SERIES
PRECIFLOW
PROPORTIONAL VALVES
• Preciflow solenoid valves are designed to proportionally control the flow of
air and inert gases by varying the electrical input signal to the coil
• Low hysteresis (<5%), excellent repeatability (<1%), and high sensitivity
(<0.1%) make these valves ideal for high precision flow control
• Compact frictionless architecture saves valuable space in analytical and
medical instrumentation
• Valves do not require a minimum operating pressure, and are well-suited for
vacuum operation
• Power consumption as low as 1W to meet the most stringent instrument
power requirements
• Meets all relevant CE directives, and are RoHS compliant
202
2
1
I
U
2/2 Normally Closed
• Typical Applications Include:
–– Gas Chromatography
–– Mass Flow Controllers
–– Dental Equipment
–– Blood Pressure Monitoring
Fluids*
Temperature Range
Seal Materials*
Air, Oxygen, Inert Gas1
0 °C to 55 °C
(32 °F to 131 °F)
FKM/FFKM
1 Filtration: 5µm
* Ensure that the compatibility of the fluids in contact with the materials is verified
Materials in Contact with Fluid*
Brass
Seals
FKM/FFKM
Others
Stainless Steel
Port 1
Flow
Body
* Other materials on request
Port 2
Input Signal
Electrical Characteristics
Coil Insulation Class
F
Connector
Lead Wires 24 AWG; L = 500mm
Electrical Safety
Voltage
Max.
Operating
Current
V
mA
IEC 335
Electrical Enclosure Protection
Standard Voltages
IP50
6
6 VDC, 12 VDC, 24 VDC
Voltage Regulation
Flow Regulation Characteristics
0-6 VDC, 0-12 VDC, 0-24 VDC
Pulse-width Modulation (>1000Hz)
12
Hysteresis typ. 5%; Repeatability typ.
1%; Sensitivity typ. 0.1%
24
Power Ratings
Inrush
~
VA
Holding
~
VA
W
Hot/Cold
=
W
170
1
420
2.5
85
-
210
-
-
Ambient
Temperature
Ranges
1
2.5
45
1
110
2.5
ºC (ºF)
0 to 55
(32 to 131)
Specifications
Orifice Size
Flow Coefficient
Pressure Differential bar (psi)
Power Coil (W)
Catalog Number
mm (inches)
Kv (m3/h)
Cv
min.
max.
=
pad mount version
0.045 (0.0018)
0.00006
0.00007
-0.9 (-13)
10 (145)
1
R202A540L0XXXXX
0.07 (0.0023)
0.00012
0.00014
-0.9 (-13)
10 (145)
1
R202A541L0XXXXX
0.1 (0.0040)
0.0003
0.00035
-0.9 (-13)
10 (145)
1
R202A542L0XXXXX
0.2 (0.0079)
0.0012
0.00139
-0.9 (-13)
10 (145)
1
R202A543L0XXXXX
0.4 (0.0157)
0.0048
0.0055
-0.9 (-13)
10 (145)
2.5
R202A544L0XXXXX
0.6 (0.0236)
0.0096
0.0111
-0.9 (-13)
10 (145)
2.5
R202A545L0XXXXX
0.8 (0.0315)
0.018
0.0208
-0.9 (-13)
10 (145)
2.5
R202A546L0XXXXX
Information subject to change without notice. For ordering information or regarding your local sales office visit www.ASCO.com.
1
SERIES
202
How to Order
R202A540 L0
XXX XX
Catalog Number
(see table "Specifications")
Voltage
E7 = 6 VDC
F3 = 12 VDC
F1 = 24 VDC
Connector
Seal Materials
V00= FKM
100= FFKM
Ordering Example: R202A542L0V00F1 = 2-way NC (normally closed), orifice size
0.1mm, with lead wires L=500mm, FKM seal, 24 VDC
Dimensions: mm (inches)
Dimensional Drawing
15.5 (0.61)
12.7 (0.50)
Port 1
Z
17.1 (0.67)
4.5
(0.18)
7.14 (0.28)
15 (0.59)
10.32 (0.41) REF
6.86 (0.27)
3.18
(0.12)
45 (1.77)
2 (0.08)
3.2 (0.126) 2x
3 (0.118) 2x
3.96
(0.16) REF
7.92 (0.31)
12.7 (0.50)
13.5 (0.53)
17.5 (0.69)
18.3 (0.72)
DIN 912 - M3
2x
Port 2
max. 13.5 (0.53)
Z
5:1
Mounting Pattern
24 AWG
500 (19.7)
Sealing
(optional)
Mounting Face (Proposal)
2.5 (0.098) 2x
0
0
5.9 (0.23) -0.1
0.8 (0.03) -0.05
2x
M3 6
2x
4 (0.157)
A
1 (0.039)
A-A
A
9 (0.354)
Options
• Digital control module Control D for DIN EN 50022 rail mounting
Installation
• The solenoid valves can be mounted in any
position without affecting operation
–– Used as a current regulator in open loop applications
–– Used with an external sensor for closed-loop applications
• Other materials and voltages available on request
• Sealing FFKM: 514684-002, FKM: 514684-001 (minimum order quantity required)
• Sub-Base with M5 connections and O-ring seals available on request
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Information subject to change without notice. For ordering information or regarding your local sales office visit www.ASCO.com.