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KOBOLD DVZ Series vortex flowmeters with no moving parts are the perfect solution for applications where reliability and low cost are desired. The DVZ Series vortex flowmeter senses the flow rate of low-viscosity liquids using the vortex-shedding principle. A small obstruction (bluff body) is placed in the flow path. As fluid flows across the bluff body, small, low-pressure areas (vortices) are created just behind the bluff body. The position of the vortices alternate to either side of the bluff body in a uniform pattern. The frequency of the vortices’ shift is directly proportional to flow rate. This shift in the vortices is detected by a very sensitive pressure sensor and is processed as a scaled flow rate signal. The DVZ Series vortex flowmeter has no moving parts and is thus very reliable. It is available with a Ryton body and your choice of either nickel-plated brass or 316 stainless steel fittings. The bluff body is available in either the standard Ryton or optional ceramic material, which has excellent long-term wear characteristics even under harsh operating conditions. Available outputs for the KOBOLD DVZ Series vortex flowmeter include pulse frequency, 4-20 mA, adjustable relay, and compact electronics with LED digital flow rate display, 4-20 mA output and adjustable transistor switch options.
Available Ranges: 0.13-1.2 through 2.7-26 GPM water
Max. Liquid Viscosity: 3 Centistoke
Accuracy: ± 2.5% of full scale
Repeatability: ± 1% of full scale
Straight Pipe Requirement: 10 X Diameter upstream and 2X downstream
Oper. Temp. Range: 32-176°F
Maximum Pressure
DVZ-1... & DVZ-2...: 145 PSIG
DVZ-3... & DVZ-4...: 290 PSIG
Max. Pressure Drop: 3.6 PSI at 100% rated flow
Wetted Parts
Sensor Housing: PPS
Sensing Diaphragm: PVDF
Bluff Body: PPS or ceramic depending on model code
Seals: NBR, EPDM, or FKM depending on model code
Fittings: Nickel plated brass or 316 SS depending on model code
Electrical Specifications
DVZ-...S300, S30D
Power Supply: 24 VDC ± 20%
Switching Output
DVZ-...S300: Relay change over, max.1A, 30 VDC
DVZ-...S30D: PNP 24 VDC, N/C, N/O
Electrical Connection: Micro-DC, 4-pin or 5-pin male
Electrical Protection: NEMA 4/IP 65
DVZ-...F300, F390
Power Supply: 24 VDC ± 20%
Output: PNP open collector, 200 mA Max.
Frequency at f.s.
DVZ-...F300: 500 Hz
DVZ-...F390: 50…1000 Hz (user specifi ed)
Electrical Connection: Micro-DC, 4-pin male
Electrical Protection: NEMA 4/IP 65
DVZ-...L343, L443
Power Supply: 24 VDC ± 20%
Output: 4-20 mA, 3-wire
Max. Load: 500 Ω
Electrical Connection:
L343: Micro-DC, 4-pin male
L443: DIN 43650 Plug
Electrical Protection: NEMA 4/IP 65
DVZ-...L443 with optional AUF-3000
Power Supply: 24 VDC ± 20%
Output: 4-20 mA, 3-wire
Max. Load: 250 Ω with AUF-3000
Electrical Connection: DIN 43650 Plug
Electrical Protection: NEMA 4/IP 65
DVZ-...C30R, C30M
Power Supply: 24 VDC ± 20%, 3- wire techn.
Output
C30M: 2-NPN open collector switches
C30R: 2-PNP open collector switches
Switch Ratings: 300 mA Max.
Programming: Switch setpoint, reset point, switching logic, dampening, lock out code via 2-button keypad
Power consumption: Approx. 100 mA
Electronic Connection: Micro-DC, 5-pin, male
Electronic Protection: NEMA 4/IP 65
DVZ-...C34P, C34N
Power Supply: 24 VDC ± 20%
Output
C34N: 4-20mA, 3-wire and 1-NPN open collector
C30P: 4-20mA, 3-wire and 1-PNP open collector
Switch Rating: 300 mA Max.
Programming: Switch setpoint, reset point, switching logic, 4-20 mA span and zero, dampening and lockout code via 2 button keypad
Electronic Connection: Micro-DC, 5-pin, male
Electronic Protection: NEMA 4/IP 65
DVZ-...E14R
Display: LCD, 2 x 8 digit, illuminated total, part and flow quantities, units selectable
Quantity Meter: 8-digit
Analog Output: 4-20 mA adjustable
Load: Max. 500 Ω
Switching Output: 2 relays, max. 250 V, 5 A, 1000 VA
Settings: Via 4 buttons
Functions: Reset, MIN/MAX memory, flow monitor, monitoring for part and total quantity, language
Power Supply: 24 VDC ±20 %, 3-wire
Power Consumption: Approx. 150 mA
Electrical Connection: Cable connection
DVZ-...G14R
Display: LCD, 2 x 8 digit, illuminated, batching-, total-, and fl ow quantity, units selectable
Quantity Meter: 8-digit
Batcher: 5-digit
Analog Output: 4-20 mA adjustable
Load: Max. 500 Ω
Switching Output: 2 relays, max. 250 V, 5 A, 1000 VA
Settings: Via 4 buttons
Functions: Batching (relay S2), start, stop, reset, fine batching, correction amount, flow switch, total quantity, language
Power Supply: 24 VDC ±20 %, 3-wire
Power Consumption: Approx. 150 mA
Electrical Connection: Cable connection
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