pumps, sealed cooling system air purgers, defogging gas conditioners, control systems, filters, flow regulators, pump level controllers, pressure regulators, check valves, gas control valves, temperature control hydraulic valves, lubricating oil, pressure relief valves, shut off valves, solenoid valves, refrigeration control system thermostatic expansion valves available from hansen technologies based in willowbrook, il. click the links below to visit our website or contact us via our profile page.