Campo de aplicación
- Refrigeration systems,
- heat pumps,
- Hot water systems,
- Biogas plants,
- Hydraulic systems
The safety pressure limiter is a safety switching devices for limiting the pressure in accordance with EN12263.
The electronic safety pressure DB-1000/2, the combination of a pressure limiter (PZH) and a safety pressure limiter (PZHH) are located in a common housing and thereby operate independently.
Pressure limiter (PZH) and safety pressure limiter (PZHH) monitor their own pressure threshold. When exceeding the respective output relay is deactivated and a signal LED flashes.
The release of the PZH of a pushbutton on the housing. The PZHH can be reset only after removing the cover by a button. The pressure cells of the PZH and PZHH be dimensioned depending on the application.
Pressure limiter for subcritical and transcritical applications
- Nominal pressure: allowed to 500bar, pressure thresholds adjusted as needed
- Pressure sensors: stainless steel membrane, overload-proof up to 2 x rated pressure, burst pressure is 2.5 times the nominal pressure
- The safety pressure limiter is suitable for use in conjunction with all refrigerants of the media groups 1 and 2 in accordance with Pressure Equipment Directive 97/23 / EC, for example,
- Mg1: NH3 (R717)
- Mg2: R22, R134a, R507, R23, R744 (CO2), R404a, R407A, R407c