Flange Ball Valve
Introducing the QFBV Series - Your Gateway to Excellence
The WALTER QFBV model Flange Ball Valve is a remarkable testament to advanced engineering, offering an unrivaled full bore quarter-turn mechanism, perfect for effortless and efficient on/off operations. This adaptable valve accommodates both manual and automated options - be it electric or pneumatic. Its intelligent 2-piece construction allows for easy maintenance, ensuring a prolonged service life. It is the premier choice for a multitude of industrial applications and utility services. Furthermore, it boasts an expansive selection of seating options and body materials, enabling it to meet the demands of a wide spectrum of industrial applications.
Application Range
• Perfectly suited for Pump Stations
• Ideal for Water Supply Systems
• Essential for Water Treatment and Distribution Systems
• Suitable for use in Tanks
• Efficiently serves Power Station Cooling Lines
Testing
▪ Undergoes a 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 for assured quality
▪ Comprehensive Pressure Testing in accordance with 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
• Engineered with a durable two-piece ductile iron body that features a full bore design, enhancing flow efficiency.
• Integrates floating seat, spherical seat, floating ball, and adaptive sealing technology. Equipped with a fireproof design, it is optimized for fire protection pipelines, ensuring safety and reliability under all conditions.
• Symmetrically crafted valve seat allows for non-directional switching, seamless installation, superior sealing, and optimal pressure handling.
• The valve stem is fitted with a wear-resistant bushing, guaranteeing low torque operation and an extended lifespan. The innovative self-tightening upper seal design ensures zero leakage from the valve stem even under high-pressure scenarios, offering unmatched reliability.
• The upper flange fully complies with the ISO5211 standard, ensuring universal compatibility with various systems.
• Ball receives solution treatment or hard chrome plating to ensure superior material stability and surface wear resistance, thereby enhancing sealing performance and significantly extending the product's lifecycle.
• The handle is designed with a positioning lock for effortless 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 committed and specialized manufacturer in the realm of water system valves, Suzhou Walter Flow Control Equipment Co., Ltd. delivers exceptional OEM solutions for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and a broad array of international standard valves. A selection of our products is honored with the esteemed FM/UL Certification. At Walter, we put consumer experience at the forefront by providing expert advice and customized fluid control solutions. We also embrace custom designs and special requirements to surpass client expectations.
We cordially invite your consultation and eagerly anticipate the opportunity to serve your needs with excellence!
){kind=link}