HV 250
Minimum lubrication system for external feed of high-viscosity lubricants
- suitable for viscous, sticky lubricants in the viscosity range 200-500 mm²/sec
- ideal for applications with constant lubricant dosage
- simultaneous operation of up to 6 nozzles
- de-/activation of individual nozzles with optional valves
Operating principle
The HV 250 minimum lubrication system delivers and meters high-viscosity lubricants. The flow rate can be reproducibly adjusted via the feed pressure, which is controlled by a pressure regulator. The maximum possible flow rate depends on the viscosity of the lubricant, the length of the supply line to the nozzle and the dosing head, which can be individually selected for each outlet.
A second pressure regulator is used to set the spray air independently of this. Both media are conveyed separately to the nozzles in coaxial lines.
Characteristics
- two pressure regulators for independent metering of lubricant and spray air
- electrical or manual control of the spray function with only one switching signal
- independent de-/activation of individual nozzles with optional solenoid valves
- pressurized reservoir for lubricant delivery without pump or other moving parts
- reproducible flow rates even at low lubricant dosages
- extremely fast response even with long supply lines to the nozzle
- suitable nozzles and spraying devices available for various applications
Components
Spraying devices
Our spraying devices are the link between the dosing unit for external feeding (HCS, HV or PSD) and the application-specific nozzles. They are used to transport the media and to fix the nozzle in the work chamber of the machine.
The precisely metered lubricant is transported in the inner hose of the coaxial hose, protected from the outer hose - in which the spray air is conveyed. The standard polyurethane coaxial hose can optionally be replaced by a metal braided coaxial hose.
The coaxial hose is typically connected to a V2A mounting tube, which is used for installation in the working area of the machine. As an optional accessory, we offer a holding magnet with a suitable mounting set for this purpose.
For precise and changeable alignment, our nozzles with G1/8" connection can be screwed to a flexible articulated or metal hose.
The length specifications of the coaxial hose, the V2A tube and the articulated hose are to be understood as standard values. We will be pleased to supply you with application-specific designs.
Nozzles
Our nozzles operate based on the coaxial principle, in which the lubricant spray jet is stabilized by a surrounding air jacket jet. A low-pressure atomization occurs at the nozzle outlet, which ensures a homogeneous spray jet with relatively large liquid particles. In combination with the air-jacket jet, fogging is successfully avoided. The lubricant jet, which is protected by the air jacket jet, can be sprayed specifically onto the tool over relatively long distances.
Nozzle assortment
D10/10
| D05/10
| D10/06
|
Spray cone: 10° Connection thread: G1/8" Spraying distance: up to 80 mm | Spray cone: 5° Connection thread: G1/8" Spraying distance: up to 150 mm | Spray cone: 10° Connection thread: M6 Spraying distance: up to 60 mm |
Radial nozzles
| Flat-jet nozzles
| Saw block
|
Spray pattern: hollow cone or disc-shaped Width across flats: SW10 or SW7 Connection thread: G1/8" or M6 | Spray pattern: oval Opening angle: 60° Connection thread: G1/8" | Nozzle holder with coaxial hose connection for double-sided lubrication of a saw blade with 2xD10/10 nozzles |
Coaxial solenoid valves
Our MQL devices for external feeding can be equipped with up to six outputs, depending on the design. The media feed is (de)activated for all outputs together with a switching signal on the device. In order to nevertheless be able to control individual outputs/nozzles separately, we offer coaxial solenoid valves for integration into the nozzle feed lines.
2/2-way valve for integration into a coaxial line: Allows the lubricant to be switched off individually, |  |
2x 2/2-way valve for integration into a coaxial line: Allows the lubricant and the spraying air to be switched off individually |  |
Sensors
We offer the following sensors as standard for monitoring the HV 250:
Pressure monitoring: Electronic pressure switches from various manufacturers |  |
Level monitoring: Optoelectronic sensors with cable or |  |
- HV 250 can be combined with our tank extension
- Automatic refilling with filtered lubricant during operation
Further information
A free space of 300 mm is required above the unit for unobstructed filling. All dimensions in mm.
| Filling volume: | 1.8 liters |
| Unladen weight: | 8.0 kg |
| Control: | A switching signal for de-/activation of the lubrication function:
|
| Compressed air supply: | 4 - 6 bar; dry and filtered |
| Operating pressure: | 1 - 6 bar (delivery pressure) |
Please do not hesitate to contact us:
Technical support: +49 (0)721 573789 or support@tkm-systems.com
Quotation requests: info@tkm-systems.com