XDB803 Series Turbine flow meter

Short Description:

The XDB803 series turbine flow sensor (hereinafter referred to as the sensor) is based on the principle of moment balance and belongs to the velocity flow meter. The sensor has the characteristics of simple structure, light weight, high accuracy, good repeatability, sensitive response, easy installation, maintenance and use, etc. It is widely used in petroleum, chemical, metallurgy, water supply, papermaking and other industries. It is an ideal instrument for flow measurement and energy saving. The sensor is used in conjunction with the display instrument and is suitable for measuring liquids in closed pipes that are not corrosive to stainless steel 1Cr18Ni9Ti, 2Cr13, corundum Al2O3, and hard alloy, and are free of impurities such as fibers and particles. If it is matched with a display instrument with special functions, quantitative control and over-quantity alarm can also be performed. The explosion-proof type (ExmIIT6) of this product can be used in an environment with explosion hazards.

The sensor is suitable for media with a viscosity of less than 5×10*m²/s at working temperature. For liquids with a viscosity greater than 5×10-°m²/s, the sensor must be calibrated with real liquid before use. If the user requires a special type of sensor, the order can be negotiated. If an explosion-proof sensor is required, please indicate it in the order.

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Installation, wiring, use and adjustment

(1) Installation
The installation method of the sensor is determined by the connection method. Flange connection is used. The installation method is shown in Figure 1 and Figure 2. The installation dimensions are shown in Table 1.

1. Filter 2. Front straight pipe section 3. Impeller 4. Preamplifier 5. Housing 6. Rear straight pipe section

1. Ball bearing 2. Front guide 3. Expanding ring 4. Housing 5. Preamplifier 6. Impeller 7. Bearing 8. Shaft

(2) Terminal board wiring instructions

Table 1

	Nominal diameter （mm）	L（mm）	H（mm）	G	L’（mm）	D（mm）	d（mm）	Number of holes
XDB803-4	4	275	145	G1/2	215
XDB803-6	6	275	145	G1/2	215
XDB803-10	10	455	165	G1/2	350
XDB803-15	15	75	173	G1
XDB803-20	20	85	173	G1
XDB803-25	25	100	173	G5/4
XDB803-32	32	140	175	G11/2
XDB803-40	40	140	178	G2		ɸ110	ɸ18	4
XDB803-50	50	150	252			ɸ125	ɸ18	4
XDB803-65	65	180	278			ɸ145	ɸ18	4
XDB803-80	80	200	287			ɸ160	ɸ18	8
XDB803-100	100	220	322			ɸ180	ɸ18	8
XDB803-125	125	250	347			ɸ210	ɸ18	8
XDB803-150	150	300	367			ɸ250	ɸ22	8
XDB803-200	200	360	415			ɸ280	ɸ22	12

The sensor can be installed horizontally or vertically. When installed vertically, the fluid direction must be upward. The liquid should fill the pipe without bubbles. When installed, the liquid flow direction should be consistent with the direction of the arrow indicating the flow direction on the sensor housing. The upstream end of the sensor should have a straight pipe section of at least 20 times the nominal diameter, and the downstream end should have a straight pipe section of no less than 5 times the nominal diameter. The inner wall should be smooth and clean, without defects such as dents, scale and peeling. The pipe axis of the sensor should be aligned with the axis of the adjacent pipe, and the gasket used for connection and sealing should not penetrate into the inner cavity of the pipe.

The sensor should be kept away from external electric and magnetic fields, and effective shielding measures should be taken when necessary to avoid external interference.

In order not to affect the normal transportation of the liquid during maintenance, it is recommended to install a bypass pipe at the installation location of the sensor.

When the sensor is installed outdoors, please waterproof the amplifier and plug. The wiring of the sensor and the display instrument is shown in Figure 4.

When the fluid contains impurities, a filter should be installed. The filter mesh is determined according to the flow impurities, generally 20 to 60 mesh. When there is free gas in the fluid, a degasser should be installed. The entire pipeline system should be well sealed.

Users should fully understand the corrosion of the measured medium and strictly prevent the sensor from corrosion.

(3) Use and adjustment

When in use, the measured liquid should be kept clean and free of impurities such as fibers and particles.

When the sensor is first used, the sensor should be slowly filled with liquid, and then the outlet valve should be opened. It is strictly forbidden to impact the sensor with high-speed fluid when the sensor is in a liquid-free state.

The sensor maintenance cycle is generally half a year. When inspecting and cleaning, please be careful not to damage the parts in the measuring chamber, especially the impeller. When assembling, please pay attention to the position relationship between the guide and the impeller.

When the sensor is not in use, the internal liquid should be cleaned, and protective covers should be added at both ends of the sensor to prevent dust from entering, and then stored in a dry place.

The filter should be cleaned regularly when used, and the internal liquid should be cleaned when not in use. Like the sensor, a dust cover should be added and stored in a dry place.

The transmission cable of the sensor can be laid overhead or underground (an iron pipe should be covered when buried underground).

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