3/4 Valves | McMaster-Carr

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Air Flow Check Valves

Air Flow Control Valves

Air Pulse Valves

Air Vent Valves

Air-Actuated On/Off Valves

Air-Exhaust Valves

Backflow-Prevention Valves

Check Valves

Compressed Air Filter/Regulator/Lubricator Manifolds

Compressed Air Filter/Regulator/Lubricators

Compressed Air Filter/Regulators

Compressed Air Filters

Compressed Air Regulator Manifolds

Compressed Air Regulators

Coolant Hose and Fittings

Directional Control Valves

Diverting Valves

Drain Valves

System of Measurement

Pipe Size

Body Material

For Use With

Thread Type

Fitting Connection

Handle Style

Material

Actuation

Gender

Connects To

Shape

Handle Type

Lockable with Ratchet Opening

Standard with Ratchet Opening

Valve Type

Air Release

Back-Pressure Regulator

Maximum Pressure @ Temperature

Inlet Pipe Size

Port Type

Ball Material

Maximum Temperature

Fitting Type

Valve Function

Back-Pressure Regulation

Temperature Regulation

Vacuum Regulation

Vacuum Relief

RoHS

Compliant

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

1,873 Products

Fluid Handling

Manual On/Off Valves

Start and stop flow through a line

331 products

Flow-Adjustment Valves

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

59 products

Diverting Valves

Redirect flow between ports

25 products

Solenoid On/Off Valves

A solenoid withstands rapid cycling for applications with frequent opening and closing

115 products

Valve Repair Kits

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

32 products

Check Valves

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

67 products

Valve Bodies

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

3 products

Air Vent Valves

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

8 products

Air-Actuated On/Off Valves

Operate on compressed air to start and stop flow faster than motor-driven valves

44 products

Propane Tank Valves

Start and stop the flow of propane from a tank

5 products

Float Valves

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

27 products

Motor-Actuated On/Off Valves

An electric motor handles higher flow rates and pressures than solenoid valves

7 products

Valve Union Fittings

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

4 products

Float Valve Bodies

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

19 products

Vacuum Breakers

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

10 products

Backflow-Prevention Valves

Dual checks stop flow from reversing and contaminating your system

7 products

Air-Exhaust Valves

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

17 products

Flow-Regulating Valves

Maintain the set flow rate of fluid through your system

7 products

Directional Control Valves

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

6 products

Liquid-Dispensing Metering Valves

Program to dispense a specific amount of liquid every time and shut off when set amount is reached

1 product

Drain Valves

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

6 products

Air Pulse Valves

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

2 products

Sampling Valves

Drain a small amount of liquid or gas for inspection without disrupting flow

1 product

Orifice Valves

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

20 products

Valve Mounts

Match standard NFPA mounting patterns to connect valves with multiple ports

2 products

Pressure-Relief Valves

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

63 products

Pressure-Regulating Valves

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

23 products

Vacuum-Relief Valves

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

1 product

Vacuum-Regulating Valves

Control the amount of air that a vacuum pump draws from your system to maintain vacuum levels

1 product

Mixing Valves

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

195 products

Injection Valves

Pump liquid into your process line or tank while preventing backflow

3 products

Tank Mixing Nozzles

Circulate liquid in tanks to keep solids from settling

1 product

Gas Mixers

Supply controlled amounts of air and gas to burners

2 products

Steam Traps

Extract condensation from lines without losing any steam

35 products

Strainers

Install next to valves and pumps to catch debris in your line

5 products

Mufflers

Reduce noise and filter exhaust fumes

2 products

Manifolds

Distribute air or fluid to multiple places from a single source; also called headers

127 products

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

62 products

Hose Nozzles

Control flow while dispensing water, fuel, hydraulic fluid, coolant, and chemicals

16 products

Flame Arresters

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

1 product

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

2 products

Junction Blocks

Organize and separate multiple lines in a pipe system; air and fluid flow through the threaded holes

6 products

Containers, Storage, and Furniture

Drum Faucets

Control the flow of liquid from drums, tanks, carboys, and other containers

18 products

Facility and Grounds Maintenance

Garden Hose Faucets

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

25 products

Urinal Flush Valves

Release water from a plumbing line into the urinal bowl

12 products

Sink Faucets

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

10 products

Power Transmission

Safety Lockout Valves

Prevent accidental start-up when servicing equipment

21 products

Compressed Air Filter/Regulators

Simultaneously clean air that's running through a system and control its pressure

149 products

Compressed Air Filter/Regulator/Lubricators

Deliver clean, lubricated air at the desired pressure to a component in your line

101 products

Compressed Air Filters

Purge particles, oil, and other contaminants from air lines to prevent damaging equipment

168 products

Compressed Air Regulators

Ensure continuous, safe operation of air-powered equipment by controlling air pressure

109 products

Compressed Air Regulator Manifolds

Use a single air supply to meet multiple pressure requirements

4 products

Compressed Air Filter/Regulator/Lubricator Manifolds

Distribute compressed air to multiple locations from a single source

8 products

Hydraulic On/Off Valves

Control the flow in high-pressure hydraulic systems

4 products

Air Flow Check Valves

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

3 products

Hydraulic Check Valves

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

8 products

Air Flow Control Valves

Control the speed of air-powered equipment by adjusting the volume of airflow entering or exiting

1 product

Lubricating

Coolant Hose and Fittings

Build a custom system to deliver coolant, cutting oil, water, or air in any direction

18 products

Safety Equipment

Fire Hose Nozzles

Attach to your fire hose to create a spray or stream of water

2 products