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- Authoritative Model Code Definition
AG-3021-UNIVER
- AG: Series code for UNIVER standard vacuum poppet valves, differentiated from AI (pneumatic valves), CM (compact cylinders) and other series, specially designed for vacuum applications.
- 3021: Combined product specification code. 30 stands for 3/2-way valve type; 21 represents G1/2 port size plus normally open (NO) function.
- UNIVER: Original Italian brand logo, engaged in pneumatic component manufacturing for 60 years and a leading supplier of vacuum technology in Europe.
- Core Technical Parameters (Official Standard)
| Parameter Category | Detailed Specification | Remarks |
| Basic Parameters | ||
| Valve Type | 3/2-way Poppet Valve | Diaphragm structure, ideal for vacuum applications |
| Operation Mode | Normally Open (NO), opens when power off / no control air | Spring return, solenoid + auxiliary pneumatic control |
| Control Mode | Electric + compressed air auxiliary control (Type U2) | Auxiliary control air pressure ≥3bar required |
| Manual Operation | Screwdriver slot type manual emergency operation | Convenient for commissioning and troubleshooting |
| Performance Parameters | ||
| Port Size | G1/2″ (DN15) | Standard thread connection with high versatility |
| Rated Flow Rate | 20 m³/h | Strong vacuum suction, suitable for medium and small vacuum sucker systems |
| Maximum Vacuum Degree | 759.5 mmHg (0.5 Torr) | Approx. 101.2 kPa vacuum pressure, meets most industrial vacuum demands |
| Minimum Control Air Pressure | 3 bar | Ensure reliable valve switching |
| Response Time | ≤50 ms | Fast vacuum on-off to boost production efficiency |
| Physical Parameters | ||
| Valve Body Material | Zamak Zinc-Aluminum Alloy | Lightweight design with good corrosion resistance |
| Spool Material | Steel | High strength to guarantee sealing performance |
| Sealing Material | Polyurethane (valve seat) + Vulkollan (diaphragm) | Special vacuum sealing material with low leakage rate |
| Operating Temperature | 0℃ ~ +50℃ | Fit industrial environments, avoid condensed water freezing |
| Working Medium | Filtered air (50μm filtration precision) | Dry compressed air with oil mist lubrication is recommended |
| Weight | 1.235 kg | Easy installation, reduce equipment load |
| Protection Class | IP65 | Dustproof and waterproof, adaptable to harsh industrial conditions |
- Application Environment Guidelines
Recommended Scenarios (✅ Applicable)
- Automatic Production Lines: Vacuum sucker material handling systems (PCB boards, glass sheets, thin metal plates, cartons, etc.)
- Packaging Machinery: Vacuum thermoforming machines, vacuum sealing machines, vacuum adsorption systems for labelling machines
- Printing Equipment: Vacuum feeding for paper and positioning adsorption for printed products
- Electronic Manufacturing: Vacuum handling and positioning systems for semiconductor wafers and display panels
- Woodworking Machinery: Vacuum fixing for plates, vacuum worktables of CNC machining centers
Unrecommended Scenarios (❌ Avoid)
- Strong corrosive environments (acid & alkali gas): Custom stainless steel version is suggested.
- High-temperature environments (over 50℃): Accelerate seal aging and weaken vacuum performance.
- Oil-free lubrication systems: Cause seal wear and shorten service life in long-term operation.
- High-dust environments without filtration: Easily lead to spool jamming; fine filter installation is required.
- Liquid medium or high-humidity environments: Prone to internal icing and corrosion; air dryer shall be equipped.
- Cross-Brand Equivalent Replacement List
| Original Model | Alternative Brand | Replacement Model | Compatibility Notes |
| UNIVER AG-3021 | FESTO | VADMI-300-N | Same 3/2-way vacuum valve, G1/2 port, control air pressure needs adjustment |
| SMC | VV5Q11-06 | Normally open vacuum valve, Rc1/2 port, slight difference in mounting dimension | |
| AIRTAC | 3V310-10-NO | Economical alternative, PT1/2 port, longer response time (≤80ms) | |
| CAMOZZI | 338-015-00 | Same type vacuum poppet valve with basically identical performance parameters | |
| NORGREN | VM10101-06 | Vacuum solenoid valve compatible with UNIVER control systems, coil replacement needed |
- Complete AG Series Order Number List (Latest Official Version)
| Order No. | Full Model Name | Special Features | Applicable Scenarios |
| AG-3021 | AG-3021 | 3/2-way, G1/2, normally open, solenoid + pneumatic control | General vacuum systems, medium & small vacuum suckers |
| AG-3011 | AG-3011 | 3/2-way, G1/4, normally open, solenoid + pneumatic control | Mini vacuum systems for precise operation |
| AG-3031 | AG-3031 | 3/2-way, G3/4, normally open, solenoid + pneumatic control | Large vacuum systems with high flow demand |
| AG-3020 | AG-3020 | 3/2-way, G1/2, normally closed, solenoid + pneumatic control | Safety-prioritized systems, maintain vacuum when power off |
| AG-3022 | AG-3022 | 3/2-way, G1/2, normally open, pure pneumatic control (no solenoid) | Explosion-proof areas without electric control demand |
| AG-3023 | AG-3023 | 3/2-way, G1/2, normally open, with feedback signal | High-automation systems for status monitoring |
- Common Fault Diagnosis & Maintenance Solutions (Official Recommended)
| Fault Phenomenon | Possible Causes | Troubleshooting Steps | Maintenance Solutions |
| Insufficient vacuum degree | 1. Aged/damaged seals | 1. Check scratches on sealing surface | 1. Replace polyurethane seals |
| 2. Worn spool | 2. Measure control air pressure (≥3bar required) | 2. Grind or replace the spool | |
| 3. Insufficient control air pressure | 3. Inspect vacuum pipeline leakage | 3. Adjust control air pressure to standard value | |
| Valve fails to switch | 1. Faulty solenoid coil | 1. Check coil power supply (AC220V/DC24V) | 1. Replace coil of the same model |
| 2. Blocked control air circuit | 2. Dismantle air circuit to remove impurities | 2. Clean air circuit and install filter | |
| 3. Unreset manual operating lever | 3. Confirm manual lever is in automatic position | 3. Reset manual operating lever | |
| Valve cannot open after power cut | 1. Fatigued return spring | 1. Check spring elasticity | 1. Replace return spring |
| 2. Stuck spool | 2. Dismantle spool to remove foreign matters | 2. Clean spool and apply special vacuum grease | |
| 3. Excessively high vacuum pressure | 3. Verify vacuum pressure does not exceed rated maximum | 3. Adjust vacuum system pressure | |
| Air leakage from valve | 1. Broken diaphragm | 1. Check cracks on diaphragm | 1. Replace Vulkollan diaphragm |
| 2. Unsealed thread connection | 2. Confirm thread sealed with raw material tape/sealant | 2. Re-seal thread joints | |
| 3. Worn valve seat | 3. Inspect valve seat sealing surface | 3. Replace or grind valve seat | |
| Valve inactive with normal control air pressure | 1. Aged inelastic diaphragm | 1. Check diaphragm elasticity | 1. Replace diaphragm |
| 2. Blocked internal passage | 2. Dismantle valve body to clean internal passages | 2. Purge internal passages with compressed air | |
| 3. Wrong coil polarity | 3. Confirm correct positive and negative wiring of coil | 3. Adjust coil wiring polarity |
- Typical Application Cases
Case 1 Electronic Industry: PCB Board Vacuum Conveying System
Customer Profile
A large-scale PCB manufacturer with annual output of 1 million square meters multi-layer circuit boards, requiring high-speed and high-precision conveying for 0.2-3mm thick PCB boards.
Core Challenges
- Thin and flexible PCB boards are easy to be damaged by traditional mechanical clamps.
- Production line speed reaches 60m/min, requiring fast vacuum system response.
- Slight dust exists in working environment, stable vacuum performance is required.
- Vacuum pressure needs to be maintained after power off to prevent PCB falling.
Solutions
Equip 12 sets of AG-3021 vacuum valves matched with UNIVER vacuum suckers on both sides of conveying lines.
Adopt AG-3020 normally closed valves as standby to keep vacuum under power failure.
Install 5μm precision filters and automatic drainers to ensure clean air source.
Application Effects
- PCB damage rate dropped from 5% to 0.3%, saving about 2 million RMB annually.
- Vacuum response time less than 40ms, fully meeting high-speed production demands.
- Trouble-free continuous operation for 180 days, maintenance frequency reduced by 70%.
- Stable vacuum degree above 700mmHg ensures reliable PCB adsorption.
Case 2 Packaging Industry: High-speed Thermoforming Packaging Machine
Customer Profile
A food packaging enterprise producing 5 million packs of snack packages daily via thermoforming packaging machines.
Core Challenges
- Packaging film thickness only 0.08-0.15mm requiring even vacuum suction.
- Packaging speed up to 120 packs per minute needing rapid vacuum switching.
- High ambient temperature up to 40℃ demands good high-temperature resistance of valves.
- Oil-free pollution is required to meet food industry hygiene standards.
Solutions
Adopt standard AG-3021 matched with food-grade vacuum suckers.
Apply oil-free lubrication system equipped with oil mist separators.
Install temperature sensors to monitor valve operating temperature in real time.
Application Effects
- Packaging film breakage rate decreased from 3.5% to 0.8%, saving about 1.5 million RMB material cost yearly.
- Valve response time below 35ms satisfies high-speed packaging production.
- Passed FDA food-grade certification and meets food safety standards.
- Valve service life extended to 2 years, 50% longer than similar products.
- Compliance Certificates & Shipping Information
- Certifications
CE Certificate: Compliant with EU industrial electrical safety standard EN 60947-5-2
ISO 9001 Certificate: UNIVER quality management system certification
RoHS Certificate: Lead-free eco-friendly design complying with EU environmental directives
- Air Freight Compliance
No built-in lithium batteries, supercapacitors or hazardous substances
Classified as ordinary industrial pneumatic components, no special documents required for air and sea shipment
Package conforms to ISTA 2A standard for direct international transportation
- Origin: Manufactured in Milan, Italy, original imported with guaranteed quality
Precise Application Scenarios of UNIVER AG-3021 Vacuum Valve
Product Positioning: Italian UNIVER 3/2-way normally open vacuum solenoid valve with G1/2 port, specially used for vacuum adsorption circuit on-off control, suitable for medium-large flow and frequent switching.
Main Applicable Scenarios
- Automatic Manipulator Handling
Vacuum grabbing and transferring of steel plates, aluminum plates and stainless steel plates
Loading & unloading grabbing of cartons, plastic boxes and material containers
Vacuum adsorption and shifting of workpieces on assembly lines
- Packaging Machinery Industry
Vacuum circuit control for thermoforming machines
Negative pressure adsorption for vacuum labellers and film laminators
Food vacuum sealing machines, horizontal packing machines
Vacuum opening and feeding of express bags and packaging bags
- Printing & Paper Industry
Paper feeding and conveying for high-speed printing machines
Adsorption positioning of color boxes and corrugated boards
Vacuum fixing for die-cutting machines and paper pasting machines
- Woodworking Machinery
Vacuum plate fixing on CNC cutting machines and engraving machines
Negative pressure pressing for wooden doors and plate veneering
Plate positioning and clamping on furniture production lines
- Glass & Photovoltaic Industry
Vacuum grabbing and conveying of flat glass and tempered glass
Loading and unloading of photovoltaic glass and solar panels
Adsorption transferring of lenses and acrylic sheets
- 3C Electronic Industry
Vacuum conveying of PCB circuit boards
Material picking by adsorption for display panels, backlight panels and plastic housings
Vacuum positioning of battery cells and battery modules
- Logistics Sorting Industry
Vacuum diversion for automatic express sorting
Vacuum grabbing and stacking of materials
- Rubber & Plastic Industry
Vacuum control for plastic sheet and film stretching forming
Negative pressure shaping and adsorption conveying of rubber products
Applicable Working Conditions
- On-off matching for medium and small centralized vacuum generators
- 24-hour frequent start-stop vacuum systems on assembly lines
- General automatic equipment in clean air source and normal temperature workshops
- Safety working conditions requiring automatic vacuum breaking when normally open and power off
Inapplicable Working Conditions
- Severe environments with strong corrosion, heavy oil pollution and unfiltered dense dust
- High-temperature baking and hot air drying equipment above 50℃
- Ultra-high negative pressure precision micro vacuum testing equipment
- Underwater and damp immersion working conditions
- Flammable and explosive sites without explosion-proof modification
Complete Matching Coil Voltage Specifications for UNIVER AG-3021
Core Matching Information
AG-3021 adopts Type U2 electro-pilot valve; coils are separately optional accessories compatible with various standard industrial voltages.
| Voltage Type | Standard Rating | Coil Model | Power Rating | Applicable Scenarios |
| DC Voltage | 12V DC | DB-0501 | 11W | Mini equipment, battery-powered systems |
| 24V DC (Recommended) | DB-0502 | 11W | Standard industrial automation voltage, compatible with PLC systems | |
| 48V DC | DB-0503 | 11W | Special industrial equipment | |
| AC Voltage | 24V AC | DB-0507 | 10VA | Low-voltage safety systems |
| 110V AC | DB-0508 | 10VA | North American & Japanese standard industrial voltage | |
| 230V AC (European Standard) | DB-0509 | 10VA | European & Chinese standard industrial voltage | |
| 115V AC | DB-0510 | 10VA | Special application occasions |
Key Technical Points
- Voltage Fluctuation Range: ±10% of rated voltage (in line with UNIVER solenoid valve standards)
- Wiring Mode: Standard DIN Type A connector; optional 90° upward connector, inline connector or 300mm loose cable
- Duty Cycle: 100% continuous operation (ED=100%), suitable for 24-hour non-stop production lines
- Protection Class: Coil body IP65, dustproof and waterproof for industrial use
Selection Suggestions
- Prioritize 24V DC: Most widely used in industrial automation, compatible with PLC/DCS control systems with strong anti-interference performance.
- Notes for AC coils: 110V/230V AC coils shall be installed indoors in accordance with EN-60204-1 to ensure ventilation and heat dissipation.
- Special environments: Explosion-proof coils need customized order for hazardous areas.
- Installation Tip: Coils are connected to valve bodies via snap-fit structure for easy replacement without special tools.
FAQ
- Is the coil supplied together with the valve?
No. AG-3021 valve body and coil are sold separately; purchase coils according to actual control voltage.
- Are coils of different voltages interchangeable?
Yes. Coils with different voltage ratings can be replaced freely as long as they match Type U2 electro-pilot interface.
- Consequences of wrong voltage supply
Undervoltage: Insufficient electromagnetic force leads to failed valve switching
Overvoltage: Coil overheating burnout and electro-pilot valve damage
