Flange Ball Valve
Introducing the QFBV Series - Your Gateway to Excellence
The WALTER QFBV model Flange Ball Valve embodies the zenith of engineering expertise, featuring a full bore quarter-turn mechanism that is perfect for flawless on/off operations. This multifunctional valve supports both manual and automatic modes, whether electric or pneumatic, providing flexibility in various settings. Its innovative 2-piece design simplifies maintenance, ensuring enduring reliability and a long-lasting service life. This versatile valve is the preferred choice for numerous industrial applications and utility services due to its robust performance. Moreover, the wide selection of seating options and diverse body materials enhances its ability to serve an extensive spectrum of industrial applications.
Application Range
• Perfectly suited for Pump Stations
• Ideal for Water Supply Systems
• Essential in Water Treatment and Distribution Systems
• Suitable for Tanks
• Highly efficient in Power Station Cooling Lines
Testing
▪ Rigorous Body Strength Test: BS EN 12266-1: 1.5 x PN ensures durability and reliability.
▪ Precision Seat Tightness Test: BS EN 12266-1: 1.1 x PN guarantees leak-proof performance.
Compliant with ISO 5208 Rate A for superior quality assurance.
▪ Comprehensive Pressure Testing: in accordance with BS EN ISO 5208 for optimal safety.
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
• Constructed with a robust two-piece ductile iron body; features a full bore design to maximize flow efficiency.
• Integrates a floating seat, spherical seat, floating ball, and adaptive sealing technology. Also includes a fireproof design tailored for fire protection pipelines, ensuring unmatched safety and reliability.
• Symmetrically designed valve seat for hassle-free non-directional switching, installation, sealing, and pressure applications.
• Valve stem includes a wear-resistant bushing, ensuring smooth low torque operation and increased longevity. The revolutionary self-tightening upper seal design guarantees zero leakage from the valve stem even under high-pressure scenarios.
• Upper flange adheres strictly to ISO5211 standards, ensuring universal compatibility for seamless integration.
• Ball receives solution treatment or hard chrome plating for superior material stability and surface wear resistance, significantly enhancing sealing capabilities and extending the product's lifecycle to new heights.
• Handle is designed with a positioning lock for straightforward installation and heightened security.
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 |
Dimension PN10/16(mm)
| 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. As a committed and expert manufacturer specializing in water system valves, Suzhou Walter Flow Control Equipment Co., Ltd. delivers superior OEM solutions for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and a variety of international standard valves. Our products proudly include those with the esteemed FM/UL Certification. At Walter, customer satisfaction is our priority, offering professional guidance and personalized fluid control solutions. Furthermore, we welcome custom designs and special requirements, striving to surpass expectations.
We warmly invite your inquiries and look forward to meeting your needs!
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