Flush Bottom Outlet Disc Valves - invented by SchuF
SchuF is the inventor (in 1923) of the Disc Bottom Outlet Valve (BOV). They are ideal for draining tanks, reactors or pipelines containing non viscous media.
Model 25BS Disc rising bottom outlet valve, Photo:©SchuF
They are widely used in the Petrochemical, Pharmaceutical, Fine Chemicals, Biochemical, and mineral refining industries.
Application - as Drain or Feeding Valves
The valves are most commonly used for the dead space free draining and feeding of vessels, reactors and pipelines. Disc Bottom Outlet Valves are especially suited to low viscosity materials, or where slower vessel drainage is unproblematic.
The shorter stroke results in smaller, lighter and faster actuators, saving cost and weight. The disc rising valve is normally a flow to close design, aiding sealing performance.
The disc lowering valve Model 24 can be used on vessels with agitators as it is non intrusive. They are also widely used for driers, mixers, and filters.
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Disc bottom outlet valve |
Disc BOV with PTFE seat |
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Photos:©SchuF
Key Characteristics of SchuF Drain Valves
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Available as a disc lowering or disc raising valve
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Designed to allow complete draining of the vessel and valve
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No Deadspace, no sharp corners or edges
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No leakage to atmosphere options (with stuffing box, metal/PTFE bellow or diaphragm seal to atmosphere)
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Zero contamination features – Sterile valve also available
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All valves have a Positive seal
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Cleaning in service through flushing port(s)
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"Made to fit" - x and d1 dimensions |
BOV sampling valve combination |
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Photos:©SchuF
Disc Drain Valve Options
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Automatic Crust Breaking with Disc Rising versions
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Available in a fire safe version with certification to BS 6755 Pt.2
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Can be combined with a wafer type sampling valve
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Temperature sensors are possible through the valve
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GMP and CIP conformant
Sizing of Disc Valves
Depending on application, sizes from one inch to six inch and larger on request. Please see attached PDF files for more detailed dimension information.
Material Choice
Disc Bottom Outlet Valves are available in all materials including cast-steel, stainless steel, all nickel based alloys, Titanium, Zirconium and others. They can also be PTFE and glass lined.
Flush Bottom Disc Valve Model Numbers
18 and 24 are disc lowering variants and 19 and 25 are disc rising variants
Download Documents
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Disc Lowering BOV Dimension Sheet PDF (189 kB)
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Disc Rising BOV Dimension Sheet PDF (165 kB)
Contact Us
For further information, pricing or a brochure, please use the following link:
