Norriseal Controls & Valves,Houston, USA.
Web Site:
Pneumatic & Electronic Liquid Level Controllers, Pneumatic Pressure Controllers, Pneumatic Temperature Controllers & Transmitters, Pneumatic & Electronic Positioners, Globe Control Valves, Filter Regulators, Butterfly Valves Rubber Lined & Teflon Seated.

NoReVa Deutschland GmbH,Monchengladbach, Germany.
Web Site:
Check Valves, low headloss, reflex spring none slam.

Red Valve Company Inc. Pittsburgh, USA.
Web Site:
Pinch Valves, manual and pneumatic or electric actuated control: Check Valves, Tideflex back flow prevention: Redflex Expansion and Vibration joints for liquids, gas and slurries.