Flange Ball Valve - A Marvel of Precision Engineering
Introducing the QFBV Series - Your Gateway to Excellence and Unmatched Performance
The illustrious WALTER QFBV model Flange Ball Valve represents the zenith of engineering expertise. With its full bore quarter-turn mechanism, it is meticulously crafted for flawless on/off applications, suitable for any situation. Whether your requirements lean towards manual operation or the precision of automatic electric or pneumatic control, this valve delivers. Its intelligent 2-piece design allows for effortless maintenance and promises an extensive service life, making it indispensable for a broad spectrum of industrial applications and utility services. Moreover, the variety of seating options and diverse body materials enable it to meet the demands of a wide range of industrial applications effectively.
Application Range - Unleashing Boundless Possibilities
• Perfectly engineered for Pump Stations
• Ideal choice for Water Supply Systems
• Essential component in Water Treatment and Distribution Systems
• Perfectly suitable for Tanks
• Exceptionally efficient in Power Station Cooling Lines
Testing - Ensuring Unrivaled Quality
▪ Rigorous Body Strength Test: Adhering to BS EN 12266-1: 1.5 x PN ensures durability
▪ Precision Seat Tightness Test: Conducted as per BS EN 12266-1: 1.1 x PN for optimal performance
Complies with ISO 5208 Rate A - A mark of excellence
▪ Comprehensive Pressure Testing: BS EN ISO 5208 for complete assurance
Technical Data - A Testament to Advanced Craftsmanship
| 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 - Where Innovation Meets Functionality
• Built with a robust two-piece ductile iron body, featuring a full bore design to enhance fluid flow efficiency.
• Incorporates advanced technologies such as floating seat, spherical seat, floating ball, and adaptive sealing. Also features a fireproof design suitable for fire protection pipelines, ensuring unparalleled safety and reliability.
• Symmetrical valve seat design allows for non-directional switching, installation, sealing, and pressure.
• Equipped with a wear-resistant bushing on the valve stem, ensuring low torque operation and enhanced longevity. The innovative self-tightening upper seal design guarantees zero leakage from the valve stem, even under high pressure, assuring reliability.
• Upper flange adheres to the ISO5211 standard, ensuring universal compatibility and ease of integration.
• The ball undergoes solution treatment or hard chrome plating, ensuring exceptional material stability and surface wear resistance, thereby enhancing sealing performance and significantly extending the product's lifecycle.
• The handle includes a positioning lock design for effortless installation and heightened security.
Material Specification - Exemplifying Superior Quality
| 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) - Precision in Every Detail
| 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 - Your Trusted Partner in Flow Control
Suzhou Walter Flow Control Equipment Co., Ltd. As a dedicated and professional manufacturer in water system valves, Suzhou Walter Flow Control Equipment Co., Ltd. excels in providing top-tier OEM solutions for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and various international standard valves. With several products proudly holding the prestigious FM/UL Certification, we at Walter prioritize consumer experience by delivering expert advice and bespoke fluid control solutions. Furthermore, we eagerly embrace custom designs and special requirements to surpass your expectations.
We warmly invite your consultation and look forward to serving your needs with unparalleled dedication!
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