Introducing the QFBV Model Flange Ball Valve, a robust full bore quarter-turn valve crafted for versatile on/off applications. This premium valve is available in both manual and automated versions, utilizing either electric or pneumatic actuation. Engineered with a two-piece design, it ensures simplified construction that allows for effortless maintenance throughout its extensive service life. Its reliability and efficiency make it the ideal choice for a wide range of industrial applications as well as utility services. The diverse selection of seat and body materials further enhances its adaptability, making it suitable for numerous industrial applications.
Rigorous Testing Protocols
- Body Strength Test: Conducted in compliance with BS EN 12266-1 standards, at an impressive 1.5 times the nominal pressure rating (PN) to ensure unmatched durability.
- Seat Tightness Test: Executed according to BS EN 12266-1 specifications at 1.1 times the nominal pressure (PN), achieving ISO 5208 Rate A for optimal sealing assurance.
- Comprehensive Pressure Testing: Adheres to rigorous BS EN ISO 5208 standards, ensuring exceptional safety and performance.
Distinctive Features
- A robust two-piece ductile iron body paired with a full bore design ensures maximum flow efficiency.
- Featuring a floating seat, spherical seat, and floating ball with an adaptive sealing mechanism. Its fireproof design makes it indispensable for fire protection piping systems.
- The valve seat employs a symmetrical design, ensuring non-directional switching, installation, sealing, and pressure control.
- The valve stem incorporates a wear-resistant bushing design for low torque operation and prolonged lifespan. A self-tightening upper seal design guarantees no leakage even under high pressure.
- Compliant with ISO5211 standards, the upper flange is meticulously engineered for superior performance.
- The ball is expertly solution treated or enhanced with hard chrome plating to ensure exceptional material stability, surface wear resistance, and improved sealing capabilities, extending the product's lifecycle.
- The handle features an innovative positioning lock design for straightforward installation and enhanced security.
| 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 |
Precision 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 comprehensive details and personalized assistance, please feel free to contact us at your convenience!
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