Flange Ball Valve
Introducing the QFBV Series - Your Gateway to Excellence
The WALTER QFBV model Flange Ball Valve stands as a true pinnacle of engineering prowess, designed with a full bore quarter-turn mechanism that is perfect for seamless on/off applications. This exceptional valve offers both manual and automatic operation options, including electric or pneumatic control. Its ingenious 2-piece design ensures straightforward maintenance, delivering a long-lasting service life. This makes it the ideal choice for a vast array of industrial applications and utility services. Additionally, the diverse array of seating options and body materials grants it the flexibility to cater to an extensive range of industrial applications.
Application Range
• Perfect for Pump Stations
• Ideal for Water Supply Systems
• Essential in Water Treatment and Distribution Systems
• Suitable for Tanks
• Efficient in Power Station Cooling Lines
Testing
▪ Rigorous Body Strength Test: BS EN 12266-1: 1.5 x PN
▪ Precision Seat Tightness Test: BS EN 12266-1: 1.1 x PN
Compliant with ISO 5208 Rate A
▪ Comprehensive Pressure Testing: BS EN ISO 5208
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
• Expertly crafted with a durable two-piece ductile iron body; features a full bore design that enhances flow.
• Incorporates floating seat, spherical seat, floating ball, and adaptive sealing technology. Additionally features a fireproof design suitable for fire protection pipelines, ensuring safety and reliability.
• Symmetrically designed valve seat for non-directional switching, installation, sealing, and pressure.
• The valve stem is strategically equipped with a wear-resistant bushing, guaranteeing low torque operation and extended lifespan. The innovative self-tightening upper seal design ensures zero leakage from the valve stem even under high pressure conditions.
• Upper flange is fully compliant with the ISO5211 standard, ensuring universal compatibility.
• The ball undergoes solution treatment or hard chrome plating to ensure exceptional material stability and surface wear resistance, thereby enhancing sealing performance and extending the product's lifecycle.
• The handle features a positioning lock design for effortless installation and enhanced 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 leading and dedicated manufacturer specializing in water system valves, Suzhou Walter Flow Control Equipment Co., Ltd. provides top-tier OEM options for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and an array of international standard valves. Some of our products proudly bear the prestigious FM/UL Certification. At Walter, we prioritize consumer experience by offering expert advice and tailored fluid control solutions. Additionally, we readily embrace custom designs and special requirements to exceed expectations.
We warmly invite your consultation and eagerly look forward to serving your needs!
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