VALVES

Gate Valve:

                                    gate valves are designed to isolate flow.this type of valve has two useful position,fully open and fully closed. if the gates is left half opened an eddy is formed behing its disk and cause the valve to vibrate. The gate valve introduces a small pressure drop.

                                                                   GATE VALVE

Rising stem gate valve:

                                  In this the  stem is not connected directly to the handwheel.

Non-risisng stem gate valve:

                                          In a non-rising stem gate valve the stem is connected directly to the handwheel.


Globe Valve: 

                                        They are designed to throttle or regulate flow. The disc can be placed in many different positions between fully open and fully closed. Pressure drop in this valve is large because the fluid passes through a restricted opening and changes direction several times.

 

globe valve