Refrigeration and cooling are required in industry, retail, and commerce.
Most medium sized and large compressors used worldwide are fitted with KRIWAN protection devices order to protect them and other components of refrigeration circuits in different applications.
- Compressors are effectively protected against thermal overload by the combinations PTC, PTC+, NTC, or current sensor and tripping unit.
- High temperatures on the hot gas side are monitored by KRIWAN hot gas sensors.
- Sufficient oil lubrication is required for the safe operation of a refrigerant compressor.
For compressors fitted with oil pumps, KRIWAN offers a differential pressure sensor which monitors whether enough oil is being conveyed to the crank shaft. In compressors with splash lubrication, a Kriwan oil level sensor is used for the same purpose.
As well as thermal protection, KRIWAN tripping units perform phase monitoring. Comprehensive compressor data can be retrieved via protection devices’ diagnostic ports, and analyzed.
Kriwan solutions are safe in combined systems at 120 bar
Operators of combined systems rely on things running smoothly at all times and at maximum efficiency. That is why, working for and together with the manufacturers of combined systems, Kriwan develops solutions for condition monitoring and the output regulation of reciprocating and screw compressors for this precise purpose.
In view of the F-gas regulation and the increasing popularity of natural refrigerants, Kriwan is already offering a whole portfolio of differential pressure and fluid-level sensors as well as oil-level regulators for subcritical and transcritical applications involving CO2 (R-744). Kriwan is also the right company to come to when there are challenges involving other refrigerants such as butane (R600a), propane (R290), ammonia (R-717), air (R-729), and water (R-718).
Electronics and sensors for chillers
In process refrigeration, chillers and water chillers ensure that the heat produced in industrial manufacturing and the production industries does not become a problem. They are often used to cool gases, lubricants, and other fluids as well. But chillers and water chillers are also used for air-conditioning in buildings in order to maintain the right temperature.
KRIWAN supports manufacturers of chillers and water chillers with our products for condition monitoring, output regulation in screw compressors, and our expertise in sensors and electronics.
KRIWAN hot gas sensors and phase monitors can be used to monitor chillers and cold water chillers at a system level. That applies also to systems using compressors with bimetallic protective switches; KRIWAN products protect against excessive compressor end-temperatures, compressors turning the wrong way, and damage caused by undervoltage.
Regulation, condition monitoring, and more for refrigeration equipment
Refrigeration and freezing solutions can be found everywhere: in supermarkets, butcher shops, gas stations, hotels, and catering. They ensure that goods can be stored efficiently and safely. The design of refrigeration and freezing equipment is becoming increasingly important as are the additional features associated with it: high-grade materials, intelligently designed access heights, and optimized goods presentation using LED lighting – these are just a few examples.
We can assist you with our collective electronic, development, and production expertise so that you can concentrate on developing and producing high-quality refrigeration equipment.
SOME OF THE THINGS KRIWAN CAN OFFER YOU:
- The right solution for more functional reliability
- Systems for consistent temperature regulation and intelligent air guidance/conveying to prevent drying
- Products for controlling refrigeration and freezing that are simple and logical to use
- Start-up control for plug-in one-phase compressors, including protection and diagnostic concepts