Precision metering valve stem and needle assembly for accurate fluid dosing in industrial applications.
The stem and needle assembly is a critical component of metering valves, consisting of a stem that provides linear motion and a tapered needle that precisely regulates fluid flow through an orifice. This assembly enables accurate volumetric control of liquids or gases in dosing, dispensing, and injection systems across various industries.
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The stem is the shaft that transmits motion (typically via threads), while the needle is the tapered end that regulates flow. They may be integrated as one piece or assembled separately.
Choose based on fluid compatibility, pressure, temperature, and wear requirements. Common combinations include stainless steel stems with carbide needles for abrasive fluids.
Regular inspection for wear, cleaning of threads and sealing surfaces, lubrication of stem threads (if applicable), and calibration checks to ensure flow accuracy.
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说明目标数量、应用场景、交期和关键技术要求，用于准备 RFQ 或供应商评估。