Piston-type back pressure regulators provide consistent back-pressure control in a variety of analytical and process instrumentation applications. Available in a variety of piston-type and diaphragm-type designs, all models feature a captured inlet gauze-type filter and fine pitch stem threads for precise control. Low internal volume allows rapid purging and limits the amount of surface area exposed to contamination. The design mechanically restricts the piston when the regulator is exposed to excess pressure. Three piston-type, back-pressure models are available.Swagelok: 440/349-5934; www.swagelok.com
