The Stop-Silent Check Valve features a cone design that assures tight shut-off to prevent backflow of liquid or gaseous media. The design also eliminates water hammer and associated problems of noise and wear, resulting in noise-free operation and long service life, according to the manufacturer. Offered with the choice of several diaphragm materials and mounting styles to meet varying application requirements, the valve is suitable for applications such as water distribution pumps and compressors, air-conditioning units and ventilation systems. The corrosion-resistant valve can handle fluids up to 10 feet per second and gases up to 50 feet per second and is suitable for use in water, oil, acids and brines.

Lasso Technik Inc., Basel, Switzerland, (714) 717-5271; www.stopsilent.com.

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