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主要功能
头不受压力波动的冲击。
工作原理
流体从背压阀进口进入，被膜片阻挡，于是流体对膜片产生向上的压力。当压力足够大时，弹簧被压缩，流体顶起膜片形成通道，从背压阀出口流出；若流体压力不够，就会形成憋压，使进口压力上升直到达到额定压力，顶起膜片形成通路。
背压阀的额定压力可调节，一般通过调节弹簧上端的顶杆，从而调节弹簧的长度来实现。（若无法显示动画效果，可点开大图观看）SUN NCEB-LCN-OHA7
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SUN YEV/S OCDS K1
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SUN A606-064-D03
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SUN FDC1-10-0-44+C-10-4R1/2
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SUN 5895A-N
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SUN RKVC25+ESH32
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SUN 节流阀NFDD LGN
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SUN VX2221A-00-3DL-110VAC阀
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SUN CBCA-LIN-EBA/M
SUN RDBA-LEN
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SUN V3.892.29.000
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