Si 4 Series

Developed as a modular design alongside other models, the new Si 4302-E1 provides reliable function with great capacity.

• The inner parts are made of stainless steel.
• On the extended bonnet, once the set screw is loosened there is no pre-loading force on the spring. The bonnet-flange bolts can now be removed easily.
• Easy maintenance when dismantling the valve for lapping of the seat and disc possible without change of set-pressure.
• The bellows are in a safe location outside the flow path to ensure extended lifetime.
• For vapours, gases and liquids: typical applications are pressure vessels, heat exchangers and piping systems, such as those found in the chemical and petrochemical industries, as well as in power plant technology, steam generation, potable water pipelines and cryogenic gas rectification.
• The new Si 4302-E1 flow capacity is identical to the previous Si 43 and exceeds the Si 6302 capacity. Centre-to-face dimensions of entire valve generation are unchanged. Height and weight may vary slightly.