Oval gear flow meter RIZUR-DOM

Oval gear flow meters RIZUR-DOM are used primarily for the control of the viscous medium. Positive-displacement flow meters are a device for efficient and exact measurement of the flow of liquids with high viscosity (up to 1 mln cP).

ТU 26.51.52-001-12189681-2018
Conformity certificate № EAЭС RU C-RU.HA91.B.00029/19

   Oval gear flow meters RIZUR-DOM are used primarily for the control of the viscous medium. Positive-displacement flow meters are a device for efficient and exact measurement of the flow of liquids with high viscosity (up to 1 mln cP).

   With this technology there's no need for the flow control or the straight parts of the pipeline rule (which is compulsory for the operation of the majority of other flow meters). As a result, RIZUR-DOM is a compact and efficient solution on flow meter of almost any clean media.

   Temperature drops in some types of media, e.g. oils, can cause the change in viscosity. In such cases, volumetric measurement principle along with the Coriolis one provide most accurate results for flow measurement.

   RIZUR-DOM is designed for the measurement of volume flow rate of clean liquids that are under pressure (up to 400 bars) or are moving under their own weight, regardless of their viscosity and conductivity - petroleum, diesel, kerosene, animal and vegetable oils, natural or synthetic oils, chemicals, additives, paints, glue, emulsions, solvents, etc.
Flow meters RIZUR-DOM are used in petrochemical, chemical, pharmaceutical, food and fuel and energy branches of the industry.

Design description and functions

Oval gear flow meters RIZUR-DOM are positive-displacement flow meters. They have two oval gears inside. The spaces between the gears and the frame are called chambers. The oval gears start moving under the influence of the liquid flow, driving the liquid through the flow meter with each turn.
Each full turn (360°) of the oval gear is equal to some amount of liquid. When the flow changes, so does the number of turns.
Since the amount of liquid passing through the flow meter is always the same, regardless of the flow speed, then the total discharge can be calculated by simply counting the number of gear turns. For that purpose, there're magnets on the gears themselves that produces a series of high-resolution impulses. The flow meter can be supplied with an impulse output, as well as with a secondary transducer (compact or separable design version), with an analogue output 4-20mA,HART or others. On request, flow meter can be supplied with a mechanical or electronic adder.

Application areas

This device is designed for viscous, non-abrasive, clean liquids, such as:

  • oil
  • lubricants 
  • glue
  • petrochemicals
  • chemicals 
  • fuel
  • water
  • ink
  • etc. 

Flow meters made from stainless steel are best used for the majority of water solutions and chemicals, while aluminium variants are best used for fuel, oil products and liquid lubricants.

Dimensions DOM-R-A(S)...

RIZUR-DOM-X05.... RIZUR-DOM-x15 RIZUR-DOM-H05.... DOM-R-H20
DOM-R-X05.... DOM-R-x15 DOM-R-H05.... DOM-R-H20
RIZUR-DOM-X20....RIZUR-DOM-R-X40 RIZUR-DOM-H25 .... RIZUR-DOM-R-H35
DOM-R-X20.... DOM-R-X40 DOM-R-H25 .... DOM-R-H35
RIZUR-DOM-X45.... RIZUR-DOM-R-х60  
DOM-R-X45.... DOM-R-х60  

Dimensions RIZUR-DOM-A(S)[H]... (± 2 mm)

Model А (mm) B(mm) С (mm)
Thread connection Flange connection Lid Z1 Z3,B1 Z5

M1

МЗ

Lid Z1 Z3,B1 Z5
RIZUR-DOM-X05 -[68] - 92
[90]
113
[113]
122
[121]
125
[125]
- 72
[74]
94
[94]
124
[124]
96
[96]
RIZUR-DOM-X10 -[68] - 92
[90]
113
[113]
122
[121]
125
[125]
- 72
[74]
94
[94]
124
[124]
96
[96]
RIZUR-DOM-X15 -[95] - 99
[117]
120
[140]
129
[148]
132
[152]
- 72
[100]
94
[100]
124
[124]
96
[100]
RIZUR-DOM-X20 110
[112]
- 106
[122]
145
[145]
154
[153]
157
[157]
178 [120] [120] [124] [120]
RIZUR-DOM-X25 137
(176)
[152]
198
(237)
120
[141]
160
[164]
168
[172]
172
[176]
188 [120] [120] [120] [120]
RIZUR-DOM-X30 188
[234]
252 155
[165]
195
[188]
203
[196]
207
[200]
227 [160] [160] [160] [160]
RIZUR-DOM-X35 212 274*
(277)
170
[187]
210
[210]
218
[218]
222
[222]
237 [180] [180] [180] [180]
RIZUR-DOM-X40 212 274* 220 260 268 271 286 - - - -
RIZUR-DOM-X45 266 354 213
(206)
252
(249)
260
(257)
264
(260)
270 - - - -
RIZUR-DOM-X50 294 382 229 269 277 281 288 - - - -
RIZUR-DOM-X55 294 388 274 314 322 326 333 - - - -
RIZUR-DOM-X60 320 414 352 391 399 403 415 - - - -

Attention: the dimensions of RIZUR-DOM-D-4S/5S are the same as of RIZUR-DOM-A-45/55, the dimensions of RIZUR-DOM-S… are specified in the 0 only in case they’re different from RIZUR-DOM-A, the dimensions of RIZUR-DOM-H are specified in [ ].

* DIN flange dimensions, 272mm for flanges acc. to ANSI 

Dimensions RIZUR-DOM-A25...RIZUR-DOM-A40 with "A" option

RizurDom1.PNG

Dimensions RIZUR-DOM-R-A45...RIZUR-DOM-R-A60 with "A" option

RizurDom2.PNG

Dimensions RIZUR-DOM-A... with "A" option (± 2 mm)

Model

Thread connection (G or NРТ)

Flange connection (DIN PN16 and ANSI150RF)

А

В

С

D

А

В

С

D

RIZUR-DOM-A25

298

338

270

151

360

368

300

213

RIZUR-DOM-A30

288

400

291

141

360

432

363

213

RIZUR-DOM-A35

300

429

353

141

360*

459*

383*

213*

RIZUR-DOM-A40

300

429

353

141

360*

459*

383*

213*

RIZUR-DOM-A45

326

507

439

161

421

578

483

265

RIZUR-DOM-A50

326

535

467

161

421

606

511

265

RIZUR-DOM-A55

439

586

499

219

540

660

546

329

RIZUR-DOM-A60

439

612

525

219

540

686

572

329


Подробнее Скрыть
Measuring range, l/h 0,5 ... 150000
Nominal pressure, bar up to 400
Medium viscosity, centipoise up to 1000
Process temperature, °С up to +120
Accuracy, % 0,2 ... 1 of the measured medium
Output signal impulse; analogue 4-20mА; HART (other types on request)
Housing and gear wheels material cast iron; aluminium; stainless steel
Process connection thread, flange
Ambient temperature, °С -40 ... +60 (-70 ... +60 with a soft enclosure)
Power supply without power supply; 8... 24V DC; batteries
Explosion protection marking 0ExiaIIBT4X, 1ExdIIBT4X, 1ExdIIBT4X

In accordance with the metrological requirements, impeller flow meter RIZUR-DOM is a device for technical control.

Peak flow intensifier

(for liquids with high viscosity)

Viscosity(cP) Standard rotor Special carved rotor
≤1000 1 1
≤2000 0.5 1
≤4000 0.42 0.84
≤6000 0.33 0.66
≤8000 0.25 0.5
≤30000 0.15 0.3
≤60000 0.12 0.25
≤150000 0.1 0.2
≤250000 0.05 0.1
≤1000000 0.025 0.05 

Impulse signal resolution

Model Measuring range (l/h) Pulse/liter
Reed switch Hall sensor Square Hall sensor
RIZUR-DOM-X05 0.5-36 л/ч 2890 2890 2890
RIZUR-DOM-X10 2-100 л/ч 1050 1050 1050
RIZUR-DOM-X55 15- 550 л/ч 355 710 710
RIZUR-DOM-X20 1-40 83 166 166
RIZUR-DOM-X25 10-50 27 107 53.5
RIZUR-DOM-X30 15-250 13 52.6 26.3
RIZUR-DOM-X35 30-450 6.3 26 13
RIZUR-DOM-X40 50-580 4.93 19.73 9.86
RIZUR-DOM-X45 35-750 2.32 9.3 4.65
RIZUR-DOM-X50 50-1000 1.55 6.2 3.1
RIZUR-DOM-X55 75-1500 1.1 4.4 2.2
RIZUR-DOM-X65 150-2500 0.56 2.24 1.12

Special carved rotors for liquids with high viscosity.

Special carved rotors (option"S") are designed for decreasing the pressure difference when working with liquids with viscosity of > 1000 cP. This applies to DOM-R-x15 and bigger-sized variants. Application of special carved rotors when working with liquids with a higher viscosity decreases liquid flow (see the table). Example: DOM-R-X25 - when measuring oil with viscosity 6000 cP, the maximum flow is 150l/h x 0.5 = 75 l/min



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