siemens西门子 VVF53.40-25 VVF53.50-31.5 VVF53.50-40 两通调节阀

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Nodular cast iron EN-GJS-400-18-LT valve body
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DN 15…40
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kvs 0.16…25 m3/h
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Can be equipped with SAX..-electromotoric or SKD..- or SKB..- electrohydraulic actuators