The digital displays have an universal input for process signals and for almost all commercially available temperature sensors, a 24 VDC sensor supply up to 50 mA, an integrated summing function and 2 relay outputs. This means that the display can be used for almost all applications. It also impresses with the LED display, the installation depth and the IP65 front.
A PT 100 temperature sensor element is a platinum resistor with a nominal resistance of 100 Ω at 0 ° C. If the temperature is now changed in the measuring range, the resistance of the platinum resistance sensor changes due to the metallic properties. Because of this, a temperature measurement is possible.
The temperature sensor is very robust and largely insensitive to electrical interference, making it suitable for many applications. They are designed for a temperature range of ‑200 ° C to 850 ° C.
For more information about the PT 100 or other resistance temperature sensors please contact us!
Check valves are valves that can be shut off on one side. They open when the pressure on the input side is higher. Usually supported by a spring, they are closed by a poppet or a ball.
Check valves are available in several versions and allow different functions. We manufacture the right check valves for all systems, for gases or liquids and as single or double check valves. We manufacture pilot operated check valves for special applications.
We offer customer-specific pasteurization systems up to 7.000 bar. Please contact us with your request for further information.
We offer extraction systems up to 2,000 bar. Please contact us with your request for further information.
We offer bursting systems up to 16,000 bar. Please contact us with your request for further information.
We offer auto frettage systems up to 16.000 bar. Please contact us with your request for further information.
We offer standardized and customer-specific pressure testing systems and high-pressure systems for various applications.
The thermocouples have a connection for our high pressure screw connections and can be screwed directly into the pressure vessel. Depending on the application, thermocouples can be supplied for pressures of up to 10,000 bar and for operating temperatures of up to 600 ° C.
Axle plug and cable length as required.
Nipple and pressure nut included in delivery.
Thermocouples for higher temperature on request.
In order to master the relatively high axial forces required in larger screw connections, it makes sense to use screw tensioning devices. Dunze GmbH has been manufacturing screw tensioning devices very successfully for over 40 years.
Here, the screw is stretched hydraulically with a force that corresponds to the subsequent load plus a safety factor. There is no alternative method to produce screw connections with such precision and with the smallest possible loads for the screw connection. Our bolt tensioners are also a very inexpensive way to handle larger bolted joints.
There is no tightening friction in the thread, which is approx. 80% to 90% with manual tightening, and the setting forces are also significantly lower. A “seizure” of the thread has never been detected so far. Our screw tensioning devices are made of high-strength aluminum and are therefore very light.
The pressure build-up takes place in a ring cylinder. We usually design the required hydraulic pressures for a pressure range of 350 to 600 bar so that inexpensive pumps can be used and the risk of accidents is minimized.
The area of the ring cylinder required for tightening multiplied by the hydraulic pressure plus a safety factor of approx. 10% to 20% corresponds to the inner area of the device to be sealed multiplied by the operating pressure or the test pressure.
