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Water Hammer Relief, Pilot Operated 2 Port Solenoid Valve VXR21/22/23 Series (Part Numbers)
SMC Solenoid Valve.
[Features]
· Water hammer is alleviated.
· Easy to disassemble and reassemble in a short time.
(i)Caution
- Product images may be representative images. Refer to the catalog for details.
Water Hammer Relief, Pilot Operated 2 Port Solenoid Valve VXR21/VXR22/VXR23 Series, For Water/Oil, Normally Closed (N.C.) Specifications
Normally closed (N.C.) external appearance
Normally closed (N.C.) display symbol
*When the valve is closed IN and OUT are blocked, but the fluid cannot be blocked when the pressure at port 2 exceeds the pressure at port 1.
Model / Valve Specifications (Normally Open)
| Connection | Orifice Diameter mm ø | Model | Minimum Operating Pressure Differential *2 MPa | Maximum Operating Pressure Differential *2 MPa | Flow Rate Characteristics | Maximum System Pressure *2 MPa | Weight *1 g | ||
|---|---|---|---|---|---|---|---|---|---|
| Thread | Water | Oil | Water/Oil | ||||||
| Kv | Conversion Cv | ||||||||
| 1/2 | 20 | VXR2150-04 | 0.04 | 1.0 | 0.7 | 5.7 | 6.5 | 1.5 | 1,250 |
| 3/4 | 20 | VXR2150-06 | 6.4 | 7.5 | 1,250 | ||||
| 1 | 25 | VXR2260-10 | 10.3 | 12 | 1,730 | ||||
| 1 1/4 | 35 | VXR2270-12 | 18.9 | 22 | 2,900 | ||||
| 1 1/2 | 40 | VXR2380-14 | 25.7 | 30 | 3,700 | ||||
| 2 | 50 | VXR2390-20 | 42.8 | 48 | 4,600 | ||||
*1: This is the grommet value. Add 10 g for conduit types, 30 g for DIN terminals, 60 g for terminals respectively.
*2 See the SMC catalog for details on the maximum and minimum operating pressure differentials and the maximum system pressure.
Solenoid Specifications
| Model | Power Supply | Frequency Hz | Apparent Power VA | Power Consumption W (Holding) | Temperature Increase °C (Rated Voltage) | |
|---|---|---|---|---|---|---|
| Inrush | Holding | |||||
| VXR21 | AC | 50 | 20 | 11 | 4.5 | 45 |
| 60 | 17 | 7 | 3.2 | 35 | ||
| DC | - | - | - | 6 | 55 | |
| VXR22 | AC | 50 | 40 | 18 | 7.5 | 60 |
| 60 | 35 | 12 | 6 | 50 | ||
| DC | - | - | - | 8 | 60 | |
| VXR23 | AC | 50 | 50 | 21 | 11 | 65 |
| 60 | 45 | 17 | 9.5 | 60 | ||
| DC | - | - | - | 11.5 | 65 | |
- *Value is for when rated voltage is applied and ambient temperature is 20°C ±5°C.
- *It is possible to change the coil from AC to DC during use. However, it is not possible to change from DC to AC.
(The lack of a shading coil for DC means there may be a humming.) - *The return voltage is 20% or more of the rated value for an AC power supply and 2% or more of the rated value for a DC power supply.
- *The allowable voltage fluctuation is ±10% of the rated voltage.
Fluid Temperature and Ambient Temperature
| Temperature Conditions | Power Supply | Fluid Temperature °C | Ambient Temperature °C | |||
|---|---|---|---|---|---|---|
| Water (Standard) | Oil (Standard) | High Temperature Water *2 (D) | High Temperature Oil *2 (D) | |||
| Maximum | AC | 60 | 60 | 80 | 80 | 60 |
| DC | 40 | 40 | - | - | 40 | |
| Minimum | AC/DC | 1 | -5*1 | - | - | -10 |
*1 50 mm2/s or less.
*2 The D within the parenthesis ( ) is the option symbol.
Structure / Principle Part Materials
Normally closed (N.C.) diagram
| Number | Part Name | Material | |
|---|---|---|---|
| Standard | Option | ||
| 1 | Body | CAC408 | - |
| 2 | Bonnet | CAC408 | - |
| 3 | O-Ring | NBR | FKM |
| 4 | Diaphragm Assembly | SUS, brass, NBR | SUS, brass, FKM |
| 5 | Valve Spring | SUS | - |
| 6 | Core Assembly | SUS, copper | - |
| 7 | Armature Assembly | SUS, NBR | SUS, FKM |
| 8 | Return Spring | SUS | - |
| 9 | Coil Assembly | Class B molded | Class H molded |
Operation
When the coil (9) is energized, the armature assembly (7) is attracted into the core of the core assembly (6), opening pilot valve (A). When the pilot valve (A) is opened, the pressure in the pressure action chamber (B) falls, opening the main valve (C). When the coil (9) is not energized, the pilot valve (A) closes and the pressure in the pressure action chamber (B) increases, closing the main valve (C).
Water Hammer Relief
- A check valve mechanism is provided on the (E) side of the supply orifices (D) and (E). Supply into the pressure action chamber (B) can be controlled in 2 stages by moving the diaphragm assembly (4). After cutting power, orifice (E) will become blocked when the port of main valve (C) reduces in its opening diameter. Having this slower valve closing speed helps alleviate the water hammer effect.
Water Hammer Relief, Pilot Operated 2 Port Solenoid Valve VXR21/VXR22/VXR23 Series, For Water/Oil, Normally Open (N.O.) Specifications
Normally open (N.O.) external appearance
Normally open (N.O.) display symbol
*When the valve is closed IN and OUT are blocked, but the fluid cannot be blocked when the pressure at port 2 exceeds the pressure at port 1.
Model / Valve Specifications (Normally Open)
| Connection | Orifice Diameter mm ø | Model | Minimum Operating Pressure Differential *2 MPa | Maximum Operating Pressure Differential *2 MPa | Flow Rate Characteristics | Maximum System Pressure *2 MPa | Weight *1 g | ||
|---|---|---|---|---|---|---|---|---|---|
| Thread | Water | Oil | Water/Oil | ||||||
| Kv | Conversion Cv | ||||||||
| 1/2 | 20 | VXR2152-04 | 0.04 | 0.7 | 0.6 | 5.7 | 6.5 | 1.5 | 1,270 |
| 3/4 | 20 | VXR2152-06 | 6.4 | 7.5 | 1,270 | ||||
| 1 | 25 | VXR2262-10 | 10.3 | 12 | 1,770 | ||||
| 1 1/4 | 35 | VXR2272-12 | 18.9 | 22 | 2,900 | ||||
| 1 1/2 | 40 | VXR2382-14 | 25.7 | 30 | 3,700 | ||||
| 2 | 50 | VXR2392-20 | 42.8 | 48 | 4,600 | ||||
*1: This is the grommet value. Add 10 g for conduit types, 30 g for DIN terminals, 60 g for terminals respectively.
*2 See the SMC catalog for details on the maximum and minimum operating pressure differentials and the maximum system pressure.
Solenoid Specifications
| Model | Power Supply | Frequency Hz | Apparent Power VA | Power Consumption W (Holding) | Temperature Increase °C (Rated Voltage) | |
|---|---|---|---|---|---|---|
| Inrush | Holding | |||||
| VXR21 | AC | 50 | 25 | 12 | 5 | 50 |
| 60 | 20 | 8 | 3.5 | 35 | ||
| DC | - | - | - | 6 | 50 | |
| VXR22 | AC | 50 | 45 | 20 | 8 | 55 |
| 60 | 40 | 15 | 6.5 | 45 | ||
| DC | - | - | - | 8 | 50 | |
| VXR23 | AC | 50 | 60 | 25 | 10.5 | 60 |
| 60 | 50 | 20 | 9.5 | 50 | ||
| DC | - | - | - | 11.5 | 55 | |
- *Value is for when rated voltage is applied and ambient temperature is 20°C ±5°C.
- *Changing coils from AC to DC and vice-versa during use is not possible because of the different core shape.
- *The return voltage is 20% or more of the rated value for an AC power supply and 5% or more of the rated value for a DC power supply.
- *The allowable voltage fluctuation is ±10% of the rated voltage.
Fluid Temperature and Ambient Temperature
| Temperature Conditions | Power Supply | Fluid Temperature °C | Ambient Temperature °C | |||
|---|---|---|---|---|---|---|
| Water (Standard) | Oil (Standard) | High Temperature Water *2 (D) | High Temperature Oil *2 (D) | |||
| Maximum | AC | 60 | 60 | 80 | 80 | 60 |
| DC | 40 | 40 | - | - | 40 | |
| Minimum | AC/DC | 1 | -5*1 | - | - | -10 |
*1 50 mm2/s or less.
*2 The D within the parenthesis ( ) is the option symbol.
Structure / Principle Part Materials
Normally open (N.O.) diagram
| Number | Part Name | Material | |
|---|---|---|---|
| Standard | Option | ||
| 1 | Body | CAC408 | - |
| 2 | Bonnet | CAC408 | - |
| 3 | O-Ring | NBR | FKM |
| 4 | Diaphragm Assembly | SUS, brass, NBR | SUS, brass, FKM |
| 5 | Valve Spring | SUS | - |
| 6 | Core Assembly | SUS, copper, NBR, POM, PTFE | SUS, copper, FKM, PTFE |
| 7 | Coil Assembly | Class B molded | Class H molded |
Operation
When the coil (7) is energized, the opened pilot valve (A) closes and the pressure in the pressure action chamber (B) increases, closing the main valve (C). Cutting power to the coil (7) will open the closed pilot valve (A) and decrease the pressure in the pressure action chamber (B), opening the main valve (C).
Water Hammer Relief
- A check valve mechanism is provided on the (E) side of the supply orifices (D) and (E). Supply into the pressure action chamber (B) can be controlled in 2 stages by moving the diaphragm assembly (4). After energizing, orifice (E) will become blocked when the port of main valve (C) reduces in its opening diameter. Having this slower valve closing speed helps alleviate the water hammer effect.
Water Hammer Relieving Characteristic Diagrams
VXR2150, VXR2152, VXR2260, VXR2262
Water hammer relieving characteristic diagram 1
Water Hammer
(Example) The VXR2 Series helps greatly mitigate the severe water hammer effect generated by use of normal solenoid valves. This prevents vibrations and damage to piping, equipment and devices. The graph above shows an overview of how the water hammer effect is mitigated.
How to Read the Graph
When there is 30 m of SGP piping with the same diameter as the solenoid valve being used, the maximum pressure will be approximately 1.1 MPa with an initial pressure of 0.5 MPa. (4 to 7 MPa for general use solenoid.)
VXR2270, VXR2272, VXR2380, VXR382, VXR2390, VXR2392
Water hammer relieving characteristic diagram 2
How to Read the Graph
When there is 30 m of SGP piping with the same diameter as the solenoid valve being used, the maximum pressure will be approximately 0.8 MPa with an initial pressure of 0.5 MPa. (2 to 4 MPa for general use solenoid.)
*See the SMC catalog for information other than that detailed above.
| Part Number |
|---|
| Part Number | Minimum order quantity | Volume Discount | Days to Ship | Applicable Fluid | Operating Environment | Switching Type | Connection Type | Plumbing Thread Nominal | Insulation Class | Voltage | Sealing materials | Option | Detailed type | Lead wire electrical entry | Body size |
|---|
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Basic Information
| Type | Electromagnetic Type | Driving Type | Pilot Type | Number of Solenoids | Single Solenoid |
|---|---|---|---|---|---|
| Application | Single Item | Body material | CAC408, copper |
Specification/Dimensions
-
Applicable Fluid
- Water
- Oil
-
Operating Environment
- Standard
- Water Hammer Compatible
-
Connection Type
- Rc (R)
- G
- NPT
- NPTF
- Rc (R)
-
Plumbing Thread Nominal
-
Voltage
- 12 V DC
- 24 V DC
- 100 V AC 50/60 Hz
- 110 V AC 50/60 Hz
- 200 V AC 50/60 Hz
- 220 V AC 50/60 Hz
- 240 V AC 50/60Hz
- 240 V AC 50/60 Hz
-
Sealing materials
- FKM
- NBR
-
Option
- None
- Surge voltage suppressor / With light
- With light
- With surge suppressor
-
Detailed type
- Fuel oil (up to 60°C)
- Hot water (up to 80°C) / Fuel oil (up to 80°C)
- Standard
-
Lead wire electrical entry
- Conduit
- Conduit terminal
- DIN terminal
- Grommet
-
Body size
- 20A
- 25 A
- 32A
- 40A
- 50A
-
type
- VXR21
- VXR22
- VXR23
-
Switching Type
- Normally Closed
- Normally Open
Days to Ship
-
- All
- 21 Day(s) or Less
Specify Alterations
- The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .
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