difference between globe valve and throttle valve
время:2017/4/27
Cut-off valve, also known as the door, is the most widely used of a valve, it is popular, is due to the process of opening and closing the sealing surface friction between the small, more durable, open height is not easy to manufacture, maintenance Convenient, not only for low pressure, but also for high pressure. In this case,
Closing principle of the closing valve is to rely on the valve stem pressure, so that valve sealing surface and the valve seat sealing surface close fit to prevent the flow of media. In this case,
Cut-off valve only medium one-way flow, the installation direction. The structural length of the cut-off valve is larger than the gate valve, and the fluid resistance is large, and the reliability of the sealing is not strong in the long-term operation.
Throttle (throttle valve) and the shape of the structure is no difference between the cut-off valve, but their opening and closing pieces of the shape is different. Throttle valve opening and closing parts are mostly conical streamlined, through it to change the channel cross-sectional area to adjust the flow and pressure. Throttle for the pressure drop in the case of great pressure to reduce media use.
A throttle is a valve that controls the flow of fluid by varying the throttling or throttling length. The throttle and check valve in parallel can be combined into a one-way throttle. Throttle and one-way throttle valve is a simple flow control valve, in the quantitative pump hydraulic system, the throttle and relief valve with the composition of the three throttle speed control system, that is, into the oil throttle System, oil return throttle speed control system and bypass throttle speed control system.
Throttle valve does not flow negative feedback function, can not compensate for the change caused by the speed of the load instability, generally only for little change in the load or less speed stability requirements of the occasion.