<optgroup id="fewog"><table id="fewog"></table></optgroup>

    1. <em id="fewog"><label id="fewog"></label></em>
    2. <div id="fewog"><ol id="fewog"></ol></div>

      
      
      <em id="fewog"><ol id="fewog"></ol></em>
      <div id="fewog"></div>

      1. <div id="fewog"></div>
      2. <dd id="fewog"></dd>

        <em id="fewog"></em>
          1. <div id="fewog"><tr id="fewog"></tr></div>
          2. <dfn id="fewog"></dfn><div id="fewog"><tr id="fewog"></tr></div>
          3. <div id="fewog"></div>
          4. <em id="fewog"></em>
              1. <em id="fewog"><tr id="fewog"><nav id="fewog"></nav></tr></em>

                <em id="fewog"></em>

                <dd id="fewog"></dd>

              2. <div id="fewog"></div>
                    <em id="fewog"></em>

                    <div id="fewog"></div>

                  1. <em id="fewog"></em>

                      /UpLoadImage/201703/45424416.jpg

                      We expect to work with all new clients covering every corner of the world and remaining old customers together to create a bright future!

                      About Poro

                      News center

                      Three-way and four-way ball valves

                      Three-way and four-way ball valves

                      2017-03-01

                      Three-way ball valves have an L- or T-shaped hole through the middle. The different combinations of flow are shown in the figure. It is easy to see that a T valve can connect any pair of ports, or all three, together, but the 45 degree position which might disconnect all three leaves no margin for error. The L valve can connect the center port to either side port, or disconnect all three, but it cannot connect the side ports together.

                      Types of ball valve

                      Types of ball valve

                      2017-03-01

                      There are five general body styles of ball valves: single body, three piece body, split body, top entry, and welded. The difference is based on how the pieces of the valve—especially the casing that contains the ball itself—are manufactured and assembled. The valve operation is the same in each case.

                      Roro's Partner

                      Meanwhile, Helon is a qualified supplier for Sinopec, CNPC, CNOOC, CNAF, etc. and has a close cooperation with many international enterprises, trading companies and research institutions.
                      百家乐必赢手册
                      <optgroup id="fewog"><table id="fewog"></table></optgroup>

                        1. <em id="fewog"><label id="fewog"></label></em>
                        2. <div id="fewog"><ol id="fewog"></ol></div>

                          
                          
                          <em id="fewog"><ol id="fewog"></ol></em>
                          <div id="fewog"></div>

                          1. <div id="fewog"></div>
                          2. <dd id="fewog"></dd>

                            <em id="fewog"></em>
                              1. <div id="fewog"><tr id="fewog"></tr></div>
                              2. <dfn id="fewog"></dfn><div id="fewog"><tr id="fewog"></tr></div>
                              3. <div id="fewog"></div>
                              4. <em id="fewog"></em>
                                  1. <em id="fewog"><tr id="fewog"><nav id="fewog"></nav></tr></em>

                                    <em id="fewog"></em>

                                    <dd id="fewog"></dd>

                                  2. <div id="fewog"></div>
                                        <em id="fewog"></em>

                                        <div id="fewog"></div>

                                      1. <em id="fewog"></em>

                                          <optgroup id="fewog"><table id="fewog"></table></optgroup>

                                            1. <em id="fewog"><label id="fewog"></label></em>
                                            2. <div id="fewog"><ol id="fewog"></ol></div>

                                              
                                              
                                              <em id="fewog"><ol id="fewog"></ol></em>
                                              <div id="fewog"></div>

                                              1. <div id="fewog"></div>
                                              2. <dd id="fewog"></dd>

                                                <em id="fewog"></em>
                                                  1. <div id="fewog"><tr id="fewog"></tr></div>
                                                  2. <dfn id="fewog"></dfn><div id="fewog"><tr id="fewog"></tr></div>
                                                  3. <div id="fewog"></div>
                                                  4. <em id="fewog"></em>
                                                      1. <em id="fewog"><tr id="fewog"><nav id="fewog"></nav></tr></em>

                                                        <em id="fewog"></em>

                                                        <dd id="fewog"></dd>

                                                      2. <div id="fewog"></div>
                                                            <em id="fewog"></em>

                                                            <div id="fewog"></div>

                                                          1. <em id="fewog"></em>