Introducing the QFBV model Flange Ball Valve, a masterpiece of engineering crafted for exceptional performance in on/off applications. This full bore quarter turn valve offers the flexibility of manual or automatic operation, utilizing either electric or pneumatic mechanisms. Its ingenious two-piece design ensures straightforward maintenance and longevity, making it the preferred choice for both industrial applications and utility services. With a diverse range of seats and body materials, this versatile valve adeptly meets the demands of various industrial applications.
Rigorous Testing Protocols
- Body Strength Test: Adhering to BS EN 12266-1 standards, our valve is tested at a stringent 1.5 times the nominal pressure (PN), ensuring uncompromised durability and reliability.
- Seat Tightness Test: Compliant with BS EN 12266-1 at 1.1 times PN, coupled with ISO 5208 Rate A, this test guarantees optimal seal integrity and performance.
- Pressure Testing: Conducted in accordance with BS EN ISO 5208 to ensure maximum reliability and safety.
Key Features
- Constructed with a robust two-piece ductile iron body, the valve features a full bore design for maximum flow efficiency.
- Includes a sophisticated floating seat, spherical seat, floating ball, and adaptive sealing system. Engineered with a fireproof design, it is ideally suited for fire protection piping systems.
- Symmetrically designed valve seat ensures non-directional switching, installation, sealing, and pressure capabilities.
- The valve stem is equipped with a wear-resistant bushing to deliver low torque operation and extended lifespan. The self-tightening upper seal design prevents stem leakage even under high pressure.
- Upper flange is precisely manufactured to meet ISO5211 standards, ensuring compatibility and convenience.
- The ball undergoes solution treatment or hard chrome plating, enhancing material stability, surface wear resistance, and sealing performance, thus extending product longevity.
- The handle features a positioning lock design, facilitating easy installation and secure operation.
| No. |
Part Name |
Material |
Standard |
| 1 |
Body |
Ductile Iron |
EN GJS500-7 |
| 2 |
Bonnet |
Ductile Iron |
EN GJS500-7 |
| 3 |
Ball |
Stainless Steel |
SS304 |
| 4 |
Stem |
Stainless Steel |
SS304 |
| 5 |
Packing |
Rubber |
PTFE |
| 6 |
Hand Lever |
Ductile Iron |
EN GJS500-7 |
Comprehensive Dimensions
| INCH |
DN |
L |
D |
D1 |
b |
n-φD |
| PN10 |
PN16 |
| 1-1/4'' |
32 |
130 |
140 |
100 |
19 |
4-φ19 |
| 1-1/2'' |
40 |
140 |
150 |
110 |
19 |
4-φ19 |
| 2'' |
50 |
150 |
165 |
125 |
19 |
4-φ19 |
| 2-1/2'' |
65 |
170 |
185 |
145 |
19 |
4-φ19 |
| 3'' |
80 |
180 |
200 |
160 |
19 |
8-φ19 |
| 4'' |
100 |
190 |
220 |
180 |
19 |
8-φ19 |
| 5'' |
125 |
325 |
250 |
210 |
19 |
8-φ19 |
| 6'' |
150 |
350 |
285 |
240 |
19 |
8-φ23 |
| 8'' |
200 |
400 |
340 |
295 |
22 |
8-φ23 |
12-φ23 |
| 10'' |
250 |
450 |
405 |
355 |
24 |
12-φ23 |
12-φ27 |
For additional information or inquiries, please feel free to contact us at your convenience!
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