VC Kracht Gear Flow Meter

Kracht PD Flow Meter

Positive Displacement Flow Meters

Gear Flow Meter

The measuring gears are driven by the liquid flow on the principle of a gear motor.
The gears run without contact in the measuring chamber.
The bearing elements are a low-friction ball or plain bearings.
The movement of the gears is sampled without contact by means of two sensors located in the cover.
Between the sensor compartment and measuring chamber is located a pressure-resistant, non-magnetic separator plate.
When the measuring mechanism rotates by one tooth pitch, the sensor emits a signal which corresponds to the geometrical tooth volume V _gz.
The signal is converted into a square-wave signal by the preamplifier.
The two-channel sampling permits better resolution as well as recognition of the flow direction.

Construction

1 Housing

2 Cover

3 Gear

4 Preamplifier

5 Connector

6 Sensor

7 Bearing assembly

Specification

Measuring range	0.008 … 700 l/min
Measuring range	0.002… 185 gal/min
Measuring the ratio	0,25
Operating pressure	… 400 bar
Operating pressure	… 5802 psi

Series Selection/Summary of Variants

1	2	3	4	5	6	7	8
Spheroidal cast iron	Spheroidal cast iron	Spheroidal cast iron	Spheroidal cast iron	stainless steel	stainless steel	Spheroidal cast iron	stainless steel
EN-GJS-400-15	EN-GJS-400-15	EN-GJS-400-15	EN-GJS-400-15	14.404	14.404	EN-GJS-400-15	14.404
(/79 EN-GJS-600-3)
steel	steel	steel	steel	stainless steel	stainless steel	steel	stainless steel
17.139	17.139	17.139	17.139	14.462	14.462	17.139	14.462
ball bearings	ball bearings	bronze- plain bearings	carbide plain bearings	carbide plain bearings	stainless steel plain bearings	hybrid plain bearings	hybrid plain bearings
P	P	P	P	P/R	P/R	P	P
20	30	50	30	30	20	20	20
± 0.3 % at 20 cSt	± 0.5 % at 50 cSt	± 1 % at 100 cSt	± 0.5 % at 100 cSt	± 0.5 % at 100 cSt	± 0.3 % at 20 cSt	± 1 % at 20 cSt	± 1 % at 20 cSt
Measuring range
l/min
gal./min
0.008-2	–	–	–	0.02-2*	0.008-2	0.008-2	0.008-2
0.002-0.53	–	–	–	0.005-0.53*	0.002-0.53	0.002-0.53	0.002-0.53
0.02-4	–	–	–	–	0.02-4	0.02-4	0.02-4
0.005-1.06	–	–	–	–	0.005-1.06	0.005-1.06	0.005-1.06
0.04-8	–	–	0.04-8	–	0.04-8	0.04-8	0.04-8
0.01-2.1	–	–	0.01-2.1	–	0.01-2.1	0.01-2.1	0.01-2.1
0.16-16	0.16-16	–	0.16-16	0.16-16	0.16-16	0.16-16	0.16-16
0.04-4.2	0.04-4.2	–	0.04-4.2	0.04-4.2	0.04-4.2	0.04-4.2	0.04-4.2
0.2-40	–	–	0.2-30		–	–	–
0.05-10.6	–	–	0.05-8		–	–	–
0.4-80	0.4-80	0.6-40	0.3-60	0.3-60	0.4-80	0.4-80	0.4-80
0.1-21	0.1-21	0.15-10.6	0.08-16	0.08-16	0.1-21	0.1-21	0.1-21
0.6-160	0.6-160	–	0.6-100	0.6-100	0.6-160	–	–
0.16-42	0.16-42	–	0.16-26	0.16-26	0.16-42	–	–
1-250	1-250	1.2-80	1-160	1-160	1-250	–	–
0.26-66	0.26-66	0.32-21	0.26-42	0.26-42	0.26-66	–	–
2-600	–	–	–	–	–	–	–
0.53-159	–	–	–	–	–	–	–
3-700	–	–	–	–	–	–	–
0.79-185	–	–	–	–	–	–	–