62-VNA 系列常差分继电器简单介绍 The ability to maintain constant-differential pressure drop across a built-in needle valve ensures a constant volumetric flow rate Maintains constant bubbling rate in liquid level applications,eliminating the problems of typical conventional bubbling systems The ability to produce reasonable purge rates eliminates the need for a supply regulator Epoxy powder coating provides improved corrosion resistance 62-VNA 系列常差分继电器(Constant-Differential Relays)的详细介绍 Features & Benefits The ability to maintain constant-differential pressure drop across a built-in needle valve ensures a constant volumetric flow rate Maintains constant bubbling rate in liquid level applications,eliminating the problems of typical conventional bubbling systems The ability to produce reasonable purge rates eliminates the need for a supply regulator Epoxy powder coating provides improved corrosion resistance Description The Series 62-VNA Constant-Differential Relays serve as air-flow co*ollers maintaining a constant air purge for each setting of an integral needle valve. By maintaining a constant-differential pressure drop across a built-in needle valve (for any flow setting up to 2.1 cu. ft. of air per hour), Series 62 Relays ensure a constant volumetric rate of flow, regardless of variations in process or supply pressure.