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A pH controller consists of a probe to measure the current pH of the substance, chemicals to correct the pH via an injection pump, and a controller that calculates the required injection rate and activates the injection system.

Control Fluid Flow Pinch Valves & Accessories Available in cast iron, aluminum and PVC materials Pinch valves control the flow of fluids (liquid, gas or power) and provide a leak-proof seal when closed. They are cost-effective, simple to install and require little maintenance. The valves are made up of a valve body and a cylindrical sleeve reinforced with natural or synthetic rubber. Typically in an open state, the valve is closed by the application of pressure between the valve body and the sleeve. This pressure is created by a fluid, usually compressed air,that crushes the sleeve in a particular direction, completely closing the valve. Benefits: - Direct flow with no loss of head - Bubble free tightness even with the wettest liquids - Viscous or paste-like liquids pass with no choking or blocking - Abrasive meterial cause no damages - No moving parts; hence no maintenance - Self-cleaning; will not jam or seize Available in cast iron, aluminum and PVC materials, we offer a complete range of full-bore valves suitable for a range of applications