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Irrigation and hydraulic components

FLOWMETERS


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Flowmeters GR Flowmeters GR‌M and GR...P has been primarily designed for agricultural and industrial facilities in which you need a perfect knowledge of the flow rate at all times. Its design allows fluid flow or high flow rate through the construction of the joint geometry, which minimizes friction and friction losses.


The tube shaped display can be supplied in the following materials: Thermoplastic "Polycarbonate TTC" basic version (Gr. .. M). This material is characterized by providing a medium / high tolerance to chemicals or corrosive agents, coupled with a high resistance to mechanical traction, thus making this product particularly suitable for agricultural facilities by combining reliability and lower cost. Thermoplastic "polysufone Retilex" in its high-end version (Gr. .. P). This material has a high tolerance to chemicals or corrosives. Thanks to their high thermal threshold strain (liquids up to 90 ยบC) and UV sunlight protection, these units are especially suitable to measure equipment intended for agricultural facilities with high concentrations of circulating hot water, water recycling plants, water treatment plants, desalination and water treatment processes in general. The float or indicating bolt is made from AISI 316 or AISI 304 stainless steel (depending on the model). Its geometry is the outcome of a meticulous study that, as a result, can offer hydrodynamic behavior of excellent stability, in order to provide the unit with a high degree of precision.


The connectors or coupling elements are fabricated by high-pressure injection and molded in P.V.C. in order to offer high tolerance to chemical products. Their design allows the ensuing operations of cleaning or maintenance to be carried out easily, with no need to carry out modifications in the installation, since removable couplings that employ free-threaded connectors are included. Both the (GRA... M) model and the (GRA... P) model can be delivered with connectors, or couplings for gluing DN20, with ½" female thread, or with ½" male thread, depending on the model. The (GRA... M) and (GRA... P) flow meters cover a complete range of possibilities insofar as calibration ranges are concerned. Taking market demands as a reference, these units have been calibrated and separated into five basic scales of measurement:

20- 1/2”

20...120 L/h 30...300 L/h 50...500 L/h 75...750 L/h 250...1000 L/h

150…1200 L/h 25- 3/4”

900…2500 L/h 1000…3000

All of these units are released in the Market after successfully passing an exhaustive and meticulous automatic process of quality control that guarantees the correct operation of the unit.


b c Caudalimetro GR... (cotas exteriores) - 1/2”. 3/4”, 1”, 1-1/2”, 2” Rosca macho, rosca hembra, pegar.

d e

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GR... 1/2” encolar

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GR... 1/2” R/M GR... 1/2” R/M GR... 3/4” encolar GR... 3/4” R/M GR... 3/4” R/M GR... 1” encolar

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GR... 1” R/M

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GR... 1” R/M GR...1-1/2”encolar GR...1-1/2”R/M GR...1-1/2”R/M

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GR... 2” encolar GR... 2” R/M GR... 2” R/M

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a 184 218 184 230 263 230 276 313 276 327 367 327 383 437 365

b 27 15 27 36 17 36 42 19 42 59 21 59 74 27 74

c 20 1/2” 1/2” 25 3/4” 3/4” 32 1” 1” 50 1-1/2” 1-1/2” 63 2” 2”

d 10 13 10 11 13 11 15 17 15 20 20 20 24 24 14

e 20 20 20 22 22 22 26 26 26 33 33 33 38 38 38

f 123 123 123 162 162 162 191 191 191 224 224 224 259 259 259

g 105 105 105 140 140 140 170 170 170 200 200 200 240 240 240

Medidas de longitud y diametro expresadas en milìmetros. Medidas de roscas expresadas en pulgadas “gas”.

h 20 20 20 30 30 30 50 50 50 50 50 50 55 55 55

i 42 42 42 52 52 52 60 60 60 81 81 81 99 99 99

j 22 27 34 55 70 -

k 24 29 36 58 74 -


Example: We need to measure between 400 & 500 L/hour The recommended option is 75…750 L/hour We need to measure between 150 and 300 L/hour The recommended option is 50…500 L/hour You can use use this graph to choose the appropriate flowmeter  model.  If  you have any questions about the ideal choice, please contact our sales department.

POSSIBLE COMBINATIONS FOR THE “GRA” RANGE High reading Measure Family Thremoplastic injection flowmeter 1/2” 50... 500 L/H - 500

Raw Material VIEWFINDER GR A 500 MRM

Terminal Type 1/2” MALE TRADE Polycarbonate

GR A 500 MRM TEMPERATURE VS PRESSURE GRA…P (Polysulfona)

TEMPERATURE VS PRESSURE GR…M (Polycarbonato) 60

100

50

80

40

60

Cº 30

40

20

20

10

0

0 2

3

4

5

6

7

8

9

10

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BAR

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20... 120 L/H - 120 P-GLUING 30... 300 L/H - 300 RM - MALE TRADE 50... 500 L/H - 500 RH - FEMALE TRADE 75... 750 L/H - 750 250...1000 L/H - 1000 M - POLYCARBONATE “TTC” P - POLYSULFONE “RETILEX”

BAR

Specifications Metric body in polycarbonate or polysulfone (depends on the model) Stainless Steel Floats (AISI 316) Stainless steel guide shaft (AISI 316) Measurement scales 20...3000 L/ hour PVC Precision Fittings. O-rings in NBR or Viton depending on the model

PVC centralizers Maximum pressure 10 Bars Maximum temperature 52º/90º depending on the  model. Calibrated water 20 º Accuracy tolerance + / - 3% Vertical installation


Reference List FLOWMETERS POLYCARBONATE 1/2” GRA…M

Model

Range L/h

Float

Metric Body Rac.

Conexión

GRA120MP GRA120MRM GRA120MRH GRA300MP GRA300MRM GRA300MRH GRA500MP GRA500MRM GRA500MRH GRA750MP GRA750MRM GRA750MRH GRA1000MP GRA1000MRM GRA1000MRH

20…120 20…120 20…120 30…300 30…300 30…300 50…500 50…500 50…500 75…750 75…750 75…750 250…1000 250…1000 250…1000

AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316

Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate

Gluing20 MT 1/2” FT 1/2” Gluing20 MT 1/2” FT 1/2” Gluing20 MT 1/2” FT 1/2” Gluing20 MT 1/2” FT 1/2” Gluing20 MT 1/2” FT 1/2”

Float AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316

Metric Body Rac. Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone

Conection Gluing 20 MT 1/2” FT 1/2” Gluing20 MT 1/2” FT 1/2” Gluing20 MT 1/2” FT 1/2” Gluing20 MT 1/2” FT 1/2” Gluing20 MT 1/2” FT 1/2”

FLOWMETERS POLYSULFONE 1/2” GRA…P Model GRA120PP GRA120PRM GRA120PRH GRA300PP GRA300PRM GRA300PRH GRA500PP GRA500PRM GRA500PRH GRA750PP GRA750PRM GRA750PRH GRA1000PP GRA1000PRM GRA1000PRH

Range L/h 20…120 20…120 20…120 30…300 30…300 30…300 50…500 50…500 50…500 75…750 75…750 75…750 250…1000 250…1000 250…1000


FLOWMETERS POLYCARBONATE 3/4” GRB…M

Model

Range L/h

Float

Metric body Rac.

Conection

GRB1200MP GRB1200MRM GRB1200MRH GRB2500MP GRB2500MRM GRB2500MRH GRB3000MP GRB3000MRM GRB3000MRH

150…1200 150…1200 150…1200 900…2500 900…2500 900…2500 1000…3000 1000…3000 1000…3000

AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316

Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate Polycarbonate

Gluing25 MT 3/4” FT 3/4” Gluingr25 MT 3/4” FT 3/4” Gluing25 MT 3/4” FT 3/4”

FLOWMETERS POLYCARBONATE 3/4” GRB…P

Important

Model

Range L/h

Float

Metric body Rac.

Conection

GRB1200PP GRB1200PRM GRB1200PRH GRB2500PP GRB2500PRM GRB2500PRH GRB3000PP GRB3000PRM GRB3000PRH

150…1200 150…1200 150…1200 900…2500 900…2500 900…2500 1000…3000 1000…3000 1000…3000

AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316 AISI 316

Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone Polysulfone

Gluing25 MT 3/4” FT 3/4” Gluing25 MT 3/4” FT 3/4” Gluing25 MT 3/4” FT 3/4”

Install your flowmeter in a completely vertical position. Avoid vibrations in the installation. Use the appropriate model for the flow, temperature and fluid type See the table of chemical tolerance vs temperature and pressure. GALARZA cannot guarantee its flowmeters in cases where these indications are not respected.


Floats

Gravity

Gravity

20... 120

The float or indicating bolt of various models of GALARZA flowmeters  differ in shape and geometry, setting the flow rate at a different reference point for each model. The float or indicating bolt models GR…M and  GR...P  are  mechanized from  stainless materials  such as AISI 316 and AISI 304.

30... 300

Thrust of the fluid

Thrust of the fluid

Gravity

Gravity Balance Marking point Balance Marking point

75... 750

50... 500

Thrust of the fluid

Thrust of the fluid Gravity

Gravity

Thrust of the fluid

900... 2500

Thrust of the fluid

Gravity

Gravity

Balance Marking point

Balance Marking point

Balance Marking point

Balance Marking point

1000...3000

Balance Marking point

Balance Marking point

150...1200

Thrust of the fluid

250...1000

Thrust of the fluid


(VITON)

High tolerance (EPDM)

(INOX) Aisi 316

(INOX) Aisi 304

Polymethyl methacrylate (PMMA)

(PSF) Polysulfone

(PC) Polycarbonate

(PVC) Polyvinyl chloride

Chemical Tolerance Table

No tolerated Tolerance Media

Total tolerance

Potassium oxide Calcium oxide Nitric acid Phospphoric acid Phosphorus pentoxide Total nitrogen Nitric Nitrogen Ammonia nitrogen Urea nitrogen Manganese chelate Iron chelate Zinc chelate Detergents

This body is molded in polycarbonate metric in GR ... M  models and the GR…P model in Polysulfone ... P. The raw materials used to manufacture metric bodies  behave  differently depending on the ranges of temperature and pressure they have to operate in. Both models  GR ... M and GR... P are calibrated and tested at 20 ºC, and considering that the flowmeters are PN10, different graphs will emerge depending on the material. The graphs show an inversely proportional evolution, since  the higher the temperature of the fluid, the lower the pressure at which we work.  Check these reference graphs and ensure that the maximum parameters are not exceeded, since  we can not guarantee  the correct  functioning of the set, nor its physical integrity if it exceeds the parameters.

Oils Cholrinated hidrocarbons Concentrated oil Gasoline Acetone Alcohol Wine Salt solucions Water 0...14

4...10

0...14

5...9

4...10

0...14

4...10

0...14

PH tolerance

When you are choosing the flowmeter model you may need,  try to choose the scale model that suits your flow measurement needs. Ideally, you should use one in which the flow to be measured is in the middle of the scale.


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Irrigation and hydraulic components

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Carretera de loeches 89 28850 Torrejon de Ardoz Madrid - España


Galarza caudalimetros