Flange Ball Valve
Introducing the QFBV Series - Your Gateway to Excellence
The WALTER QFBV model Flange Ball Valve is a masterpiece of engineering brilliance, showcasing an unrestricted full bore quarter-turn mechanism, designed to deliver impeccable performance in on/off applications. Its multifaceted functionality includes both manual control and automated options-perfectly adaptable with either electric or pneumatic actuators. Boasting a sophisticated 2-piece design, this valve offers ease of maintenance, ensuring a longevity that surpasses expectations. It's the prime choice for an expansive spectrum of industrial applications and utility services. Additionally, the richly diverse selection of seating options and body materials allows it to adeptly serve a broad variety of industry needs.
Application Range
• Tailor-made for Pump Stations
• Exceptionally ideal for Water Supply Systems
• Indispensable in Water Treatment and Distribution Systems
• Precisely suitable for Tanks
• Highly efficient in Power Station Cooling Lines
Testing
▪ Thorough Body Strength Test: BS EN 12266-1: 1.5 x PN
▪ Meticulous Seat Tightness Test: BS EN 12266-1: 1.1 x PN
Meeting the stringent standards of ISO 5208 Rate A
▪ All-encompassing 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
• Constructed with a robust two-piece ductile iron body; features a full bore design for superior flow optimization.
• Integrates advanced floating seat, spherical seat, floating ball, and adaptive sealing technology. Also equipped with a fireproof design tailored for fire protection pipelines, enhancing safety and trust.
• Ingeniously symmetrical valve seat design for versatile non-directional switching, seamless installation, optimal sealing, and pressure management.
• The valve stem is fortified with a wear-resistant bushing, ensuring effortless low torque operation and an extended operational life. The pioneering self-tightening upper seal design guarantees complete zero leakage from the valve stem even amidst high pressure environments.
• The upper flange meets the ISO5211 standard, ensuring seamless universal compatibility.
• The ball is subjected to state-of-the-art solution treatment or hard chrome plating for unparalleled material durability and surface wear resistance, significantly reinforcing sealing efficiency and extending the product's operational life.
• The handle incorporates a smart positioning lock design for effortless installation and reinforced 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 seasoned manufacturer in the realm of water system valves, Suzhou Walter Flow Control Equipment Co., Ltd. excels in delivering premium 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. A selection of our products proudly carries the esteemed FM/UL Certification. At Walter, customer experience is at the forefront of our mission, offering specialized advice and bespoke fluid control solutions. We are ever-ready to embrace custom designs and unique requirements to exceed expectations and refine your experience.
We warmly invite your inquiries and eagerly anticipate the opportunity to cater to your needs with excellence!
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