Flange Ball Valve
Introducing the QFBV Series - Your Gateway to Excellence
The WALTER QFBV model Flange Ball Valve is a masterpiece of engineering excellence, proudly showcasing a full bore quarter-turn mechanism that is perfectly suited for flawless on/off applications. This adaptable valve seamlessly transitions between manual and automatic operations, whether electric or pneumatic. Its brilliant 2-piece construction simplifies maintenance, ensuring a prolonged service life. This makes it the premier choice across a multitude of industrial applications and utility services. Furthermore, the wide selection of seating options and body materials enables it to adeptly address a vast spectrum of industrial applications.
Application Range
• Perfectly tailored for Pump Stations
• Ideally suited for Water Supply Systems
• Absolutely essential in Water Treatment and Distribution Systems
• Perfectly suitable for Tanks
• Highly efficient in Power Station Cooling Lines
Testing
▪ Conducts a stringent Body Strength Test in accordance with BS EN 12266-1: 1.5 x PN
▪ Carries out a precise Seat Tightness Test as per BS EN 12266-1: 1.1 x PN
Fully compliant with ISO 5208 Rate A standards
▪ Engages in a comprehensive Pressure Testing process according to 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 an enduring two-piece ductile iron body, featuring a full bore design that guarantees optimal flow.
• Features advanced floating seat, spherical seat, floating ball, and adaptable sealing technology. Additionally, it includes a fireproof design tailored for fire protection pipelines, ensuring safety and unwavering reliability.
• Engineered with a symmetrically designed valve seat for seamless non-directional switching, installation, sealing, and pressure control.
• The valve stem is equipped with an exceptionally wear-resistant bushing, promoting low torque operation and extended longevity. The cutting-edge self-tightening upper seal design guarantees zero leakage from the valve stem, even when subjected to high-pressure conditions.
• The upper flange is meticulously designed to be in full compliance with the ISO5211 standard, ensuring universal compatibility.
• The ball undergoes a solution treatment or hard chrome plating process to ensure exceptional material stability and surface wear resistance, thereby significantly enhancing sealing performance and prolonging the product's lifecycle.
• The handle is thoughtfully designed with a positioning lock feature, allowing 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 thoroughly dedicated and professional manufacturer, Suzhou Walter Flow Control Equipment Co., Ltd. specializes in producing exceptional water system valves. We offer premium OEM options for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and a variety of valves conforming to international standards. Some of our distinguished products proudly hold the esteemed FM/UL Certification. At Walter, we are committed to enhancing consumer experience by providing expert advice and bespoke fluid control solutions. Furthermore, we welcome custom designs and special requirements, consistently striving to surpass expectations.
We warmly invite your consultation and eagerly anticipate the opportunity to serve your needs!
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