Lasso Technik”sStop-Silent check valve features a unique cone design that assurestight shutoff to prevent backflow of liquid or gaseous media. Thisdesign also eliminates water hammer and associated problems of noiseand wear, resulting in quiet, noise-free operation and long servicelife. Offered with choice of several diaphragm materials and mountingstyles to meet varying application requirements, the valve is suitablefor use in a range of applications, including water distribution, watertreatment, chemical production plants, petrochemical installations, andfood processing.  Other consumer and commercial applicationsinclude use in washing machines, pumps and compressors,air-conditioning units, and ventilation systems.
The valve’s servicelife is further extended with its simple construction of only twononmoving components – a perforated stainless steel cone and diaphragm.With no moving mechanical parts to wear, such as springs, bearings, orcounterweights typically found in other types of check valves, userscan expect a maintenance-free service life of up to 10 years. The valvesupports a temperature range of -20 C up to 180 C and an operatingpressure of up to 232 PSI.  The valve can handle fluids up to 10feet per second and gases up to 50 feet per second and is suitable foruse in water, oil, acids, and brines.  Standard cones and valvesizes are available from one inch to eight inches with multicone valvesin sizes from six inches to 24 inches. Diaphragm materials areavailable in EPDM, nitrile rubber, silicone, or fluorine rubber (e.g.Viton).