Flange Ball Valve
Introducing the QFBV Series - Your Gateway to Excellence
The WALTER QFBV model Flange Ball Valve is an exceptional marvel of engineering, boasting a full bore quarter-turn mechanism perfectly suited for flawless on/off operations. This adaptable valve caters to both manual and automatic functions, with options for electric or pneumatic actuation. Its clever 2-piece construction guarantees effortless maintenance, ensuring a prolonged and reliable service life, making it the preferred choice for an extensive spectrum of industrial applications and utility services. An impressive variety of seating options and body materials further enhance its capability to meet a comprehensive range of industrial demands.
Application Range
• Exceptionally suited for Pump Stations
• Ideally crafted for Water Supply Systems
• Indispensable for Water Treatment and Distribution Systems
• Perfectly applicable to Tanks
• Highly efficient in Power Station Cooling Lines
Testing
▪ Extensive Body Strength Test: BS EN 12266-1: 1.5 x PN
▪ Meticulous Seat Tightness Test: BS EN 12266-1: 1.1 x PN
Conforms to ISO 5208 Rate A
▪ Thorough 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
• Engineered with a robust two-piece ductile iron body; incorporates a full bore design for superior flow.
• Features include floating seat, spherical seat, floating ball, and adaptive sealing technology, complemented by a fireproof design that suits fire protection pipelines, ensuring unmatched safety and dependability.
• Symmetrical valve seat crafted for non-directional switching, seamless installation, sealing, and pressure regulation.
• Valve stem is enhanced with a wear-resistant bushing, ensuring low torque operation and prolonged functionality. The pioneering self-tightening upper seal design guarantees zero leakage from the valve stem even under extreme pressure conditions.
• Upper flange adheres fully to ISO5211 standards, guaranteeing universal compatibility.
• The ball is subjected to solution treatment or hard chrome plating, providing outstanding material stability and surface wear resistance, thus boosting sealing efficiency and extending the product's lifespan.
• The handle integrates a positioning lock feature for seamless installation and augmented 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 leading and specialized manufacturer in water system valves, Suzhou Walter Flow Control Equipment Co., Ltd. delivers superior OEM offerings for Sluice Valves, Gate Valves, Flange Butterfly Valves, Check Valves, Strainers, Pressure Reducing Valves, Fire Hydrants, and various valves conforming to international standards. Our products proudly hold the esteemed FM/UL Certification. At Walter, we prioritize the customer's experience by providing expert guidance and bespoke fluid control solutions. We readily accommodate custom designs and special requirements to not just meet, but exceed expectations.
We warmly extend our invitation for your consultation and are eager to fulfill your unique needs!
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