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Typical flow rates are 100 gallons per minute or 6 litres per second – but bespoke versions are available to take very high fl ow rates. This is a sealed cleanroom drain
with a strong positive seal created by machining away a 0.4” (10mm) groove from a 0.6” (15mm) top plate. A 0.4” (10mm) top plate with a recessed ‘o-ring’ creates the seal. This top plate is then removable with a heavy-duty suction cup available as an accessory. They are designed for use primarily in Pharmaceutical factories. They can be used in both light duty and very heavy-duty trafficked areas (sealed gullies are most often used in laboratories or cleanrooms which are limited to pedestrian traffic – however the 0.4” (10mm) top plate makes it possible to drive heavy factory traffic over these gullies). As standard the KVCRBWDC265/4”/6”RD takes a 0.4” (10mm) thick sealed grating but 0.4” (10mm) slotted and perforated gratings can also be used.
In most cases a dual 4”/6” or a dual 6”/8” SCH10 outlet is required because these are most popular with American Multinational Pharmaceutical companies who have scheduled stainless steel pipework to connect to, but this can easily be substituted for a 110mm/160mm or 160mm/220mm outlet pipe for European & other projects connecting with polypropylene pipework.
These drains are always supplied without the internal foul air trap – a P bend is available as an option.
Flow rate can be restricted by the slotted cover, the debris basket or the Cross Sectional Area (CSA) of the pipework. Use of a P-Trap reduces flow rate by approximately 15% due to geometry. The slotted cover reduces the flow rate from 6.3 to 6.1 L/s (97.8 US GPM). Flow rates are based on 2” (50mm) head of water above the top of the drain.
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