Page 102 - Catalogo de Boquillas - Industrysystem
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neering. Engineering. Engineering. Engineering. Engineeri
Engineering Information
SPECIFYING SPRAY NOZZLES
Spray nozzles have three basic
functions:
3m
meter flow
distribute liquid Nozzle:
break up a liquid stream
into droplets (1) 2 1/2 MP1250M
The process of choosing a nozzle DN65
includes specifying: 2 1/2
12 m = height
a.) its flowrateversuspressure
characteristics (see catalog flow
rate tables)
b.) how the droplets will be distri
buted after leaving the nozzle
(see spray pattern, pp. 2, 3) Calculate Total Water Flow and Pressure at Pump
c.) the size of the droplets that will for Nozzles Operating at 0.5 bar
be produced (contact BETE Total Flow (p. 26, 27) = (1 nozzles)(381 l/min/nozzle) = 381 l/min
Applications Engineering if Pump Pressure Formula:
P = P + P + gh/100000
droplet size is critical) pump nozzle pipe losses
d.) the nozzle connection to the Calculate Pipe Loss:
Pipe Friction: (15 m)(0.7 bar/100 m) = 0.11 bar
feed pipe (see dimension tables)
Fitting Loss: (3 elbows)(1.52 m/elbow) = 4.56 m
e.) the material of construction (see (4.56 m)(0.7 bar/100 m) = 0.03 bar
page 12 for complete list) Total Piping Losses: 0.11 bar + 0.03 bar = 0.14 bar
Elevation Losses: (1000)(9.81)(12 m) / 100000 = 1.17 bar
P = 0.5 bar + 0.14 bar + 1.17 bar = 1.81 bar
pump
Pump must be sized to provide 381 l/min at 1.81 bar
FLOW RATE
The volume of liquid flowing the gauge pressure inside the ves
through a nozzle depends primari sel from the gauge pressure at the FLUID PROPERTIES
(at room temperature)
ly on the difference in fluid pres nozzle inlet as shown:
sure upstream of its orifice and the l/min = K (Bar Inlet - Bar Vessel ) x Fluid Viscosity Specific Gravity
pressure into which the nozzle dis
Water 1cP SG=1
charges (normally that of the at
mosphere). Pressures that are list FLUID PROPERTIES 10W-30 Oil 110 cP SG=0.88
ed in the flow rate tables of each Specific gravity primarily affects
nozzle series are gauge pressures. nozzle flow. Flow rates of liquids Honey 1500 cP SG=1.05
Flow rates for pressures not tab denser than water are lower than
ulated may be calculated using the flow rates of water at the same Viscosity also affects nozzle
equation given at the bottom of pressure because more energy is performance. High viscosities
each table. The factor K is listed required to accelerate denser inhibit atomization. In general,
for each nozzle and has units of fluids. The following relationship fluids with viscosities greater than
x
lpm/bar . exists between flow rates (Q)of 100 cP are difficult to atomize
A nozzle may discharge into a fluids with different specific gravities: except with airatomizing nozzles.
vessel where the pressure is not
atmospheric. Since the nozzle flow
rate is determined by the differen
tial pressure across it, the flow rate
may be calculated by subtracting
120 www.BETE.com
Engineering Information
SPECIFYING SPRAY NOZZLES
Spray nozzles have three basic
functions:
3m
meter flow
distribute liquid Nozzle:
break up a liquid stream
into droplets (1) 2 1/2 MP1250M
The process of choosing a nozzle DN65
includes specifying: 2 1/2
12 m = height
a.) its flowrateversuspressure
characteristics (see catalog flow
rate tables)
b.) how the droplets will be distri
buted after leaving the nozzle
(see spray pattern, pp. 2, 3) Calculate Total Water Flow and Pressure at Pump
c.) the size of the droplets that will for Nozzles Operating at 0.5 bar
be produced (contact BETE Total Flow (p. 26, 27) = (1 nozzles)(381 l/min/nozzle) = 381 l/min
Applications Engineering if Pump Pressure Formula:
P = P + P + gh/100000
droplet size is critical) pump nozzle pipe losses
d.) the nozzle connection to the Calculate Pipe Loss:
Pipe Friction: (15 m)(0.7 bar/100 m) = 0.11 bar
feed pipe (see dimension tables)
Fitting Loss: (3 elbows)(1.52 m/elbow) = 4.56 m
e.) the material of construction (see (4.56 m)(0.7 bar/100 m) = 0.03 bar
page 12 for complete list) Total Piping Losses: 0.11 bar + 0.03 bar = 0.14 bar
Elevation Losses: (1000)(9.81)(12 m) / 100000 = 1.17 bar
P = 0.5 bar + 0.14 bar + 1.17 bar = 1.81 bar
pump
Pump must be sized to provide 381 l/min at 1.81 bar
FLOW RATE
The volume of liquid flowing the gauge pressure inside the ves
through a nozzle depends primari sel from the gauge pressure at the FLUID PROPERTIES
(at room temperature)
ly on the difference in fluid pres nozzle inlet as shown:
sure upstream of its orifice and the l/min = K (Bar Inlet - Bar Vessel ) x Fluid Viscosity Specific Gravity
pressure into which the nozzle dis
Water 1cP SG=1
charges (normally that of the at
mosphere). Pressures that are list FLUID PROPERTIES 10W-30 Oil 110 cP SG=0.88
ed in the flow rate tables of each Specific gravity primarily affects
nozzle series are gauge pressures. nozzle flow. Flow rates of liquids Honey 1500 cP SG=1.05
Flow rates for pressures not tab denser than water are lower than
ulated may be calculated using the flow rates of water at the same Viscosity also affects nozzle
equation given at the bottom of pressure because more energy is performance. High viscosities
each table. The factor K is listed required to accelerate denser inhibit atomization. In general,
for each nozzle and has units of fluids. The following relationship fluids with viscosities greater than
x
lpm/bar . exists between flow rates (Q)of 100 cP are difficult to atomize
A nozzle may discharge into a fluids with different specific gravities: except with airatomizing nozzles.
vessel where the pressure is not
atmospheric. Since the nozzle flow
rate is determined by the differen
tial pressure across it, the flow rate
may be calculated by subtracting
120 www.BETE.com
