| 摘要 |
A multi-gun control valve apparatus for use in controlling a high pressure fluid in a multiple dump-style gun fluid blast system, the apparatus including a valve cartridge assembly, with a pressure throttling member and an adjusting assembly. The apparatus maintains system pressure when any of the guns are dumping fluid rather than blasting. The adjusting assembly includes a spring-biased plunger to bias the valve closure member into a partially closed or throttling position when a gun is dumping, thereby causing a pressure drop across the closure member. The adjusting assembly is used to manually adjust the clearance between the valve closure member and valve seat while the system is under pressure. High fluid pressure in the fluid line between a dump-style fluid blast gun and the multi-gun control valve opposes the spring-biased plunger and opens the valve closure member to provide free flow through the device when a gun is blasting fluid.
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