OVEM-14-H-B-QO-CE-N-1P Festo Vacuum Generator

Technical Overview

The OVEM-14-H-B-QO-CE-N-1P is a high-performance vacuum generator featuring a 1.4 mm Laval nozzle and a modular design. It integrates multiple functions including an electric ejector pulse valve, on-off valve, and a vacuum switch with a piezoresistive sensor. Designed for reliability and precision, it offers high vacuum characteristics with a maximum vacuum of 93% and a suction flow rate of 50.5 l/min. The unit includes an integrated open silencer and is equipped with a PNP switching output and LED display for clear status monitoring.

Key Features

Modular design
Integrated vacuum switch with piezoresistive measuring principle
Teach-in setting options with LED status display
High vacuum ejector characteristic
Short circuit current rating and reverse polarity protection
Manual override (non-detenting)
Integrated 40 µm filter
Open silencer design
RCM and c UL us listed (OL) approvals

Technical Specification Matrix

Parameter	Value
Nominal size, Laval nozzle	1.4 mm
Grid dimension	20 mm
Silencer design	Open
Mounting position	optional
Ejector characteristic	High vacuum Standard
Grade of filtration	40 µm
Manual override	Non-detenting
Integrated function	Electric ejector pulse valve, Flow control, Electric on-off valve, Filter, Check valve, Open silencer, Vacuum switch
Design	Modular
Short circuit current rating	yes
Measured variable	Relative pressure
Measuring principle	Piezoresistive
Switching element function	N/O contact
Switching function	Threshold value comparator, Threshold value with fixed hysteresis
Symbol	00992094
Valve function	Closed
Reverse polarity protection	For all electrical connections
Standard switching input	IEC 61131-2
Display type	LED
Setting options	Teach-in
Switching position indicator	LED
Switching status indication	Optical
Setting range threshold value	-1 bar ... 0 bar
Operating pressure	2 bar ... 8 bar
Operating pressure for max. vacuum	3.6 bar
Max. vacuum	93 %
Nominal operating pressure	6 bar
Max. suction flow rate against atmosphere	50.5 l/min
Air supply time at nominal operating pressure	0.2 s
Operational voltage range DC	20.4 V ... 27.6 V
Duty cycle	100%
Inductive protective circuit	Adapted to MZ, MY, ME coils
Insulation voltage	50 V
No-load supply current	<80 mA
Max. output current	100 mA
Off-state current	0.1 mA
Switching output	PNP
Voltage drop	≤1.5 V
Characteristic coil data	24 V DC: low-current phase 0.3 W, high-current phase 2.55 W
Immunity to surge	0.8 kV
Overload protection	Available
Pollution degree	3
Approval	RCM trademark, c UL us listed (OL)
KC mark	KC-EMV
CE mark (see declaration of conformity)	To EU EMC Directive
UKCA marking (see declaration of conformity)	To UK instructions for EMC
Operating medium	Compressed air to ISO 8573-1:2010 [7:4:4]
Note on operating and pilot medium	Lubricated operation not possible
Corrosion resistance class CRC	2 - Moderate corrosion stress
LABS (PWIS) conformity	VDMA24364 zone III
Media temperature	0 °C ... 50 °C
Relative air humidity	5 - 85 %
Sound pressure level at nominal operating pressure	77 dB(A)
Degree of protection	IP65
Protection class	III
Ambient temperature	0 °C ... 50 °C
Max. tightening torque	0.8 Nm with female thread, 2.5 Nm with through-hole
Product weight	371 g
Pressure measuring range	-1 bar ... 0 bar
Accuracy in ± % FS	0.5 %FS
Hysteresis	0.02 bar
Reproducibility of switching values FS	0.6 %
Switching logic for inputs	PNP (positive switching)
Electrical connection	M12x1 Plugs
Type of mounting	With through-hole, Via female thread, With accessories
Pneumatic connection, port 1	QS-8
Pneumatic connection, port 3	Integrated silencer
Vacuum connection	QS-8
Note on materials	RoHS-compliant
Material seals	NBR
Material receiver nozzle	POM
Material filter	Fabric PA, Sintered steel
Material filter housing	PA-reinforced
Material housing	Die-cast aluminium, PA-reinforced
Material adjusting screw	Steel
Material silencer	Wrought aluminium alloy, PU foam
Material screws	Steel
Material connector housing	Nickel-plated brass
Material electrical contact	Gold-plated brass
Material pins	Steel
Material transmitter nozzle	Wrought aluminium alloy
Material keypad	PA-reinforced
Material fitting	Nickel-plated brass

Industrial Applications

1. Robotic Handling of Solar Glass Panels

The Festo OVEM vacuum generator is utilized in the automated transfer of photovoltaic glass substrates during solar panel manufacturing. The unit is mounted directly on the robot end-effector to generate a high vacuum level immediately at the suction cup.

Problem Solved

Glass panels are heavy, smooth, and fragile, requiring a secure grip without slippage. The OVEM's 'High vacuum' characteristic (93%) provides maximum holding force on non-porous surfaces. The integrated 'Check valve' prevents the glass from dropping in case of a sudden air supply failure, ensuring safety and reducing material waste.

High vacuum 93%Integrated check valveEjector pulseVacuum switchTeach-in

2. Sheet Metal Feeding for Stamping Presses

In automotive stamping lines, this generator manages the suction cups that feed oily sheet metal blanks into the press. The integrated vacuum switch constantly monitors the pressure level to authorize the robot's movement only when a secure grip is confirmed.

Problem Solved

Stamping environments are harsh, with oil mist and dust that ruin standard sensors. The OVEM's IP65 protection class ensures durability in these conditions. Additionally, the 'Threshold value comparator' prevents 'double-sheet' feeding by detecting the vacuum level difference between one sheet and two, preventing costly die damage.

IP65 ratingThreshold value comparatorMax. vacuum 93%Operating pressure 2-8 barIntegrated filter

3. High-Speed Plastic Injection Molding Unloading

The system is used on a linear robot to rapidly extract finished plastic housings from an injection mold. The integrated ejector pulse valve is triggered to forcefully blow the part off the suction cup at the precise release point.

Problem Solved

Cycle time is critical in injection molding. The OVEM's fast 'Air supply time' (0.2 s) and the 'Electric ejector pulse valve' minimize the 'grip-and-release' cycle, increasing overall machine throughput. The 'LABS (PWIS) conformity' ensures the molded parts remain free of contaminants that could affect subsequent painting or coating processes.

Air supply time 0.2 sElectric ejector pulse valveLABS (PWIS) conformitySwitching output PNPFlow control