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               Manual 
                Venturi 
                 
                The manual vacuum generator is a low cost, yet effective vacuum source. It uses 
                compressed air to generate vacuum, utilizing the Venturi effect. They 
                were designed to provide an alternative low cost solution for 
                those who do not have the budget for a fully regulated 
                system. The unit provides the advantage of a portable system for use in various countries with different electrical supply. 
              The 
                VG 2 and VG 4 are manually controlled. They incorporate a manual 
                valve which controls the air flow from the compressor and a check 
                valve that prevents back-flow of air into the press once the air 
                is turned off. A cleanable in-line air filter protects the unit and a silencer muffles exhaust noise to 68 db. 
              When 
                vacuum is achieved the operator may close the air valve. This 
                eliminates excessive use of shop air and frequent cycling of the 
                shop's air compressor. To maintain the vacuum level inside the press
                the operator occasionally opens the air valve or leaves the air valve
                slightly open to let air bleed continuously through the venturi. See warranty on contact page. 
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