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NIKKISO HYDROCHEK® |
PVC Calibration Column
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Features:
Transparent Column - 360° Viewable.
Sizes to Match any Metering Pump.
Corrosion Resistant Construction.
Easy to Install.
Easy to Clean.
Dual Unit (GPH/LPH) Scales.
Integral Vent Connection.
Provides Tank Level Indication.
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NIKKISO HydroChek Loss-In-Volume flow
verification systems provide a compact, cost
effective solution for applications requiring periodic
flow monitoring or pump calibration. HydroChek
Columns are used as precision, volumetrically
calibrated pump suction vessels. By calculating the
specific volume of process fluid displaced per unit
time, they verify the performance of any pump in
its specific application.
Extending beyond the range of ordinary columns,
HydroChek columns are capable of confirming
the performance of any chemical metering pump.
The columns are constructed of corrosion resistant,
fully transparent PVC, and are suitable for all
compatible fluids. The use of a transparent column
allows viewing from any angle and permits the
column to also be used as a visual indication of
supply tank level.
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Sizing Chart
Model
Number
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Column
Capacity
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Maximum*
Pump Capacity
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Process
Connection
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A
(Typ.)
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B
(Typ.)
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HCC1D08NM
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250 ml
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8.5 GPH
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1/2"
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20-1/4"
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2"
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HCC2D08NM
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500 ml
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17 GPH
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1/2"
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32-1/4"
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2"
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HCC3D12NM
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1000 ml
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32 GPH
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3/4"
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29"
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2-3/4"
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HCC4D12NM
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2500 ml
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78 GPH
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3/4"
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56-3/4"
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2-3/4"
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HCC5D32NM
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5 liter
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150 GPH
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2"
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38"
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5-1/8"
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HCC6D48NM
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10 liter
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300 GPH
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3"
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61-1/4"
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5-1/8"
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HCC7D64NM
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25 liter
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750 GPH
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4"
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63-1/4""
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7-1/2"
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*Maximum pump capacities shown are based on thirty second test.
Column sizing is based on usable scale length.
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Recommended Installation
Installation
Install the NIKKISO HydroChek calibration column vertically in the suction line between the metering pump and the supply tank. Since the Hydrochek is filled by gravity, the supply tank must have sufficient volume and elevation to fill the column prior to the test.
The use of full-port valves, to provide unrestricted flow, is mandatory in the suction and column supply piping (These are available from NIKKISO).
Install vent piping from the top of the column vertically to a point above the liquid level of the supply tank. It is preferable to run an overflow line back to the supply tank as shown. The line must not be valved.
Note: Never use a calibration column on the discharge side of a pump. This is not a pressure vessel -- maximum pressure is 20 psig. This unit must be vented to atmosphere when in use.
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Operating Instructions
An accurate chronometer (stopwatch or wristwatch with precision second indication) and an appropriately sized calibration column are required for the following procedure.
With sufficient fluid level in the supply tank, open the valves in the suction and discharge piping, and turn the pump on. After the pump operation stabilizes, open the column valve to fill the calibration column.
Close one suction pipe valve when the calibration column is full. As the liquid level falls past the zero mark, start the chronometer. As the liquid level continues to drop, record the level after 30 seconds.
The scale is calibrated in both Gallons and Liters. Pump flow rate is read directly from the liquid level on the scale after 30 seconds.
When the calibration column is not in use, it should be free of process fluid and the column valve should be kept closed. Suction valves must remain open at all times -- except while performing calibration tests.
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