Pinch Control Valve for Wash Water Discharge in Treatment Plant

In wastewater treatment plants a pressure control valve is often needed on a standby pump to control discharge of wash water from the wash water pumping station.

Wash water discharge diagram using pinch control valve (Red Valve) 

Red Valve Series 5400

The main pump and the standby pump are rated to provide maximum flow at a constant pressure. A pressure sensor with integral transmitter is required to continually monitor system pressure. Under normal operating conditions, the pressure control valve is normally closed. After the surface wash shuts down, pressure from the discharge pump changes. The sensed line pressure is transmitted to a controller which sends a signal to the positioner on the control valve.

As the line pressure increases, a Red Valve Series 5400 control pinch valve opens. As the flow demand increases, line pressure decreases, and the valve closes. This system constantly maintains the pressure needed to operate the system. From the pressure control valve, the system discharges to atmospheric pressure over a clear well.

Due to the potentially high pressure drop conditions, the pressure control valve needs to be able to withstand the effects of possible cavitation. Red Valve Series 5400 control pinch valves, with their one-piece elastomer cone sleeve construction, are ideally suited for this application. The flow characteristics and pressure drop capabilities of the cone sleeve controls the flow and handles the pressure drop in the system. To assure cavitation does not occur, a TFO variable orifice to stage the system pressure drop by creating back pressure on the control valve. This setup fulfills the need of the treatment plant, and is a proven cost-effective, maintenance-free solution.

Reprinted with permission from Red Valve.

Fluid Power Applications in Water and Wastewater Treatment Plants

In plants all across the Midwest, ASCO Numatics solenoid valves, cylinders, manifolds, and other fluid automation devices provide ultra-reliable service in water and wastewater treatment facilities. ASCO Numatics has a well-earned, 50 year reputation as a key supplier for OEMs, engineering contractors, valve assemblers, and end users seeking dependable treatment of potable water and wastewater.


Some of the most common applications to use ASCO Numatics products are:

• Air Preparation
• Aeration and Odor Control
• Bio Refinery Solutions
• Carrier Water Control
• Disinfection and Filtration
• Process Valve Piloting
• Seal Water Control
• Solids Dewatering

For additional information on water and wastewater treatment applications, read the document below. For assistance with any ASCO Numatics requirement, contact Process Control Solutions by calling (800) 462-5769 or visiting https://fluidpower.processcontrolsolutions.com.

ASCP Numatics Water Wastewater Application Brief from Process Control Solutions, LLC

Valve Selection Guide for Wastewater Treatment

Wastewater Treatment Facility

Over the past 30 years, the process of wastewater treatment has seen dramatic changes as world populations continue to increase and concern over the environment grows. Ever more stringent regulations for wastewater quality have been met with high-tech engineering. Red Valve Company has worked closely with the designers and operators of wastewater treatment plants across the globe to provide innovative solutions for the most difficult challenges faced in a treatment plant.

Unlike most valve companies who view water and wastewater as one and the same, Red Valve provides products specifically engineered for the rigors of use on slurries such as sewage, sludge and grit. Red Valve provides a Total System Solution for Wastewater Treatment that encompasses every step of the treatment process, from collection to final discharge. Their commitment is to provide dependable, cost effective products that offer the best possible solution for their particular application. See the brochure below for specific water treatment facility applications where these products provide a proven, superior engineered solution.

Contact Process Control Solutions with your valve and actuation requirements by calling (800) 462-5769 or by visiting https://flowcontrol.processcontrolsolutions.com.

Red Valve Solutions Guide for Wastewater Treatment Facilities from Process Control Solutions, LLC