 127 | 12.7 | 19 | 1" | 3/4" | 33.8 | 27.1 | 70 | 220 | |
| 1-1/4"×1" | 1" | 140 | 12.7 | 25 | 1-1/4" | 1" | 42.6 | 33.8 | 80 | 250 | |
| 1-1/2"×1-1/4" | 1-1/4" | 152 | 12.7 | 30 | 1-1/2" | 1-1/4" | 48.7 | 42.6 | 90 | 250 | |
| 2"×1-1/2" | 1-1/2" | 178 | 15.9 | 38 | 2" | 1-1/2" | 61.2 | 48.7 | 100 | 300 | |
| 2-1/2"×2" | 2" | 203 | 15.9 | 48 | 2-1/2" | 2" | 74.1 | 61.2 | 110 | 320 | |

Model:
Q21Y -16C/Q21Y -25C/Q21Y -40C/Q21Y -64C/Q21Y -16P/Q21Y -25P/Q21Y -40P/Q21Y -64PSpecification:
DN10-DN25Pressure:
PN16,PN25,PN40,PN64Material:
stainless steel,carbon steel,forged stainless steel
Model:
VQ947F-16C/VQ947F-25C/VQ947F-40C/VQ947F-16P/VQ947F-25P/VQ947F-40P/VQ947F-16R/VQ947F-25R/VQ947F-40RSpecification:
DN25-DN400Pressure:
PN16、PN25、PN40Material:
Cast Steel,Stainless Steel,Duplex Stainless Steel
Model:
Q941F-16P/Q941F-40P/Q941F-64P/Q941F-25P/Q941F-16R/Q941F-25R/Q941F-40R/Q941F-64RSpecification:
DN15-DN300Pressure:
PN16,PN25,PN40,PN64Material:
Carbon steel, stainless steel,alloy steel,Bronze