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3PA/3PB Series structure is a pressure balanced type poppet valve,which is not affected by the working pressure and achieves a low wattage large flow rate performance.
3PA319-06
VPC Pneumatic
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Product Description
The 3PA series of direct-acting, pressurised three-port valves, with working pressures from 0.7 MPa to a low vacuum of -100 kPa, facilitates the construction of low-pressure/vacuum systems.
● Switchable between NO and NC.
● Port can be pressurized from any of 3 ports.
● The stem assembly valve seat and packing have the same diameter, so each port pressure differential is canceled by the stem assembly’s through hole and pressure is balanced at both ON and OFF.
Product Specifications
| Modle | 3PA1 | 3PA2 | 3PB1 | 3PB2 |
| Port size | M5 | 1/8 | 1/8 | 1/8, 1/4 |
| Valve and operation | Direct acting poppet valve | |||
| Working medium | Compressed air, low vacuum | |||
| Max. working pressure | 0.70 MPa | |||
| Min. working pressure | -100 kPa | |||
| Proof pressure | 1.05 MPa | |||
| Max.working pressure differential | 0.70 MPa | |||
| Ambient temperature | -5 to 50 ℃ (no freezing) | |||
| Working temperature | 5 to 50 ℃ | |||
| Lubrication | Not required | |||
| Degree of protection | Dust-proof | |||
| Vibration resistance | 50 m/s² or less | |||
| Shock resistance | 300 m/s² or less | |||
| Atmosphere | Cannot be used in corrosive gas environment | |||
| Response time* | 20 ms or less | |||
* The response time is the value at 0.5 MPa supply pressure, with no lubrication, and with the power ON. It depends on the pressure and the lubricant quality.
| Model | 3PA1 3PB1 | 3PA2 3PB2 | ||
| Raled voltage | AC | 100 V, 200 V (50/60 Hz) | ||
| DC | 24 V | |||
| Voltage fluctuation range | ±10% | |||
| Starting current | AC | 100 V | 0.032 A/0.027 A | 0.068 A/0.054 A |
| AC | 200 V | 0.016 A/0.014 A | 0.034 A/0.027 A | |
| DC | 24V | - | - | |
| Holding current | AC | 100 V | 0.028 A/0.022 A | 0.041 A/0.032 A |
| AC | 200 V | 0.014 A/0.011 A | 0.021 A/0.016 A | |
| DC | 24 V | 0.075 A | 0.075 A | |
| Power consumption (With indicator lamp) | AC | 100 V | 1.8 W/1.4 W (2.0 W/1.6 W) | 2.2 W/1.8 W (2.4 W/2.0 W) |
| AC | 200 V | 1.8 W/1.4 W (2.0 W/1.6 W) | 2.2 W/1.8 W (2.4 W/2.0 W) | |
| DC | 24 V | 1.8 W(2.0 W) | 1.8 W(2.0 W) | |
| Thermal class | B (malded coil) | |||
| Temperature rise | 30 ℃ | |||
* 100 VAC 50/60 Hz can be used with a rated voltage of 110 VAC 60 Hz and 200 VAC 50/60 Hz can be used with 220 VAC 60 Hz.
| Model | Port 1→2 | Port 2→1 | Port 23 | Port 3-→2 | ||||
| C[dm2/(s-bar)] | b | C[dm2/(s-bar)] | b | C[dm2/(s-bar)] | b | C[dm2/(s-bar)] | b | |
| 3PA1 | 0.34 | 0.29 | 0.35 | 0.42 | 0.38 | 0.43 | 0.35 | 0.32 |
| 3PA2 | 0.98 | 0.17 | 0 | 0.34 | 1.1 | 0.28 | 1 | 0.2 |
| 3PB1 | 0.37 | 0.05 | 0.33 | 0.21 | 0.41 | 0.28 | 0.42 | 0.08 |
| 3PB2 | 0.9 | 0.19 | 0.97 | 0.39 | 1 | 0.26 | 0.94 | 0.27 |
*1: Effective cross-sectional area S and sonic conductance C are converted as S ≈ 5.0 x C.
Product FAQ
Q1. Do solenoid valves fail open or closed?
Normally closed or normally open refers to the position of the solenoid when the coil is de-energized. A normally closed solenoid will block the air supply from the actuator when the coil is de-energized. Normally open solenoids allow an open path for the air supply to reach the actuator when the coil is de-energized.
Q2. Solenoid valve doesn't open / close properly?
Check power supply and make sure voltage and frequency are correct. Also check the connections. Check if flow direction matches with the indicators on the valve body or matches within limits as specified in the valve manual.
Q3. What the most common solenoid valve problems?
Common solenoid problems include plungers that are stuck either in or out, attached valves that are frozen in place, bad internal coil windings, and excessive noise during operation. Some of these problems are the result of internal solenoid issues, while others are typically caused by external components.
Q4. When should a solenoid valve be replaced?
As a general rule of thumb, if your solenoid valve show signs of wear or damage, then it is likely time for a replacement.
Q5. Solenoid valve troubleshoot
Check if the power supply is correct and the coil can dissipate heat by ventilation. Install a new coil and never power the coil when not mounted on the valve. Check for moisture within and replace if necessary. Replace any damaged or bent armatures as well, and check media compatibility with your valve.
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