阀门厂家排名前100 半球阀工作原理是什么呢

阀门厂家排名前100：

1. Velan Inc. 2. Crane Co. 3. Watts Water Technologies, Inc. 4. Flowserve Corporation 5. Kitz Corporation 6. Siemens AG 7. Pentair Valves & Controls 8. Tyco Valves & Controls 9. Emerson Electric Co. 10. Metso Corporation 11. Mueller Industries, Inc. 12. Weir Group PLC 13. Circor International, Inc. 14. Pentair plc 15. Flomatic Corporation 16. Pentair Pumps & Controls 17. Hayward Flow Control 18. Haws Corporation 19. Nivus GmbH 20. KSB Group 21. Xylem Inc. 22. Rheinhütte Pumpen GmbH 23. GF Piping Systems 24. Grundfos Holding A/S 25. ITT Corporation 26. LK Armatur AB 27. Rotork plc 28. Metraflex Company 29. KARL DOSE GmbH & Co. KG 30. A.R.I. Flow Control Accessories Ltd. 31. AVK Holding A/S 32. Oventrop GmbH & Co. KG 33. LESER GmbH & Co. KG 34. Bray International, Inc. 35. AVK Southern Africa Pty Ltd. 36. NIBCO Inc. 37. Belimo Automation AG 38. Zwick Armaturen GmbH & Co. KG 39. Neway Valves 40. Georg Fischer AG 41. Victaulic Company 42. KTM Pumps & Valves Ltd. 43. Fluidline Controls Ltd. 44. OEG Offshore Ltd. 45. KITZ Corporation of America 46. A.Y. McDonald Manufacturing Co. 47. SCOX-ARCA 48. Crane Supply 49. Lunkenheimer Valves 50. Crane Fluid Systems Ltd. 51. Val-Matic Valve & Manufacturing Corp. 52. Bürkert Werke GmbH 53. Fluid Controls Ltd. 54. Xomox Corporation 55. Wärtsilä Corporation 56. Crane Energy Flow Solutions 57. Crane Valve & Meter Group 58. Rheinhütte Pumpen GmbH & Co. KG 59. KITO Corporation 60. A-T Controls, Inc. 61. Schlumberger Ltd. 62. LESER GmbH & Co. KG 63. TATI Valvole S.p.A. 64. KARL DOSE GmbH & Co. KG 65. Cameron International Corporation 66. SchuF GmbH 67. Bonomi S.p.A. 68. L&T Valves Ltd. 69. Kimray, Inc. 70. Apollo Valves 71. Alfa Laval AB 72. KITZ Corporation of America 73. Wenzhou Royal Valve Co., Ltd. 74. Weir Valves & Controls USA, Inc. 75. AVK International A/S 76. Jomar Valve, Inc. 77. WEG S.A. 78. Lutz-Jesco GmbH & Co. KG 79. Richter Chemie-Technik GmbH & Co. KG 80. KTM Pumps & Valves Ltd. 81. AVK Southern Africa Pty Ltd. 82. SFC KOENIG GmbH 83. SPX Corporation 84. Cameron International Corporation 85. Globe Valves Ltd. 86. Fluidline Controls Ltd. 87. AVK Valves, Inc. 88. Flowserve Corporation 89. Flowserve Valves & Automation, Inc. 90. KITO Corporation 91. Val-Matic Valve & Manufacturing Corp. 92. Flow-Tek, Inc. 93. KITZ Corporation of America 94. Jamesbury Corporation 95. Anderson Greenwood & Co. 96. Flow Control Solutions Ltd. 97. ValvTechnologies, Inc. 98. Circor International, Inc. 99. Crane Fluid Systems Ltd. 100. WEG S.A.

半球阀工作原理是什么呢：

半球阀是一种常用的流体控制装置，它具有良好的密封性能、结构简单、操作方便、维修保养简单等特点，它的工作原理是：当阀门开启时，阀门底端和流体连接，流体从阀门底端进入阀体，一部分流向阀门开口，另一部分流向阀门上端，从而形成减压，使阀门上部关闭。当阀门关闭时，流体因受到压力的作用，压力的大小将决定是否关闭阀门，当阀门完全关闭时，流体将完全堵塞，从而达到控制流体的目的。