Flange Ball Valve
Introducing the QFBV Series - Your Gateway to Excellence
The WALTER QFBV model Flange Ball Valve epitomizes engineering excellence, showcasing a full bore quarter-turn mechanism perfect for seamless on/off applications. Its versatile nature allows both manual and automatic operation, whether electric or pneumatic. The innovative 2-piece design ensures easy maintenance, guaranteeing a robust service life, making it the preferred choice for numerous industrial applications and utility services. Boasting a diverse selection of seating options, and body materials, it adeptly meets the needs of an extensive range of industrial applications.
Application Range
• Perfectly suited for Pump Stations
• Ideal for Water Supply Systems
• Indispensable in Water Treatment and Distribution Systems
• Suitable for Tanks
• Highly efficient in Power Station Cooling Lines
Testing
▪ Robust Body Strength Test: BS EN 12266-1: 1.5 x PN
▪ Precise Seat Tightness Test: BS EN 12266-1: 1.1 x PN
Compliance with ISO 5208 Rate A
▪ Thorough 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, featuring a full bore design for optimal flow enhancement.
• Incorporates a floating seat, spherical seat, floating ball, and adaptive sealing technology. Features a fireproof design ideal for fire protection pipelines, ensuring unparalleled safety and reliability.
• Symmetrically designed valve seat allows for non-directional switching, installation, sealing, and pressure handling.
• Valve stem is fortified with a wear-resistant bushing, ensuring low torque operation and prolonged lifespan. The innovative self-tightening upper seal design guarantees zero leakage from the valve stem even under high pressure.
• Upper flange adheres to the ISO5211 standard, ensuring universal compatibility.
• The ball undergoes solution treatment or hard chrome plating, assuring superior material stability and surface wear resistance, enhancing sealing performance and extending the product's lifespan.
• The handle incorporates a positioning lock design for effortless installation and maximum 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 |
Dimensions 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 devoted and skilled manufacturer specializing in water system valves, Suzhou Walter Flow Control Equipment Co., Ltd. delivers premium OEM options for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and a variety of other international standard valves. Some of our esteemed products proudly carry the FM/UL Certification. At Walter, we are committed to enhancing consumer experience by offering expert guidance and customized fluid control solutions. We also welcome custom designs and special requirements to exceed expectations.
We warmly invite your consultation and eagerly anticipate fulfilling your needs!
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