pressure & flow control valves

Pressure and control valves are essential components in many types of HVAC equipment and systems. These small devices regulate the flow and pressure of various fluids, including water and refrigerant, enabling the system to operate efficiently and safely. Midwest Supply is your one-stop headquarters for a wide range of pressure and flow control valves and related equipment from leading manufacturers. Since 2015, we have provided high-performing products at competitive prices and backed them with exceptional service. We have the industry insight and expertise to help you succeed at every phase of your installation, repair or maintenance project.

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Mcdonnell Miller 133800 Water Feeder Low Water Cut-off 247-2 120/240 Volt | Midwest Supply Us

133800 | Water Feeder Low Water Cut-off 247-2 120/240 Volt | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 133800

Mcdonnell Miller 126800 Water Feeder 25A | Midwest Supply Us

126800 | Water Feeder 25A | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 126800

Mcdonnell Miller 123450 Flow Switch AF3-D with 2 Single Pole Double Throw Switches | Midwest Supply Us

123450 | Flow Switch AF3-D with 2 Single Pole Double Throw Switches | Mcdonnell Miller (OBSOLETE)

Brand: Mcdonnell Miller

SKU: 123450

Mcdonnell Miller 123400 Flow Switch AF3 Medium Velocity Single Pole Double Throw | Midwest Supply Us

123400 | Flow Switch AF3 Medium Velocity Single Pole Double Throw | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 123400

Mcdonnell Miller 123010 Flow Switch AFE1-1 with NEMA 7/9 Enclosure Single Pole Double Throw | Midwest Supply Us

123010 | Flow Switch AFE1-1 with NEMA 7/9 Enclosure Single Pole Double Throw | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 123010

Mcdonnell Miller 122920 Flow Switch AF1-J with Corrosion Coating Single Pole Double Throw | Midwest Supply Us

122920 | Flow Switch AF1-J with Corrosion Coating Single Pole Double Throw | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 122920

Mcdonnell Miller 122800 Flow Switch AF1 Single Pole Double Throw | Midwest Supply Us

122800 | Flow Switch AF1 Single Pole Double Throw | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 122800

Mcdonnell Miller 120191 Flow Switch FS7-4SW Stainless Steel Body NEMA 4X Enclosure Single Pole Double Throw 1-1/4 Inch NPT | Midwest Supply Us

120191 | Flow Switch FS7-4SW Stainless Steel Body NEMA 4X Enclosure Single Pole Double Throw 1-1/4 Inch NPT | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 120191

Mcdonnell Miller 120160 Flow Switch FS7-4S with Stainless Steel Body Single Pole Double Throw 1-1/4 Inch NPT | Midwest Supply Us

120160 | Flow Switch FS7-4S with Stainless Steel Body Single Pole Double Throw 1-1/4 Inch NPT | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 120160

Mcdonnell Miller 120150 Flow Switch FS7-4EL with Extended Paddle/Arm Single Pole Double Throw 1-1/4 Inch NPT | Midwest Supply Us

120150 | Flow Switch FS7-4EL with Extended Paddle/Arm Single Pole Double Throw 1-1/4 Inch NPT | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 120150

Mcdonnell Miller 119900 Flow Switch FS7-4L with Extended Paddle/Arm Single Pole Double Throw 1-1/4 Inch NPT | Midwest Supply Us

119900 | Flow Switch FS7-4L with Extended Paddle/Arm Single Pole Double Throw 1-1/4 Inch NPT | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 119900

Mcdonnell Miller 115100 Flow Switch FS4-3T1-1 Single Pole Double Throw 1 Inch NPT | Midwest Supply Us

115100 | Flow Switch FS4-3T1-1 Single Pole Double Throw 1 Inch NPT | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 115100

Mcdonnell Miller 114642 Flow Switch FS4-3DS with 2 Single Pole Double Throw Switches 1 Inch NPT | Midwest Supply Us

114642 | Flow Switch FS4-3DS with 2 Single Pole Double Throw Switches 1 Inch NPT | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 114642

Mcdonnell Miller 114610 Flow Switch FS4-3 Single Pole Double Throw 1 Inch BSPT | Midwest Supply Us

114610 | Flow Switch FS4-3 Single Pole Double Throw 1 Inch BSPT | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 114610

Mcdonnell Miller 113601 Flow Switch FS1-W High Sensitivity Single Pole Double Throw 1/2 Inch NPT | Midwest Supply Us

113601 | Flow Switch FS1-W High Sensitivity Single Pole Double Throw 1/2 Inch NPT | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 113601

Mcdonnell Miller 113550 Flow Switch FS1-J High Sensitivity Single Pole Double Throw 1/2 Inch BSPT | Midwest Supply Us

113550 | Flow Switch FS1-J High Sensitivity Single Pole Double Throw 1/2 Inch BSPT | Mcdonnell Miller

Brand: Mcdonnell Miller

SKU: 113550

Hydronic Caleffi 132992A Balance Valve Quick Setter 132 with Flowmeter 12.0-50.0 Gallons per Minute 2 Inch FNPT Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Midwest Supply Us

132992A | Balance Valve Quick Setter 132 with Flowmeter 12.0-50.0 Gallons per Minute 2 Inch FNPT Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Hydronic Caleffi

Brand: Hydronic Caleffi

SKU: 132992A

Hydronic Caleffi 132882A Balance Valve Quick Setter 132 with Flowmeter 8.0-32.0 Gallons per Minute 1-1/2 Inch FNPT Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Midwest Supply Us

132882A | Balance Valve Quick Setter 132 with Flowmeter 8.0-32.0 Gallons per Minute 1-1/2 Inch FNPT Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Hydronic Caleffi

Brand: Hydronic Caleffi

SKU: 132882A

Hydronic Caleffi 132772A Balance Valve Quick Setter 132 with Flowmeter 5.0-19.0 Gallons per Minute 1-1/4 Inch FNPT Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Midwest Supply Us

132772A | Balance Valve Quick Setter 132 with Flowmeter 5.0-19.0 Gallons per Minute 1-1/4 Inch FNPT Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Hydronic Caleffi

Brand: Hydronic Caleffi

SKU: 132772A

Hydronic Caleffi 132662A Balance Valve Quick Setter 132 with Flowmeter 3.0-10.0 Gallons per Minute 1 Inch FNPT Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Midwest Supply Us

132662A | Balance Valve Quick Setter 132 with Flowmeter 3.0-10.0 Gallons per Minute 1 Inch FNPT Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Hydronic Caleffi

Brand: Hydronic Caleffi

SKU: 132662A

Hydronic Caleffi 132557AFC Balance Valve Quick Setter 132 with Gauge and Flowmeter 2.0-7.0 Gallons per Minute 3/4 Inch Press Low Lead Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Midwest Supply Us

132557AFC | Balance Valve Quick Setter 132 with Gauge and Flowmeter 2.0-7.0 Gallons per Minute 3/4 Inch Press Low Lead Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Hydronic Caleffi

Brand: Hydronic Caleffi

SKU: 132557AFC

Hydronic Caleffi 132552A Balance Valve Quick Setter 132 with Flowmeter 2.0-7.0 Gallons per Minute 3/4 Inch FNPT Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Midwest Supply Us

132552A | Balance Valve Quick Setter 132 with Flowmeter 2.0-7.0 Gallons per Minute 3/4 Inch FNPT Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Hydronic Caleffi

Brand: Hydronic Caleffi

SKU: 132552A

Hydronic Caleffi 132537AFC Balance Valve Quick Setter 132 with Gauge and Flowmeter 0.5-1.75 Gallons per Minute 3/4 Inch Press Low Lead Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Midwest Supply Us

132537AFC | Balance Valve Quick Setter 132 with Gauge and Flowmeter 0.5-1.75 Gallons per Minute 3/4 Inch Press Low Lead Brass 150 Pounds per Square Inch 14-230 Degrees Fahrenheit | Hydronic Caleffi

Brand: Hydronic Caleffi

SKU: 132537AFC

Hydrolevel/Safeguard VXT24 Water Feeder Automatic Reset 24 VAC VXT24 for Steam Boilers | Midwest Supply Us

VXT24 | Water Feeder Automatic Reset 24 VAC VXT24 for Steam Boilers | Hydrolevel/Safeguard

Brand: Hydrolevel/Safeguard

SKU: VXT24

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Norgas Controls NGR02-BBA Gas Regulator | 3/4" NPT | 1/4" Orifice | Green Spring 6.5"-16"wc | Midwest Supply Us

NGR02-BBA | Gas Regulator | 3/4" NPT | 1/4" Orifice | Green Spring 6.5"-16"wc | Norgas Controls

Brand: Norgas Controls

SKU: NGR02-BBA

BAPI BA/10K-2-H210-D-BBX Duct Humidity (%RH) Sensor with Optional Temperature Sensor | Midwest Supply Us

BA/10K-2-H210-D-BBX | Duct Humidity (%RH) Sensor with Optional Temperature Sensor | BAPI

Brand: BAPI

SKU: BA/10K-2-H210-D-BBX

Norgas Controls N5D-1500-S GAS REGULATOR 1-1/2" NPT 7-11"WC CSA | Midwest Supply Us

N5D-1500-S | GAS REGULATOR 1-1/2" NPT 7-11"WC CSA | Norgas Controls

Brand: Norgas Controls

SKU: N5D-1500-S

BAPI ZPS-ACC04-1 Room Pressure Pickup Ports with Temperature Sensor | Midwest Supply Us

ZPS-ACC04-1 | Room Pressure Pickup Ports with Temperature Sensor | BAPI

Brand: BAPI

SKU: ZPS-ACC04-1

Belimo B214 Characterized Control Valve (CCV), 1/2", 2-way | Midwest Supply Us

B214 | Characterized Control Valve (CCV), 1/2", 2-way | Belimo

Brand: Belimo

SKU: B214

Everflow EPRC1501-NL 1-1/2" X 1" F1807 PEX Reducing Coupling Lead Free | Midwest Supply Us

EPRC1501-NL | 1-1/2" X 1" F1807 PEX Reducing Coupling Lead Free | Everflow

Brand: Everflow

SKU: EPRC1501-NL