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Prices and product specifications:
Please note that prices and specifications listed on this site should only be taken as a guide.
All prices quoted are Ex-Works and Exclusive of VAT.

"Debit and Credit Cards Accepted"
Mancuna Non-Mechanical Vacuum Valve
Low-Cost airtight Seal for Hoppers and Dust Collectors
Photograph shows 8" & 10"
Mancuna Vacuum Valve Casing with Access Panel removed
Construction and Principle of Operation

The basic design of the Mancuna Vacuum Valve consists of two parts only, a flanged steel funnel, and a flexible rubber sleeve.

The sleeve is held in a collapsed condition by the negative pressure under which the dust collector operates. The weight of the collected material above the valve builds up until the head is sufficient to force it through the valve. The seal is then automatically re-created.

Each size can be supplied with or without a steel housing incorporating a removable panel.
Normally the sleeve consists of Neoprene Rubber which is resistant to most chemicals and will withstand temperatures up to 121°C (250°F). For higher temperatures the 8" and 10" sizes can be supplied with sleeves in Silicone Rubber, 205°C maximum (400°F).
  
The Mancuna Vacuum Valve is a non mechanical pinch type vacuum valve providing a low cost airtight seal for the discharge end of hoppers or any type of dust collector operating under negative pressure.
It is rapidly replacing mechanical type seals such as rotary valves because of the following advantages:
4Automatic Operation
4It requires no power
4The design ensures an absolute seal.
4No mechanical parts to adjust or wear out.
4Replaces expensive mechanical valves
4Automatically maintains in hopper, or dust collector
Mancuna Vacuum Valve with Mild Steel Casing
and Funnel, Neoprene & Silicone Rubber Sleeve, Worm Drive Clip 
STURDY VAC ENGINEERING LTD
      Specialists In Industrial Vacuum Cleaners & Accessories