Different Types Of Abrasive (Sand) Blasting - Truths Two, siphon and pressure, are dry and one is damp: A siphon blast system (suction blast system) uses the compressed air to develop vacuum in a chamber (called the blast gun). The unfavorable pressure pulls abrasive into the blast weapon where the http://best-sandblaster90009.ampblogs.com/What-Does-Different-Types-Of-Abrasive-Sand-Blasting-Mean--33083259