DV511 Zero-drip micro-dispensing needle valve

DV511 has a needle sealing structure, which uses a thimble to hold the inner outlet of the needle. The amount of residual glue between the valve seal and the needle tube outlet is minimized. When using solvent-containing and volatile low-viscosity glue, it can effectively reduce the amount of solvent The volatilization causes the glue to overflow at the exit of the needle steel tube and cause accumulation. Precision fine-tuning mechanism,

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