J400K-455美国UE开关UE滤网差压控制器UE压力开关J400K-455差压范围：12.4-199mbar耐压：15.5bar丁晴橡胶膜片1/4NPT压力接口3/4NPT电气接口J400K-455-1010J400K-455-M540差压开关常用型号J400K-455-XY468J400K-456-XY468J400K-457-XY468SPDT差压开关J400K-455J400K-456J400K-457J400K-559DPDT差压开关J400K-455-1010J400K-456-1010J400K-457-1010J400K-559-10102*SPDT差压开关J402K-S147BJ402K-S157BJ402K-147J402K-157J402K-455J402K-456J402K-457J402K-559差压开关工作原理差压开关由2个膜盒腔组成，两个腔体分别由两片密封膜片和一片感差压膜片密封。高压和低压分别进入差压开关的高压腔和低压腔，感受到的差压使感压膜片形变，通过栏杆弹簧等机械结构，启动上端的微动开关，使电信号输出。性能特点：●1,2和3个开关量信号输出●环氧树脂涂层和铸铝结构的壳体满足NEMA4X的标准●有多种压力构件和材料的选择●设定时有参考刻度或六角螺钉调节●通过FM认证。J400K-455差压范围型号可调整压力范围死区耐压刻度盘分度接液材质压力接口J400K-45512.4-199mbar6.9-20.7mbar15.5bar-1-15.5bar***橡胶膜片及O型圈1/4NPTFJ400K-4560.1-1.4bar6.9-20.7mbar15.5bar-1-15.5bar***橡胶膜片及O型圈1/4NPTFJ400K-4570.2-2.1bar6.9-27.6bar15.5bar-1-15.5bar***橡胶膜片及O型圈1/4NPTF)