Watson McDaniel Company Datasheets for Air Valves

Air valves allow metered fluid flow in one or both directions. They are used in pneumatic circuits to regulate the rate of activation or exhaust of cylinders and other pneumatic devices.
Air Valves: Learn more

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Product Name Notes
Air Pilot -- A1
Air Pilot -- A4
Air Pilot -- A6
The “A” Air Pilot is being used in conjunction with the PL2 Control Panel Board to regulate steam pressure. A small air regulator on the panel board can be adjusted...
Pressure Regulating Valve -- 1 1/2" O-Series 0-10
Pressure Regulating Valve -- 1 1/2" O-Series 0-75
Pressure Regulating Valve -- 1 1/2" O-Series 10-30
Pressure Regulating Valve -- 1 1/2" O-Series 100-200
Pressure Regulating Valve -- 1 1/2" O-Series 30-130
Pressure Regulating Valve -- 1 1/2" O-Series 30-50
Pressure Regulating Valve -- 1 1/2" O-Series 40-100
Pressure Regulating Valve -- 1 1/2" O-Series 40-85
Pressure Regulating Valve -- 1 1/4" O-Series 0-10
Pressure Regulating Valve -- 1 1/4" O-Series 0-75
Pressure Regulating Valve -- 1 1/4" O-Series 10-30
Pressure Regulating Valve -- 1 1/4" O-Series 100-200
Pressure Regulating Valve -- 1 1/4" O-Series 30-130
Pressure Regulating Valve -- 1 1/4" O-Series 30-50
Pressure Regulating Valve -- 1 1/4" O-Series 40-100
Pressure Regulating Valve -- 1 1/4" O-Series 40-85
Pressure Regulating Valve -- 1" O-Series 0-10
Pressure Regulating Valve -- 1" O-Series 0-75
Pressure Regulating Valve -- 1" O-Series 10-30
Pressure Regulating Valve -- 1" O-Series 30-130
Pressure Regulating Valve -- 1" O-Series 30-50
Pressure Regulating Valve -- 1" O-Series 40-85
Pressure Regulating Valve -- 1/2" O-Series 0-10
Pressure Regulating Valve -- 1/2" O-Series 10-50
The “O” Series Pressure Regulating Valves are used for reducing pressure in steam, air, and water systems. Commonly used in heating and other process applications.
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 402 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 402 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 402 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 402 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 402 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 402 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 402 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 403 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 403 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 403 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 403 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 403 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 403 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 1 1/2" 403 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 402 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 402 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 402 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 402 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 402 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 402 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 402 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 403 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 403 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 403 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 403 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 403 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 403 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 1 1/4" 403 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 1" 402 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 1" 402 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 1" 402 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 1" 402 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 1" 402 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 1" 402 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 1" 402 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 1" 403 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 1" 403 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 1" 403 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 1" 403 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 1" 403 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 1" 403 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 1" 403 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 1/2" 402 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 1/2" 402 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 1/2" 402 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 1/2" 402 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 1/2" 402 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 1/2" 402 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 1/2" 402 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 1/2" 403 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 1/2" 403 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 1/2" 403 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 1/2" 403 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 1/2" 403 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 1/2" 403 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 1/2" 403 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 402 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 402 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 402 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 402 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 402 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 402 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 402 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 403 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 403 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 403 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 403 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 403 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 403 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 2 1/2" 403 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 2" 402 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 2" 402 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 2" 402 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 2" 402 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 2" 402 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 2" 402 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 2" 402 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 2" 403 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 2" 403 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 2" 403 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 2" 403 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 2" 403 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 2" 403 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 2" 403 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 3" 402 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 3" 402 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 3" 402 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 3" 402 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 3" 402 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 3" 402 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 3" 402 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 3" 403 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 3" 403 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 3" 403 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 3" 403 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 3" 403 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 3" 403 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 3" 403 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 3/4" 402 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 3/4" 402 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 3/4" 402 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 3/4" 402 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 3/4" 402 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 3/4" 402 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 3/4" 402 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 3/4" 403 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 3/4" 403 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 3/4" 403 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 3/4" 403 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 3/4" 403 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 3/4" 403 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 3/4" 403 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 4" 402 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 4" 402 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 4" 402 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 4" 402 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 4" 402 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 4" 402 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 4" 402 Series 50-200
Pilot-Operated Pressure Regulating Valve -- 4" 403 Series 0-10
Pilot-Operated Pressure Regulating Valve -- 4" 403 Series 10-50
Pilot-Operated Pressure Regulating Valve -- 4" 403 Series 100-200
Pilot-Operated Pressure Regulating Valve -- 4" 403 Series 200-280
Pilot-Operated Pressure Regulating Valve -- 4" 403 Series 30-125
Pilot-Operated Pressure Regulating Valve -- 4" 403 Series 40-100
Pilot-Operated Pressure Regulating Valve -- 4" 403 Series 50-200
The 402 and 403 Series Internally Pilot-Operated Pressure Regulating Valves are used for pressure reduction on steam mains and other process equipment. Pilot-operated regulators will maintain a constant and accurate...
Pressure Regulating Valve -- 1 1/2" 455 Series 1-6
Pressure Regulating Valve -- 1 1/2" 455 Series 15-45
Pressure Regulating Valve -- 1 1/2" 455 Series 40-70
Pressure Regulating Valve -- 1 1/2" 455 Series 5-20
Pressure Regulating Valve -- 1 1/2" 455 Series 60-125
Pressure Regulating Valve -- 1 1/4" 455 Series 1-6
Pressure Regulating Valve -- 1 1/4" 455 Series 15-45
Pressure Regulating Valve -- 1 1/4" 455 Series 40-70
Pressure Regulating Valve -- 1 1/4" 455 Series 5-20
Pressure Regulating Valve -- 1 1/4" 455 Series 60-125
Pressure Regulating Valve -- 1" 455 Series 1-6
Pressure Regulating Valve -- 1" 455 Series 15-45
Pressure Regulating Valve -- 1" 455 Series 40-70
Pressure Regulating Valve -- 1" 455 Series 5-20
Pressure Regulating Valve -- 1" 455 Series 60-125
Pressure Regulating Valve -- 1/2" 455 Series 1-6
Pressure Regulating Valve -- 1/2" 455 Series 15-45
Pressure Regulating Valve -- 1/2" 455 Series 40-70
Pressure Regulating Valve -- 1/2" 455 Series 5-20
Pressure Regulating Valve -- 1/2" 455 Series 60-125
Pressure Regulating Valve -- 2 1/2" 455 Series 1-6
Pressure Regulating Valve -- 2 1/2" 455 Series 15-45
Pressure Regulating Valve -- 2 1/2" 455 Series 40-70
Pressure Regulating Valve -- 2 1/2" 455 Series 5-20
Pressure Regulating Valve -- 2 1/2" 455 Series 60-125
Pressure Regulating Valve -- 2" 455 Series 1-6
The 455 Series Externally-Sensed Pressure Regulating Valves are used for reducing pressure in steam, air, and water systems. Commonly used in heating and other process applications. Externally-sensed regulators are often...
Pressure Regulating Valve -- 1 1/2" B Series 20-70
Pressure Regulating Valve -- 1 1/2" B Series 40-125
Pressure Regulating Valve -- 1 1/2" B Series 5-35
Pressure Regulating Valve -- 1 1/4" B Series 20-70
Pressure Regulating Valve -- 1 1/4" B Series 40-125
Pressure Regulating Valve -- 1 1/4" B Series 5-35
Pressure Regulating Valve -- 1" B Series 1-12
Pressure Regulating Valve -- 1" B Series 20-70
Pressure Regulating Valve -- 1" B Series 40-125
Pressure Regulating Valve -- 1" B Series 5-35
Pressure Regulating Valve -- 1/2" B Series 1-12
Pressure Regulating Valve -- 1/2" B Series 20-70
Pressure Regulating Valve -- 1/2" B Series 40-125
Pressure Regulating Valve -- 1/2" B Series 5-35
Pressure Regulating Valve -- 2 1/2" B Series 20-70
Pressure Regulating Valve -- 2 1/2" B Series 40-125
Pressure Regulating Valve -- 2 1/2" B Series 5-35
The B Series Pressure Regulating Valves are used for reducing pressure in air and water systems. These regulators are commonly found in industrial plants, apartment buildings, water supply systems, schools,...
Air Pilot-Operated Regulating Valve -- 1 1/2" DA1
Air Pilot-Operated Regulating Valve -- 1 1/2" DA4
Air Pilot-Operated Regulating Valve -- 1 1/2" DA6
Air Pilot-Operated Regulating Valve -- 1 1/2" HDA1
Air Pilot-Operated Regulating Valve -- 1 1/2" HDA4
Air Pilot-Operated Regulating Valve -- 1 1/2" HDA6
Air Pilot-Operated Regulating Valve -- 1 1/4" DA1
Air Pilot-Operated Regulating Valve -- 1 1/4" DA4
Air Pilot-Operated Regulating Valve -- 1 1/4" DA6
Air Pilot-Operated Regulating Valve -- 1 1/4" HDA1
Air Pilot-Operated Regulating Valve -- 1 1/4" HDA4
Air Pilot-Operated Regulating Valve -- 1 1/4" HDA6
Air Pilot-Operated Regulating Valve -- 1" DA1
Air Pilot-Operated Regulating Valve -- 1" DA4
Air Pilot-Operated Regulating Valve -- 1" DA6
Air Pilot-Operated Regulating Valve -- 1" HDA1
Air Pilot-Operated Regulating Valve -- 1" HDA4
Air Pilot-Operated Regulating Valve -- 1" HDA6
Air Pilot-Operated Regulating Valve -- 1/2" DA1
Air Pilot-Operated Regulating Valve -- 1/2" DA4
Air Pilot-Operated Regulating Valve -- 1/2" DA6
Air Pilot-Operated Regulating Valve -- 1/2" HDA1
Air Pilot-Operated Regulating Valve -- 1/2" HDA4
Air Pilot-Operated Regulating Valve -- 1/2" HDA6
Air Pilot-Operated Regulating Valve -- 2 1/2" DA1
Air Pilot-Operated Regulating Valve -- 2 1/2" DA4
Air Pilot-Operated Regulating Valve -- 2 1/2" DA6
Air Pilot-Operated Regulating Valve -- 2 1/2" HDA1
Air Pilot-Operated Regulating Valve -- 2 1/2" HDA4
Air Pilot-Operated Regulating Valve -- 2 1/2" HDA6
Air Pilot-Operated Regulating Valve -- 2" DA1
Air Pilot-Operated Regulating Valve -- 2" DA4
Air Pilot-Operated Regulating Valve -- 2" DA6
Air Pilot-Operated Regulating Valve -- 2" HDA1
Air Pilot-Operated Regulating Valve -- 2" HDA4
Air Pilot-Operated Regulating Valve -- 2" HDA6
Air Pilot-Operated Regulating Valve -- 3" DA1
Air Pilot-Operated Regulating Valve -- 3" DA4
Air Pilot-Operated Regulating Valve -- 3" DA6
Air Pilot-Operated Regulating Valve -- 3" HDA1
Air Pilot-Operated Regulating Valve -- 3" HDA4
Air Pilot-Operated Regulating Valve -- 3" HDA6
Air Pilot-Operated Regulating Valve -- 3/4" DA1
Air Pilot-Operated Regulating Valve -- 3/4" DA4
Air Pilot-Operated Regulating Valve -- 3/4" DA6
Air Pilot-Operated Regulating Valve -- 3/4" HDA1
Air Pilot-Operated Regulating Valve -- 3/4" HDA4
Air Pilot-Operated Regulating Valve -- 3/4" HDA6
Air Pilot-Operated Regulating Valve -- 4" HDA1
Air Pilot-Operated Regulating Valve -- 4" HDA4
Air Pilot-Operated Regulating Valve -- 4" HDA6
Air Pilot-Operated Regulating Valve -- 6" HDA1
Air Pilot-Operated Regulating Valve -- 6" HDA4
Air Pilot-Operated Regulating Valve -- 6" HDA6
The HD or D Regulator with the “A” Air Pilot is used for reducing steam pressure on steam mains and process equipment. The “A” Air Pilot can also be used...

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