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YK-JSF. Metal Tube Rotameter
YK-JSF series Metal Tube Rotameter (also known as metal tube variable area flowmeter or metal tube float flowmeter) features simple structure, reliable operation, wide applicability, high accuracy, and easy installation. Compared with glass tube rotameters, it offers advantages such as high pressure resistance, high temperature resistance, enhanced safety, and clear reading. It is suitable for flow measurement of opaque and corrosive media. The measuring tube and flanges are made of stainless steel (304SS or 316L). The float and internal lining are made of PTFE and 304SS or 316L.
The YK-JSF series consists of a measuring tube body, standard float, tapered tube, and magnetic coupling mechanism. Working parameters, conversion, and correction are processed by dedicated calculation software, ensuring accurate measurement performance.
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Product Parameters
| Category | Specifications | Category | Specifications |
|---|---|---|---|
| Structure Form | Integrated Type | Connection Method | Flange Type, Threaded Type |
| Housing Material | Carbon Steel, SUS304, SUS316L | Lining Material | PTFE |
| Wetted Material | 304, 316L, Hastelloy C, Titanium | Ambient Temperature | -40 ~ 60℃ |
| Process Temperature | -20 ~ 220℃ | Applicable Pressure | 0 ~ 4.0MPa (Negotiable) |
| Accuracy | ±1.0% | Electrical Interface | M20×1.5 (Negotiable) |
| Output Mode | 4~20mA, RS485, Relay | Protection Grade | IP65 |
| Certification | Intrinsically Safe, Flameproof | Power Supply Voltage | 220VAC, 24VDC |
Product Principle
The JSF series Metal Tube Rotameter is a variable-area flowmeter. In a vertical measuring tube, when fluid flows upward, the float rises until the upward force balances the weight of the float. At this point, the annular flow area between the float and the orifice plate (or tapered tube) remains constant. The annular area is proportional to the float’s position height, meaning each height corresponds to a specific flow rate. The float movement is transmitted to the external indicator via magnetic coupling, driving the pointer to move synchronously. A cam mechanism ensures a linear indication of flow value.
The electrical remote transmission type converts the flow value into a standard 4–20 mA signal through an angular displacement sensor and signal transmitter, while still providing local mechanical indication.
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