Ball shut-off valve DN50 for the Sanicubic outlet installation D50K

Solution for Sanitary Installation Service and Safety

This 50 mm ball valve is a key component mounted at the outlet of sewage pumping stations, such as devices from the Sanicubic or Sanicom 2 series. Its primary function is to ensure safe flow isolation, which in practice facilitates easier disassembly of the unit for service, repair, or replacement. By closing this valve, the installer can minimize the risk of sewage leakage during maintenance work, which is particularly critical when handling wastewater and fecal matter.

It is worth noting that this model replaces older solutions used in solvent-welded pipe systems. The valve features a full bore, ensuring unobstructed medium flow and reducing the risk of blockages at the installation point. This is a plug-and-play solution for outlet installations from SFA devices, where rapid flow isolation is required without cutting pipes or using complex additional accessories.

Construction and Materials Resistant to Sewage Environment

The durability of this component relies on the use of materials resistant to the chemical and biological corrosion typical of sewage installations. The body is made of PVC-U (unplasticized polyvinyl chloride), guaranteeing resistance to aggressive substances contained in domestic and industrial wastewater. The valve has a two-piece construction, facilitating its installation and potential future gasket replacement.

The ball sealing relies on PTFE (Teflon), while the stem is sealed with ethylene-propylene-diene monomer rubber (EPDM) and additional FPM/FKM (fluorocarbon rubber) sealing. This combination of materials ensures tightness even in the presence of fats, chemicals, or high domestic water temperatures. The valve actuation is achieved via a handwheel, allowing intuitive control of the open or closed state without the use of specialized tools.

Practical Application and Operational Benefits

This valve not only facilitates service work but also serves as protection against unauthorized toilet use in emergency situations, such as power outages in the building. In such cases, closing the valve prevents sewage from flowing back into sanitary rooms or into the SFA unit itself, protecting them from flooding. This is particularly important in public utility buildings or multi-family properties where access to the installation may be limited or require a rapid response.

The practical operational aspects of this model result directly from its construction: the full bore eliminates flow resistance and prevents sediment accumulation inside the valve, which is crucial for fecal transport. Operation at a working pressure up to PN 16 ensures safety even under dynamic pumping station conditions. The specific connection configuration – a DN 50 flange on one side and a 50 mm outer diameter solvent-welded spigot on the other – allows direct integration with various PVC-U pipe types without additional reducing fittings. Additionally, the presence of a drain function enables rapid emptying of the installation section before disassembling the source unit, significantly reducing service time and limiting the spread of waste.

Thanks to its simple installation and high chemical resistance, the valve is suitable for both new installations requiring outlet protection from pumping stations and as a replacement for modernizing older SFA systems. Its application directly translates to reduced downtime during repairs and increased safety for end-users against sewage backflow.