ASCO551系列电磁阀用于气动阀门“开启”或“关闭”的电控操作。符合NAMUR连接标准，直接安装在气动执行器侧面，无需管子连接。根据仪表控制系统需要选择单电控或双电控。二位五痛电磁阀配双作用式执行器。二位三通电磁阀配单作用式执行器。同时该产品有基本型（IP67）和防爆型，防爆级别为EXD II BT4，其防爆级别适用于工厂的易爆环境场所。也可根据需要选择合适的电压。

ASCO551 series solenoid valves for pneumatic valves "open" or "turn off" the electric-controlled operation. Consistent with the NAMUR standard to connect directly installed in the pneumatic actuator side without the tube connection. Instrument control system in accordance with required select single or double electric control electric control. Two five pain with double acting solenoid valve actuator. 2 solenoid valve with three single-action actuators. At the same time the product has a basic type (IP67) and Explosion-proof, explosion-proof level for EXD II BT4, its explosion-proof level applicable to the factory premises explosive environment. May also select the appropriate voltage required