Flange Ball Valve
QFBV Series
WALTER QFBV model Flange Ball Valve is a full bore quarter turn valve for an on/off application. It can be manual or automatic (electric or pneumatic). it's designed with 2 pieces, simple construction allow easy maintenance over a long working life, therefore preferred for industrial applications as well as for utility services. The variety of seats and body materials allows it to respond to multiple applications in the industry.
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
• Two-piece ductile iron body; full bore design.
• Floating seat, spherical seat, floating ball, and adaptive sealing. And it has a fireproof design and can be used for fire protection pipes.
• The valve seat adopts symmetrical design. Switching, installation, sealing and pressure are all non-directional.
• The valve stem adopts wear-resistant bushing design to ensure low torque and long life. The self-tightening upper seal design ensures that the valve stem does not leak under high pressure.
• The upper flange complies with ISO5211 standard.
• The ball is solution treated or hard chrome plated to ensure reliable material stability and surface wear resistance, improving sealing performance and product life.
• The handle adopts positioning lock design, which is easy to install.
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 professional manufacturer of water system valves.We can supply OEM for Sluice Valve, gate valve, flange butterfly valve, check valve, strainer, pressure reducing valve, fire hydrant and other kinds of international valves standard and specification.Some products can be offer FM/UL Certificate.Walter focus on consumer experience like offer advice and fluid control solutions to customers,in addition,we can accept custom design and special requirements.
Look forward to your consultation!
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