Sandblast nozzle with wear resistant sealing device and lock-on mechanism

A sandblast valve, comprising:

• a nozzle in communication with a source of sand under pressure;
• a lever arm having a sealing member at an end thereof;
• biasing means engaging said lever arm for urging said sealing member into sealing engagement with said nozzle;
• and
• locking means interposed between said lever arm and said nozzle for preventing closure of said lever arm with said nozzle under urging of said biasing means, said locking means comprising a finger selectively engageable with said lever arm and a ring carrying said finger, said ring being rotatable about an axis.

A sandblast valve, comprising:

• a nozzle in communication with a source of sand under pressure and adapted to pass such sand therethrough;
• a lever arm;
• and
• a sealing member at an end of said lever arm, said lever arm being adapted to move said sealing member into and out of sealing engagement with said nozzle, said sealing member comprising a resilient cylindrical block having a wear piece attached thereto, said wear piece being tubular and axially receiving said cylindrical block, said cylindrical block and said nozzle not being coaxial during any state of operation of the valve, and wherein said nozzle emits said sand in a stream, said wear piece being positioned to engage said stream before said resilient block engages said stream upon sealing actuation of said sealing member.

A sandblast valve, comprising:

• a nozzle in communication with a source of sand under pressure and adapted to pass such sand therethrough;
• a lever arm;
• and
• a sealing member at an end of said lever arm, said lever arm being adapted to move said sealing member into and out of sealing engagement with said nozzle, said sealing member comprising a resilient disc block having a wear piece attached thereto, said wear piece comprises a ring circumferentially surrounding said disc, said disc and said nozzle not being coaxial during any state of operation of the valve;
• and wherein said nozzle emits said sand in a stream, said wear piece being positioned to engage said stream before said resilient block engages said stream upon sealing actuation of said sealing member.