Flange Ball Valve
Introducing the QFBV Series - Your Gateway to Excellence
The WALTER QFBV model Flange Ball Valve epitomizes engineering excellence, presenting a full bore quarter-turn mechanism that ensures flawless on/off applications. This remarkable valve offers both manual and automatic operations-either electric or pneumatic. Its innovative 2-piece design guarantees easy maintenance, promising an extended service life. This valve is the preferred solution for a wide range of industrial applications and utility services. Furthermore, the extensive selection of seating options and body materials provides adaptability to meet the demands of extensive industrial applications.
Application Range
• Perfectly suited for Pump Stations
• Ideal choice for Water Supply Systems
• Indispensable in Water Treatment and Distribution Systems
• Perfectly suitable for Tanks
• Highly 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
▪ 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; incorporates a full bore design for superior flow.
• Features floating seat, spherical seat, floating ball, and adaptive sealing technology. Additionally, includes a fireproof design suitable for fire protection pipelines, ensuring maximum safety and reliability.
• Symmetrically engineered valve seat for non-directional switching, installation, sealing, and pressure.
• Valve stem includes a wear-resistant bushing, facilitating low torque operation and extending lifespan. The innovative self-tightening upper seal design guarantees zero leakage from the valve stem even under high pressure conditions.
• Upper flange aligns perfectly with the ISO5211 standard, ensuring universal compatibility.
• Ball undergoes solution treatment or hard chrome plating to ensure outstanding material stability and surface wear resistance, thereby enhancing sealing performance and prolonging the product's lifecycle.
• The handle includes a positioning lock design for seamless installation and increased 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 professional manufacturer specializing in water system valves, Suzhou Walter Flow Control Equipment Co., Ltd. delivers premier OEM options for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and a myriad of international standard valves. Some of our products proudly bear the esteemed FM/UL Certification. At Walter, we prioritize customer experience by offering unparalleled expert advice and customized fluid control solutions. Furthermore, we enthusiastically embrace custom designs and special requirements to consistently exceed expectations.
We warmly invite your consultation and are excited to meet your needs with distinction!
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