Thiết bị đo lưu lượng Kobold DWU, DWS, DWP
KOBOLD Model DWU, DWS and DWP Paddle/Bellows Flow Meter and Switches are based on the paddle, or static plate, principle. This type of arrangement is ideal for use in applications where dirt and solid grain contaminants are of concern. The paddle-bellows arrangement offers large internal clearances and mechanical insensitivity to a wide range of particulate matter.
Operation
The simplicity of the DW Series Paddle/Bellows Flow Meter and Switches design is its major asset. The devices operate as follows:
- The flow causes the paddle, or static plate to be deflected in the direction of flow against the force of a spring. A bellows, made of bronze (or preferably stainless steel), hermetically isolates the medium from the measuring/indicating section. The motion of the paddle is transmitted directly to a mechanical indicator and switch, or to a signal conditioner in the case of analog output versions.
- The DW Series of Paddle/Bellows Flow Meter and Switches comes in a variety of mounting styles. Units are available mounted in a pipe TEE for in-line installation into pipes to 2-1/2" with either threaded or flanged ends. For larger pipe applications, the DW is available in a weld-on design usable on pipes with diameters up to 24 inches.