Product Name: Flange Ball Valve
Model Series: QFBV Series
Introducing the WALTER QFBV Model Flange Ball Valve, an exceptional full bore quarter turn valve specifically crafted for on/off applications. Versatile in nature, it can be operated both manually or automatically via electric or pneumatic means. With its smart two-piece design, this valve ensures straightforward maintenance and a prolonged service life, making it the preferred choice for industrial applications and utility services alike. Experience efficiency and reliability with this comprehensive solution. The extensive selection of seat and body materials ensures adaptability across a diverse range of industrial applications.
Vast Application Range
• Robust Pump Stations
• Comprehensive Water Supply Systems
• Advanced Water Treatment and Distribution Systems
• Efficient Tank Operations
• Cooling Lines in Power Stations
Rigorous Testing Protocols
▪ Body Strength Test: Adhering to BS EN 12266-1 standards, tested at 1.5 x PN
▪ Seat Tightness Test: Conducted as per BS EN 12266-1, tested at 1.1 x PN
Complies with ISO 5208 Rate A for precision and quality assurance
▪ Pressure Testing follows stringent BS EN ISO 5208 guidelines for optimal safety and performance
Comprehensive 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 |
Outstanding Features
• Robust two-piece ductile iron body with a full bore design for superior flow.
• Innovative floating seat, spherical seat, and floating ball with adaptive sealing. Designed to be fireproof, ideal for fire protection pipes.
• Symmetrical valve seat design ensures non-directional switching, installation, sealing, and pressure.
• Wear-resistant bushing design on the valve stem guarantees low torque operation and extended lifespan. The self-tightening upper seal ensures no leakage under high pressure.
• Upper flange is manufactured in compliance with ISO5211 standards for universal application.
• Solution-treated or hard chrome plated ball ensures exceptional material stability and surface wear resistance, enhancing sealing performance and product longevity.
• The ergonomic handle with a positioning lock design allows for straightforward installation.
Material Specification Details
| 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 |
Dimensions for 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 manufacturer specializing in water system valves, Suzhou Walter Flow Control Equipment Co., Ltd. excels in providing OEM solutions for a diverse range of valves including sluice valves, gate valves, flange butterfly valves, check valves, strainers, pressure reducing valves, and fire hydrants, all aligning with international standards and specifications. Some of our offerings are FM/UL certified. Walter is deeply committed to enhancing customer experience by offering expert advice and fluid control solutions, with the flexibility to accommodate custom designs and unique specifications.
We eagerly await your inquiries and consultations!
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