Flange Ball Valve
Introducing the QFBV Series - Your Gateway to Excellence
The WALTER QFBV model Flange Ball Valve represents the zenith of engineering excellence. With its full bore quarter-turn mechanism, it's perfect for seamless on/off applications. This adaptable valve caters to both manual and automated operations, be it electric or pneumatic. Its innovative 2-piece construction guarantees easy maintenance, ensuring a prolonged service life. This makes it the preferred choice for a wide spectrum of industrial applications and utility services. Furthermore, it offers a broad selection of seating options to meet various industry needs. and a wide range of body materials allow it to serve an expansive array of industrial applications with exceptional versatility.
Application Range
• Perfectly suited for Pump Stations
• Ideal for efficient Water Supply Systems
• Crucial for Water Treatment and Distribution Systems
• Suitable for diverse Tank applications
• Effective in Power Station Cooling Lines
Testing
▪ Undergoes a Rigorous Body Strength Test: BS EN 12266-1: 1.5 x PN
▪ Executes a Precision Seat Tightness Test: BS EN 12266-1: 1.1 x PN
Proudly adheres to ISO 5208 Rate A standards
▪ Includes 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
• Ingeniously crafted from a durable two-piece ductile iron body, its full bore design elevates flow efficiency.
• Features floating seat and spherical seat, coupled with floating ball and adaptive sealing technology. Its fireproof construction makes it ideal for fire protection pipelines, ensuring unmatched safety and reliability.
• Symmetrically engineered valve seat for non-directional switching, facilitating easy installation, sealing, and pressure handling.
• Equipped with a wear-resistant bushing on the valve stem, ensuring low torque operation and extended longevity. The innovative self-tightening upper seal mechanism ensures the valve stem remains leak-free, even under high pressure conditions.
• Upper flange conforms entirely to the ISO5211 standard, guaranteeing universal compatibility.
• The ball undergoes either solution treatment or hard chrome plating, ensuring superior material stability and surface wear resistance. This enhances sealing performance and prolongs the product's lifecycle dramatically.
• The handle boasts a positioning lock design, facilitating 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. Suzhou Walter Flow Control Equipment Co., Ltd. stands as a premier manufacturer specializing in advanced water system valves. We deliver exceptional OEM solutions for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and other international standard valves. Many of our offerings proudly carry the esteemed FM/UL Certification. At Walter, we emphasize consumer satisfaction by providing expert guidance and bespoke fluid control solutions. We are committed to accommodating custom designs and unique requirements to not just meet but exceed your expectations.
We eagerly welcome your consultations and are excited to fulfill your valve needs with unmatched expertise and dedication!
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