FB series
Our full bore knife gate valve combines the proven Wey middle flange design with a completely free passage. Perfectly suited for all applications where pipes and valves need to be cleaned regularly with pigs. Specially designed scrapers remove deposits from the gate every time it is opened. The FB knife gate valve has already been installed in numerous plants for thermal sea or lake water utilization and has proven itself in the fight against the quagga mussel.
cHARACTERISTICS fb sERIES
Nominal sizes
Material
Pressure rating
Flange drilling
Face to face dimension
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A completely round passage enables easy pipe cleaning with a pig.
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Bronze scrapers clean the gate every time it is opened.
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The transverse seal can be repacked at any time and under full pressure using the lateral packing screws.
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In the closed end position, the gate is also mechanically supported.
Application areas
Water treatment
e.g.
Seawater, Saltwater
...
Case Study – Thermal lake water system Lausanne
Knife gate valves in full bore design for Switzerland's largest lake water heat pump
PDFMaterial of construction
| Part | Ductile iron | Stainless steel |
| Body | EN-GJS-400-15 | 1.4408 |
| Gate | 1.4301 | 1.4404* |
| Seal | NBR | NBR |
| Topwork | Carbon steel | Carbon steel |
| Stem / Piston rod | 1.4104 | 1.4104 |
Other materials upon request
*hard chromed
Corrosion protection
| Body | 2 Comp. Epoxy-Zinc dust Primer, 2 Comp. Epoxy-Resin iron mica intermediate coat, 2 Comp. Polyurethane-Enamel-Top Coat | |
| Topwork | 2 Comp. Epoxy-Zinc dust Primer, 2 Comp. Epoxy-Resin iron mica intermediate coat, 2 Comp. Polyurethane-Enamel-Top Coat | |
Actuators
Handwheel
Bevel gear
Pneumatic cylinder
Hydraulic cylinder
Electric actuator
Data sheets
CAD files
- On request
News & Stories
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Valves for aerospace
This knife gate valve is part of a mission out of this world. It is used in the USA to test aerospace engines. The valve was developed with a full bore design specifically for this task.
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Full free passage
Pipelines leading into open waters always bear the risk of deposits caused by mussels or other organic material. To ensure that regular cleaning by pigging can be carried out without any problems, we manufacture our valves in a full bore version at the customer's request.
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Full Bore
Fullbore for all cleaning methods: For a thermal lake water plant, the body of this knife gate valve was specially manufactured to allow pigs to pass through with ease.
