美国UE防爆差压开关J120K-147不锈钢差压开关
J120K系列UE差压开关的常用型号：
J120K系列：J120K-36 J120K-37 J120K-38 J120K-39 J120K-147 J120K-157 J120K-367
J120K-455 J120K-456 J120K-457 J120K-540 J120K-541 J120K-542 J120K-543
J120K-544 J120K-545 J120K-546 J120K-547 J120K-548 J120K-559 J120K-S147B
UE差压开关可选项
0101 双刀双掷（DPDT）开关
M210 工厂对开关进行单点设定
M202 工厂对开关进行双点设定
M440 带链盒盖
M540 氟橡胶结构，标准压力接口，型号455-457表示氟橡胶膜片和O型圈及Teflon主膜片
M550 氧清洗处理
差压开关的工作原理
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，*终启动*上端的微动开关，使电信号输出。
H121K-599??H121K-S147B??H121K-S157B??H122K-S147B??H122K-S157B??J21K-16021
H122K-147??H122K-157??H122K-456??H122K-457??H121K-147??H121K-157??H121K-456
H121K-457??H402K-456??H402-S144B??H400K-559??H402K-455??H402K-559??H400K-455
J21K-16020??H122K-599??J21K-127??J21K-134??J21K-137????J21K-156??H400K-457
J21K-157??J21K-232??J21K-254??J21K-357??J21K-367??J21K-S127B??J21K-S147B??J21K-144
H100K-547??H100K-548??H100K-540??H100K-541??H100K-542??H100K-543??H100K-544
J120K-S147B??J120K-37??J120K-38??J120K-39??H117K-541??H117K-548??J21K-S157B
J120K-147??J120K-157??J120K-367??J120K-455??J120K-548??J120-555??J120K-S157B
J120K-544??J120K-545??J120K-546??J120K-547??J120K-456??H117K-540??H117K-547
J120K-457??J120K-599??J120K-540??J120K-541??J120K-542??J120K-543??H117K-544
H100K-545??H100K-546??H117K-542??J400K-S127B??J400K-S134B??J400K-134??J400K-157
H117K-546??H117K-545??H117K-543??J400K-137??J400K-144??J400K-146??J120K-36
J400K-457??J400K-599??J402K-127??J400K-127??J400K-544??J402K-S146B??J402K-S144B
J402K-137??J400K-S146B??J400K-S156B??J402K-545??J402K-546??J402K-547??J402K-548
J402K-134??J402K-144??J400K-456??J402K-543??J402K-544??J402K-S157B??J402K-S156B
J402K-146??J402K-156??J400K-S157B??J402K-S127B??J402K-540??J402K-541??J402K-542
J402K-157??J402K-455??J402K-456??J402K-457??J402K-599??J402K-S134B??J402K-S137B
J400K-156??J400K-455??J400K-S137B??J400K-S144B??H121K-S157B??H402K-457??H400K-456
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