Oval Gear Flow Meter
1.Summary
BTO oval gear flowmeter is a kind of direct-reading accumulating liquid flowmeter. BTO oval gear flowmeter adds transmitter mechanism on the basic of BTO flowmeter. It can be equipped flux and instant flux. It possesses many virtues such as large testing range, high precision etc.. It is widely used in flux measurement in industrial field such as oil development, oil refining, chemical, commerce, oil storage.
2.Operation Principle
Measurement is made in the testing room. There is a pair of oval gear in it. The pair of oval gear will keep rotating on the axis under the role of liquid pressure difference between inlet and outlet. Liquid flux through the flowmeter will be known by testing gears’ rotation number
As it is showed in picture 1(a), the inlet and outlet are separated by a pair of oval gear A and B. There is crescent-shaped space between Gear A and inner wall of the testing room (It is showed as shadow in the picture).There is a rotating torque while the total torque on Gear B is zero. Gear B will be rotated by driven of Gear A. The picture 1(b) shows the middle position of the two gears. When the gears turn to the position showed in the picture 1(c), Gear A will lose rotating torque while Gear B will gain rotating torque. Gear A will be rotated by driven of Gear B. It is showed in the picture1(d).
Operation Principle Picture
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3.Main technical data
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Basic errors allowance ±0.5 (±0.2)
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Max.working pressure(Mpa)1.6
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Connecting flange of pipe …GB2555-81
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Viscosity of liquid (MPa.s). 0.6-250 (up to 2000mPa.s, Pease specify in order)
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Temperature of tested medium -30-160
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Specification of oval gear flowmeter and scope of flux
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Technical data
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Type
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Connection
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Flow rate(L/H)
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0.6～2map.s
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2～8map.s
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8～200map.s
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BT-O-10
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1/2"～3/8"
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40～400
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40～400
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40～400
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BT-O-15
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Flange 4*Φ14
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380～1500
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200～1500
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150～1500
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BT-O-20
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Flange 4*Φ14
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750～3000
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400～3000
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300～3000
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BT-O-25
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Flange 4*Φ14
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1500～6000
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800～6000
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600～6000
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BT-O-40
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Flange 4*Φ18
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3000～15000
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2000～15000
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1500～15000
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BT-O-50
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Flange 4*Φ18
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4800～24000
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3200～24000
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2400～24000
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BT-O-80
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Flange 4*Φ18
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12000～60000
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8000～60000
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6000～60000
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BT-O-100
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Flange 4*Φ18
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20000～100000
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13000～100000
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10000～100000
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BT-O-150
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Flange 4*Φ18
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24000～120000
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15000～120000
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12000～120000
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