Flange Ball Valve
QFBV Series
Introducing the WALTER QFBV model Flange Ball Valve, a marvel of engineering designed for exceptional performance in on/off applications. This full bore, quarter-turn valve offers versatile operation, available in both manual and automatic (electric or pneumatic) modes. With its robust 2-piece construction, it simplifies maintenance and promises a prolonged service life. Ideal for a variety of industrial applications as well as utility services, this valve stands out for its efficiency and durability. Thanks to a broad selection of seat and body materials, this valve is adept at accommodating a wide range of industrial applications, delivering unparalleled versatility.
Application Range
• Pump Stations
• Water Supply Systems
• Water treatment and distribution systems
• Tanks
• Power Station Cooling Lines
Testing
▪ Body Strength Test: BS EN 12266-1: 1.5 x PN
▪ Seat Tightness Test: BS EN 12266-1: 1.1 x PN
ISO 5208 Rate A
▪ 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
• Crafted with a two-piece ductile iron body, this valve features a full bore design that ensures maximum flow capacity.
• Equipped with a floating seat, spherical seat, floating ball, and adaptive sealing, it incorporates a fireproof design suitable for fire protection systems. protection pipes.
• Ingeniously designed with a symmetrical valve seat, it offers non-directional switching, installation, sealing, and pressure capabilities.
• The valve stem is engineered with a wear-resistant bushing, guaranteeing low torque and extended life. Furthermore, the self-tightening upper seal design ensures leak-proof performance under high pressure.
• The upper flange is meticulously crafted to adhere to the ISO5211 standard, ensuring a seamless fit.
• The ball undergoes solution treatment or hard chrome plating to maintain material integrity and enhance surface durability, thereby boosting sealing performance and extending product longevity.
• The handle features an innovative positioning lock design, simplifying installation and use.
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. is a distinguished manufacturer specializing in a wide range of water system valves. We provide OEM services for various valves including Sluice Valves, gate valves, flange butterfly valves, check valves, strainers, pressure reducing valves, fire hydrants, and many more, all conforming to international valve standards and specifications. Some of our products are FM/UL certified. Walter is dedicated to enhancing customer experience by offering expert advice and fluid control solutions. We also welcome custom designs and special requirements to meet diverse needs.
We eagerly await your inquiries and consultation!
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