Backflow Preventer DN20

Brass or cast iron body Cast-iron operating square (30 x 30 mm) Nickel-coated brass ball

The GEMÜ 649 2/2-way diaphragm valve has a hollow shaft actuator and is electrically operated. The eSyDrive hollow shaft actuator can be operated as an OPEN/CLOSE actuator or as an actuator with integrated positioner or process controller. An integral optical and electrical position indicator is standard. — Hermetic separation between medium and actuator — Installation for an optimised draining is possible — Open/close function, positioner and process controller — Variable force and speed — Diagnostic functions — Operable via web interface eSy-Web — Electrical and mechanical position indicator — Actuator can be positioned in 45° steps

The GEMÜ 507 2/2-way angle seat globe valve has an ergonomically designed plastic handwheel and is manually operated. The valve spindle is sealed by a self-adjusting gland packing providing low maintenance and reliable valve spindle sealing even after a long service life. A wiper ring fitted in front of the gland packing protects the seal against contamination and damage. A stainless steel bellows and a handwheel extension are available as options (not for operator size 0). —Various valve body connections (threaded sockets, threaded spigots, butt weld spigots) available —High flow rates due to angle seat design —Optionally for contact with foodstuffs as per directive (EC) No. 1935/20041 (K-no. 1935)

The GEMÜ 498 PTFE seated butterfly valve is motorized. Various metal or plastic on/off or control actuators are available. Disc and shaft are one-piece, body and seat are available in different designs. The butterfly valve is available in nominal sizes DN 40 - 900 (1½? - 36?) and in wafer and lugged body versions. —Suitable for isolating and control functions with gaseous and liquid media —Seal material TFM™ (FDA 21CRF 177.1550) —Installation length acc. to ISO 5752/20, EN 558-1/20, JIS 10K