6-9-p0027-0080-vx21_en.pdf - 第51页

VX21 VX22 VX23 0.5 0.7 Proper Tightening Torque (N·m) Metal body ( Aluminum C37 Stainless steel ) Resin body Mounting screw Coil assembly O-ring A O-ring B Adapter Push rod assembly Spring O-ring C Mounting screw Coil as…

Mounting

Warning

Selection

AC coil: 5% or less of rated voltage

DC coil: 2% or less of rated voltage

Caution

1. Leakage voltage

When the solenoid valve is operated using the controller, etc.,

the leakage voltage should be the product allowable leakage

voltage or less. Particularly when using a resistor in parallel

with a switching element and using a C-R element (surge

voltage suppressor) to protect the switching element, take note

that leakage current will flow through the resistor, C-R element,

etc., creating a possible danger that the valve may not turn off.

2. Selecting model

Material depends on fluid. Select optimal models for the fluid.

3. When the fluid is oil.

The kinematic viscosity must not exceed 50 mm

/s.

1. If air leakage increases or equipment does not

operate properly, stop operation.

After mounting is completed, confirm that it has been done

correctly by performing a suitable function test.

2. Do not apply external force to the coil section.

When tightening is performed, apply a wrench or other tool to

the outside of the piping connection parts.

3. Mount a valve with its coil position upward, not

downward.

When mounting a valve with its coil positioned downward,

foreign objects in the fluid will adhere to the iron core leading

to a malfunction. Especially for strict leakage control, such as

with vacuum applications and non-leak specifications, the coil

must be positioned upward.

4. Do not warm the coil assembly with a heat insulator

etc.

Use tape, heaters, etc., for freeze prevention on the piping and

body only. They can cause the coil to burn out.

5. Low temperature operation

1) The valve can be used in an ambient temperature of between

–20 to –10°C. However, take measures to prevent freezing or

solidification of impurities, etc.

2) When using valves for water application in cold climates, take

appropriate countermeasures to prevent the water from

freezing in tubing after cutting the water supply from the

pump, by draining the water etc. When warming by a heater

etc., be careful not to expose the coil portion to a heater.

Installation of a dryer, heat retaining of the body is recom-

mended to prevent a freezing condition in which the dew

point temperature is high and the ambient temperature is low,

and the high flow runs.

Warning

SOL.

OFF

Switching element

Power supply

Leakage voltage

Leakage current

Selection

Warning

<Water>

Be aware that rust stains, chloride separation, etc., from the piping may

cause malfunction, leakage, or, in worse case scenarios, damage due

to corrosion. Also, such damage may result in the spraying of fluids or

scattering of parts. Please be sure to have protective measures in place

in case such incidents should occur.

The use of a fluid that contains foreign objects can cause problems

such as malfunction and seal failure by promoting wear of the valve

seat and armature and by sticking to the sliding parts of the

armature etc. Install a suitable filter (strainer) immediately upstream

from the valve. As a general rule, use 100 mesh.

The supply water includes materials that create a hard sediment or

sludge such as calcium and magnesium. Since this scale and

sludge can cause the valve to malfunction, install water softening

equipment, and a filter (strainer) directly upstream from the valve to

remove these substances.

Tap water pressure:

The water pressure for tap water is normally 0.4 MPa or less. How-

ever, in places like a high-rise building, the pressure may be 1.0 MPa.

When selecting tap water, be careful of the maximum operating pres-

sure differential.

When using water or heated water, poor operation or leaks

may be caused by dezincification, erosion, corrosion, etc. We

offer a stainless steel body type with improved corrosion

resistance. Please use the one that fits your needs.

<Oil>

Generally, FKM is used as seal material, as it is resistant to

oil. The resistance of the seal material may deteriorate

depending on the type of oil, manufacturer or additives.

Check the resistance before using. The kinematic viscosity

must not exceed 50 mm

/s.

<Steam>

The use of a steam that contains foreign objects can cause

problems such as malfunction and seal failure by promoting wear of

the valve seat and armature, and by sticking to the sliding parts of

the armature etc. Install a suitable filter (strainer) immediately

upstream from the valve.

As a standard, the mesh count for the strainer is 100 mesh.

However, the size and shape of foreign objects that occur depends

on the operating environment. Check the fluid status and choose an

appropriate mesh count.

The supply water to a boiler includes materials that create a hard

sediment or sludge such as calcium and magnesium.

Sediment and sludge from steam can cause the valve to not operate

properly. Install a water softening device, which removes these

materials. Do not use operation steam which contains chemicals,

synthetic oils containing organic solvents, salts or corrosive gases,

etc., as these can cause damage or deterioration.

The seal material (special FKM) used for wetted parts of the product

can withstand steam in standard conditions.

However, the resistance of the sealing material can deteriorate

depending on the types of additives such as boiler compounds and

water conditioners within the boiler steam. Please only utilize the

product after determining the sealing material resistance within the

actual usage conditions.

3. Ambient environment

Use within the operable ambient temperature range. Check

the compatibility between the product’s composition materials

and the ambient atmosphere. Be certain that the fluid used

does not touch the external surface of the product.

4. Countermeasures against static electricity

Take measures to prevent static electricity since some fluids

can cause static electricity.

VX21/22/23 Series

Specific Product Precautions 2

Be sure to read this before handling the products.

Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid

Valve for Fluid Control Precautions.

VX21

VX22

VX23

0.5

0.7

Proper Tightening Torque

(N·m)

Metal body (

Aluminum

C37

Stainless steel

)

Resin body

Mounting screw

Coil assembly

O-ring A

O-ring B

Adapter

Push rod assembly

Spring

O-ring C

Mounting screw

Coil assembly

Seal

Return spring

Armature assembly

Body

Bracket

No gaps

Mounting Disassembly/Assembly Procedures

Warning Caution

Secure with brackets, except in the case of steel piping

and copper fittings.

Avoid sources of vibration, or adjust the arm from the body

to the minimum length so that resonance will not occur.

7. Painting and coating

Warnings or specifications printed or labeled on the product

should not be erased, removed or covered up.

Caution

1. Before starting the disassembly work, be sure to

shut off the power supply and pressure supply, and

then release the residual pressure.

<N.C.>

1) Loosen the mounting screws.

The coil assembly, seal, return spring, armature assembly and

body can be removed.

<N.O.>

1) Loosen the mounting screws.

The coil assembly, push rod assembly, O-rings, adapter and

body can be removed.

Disassembly

1) Mount the components on the body in the reverse order of

disassembly.

2) When changing the electrical entry direction, turn the coil

assembly in a desired direction to mount it.

Push the coil assembly against the body and tighten the screws

two or more rounds diagonally (Fig. 2) in the status that there

are no gaps between the coil assembly and body (Fig. 1).

Tighten the screws in the order of “12341234”.

∗ After tightening the screws, make sure that there are no gaps between the

coil and body (Fig. 1).

∗ After the disassembly and assembly have been completed, make sure

that no leak occurs from the seal. Additionally, when restarting the valve,

make sure that the valve operates correctly after checking the safety.

Assembly

Fig.2Fig.1

<N.C.> <N.O.>

Disassembly/Assembly Procedures

VX21/22/23 Series

Specific Product Precautions 3

Be sure to read this before handling the products.

Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid

Valve for Fluid Control Precautions.

VX2

VXK

VXD

VXZ

VXS

VXB

VXE

VXP

VXR

VXH

VXF

VX3

VXA

VX2

Disassembly/Assembly Procedures

Caution

Piping

Warning

Caution

1. During use, deterioration of the tube or damage to

the fittings could cause tubes to come loose from

their fittings and thrash about.

To prevent uncontrolled tube movement, install protective

covers or fasten tubes securely in place.

2. For piping the tube, fix the product securely using the

mounting holes so that the product is not in the air.

1. Preparation before piping

Before piping is connected, it should be thoroughly blown out

with air (flushing) or washed to remove chips, cutting oil and

other debris from inside the pipe. Avoid pulling, compressing, or

bending the valve body when piping.

2. Avoid connecting ground lines to piping, as this may

cause electric corrosion of the system.

3. Always tighten threads with the proper tightening

torque.

When using steel piping, tighten with the proper tightening

torque shown below.

Lower tightening torque will lead into fluid leakage.

4. Connection of piping to products

When connecting piping to a product, avoid mistakes regarding

the supply port etc.

5. Winding of sealant tape

When connecting pipes, fittings,

etc., be sure that chips from the

pipe threads and sealing material

do not enter the valve.

Furthermore, when sealant tape is

used, leave 1.5 to 2 thread ridges

exposed at the end of the threads.

6. In applications such as vacuum and non-leak speci-

fications, use caution specifically against the

contamination of foreign objects or airtightness of

the fittings.

Tightening Torque for Piping

Thread size

Rc1/8

Rc1/4

Rc3/8

Rc1/2

7 to 9

12 to 14

22 to 24

28 to 30

Proper tightening torque (N·m)

Individual SUP

for medium vacuum

Common SUP

for air

Manifold Exploded View

IN port (Common SUP)

OUT port (Individual SUP)

IN port

Gasket

IN port

Solenoid valve for manifold

Gasket

Mounting screw

OUT port (Common SUP)

IN port (Individual SUP)

Individual port sideIndividual port side

∗ Mounting orientation exists when mounting valves onto manifold base.

Mount it as shown above.

∗ Take great care when special electrical entry direction (XC) is used.

Individual port

Solenoid valve

interface for

manifold

Manifold base

VX21/22/23 Series

Specific Product Precautions 4

Be sure to read this before handling the products.

Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid

Valve for Fluid Control Precautions.

Winding

direction

Sealant tape

Expose approx.

2 threads