設計容納液體或氣體和OEM廣泛需求粉末涂料提供了改進的耐腐蝕性描述63系列常微分繼電器主要用于與外部的針形閥，在連續可調范圍為液體或氣體的體積流量的結合常數。氣體流量的應用，壓縮必須如果恒流量需要考慮。因此，模型可用于恒定的上游或下游的參考壓力。液體是不可壓縮的，恒定的流量，也將是一個恒定的流量，無論上游還是下游壓力。因此，質量流量是獨立的壓力變化。繼電器的針形閥的可調范圍和容量的確定。四種模式可供選擇。規格范圍：@ 20 psig供應模型和模型63bu 63su：zui大1.1 SCFMzui低：0.01 SCFM模型及模型63bul 63sul：zui大：2800 sccm的zui低：13 sccm的供應壓力：zui小：至少5磅大于針閥控制器組合zui大的下游壓力。

Features & Benefits       Versatile and design accommodates liquids or gases and wide range of OEM needs       Powder coating provides improved corrosion resistance Deion       The Series 63 Constant-Differential Relays are used in conjunction with an external needle valve to provide constant volume flow rates of liquids or gases over a continuously adjustable range.        For gas flow applications, compressibility must be considered if a constant mass flow is desired. Therefore, models are available for constant upstream or downstream reference pressure.        For liquids, which are not compressible, the constant volume flow will also be a constant mass flow, regardless of upstream or downstream pressures. As such, mass flow is independent of pressure changes.        The relay’s needle valve determines rangeability and capacity.          Four models are available. Specifications Range Limits ：@20 psig supply                     Model 63BU & Model 63SU：Maximum: 1.1 scfm    Minimum: 0.01 scfm                     Model 63BUL & Model 63SUL：Maximum: 2800 sccm    Minimum: 13 sccm Supply Pressure：Minimum: At least 5 psi greater than the maximum downstream pressure of the needle valve-controller combination

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