Introducing the Flange Ball Valve, your ultimate solution for seamless flow control.
Discover the QFBV Series: Engineered for excellence and precision.
The WALTER QFBV model Flange Ball Valve is a robust, full bore quarter-turn valve designed for reliable on/off applications. Available in both manual and automatic configurations (electric or pneumatic), this versatile valve features a two-piece design, offering simple construction for easy maintenance and a long working life. It is the ideal choice for industrial applications and utility services. The model's versatility is further enhanced by a wide variety of seats and body materials, catering to multiple industry needs. The diverse selection of body and seat materials ensures adaptability across numerous industrial applications.
Application Range
• Designed for efficient operation in Pump Stations
• Essential for Water Supply Systems
• Integral to Water Treatment and Distribution Systems
• Suitable for use in Tanks
• Optimized for Power Station Cooling Lines
Testing
▪ Body Strength Test: Adheres to BS EN 12266-1, tested at 1.5 x PN to ensure durability.
▪ Seat Tightness Test: Complies with BS EN 12266-1, tested at 1.1 x PN for maximum security.
ISO 5208 Rate A certified for precise performance.
▪ Pressure Testing: Conducted in accordance with BS EN ISO 5208, confirming superior pressure resistance.
Technical Data
| Size range |
DN32-DN250 |
| Pressure range |
PN10-16-25 |
| Temperature |
EPDM -10ºC to +80ºC / NBR -10ºC to +60ºC |
| Design |
DIN 3357 |
| Face to face |
DIN 3202 F4/F5 |
| Flange drilling |
EN 1092-2 / ISO 7005-2 |
| Coating |
Thermoplastic Powder Epoxy |
| Testing |
EN 12266-1 |
| Marking |
EN 19 |
| Coating Blue Color |
RAL 5005 |
| RAL 5010 |
| RAL 5015 |
| Custom made |
Features
• Built with a two-piece ductile iron body; its full bore design ensures unrestricted flow.
• Incorporates floating seat, spherical seat, floating ball, and adaptive sealing. Designed to be fireproof, making it ideal for fire protection applications. Withstands the highest standards for fire protection pipeline integrity.
• The valve seat's symmetrical design provides effortless switching, installation, sealing, and pressure management without directionality concerns.
• Engineered with a wear-resistant bushing valve stem, this design guarantees low torque and extended longevity. The self-tightening upper seal ensures no leakage under high pressure. The self-tightening upper seal prevents valve stem leakage even at elevated pressures.
• The upper flange is compliant with the ISO5211 standard for seamless integration.
• Ball is either solution treated or hard chrome plated, delivering reliable material stability and surface wear resistance, thus enhancing sealing performance and extending product lifespan. Ensures exceptional sealing performance and prolonged product lifespan.
• Features a handle with a positioning lock design for user-friendly installation.
Material Specification
| No. |
Part Name |
Material |
Standard |
| 1 |
Body |
Ductile Iron |
EN GJS 500-7 |
| 2 |
Bonnet |
Ductile Iron |
EN GJS 500-7 |
| 3. |
Ball |
Stainless Steel |
SS 304 |
| 4 |
Stem |
Stainless Steel |
SS 304 |
| 5 |
Packing |
Rubber |
PTFE |
| 6 |
Hand lever |
Ductile Iron |
EN GJS 500-7 |
Dimensionally crafted to PN10/16(mm) standards for precise fit and function.
| INCH |
DN |
L |
D |
D1 |
b |
n-φd |
| PN10 |
PN16 |
| 1-1/4" |
32 |
130 |
140 |
100 |
19 |
4-φ19 |
| 1.5" |
40 |
140 |
150 |
110 |
19 |
4-φ19 |
| 2" |
50 |
150 |
165 |
125 |
19 |
4-φ19 |
| 2.5" |
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 |
ABOUT US
Suzhou Walter Flow Control Equipment Co., Ltd. We are proud to be a professional manufacturer specializing in water system valves. Our product line includes OEM capabilities for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and other internationally standardized valves. Select products are available with FM/UL certifications. At Walter, we prioritize consumer experience by offering expert advice and fluid control solutions, alongside accommodating custom designs and special requirements.
We eagerly anticipate your consultation!
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