Flow Valves | McMaster-Carr

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14,955 Products

Fluid Handling

On-Off Valves

Start and stop flow through a line

Flow-Adjustment Valves

Flow-Adjustment Valves

Gradually open and close to control the volume of air and liquids though a line

Check Valves

Permit flow in only one direction by closing when flow stops or reverses

Diverting Valves

Diverting Valves

Redirect flow between ports

Directional Control Valves

Directional Control Valves

Manage the flow of fluids to move equipment in air- and hydraulic-powered systems

Valve Actuators

Valve Actuators

Automatically start and stop flow to your valve

Flow-Regulating Valves

Flow-Regulating Valves

Maintain the set flow rate of fluid through your system

Valve Bodies

Attach to actuators to automatically or manually control flow in your line

Drain Valves

Vent air or discharge liquids to remove excess fluid from your system

Float Valves

Open or close a pipe connection when liquids in a container reach a set level; also known as ballcocks

Float Valve Bodies

Float Valve Bodies

Pair with floats and rods to create float valves that meet your needs

Valve Repair Kits

Valve Repair Kits

Maintain valves with replacement parts such as seals, plungers, and springs

Tap Valves

Pierce copper tubing for a secondary line to humidifiers and ice makers; also known as saddle valves

Solenoid Coils

Replace the coil that actuates your flow-control valve

Pilot Valves

Control air supply to the actuator in other valves

Valve Union Fittings

Valve Union Fittings

Mating parts join valves to a line for quick connection and removal

Orifice Valves

Restrict the flow of liquids and gases to precisely control rate and pressure

Air Valves

Fill tanks, tires, and other pressurized equipment

Air Vent Valves

Air Vent Valves

Eliminate air pockets from fluid lines to maintain consistent flow and prevent surges

Backflow-Prevention Valves

Backflow-Prevention Valves

Dual checks stop flow from reversing and contaminating your system

Air Pulse Valves

Air Pulse Valves

Convert continuous flow into bursts that reduce air consumption in dryers and dust collectors

Sampling Valves

Sampling Valves

Drain a small amount of fluid for inspection without disrupting flow

Vacuum Breakers

Vacuum Breakers

When pressure drops, vents open to prevent suction from drawing liquid back upstream

Air-Exhaust Valves

Air-Exhaust Valves

Vent or divert exhaust to speed up the operation of air cylinders, actuators, and other equipment

Sump Pump Backflow-Prevention Valves

Sump Pump Backflow-Prevention Valves

Block dirty water from returning to your sump pump

Valve Stem Adapters

Valve Stem Adapters

Connect valve stems to actuators with an ISO 5211 hole pattern

Pressure-Relief Valves

Pressure-Relief Valves

Protect equipment by opening at a set pressure and closing when the pressure drops; for repeated use

Pressure-Regulating Valves

Pressure-Regulating Valves

Reduce inlet pressure to a lower outlet pressure to protect sensitive equipment

Pressure-Relief Discs

Pressure-Relief Discs

Rupture at a set pressure or temperature to vent fluid and gas and protect machinery; one-time use

Vacuum-Relief Valves

Vacuum-Relief Valves

Open at a set vacuum and close when the vacuum level drops to protect equipment

Compressed Gas Valves

Compressed Gas Valves

Check and adjust the pressure of compressed gas in tanks; also known as Schrader valves

Pipe and Pipe Fittings

Pipe and Pipe Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

Hose and Hose Fittings

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

Air Chucks

Connect air hose to Schrader valves, which are common on tires and hydraulic systems

Tube and Tube Fittings

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

Flame Arresters

Flame Arresters

Absorb heat from a fire in your gas pipeline to stop it from traveling back to the gas source

Mixing Valves

Blend hot and cold water, steam, or oil to maintain a set outlet temperature and prevent scalding

Tank Mixing Nozzles

Tank Mixing Nozzles

Circulate liquid in tanks to keep solids from settling

Gas Mixers

Supply controlled amounts of air and gas to burners

Facility and Grounds Maintenance

Garden Hose Faucets

Garden Hose Faucets

Connect garden hose to lines coming from a building or the ground

Shower Valves

Control water and regulate temperature to prevent scalding

Sink Faucets

Manual and touch-free faucets for janitorial, restroom, and food service sinks

Drain Check Valves

Drain Check Valves

Prevent water damage by placing into floor drains to stop sewer back-ups

Power Transmission

Hydraulic Check Valves

Hydraulic Check Valves

Open to allow hydraulic fluid flow in one direction and close when flow stops or reverses

Air Flow Check Valves

Air Flow Check Valves

Open to allow air flow in one direction and close when flow stops or reverses

Hydraulic Flow-Adjustment Valves

Hydraulic Flow-Adjustment Valves

Turn the knob to gradually adjust the flow of hydraulic fluid

Lubricating

Coolant Dispenser Hose and Fittings

Coolant Dispenser Hose and Fittings

Snap together and position to deliver coolant, oil, water, or air in any direction

Oil-Dispensing Pump Metering Valves

Oil-Dispensing Pump Metering Valves

Add to manual and electric pumps to dispense the right amount of oil to different lubrication points

Fastening and Joining

Welding Gas Flashback Arresters

Welding Gas Flashback Arresters

Attach to your gas welder to extinguish flames and stop reverse gas flow

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)