SMC Networks VXS23 Installation And Maintenance Manual

VXSS-TFR48
Installation and Maintenance Manual
VXS Zero Pressure Differential Type
Pilot operated 2 port solenoid valve
For Steam and Heated water
1 Safety Instructions
This manual contains essential information for the protection of users and
others from possible injury and/or equipment damage.
• Read this manual before using the product, to ensure correct handling,
and read the manuals of related apparatus before use.
• Keep this manual in a safe place for future reference.
• These instructions indicate the level of potential hazard by label of
"Caution", "Warning" or "Danger", followed by important safety
information which must be carefully followed.
• To ensure safety of personnel and equipment the safety instructions in
this manual and the product catalogue must be observed, along with
other relevant safety practices.
Indicates a hazard with a low level of risk, which if not
Caution
avoided, could result in minor or moderate injury.
Indicates a hazard with a medium level of risk, which
Warning
if not avoided, could result in death or serious injury.
Indicates a hazard with a high level of risk, which if
Danger
not avoided, will result in death or serious injury.
Warning
• The compatibility of equipment is the responsibility of the person
who designs the system or decides its specifications.
Since the products specified here can be used in various operating
conditions, their compatibility with a specific system must be based on
specifications or after analysis and/or tests to meet
requirements.
• Only trained personnel should operate pneumatically operated
machinery and equipment.
The fluid can be dangerous if an operator is unfamiliar with it. Assembly,
handling or repair of the system should be performed by trained and
experienced personnel.
• Do not service machinery/equipment or attempt to remove
components until safety is confirmed.
1) Inspection and maintenance of machinery/equipment should only be
performed after confirmation of safe locked-out control positions.
Measures to prevent danger from the fluid should also be taken.
2) When equipment is to be removed, confirm the safety processes as
mentioned above. Release the fluid pressure and be certain there is no
danger from fluid leakage or fluid remaining in the system. Switch off
electrical supplies.
3) Before machinery/equipment is re-started, ensure all safety measures
are being implemented.
• Do not use this product outside of the specifications. Contact SMC
if it is to be used in any of the following conditions:
1) Conditions and environments beyond the given specifications, or if the
product is to be used outdoors.
2) Installations in conjunction with atomic energy, railway, air navigation,
vehicles, medical equipment, food and beverage, recreation equipment,
emergency stop circuits, press applications, or safety equipment.
3) An application which has the possibility of having negative effects on
people, property, or animals, requiring special safety analysis.
Caution
• Ensure that the air supply system is filtered to 5 m.
2 Specifications
2.1 General Specifications
Zero differential pressure pilot operated 2
Valve construction
Withstand pressure (with
water)
Maximum system pressure
Maximum operating
pressure differential
Minimum operating
pressure differential
Body material Brass (C37), Stainless steel
(Note 3)
Seal material
Enclosure Dust-tight, Water jet-proof type (IP65)
Location without corrosive or explosive
Environment
100 VAC, 200VAC, 110VAC, 230VAC,
AC
(220VAC, 240VAC, 48VAC, 24VAC)
Rated voltage
DC
Allowable voltage fluctuation ±10% of rated voltage
AC 5% or less of rated voltage
Allowable leakage
voltage
DC 2% or less of rated voltage
Coil insulation type
Note 1) The operation of the valve may be unstable due to the capacity of the
pressure supply source such as pumps and compressors or the pressure loss by the
orifice of piping. Please contact SMC to check if the required valve size can be used
in the application. Contact SMC for the compatibility of the circuit and valve size.
Note 2) Voltage in brackets ( ) indicates special voltage.
2.2 Coil Specifications
2.2.1 Normally Closed (N.C.)
DC Specification
Note1)
Model Power consumption (W) Temperature rise (°C)
12
VXS23/24
15
VXS25/26
Note 1: Power consumption: The value at ambient temperature of 20°C and when the
rated voltage is applied. (Variation: ±10%).
Note 2: The value at ambient temperature of 20°C and when the rated voltage is
specific
applied. The value depends on the ambient environment. This is for reference.
2.2.2 Normally Closed (N.C.)
AC Specification (Built-in Full-wave Rectifier Type)
Note 1, 2)
Model Apparent power (VA) Temperature rise (°C)
12
VXS23/24
15
VXS25/26
Note 1: Power consumption, apparent power: The value at ambient temperature of
20°C and when the rated voltage is applied. (Variation: ±10%)
Note 2: There is no difference in the frequency and the inrush and energized apparent
power, since a rectifying circuit is used for AC. (Built-in full-wave rectifier type).
Note 3: The value at ambient temperature of 20°C and when the rated voltage is
applied. The value depends on the ambient environment. This is for reference.
2.3 Model/Valve specifications
For STEAM / Single Unit (Can be used with heated water)
Normally closed (N.C.)
C37, Stainless steel body
Flow characteristics
Orifice
Port
Size Dia. Model
Size
Av
(mm)
-6 2
(x 10 m
1/4 58
3 10 VXS235
3/8 67
4 1/2 15 130
VXS245
5 3/4 20 VXS255 220
6 1 25 290
VXS265
Note) Weight of Grommet type. Add 10g for Conduit type, 30g for DIN terminal, 60g
for Conduit terminal type.
Ambient and fluid temperature
Fluid Temperature (°C)
Steam 183 or less
Heated water 99 or less
Note) With no freezing.
2 Specifications (continued)
Valve Internal Leakage Rate
Fluid Seal Material
port piston type
Steam
2.0 MPa
Heated water
Valve External Leakage Rate
1.0 MPa
Fluid Seal Material
1.0 MPa
Steam
Note 1)
0 MPa
Heated water
Note) Leakage is the value at ambient temperature 20°C.
FKM
2.4 Pneumatic Symbol
gases
2.4.1 Valve
Valve
Note 2)
24 VDC
Normally closed (N.C.)
Class H
Note2)
100
100
3 Installation
• Do not install the product unless the safety instructions have been read
Note 3) and understood.
100
3.1 VXS Valve Mounting Bracket
100
C37, Stainless steel (Bracket optional)
Note)
Weight
(g)
Cv
)
2.4
600
2.8
5.3 720
Port
A
9.2 1100
Model size
(mm)
12.0 1300
P
VXS23 1/4, 3/8 10.5
VXS24 1/2 14
VXS25 3/4 17
VXS26 1 20
Ambient temperature (°C)
-20 to 60
3 Installation (continued)
3.2 Environment
Note)
Leakage rate
3
1 cm /min or less
• Do not use in an environment where corrosive gases, chemicals, salt
FKM
3
0.1 cm /min or less
water, water, water vapour are present or where there is direct contact
with any of these.
Note)
Leakage rate
• Do not use in an explosive atmosphere.
3
1 cm /min or less
• Do not expose to direct sunlight. Use a suitable protective cover.
FKM
3
0.1 cm /min or less
• Do not install in a location subject to vibration or impact. Check the
product specifications.
• Do not mount in a location exposed to radiant heat.
• Employ suitable protective measures in locations where there is contact
with water droplets, oil or welding splatter, etc.
Symbol 3.3 Piping
• Before connecting piping, it should be thoroughly blown out with air
(flushed) or washed to remove chips, cutting oil and other debris from
inside the pipe.
• Avoid connecting ground lines to piping, as this may cause electrolytic
Table 1
corrosion of the system.
• When installing piping or fittings, ensure sealant material does not enter
inside the port. When using seal tape, leave 1.5 to 2 threads exposed on
the end of the pipe/fitting.
• Tighten fittings to the specified tightening torque, see Table 3.
• Install piping so that it does not apply pulling, pressing, bending or other
forces on the valve body.
• When connecting piping, avoid mistakes regarding the supply port.
• Steam generated by a boiler contains a large amount of drainage;
ensure to operate with a drain trap installed.
• Avoid installing piping to the valve at the lowest point of the layout. If
condensate accumulates in the valve or adjacent piping, this could
cause steam hammer. If steam hammer causes a problem, install a
bypass to discharge condensate from the piping.
• If the effective area of the piping on the fluid supply side is restricted, the
operating time may become unstable due to the differential pressure
Warning
fluctuation when the valve is closed.
Thread
Rc 1/4
Rc 3/8
Rc 1/2
Rc 3/4
Rc 1
3 Installation (continued)
3.3.1 Valve Ports
C37, Stainless steel
Figure 1
Bracket Mounting
(mm)
a b f i j H J
56 75 30 31 37 35 10
56 75 34 35 41 35 14
70.5 92 39 43 46 33 15.2
70.5 92 41 45 48 37 17.2
Table 2
Warning
Caution
Tightening Torque N•m
12 to 14
22 to 24
28 to 30
28 to 30
36 to 38
Table 3
Figure 2