Flange Ball Valve
Introducing the QFBV Series - Your Gateway to Excellence
The WALTER QFBV model Flange Ball Valve is a top-tier showcase of engineering excellence. It features a full bore quarter-turn mechanism, making it the ideal choice for flawless on/off operations. This adaptable valve supports both manual and automatic control, either electric or pneumatic. Its clever 2-piece design guarantees easy maintenance and ensures a prolonged service life. It stands as the preferred solution for a wide variety of industrial applications and utility services. Additionally, it offers a comprehensive range of seating options. The extensive selection of body materials enables it to meet the demands of a diverse range of industrial applications.
Application Range
• Perfectly suited for Pump Stations
• Ideal choice for Water Supply Systems
• Integral to Water Treatment and Distribution Systems
• Suitable for use in Tanks
• Highly efficient for Power Station Cooling Lines
Testing
▪ Undergoes Rigorous Body Strength Test: BS EN 12266-1: 1.5 x PN
▪ Precision-engineered Seat Tightness Test: BS EN 12266-1: 1.1 x PN
Fully compliant with ISO 5208 Rate A standards
▪ Executes 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
• Constructed with a robust two-piece ductile iron body, featuring a full bore design to optimize flow.
• Includes a floating seat, spherical seat, floating ball, and adaptive sealing technology. The valve is also fireproof, making it ideal for fire protection pipelines, thus ensuring maximum safety and dependability.
• Features a symmetrically designed valve seat for non-directional switching, installation, sealing, and pressure management.
• The valve stem is equipped with a wear-resistant bushing, offering low torque operation and extended durability. Its self-tightening upper seal design guarantees zero leakage from the valve stem, even under high-pressure conditions.
• The upper flange strictly adheres to ISO5211 standards, ensuring universal compatibility across systems.
• The ball undergoes solution treatment or hard chrome plating, which ensures exceptional material stability as well as surface wear resistance, significantly enhancing sealing performance and extending the product's lifecycle.
• The handle incorporates a positioning lock design for easy installation and heightened 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 dedicated and professional manufacturer specializing in water system valves, Suzhou Walter Flow Control Equipment Co., Ltd. excels in providing top-tier OEM options for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and a variety of international standard valves. Many of our offerings proudly possess the coveted FM/UL Certification. At Walter, we prioritize delivering an exceptional consumer experience by offering expert guidance and bespoke fluid control solutions. Furthermore, we enthusiastically embrace custom designs and special requirements to not just meet, but exceed your expectations.
Join us today for a consultation, and experience our commitment to fulfilling your needs!
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