Caleffi series 519 adjustable differential by-pass valve
The Caleffi 519 series by-pass valve maintains the operating point of the pump as close as possible to its nominal value . It is used in systems that can work with significant variations in flow rate due to the presence of thermostatic valves or two-way motorized valves; its function is to ensure a flow recirculation proportional to the number of valves that close, limiting the maximum value of the differential pressure generated by the pump.
Made with quality components that ensure performance and durability over time, it must be chosen based on the start-of-opening calibration and the flow rate to be by-passed and can be mounted in any position as long as the direction of flow indicated by the arrow is respected shown on the valve body.
The installation must be carried out by expert and qualified technical personnel; further information regarding installation methods and technical specifications is contained in the user manual supplied with the product.
NB : for indications regarding dimensions , please refer to the attached technical data sheet .
TECHNICAL FEATURES
- 3/4 threaded connections
- Brass body
- Brass shutter
- EPDM shutter gasket
- O-Ring seals in EPDM
- Union seals in non-asbestos NBR
- ABS knob
- Stainless steel spring
- Temperature range 0–110 °C
- Maximum operating pressure 10 bar
- Calibration range 10–60 kPa
WARRANTY
The warranty is the official Caleffi one and lasts 2 years.
