技术文章
J402-610 美国UE高压压力开关 UE西北
J402-610 美国UE高压压力开关 UE西北
J402-610 J402-612 J402-16014 J402-616 美国UE压力开关 303不锈钢活塞，带有丁晴橡胶O型圈，303不锈钢压力接口1/4NPT 不适用于气体介质。
美国UE开关的防护标准
NEMA防护等级是美国电气制造商协会工业控制装置和系统中的外壳防护标准。NEMA的防护标准除了防尘、防水之外，还包括防爆(IP代码只包括防尘和防水)。
NEMA 4X ：（水封、尘封、防腐蚀、室内或室外用外壳）：计划用于室内或室外，主要为了提供一定程度的保护，以防止腐蚀、飞扬粉尘和雨水、溅水、软管引出水、以及由于外部结冰引起的破坏。
NEMA 4X 相当于IP66 二者有什么区别？
NEMA 7X、NENA 9X（J120系列，针对于防爆开关）
J400系列压力，差压开关
J400-164 J400-270 J400-274 J400-16014 J403-144 J403-146 J403-156 J403-164
J400-440 J400-441 J400-442 J400-443 J403-126 J403-134 J403-137 J400-S144B
J400-448 J400-449 J400-450 J400-S126B J403-358 J403-376 J403-610 J403-614
J400-451 J400-452 J400-453 J400-454 J403-571 J403-572 J403-361 J400-S137B
J400-550 J400-551 J400-552 J400-S134B J400-553 J400-554 J400-555 J403-570
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
J402-572 J402-358 J402-361 J402-376 J403-551 J403-552 J403-553 J400-S164B
J402-610 J402-614 J402-126 J402-S126B J403-452 J403-453 J403-454 J403-550
J402-134 J402-137 J402-144 J402-146 J403-449 J403-450 J403-451 J400-S156B
J402-156 J402-164 J402-270 J402-S137B J403-441 J403-442 J403-443 J403-448
J402-574 J402-440 J402-441 J402-442 J402-454 J402-550 J402-551 J402-S146B
J402-443 J402-448 J402-449 J402-S144B J402-450 J402-451 J402-452 J402-453
J403-S164B J400K-S127B J400K-S134B J403-554 J402-554 J400K-134 J400K-157
J403-555 J403-S126B J403-S134B J403-S137B J400K-137 J400K-144 J400K-146
J400K-156 J400K-455 J400K-S137B J400K-S144B J403-S144B J403-S146B J403-S156B
J402-552 J402-553 J402-612 J402-555 J402-535 J402-570 J402-571 J402-16014
J400-570 J400-571 J400-572 J402-S156B J402-531 J402-532 J402-533 J402-534
J400-358 J400-361 J400-376 J400-610 J402-524 J402-525 J402-530 J402-S134B
J400-614 J400-126 J400-134 J402-S164B J402-520 J402-521 J402-522 J402-523
J400-137 J400-144 J400-146 J400-156 J403-270 J403-274 J403-440 J400-S146B
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