Universal eBay Template\nFree UK \nDelivery\nFree \nReturns\nCustomer Satisfaction \nGuaranteed\nTop Customer \nFeedbackDUST COMMANDER DUST-SP Anti-Crushing Valve for Plastic Barrel / Cyclonic FilterProduct DescriptionAnti-crush valve for cyclonic filters/plastic drums. Protects your cyclone filtration system from damage due to excessive vacuumpressure. Protects the plastic barrel of your cyclone filtration system from being crushed. DUST COMMANDER DUST-SP Anti-crush valve for cyclonic filters/plastic drums. Consisting of a valve and an adjustable spring this device will automatically open to limit the maximum vacuum inside a plastic drum used with a cyclone separator and protect it from being crushed. This valve is recommended for use with DUST COMMANDER CLC, DLX and HD models mounted on plastic drums (60l max recommended). This valve is not useful for use with our DUST COMMANDER XL and XL+ filters as the vacuum generated by the HVLP (high volume, low pressure) systems is not suffic.