Siemens/Moore Series 63 Constant Differential Flow Relays西门子常差分流量继动器
常见型号：
63BU 63BUL 63SU 63SUL 63BD 63BDL 63SD 63SDL
Features & Benefits
Versatile and design accommodates liquids or gases and wide range of OEM needs
Powder coating provides improved corrosion resistance
Description
The Series 63SDL 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.
