Safety pressure controllers
Safety pressure controllers
Self-acting, medium-operated proportional controller, which through automatic opening of the valve prevents exceeding pressure before the valve (SAVA) and behind the valve (SAVD). The actuator features two diaphragms, which enable the valve to open in case of a defect at the control diaphragm. The controller is mainly used in district heating systems.
Function of the SAVA controller: the high upstream pressure in front of the valve is led to the lower part (high pressure connection) of the diaphragm inside the controller. Through a channel in the controller, the medium pressure is led from the valve to the upper side (low pressure connection) of the diaphragm.
The spring power of the control valve now affects the diaphragm, thus determining the effective differential pressure.
Function of the SAVD controller: the valve outlet pressure of the valve is led to the lower part (high pressure connection) of the diaphragm inside the controller. The upper side (low pressure connection) of the diaphragm is connected to the atmosphere. The spring power of the control valve now affects the diaphragm, thus determining the closing pressure.
Product Highlights
- Eliminates pressure variations and provide optimum operating conditions with improved temperature control quality
- Made for demanding systems, resistant to corrosion, cavitation and dirt
- Connected system is protected against pressure surges, fluctuations, cavitation and noise
Software tools
Videos
Benefits of differential pressure and flow controllers in DH or cooling systems (constant flow)
Product types shown: 1
AVDA
AVDA is self-acting differential pressure relief controller used for constant flow control or bypass control. Controller opens on rising differential pressure.
The controller has a control valve, an actuator with one control diaphragm and handle for differential pressure setting.
For apartment block heating, district heating plant and central heating systems.