Pulsation dampeners from Griffco Valve are designed to enhance the performance of chemical feed systems. The addition of a Griffco pulsation dampener to a pumping system will reduce harmful shock waves and deliver continuous chemical dosage at the injection point. The dampeners have maximum pressure ratings of 250 psi for metallic models and 150 psi for plastic models operating at up to 70 degrees F. Connection sizes include 1/2, 3/4 and 1 inch (DN 15, DN 20 and DN 25) in NPT, BSPT, socket, union or flange connections. Gauge port sizes include 1/8, 1/4 and 1/2 inch (DN 6, DN 10 and DN 15). 800/474-3326; www.griffcovalve.com.