Watson McDaniel Company Datasheets for Industrial Valves

Valves are mechanical devices that control the flow and pressure of liquids, gases, and slurries within a system. They are also known as regulators and are used in a wide variety of applications. Valves vary greatly in size, design, function, and operation.
Industrial 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...
Back Pressure Pilot -- BP 10-25
Back Pressure Pilot -- BP 20-100
Back Pressure Pilot -- BP 80-200
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 The “BP” Back-Pressure Pilot used...
Back Pressure Relief Valve -- 1 1/2" 3040 Series 20-70
Back Pressure Relief Valve -- 1 1/2" 3040 Series 40-125
Back Pressure Relief Valve -- 1 1/2" 3040 Series 5-35
Back Pressure Relief Valve -- 1 1/4" 3040 Series 20-70
Back Pressure Relief Valve -- 1 1/4" 3040 Series 40-125
Back Pressure Relief Valve -- 1 1/4" 3040 Series 5-35
Back Pressure Relief Valve -- 1" 3040 Series 1-12
Back Pressure Relief Valve -- 1" 3040 Series 20-70
Back Pressure Relief Valve -- 1" 3040 Series 40-125
Back Pressure Relief Valve -- 1" 3040 Series 5-35
Back Pressure Relief Valve -- 1/2" 3040 Series 1-12
Back Pressure Relief Valve -- 1/2" 3040 Series 20-70
Back Pressure Relief Valve -- 1/2" 3040 Series 40-125
Back Pressure Relief Valve -- 1/2" 3040 Series 5-35
Back Pressure Relief Valve -- 2" 3040 Series 20-70
Back Pressure Relief Valve -- 2" 3040 Series 40-125
Back Pressure Relief Valve -- 2" 3040 Series 5-35
Back Pressure Relief Valve -- 3/4" 3040 Series 1-12
Back Pressure Relief Valve -- 3/4" 3040 Series 20-70
Back Pressure Relief Valve -- 3/4" 3040 Series 40-125
Back Pressure Relief Valve -- 3/4" 3040 Series 5-35
The 3040 Series Back Pressure Valves relieve upstream pressure in a variety of processes. Automatically maintains desired maximum pressure in a vessel or system by relieving excess pressure into lower...
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
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...
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...
Pilot-Operated Pressure Regulating Valve -- 1 1/2" DP
Pilot-Operated Pressure Regulating Valve -- 1 1/2" DP5
Pilot-Operated Pressure Regulating Valve -- 1 1/2" HDP
Pilot-Operated Pressure Regulating Valve -- 1 1/2" HDP5
Pilot-Operated Pressure Regulating Valve -- 1 1/4" DP
Pilot-Operated Pressure Regulating Valve -- 1 1/4" DP5
Pilot-Operated Pressure Regulating Valve -- 1 1/4" HDP
Pilot-Operated Pressure Regulating Valve -- 1 1/4" HDP5
Pilot-Operated Pressure Regulating Valve -- 1" DP
Pilot-Operated Pressure Regulating Valve -- 1" DP5
Pilot-Operated Pressure Regulating Valve -- 1" HDP
Pilot-Operated Pressure Regulating Valve -- 1" HDP5
Pilot-Operated Pressure Regulating Valve -- 1/2" DP
Pilot-Operated Pressure Regulating Valve -- 1/2" DP5
Pilot-Operated Pressure Regulating Valve -- 1/2" HDP
Pilot-Operated Pressure Regulating Valve -- 1/2" HDP5
Pilot-Operated Pressure Regulating Valve -- 2 1/2" DP
Pilot-Operated Pressure Regulating Valve -- 2 1/2" DP5
Pilot-Operated Pressure Regulating Valve -- 2 1/2" HDP
Pilot-Operated Pressure Regulating Valve -- 2 1/2" HDP5
Pilot-Operated Pressure Regulating Valve -- 2" DP
Pilot-Operated Pressure Regulating Valve -- 2" DP5
Pilot-Operated Pressure Regulating Valve -- 2" HDP
Pilot-Operated Pressure Regulating Valve -- 2" HDP5
Pilot-Operated Pressure Regulating Valve -- 3" DP
Pilot-Operated Pressure Regulating Valve -- 3" DP5
Pilot-Operated Pressure Regulating Valve -- 3" HDP
Pilot-Operated Pressure Regulating Valve -- 3" HDP5
The HD or D Regulator with the “P” Pressure Pilot is used for reducing steam pressure in piping mains and process applications. Pilot-operated regulators will maintain constant downstream pressure even...
Back Pressure Relief Valve -- 1 1/2" R Series 1-6
Back Pressure Relief Valve -- 1 1/2" R Series 25-100
Back Pressure Relief Valve -- 1 1/2" R Series 5-35
Back Pressure Relief Valve -- 1 1/2" R Series 75-300
Back Pressure Relief Valve -- 1 1/4" R Series 1-6
Back Pressure Relief Valve -- 1 1/4" R Series 25-100
Back Pressure Relief Valve -- 1 1/4" R Series 5-35
Back Pressure Relief Valve -- 1 1/4" R Series 75-300
Back Pressure Relief Valve -- 1" 10691 Series 1-6
Back Pressure Relief Valve -- 1" 10691 Series 25-100
Back Pressure Relief Valve -- 1" 10691 Series 5-35
Back Pressure Relief Valve -- 1" 10691 Series 75-300
Back Pressure Relief Valve -- 1" R Series 1-6
Back Pressure Relief Valve -- 1" R Series 25-100
Back Pressure Relief Valve -- 1" R Series 5-35
Back Pressure Relief Valve -- 1" R Series 75-300
Back Pressure Relief Valve -- 1/2" 10691 Series 1-6
Back Pressure Relief Valve -- 1/2" 10691 Series 25-100
Back Pressure Relief Valve -- 1/2" 10691 Series 5-35
Back Pressure Relief Valve -- 1/2" 10691 Series 75-300
Back Pressure Relief Valve -- 1/2" R Series 1-6
Back Pressure Relief Valve -- 1/2" R Series 25-100
Back Pressure Relief Valve -- 1/2" R Series 5-35
Back Pressure Relief Valve -- 1/2" R Series 75-300
Back Pressure Relief Valve -- 2" R Series 25-100
Back Pressure Relief Valve -- 2" R Series 5-35
Back Pressure Relief Valve -- 2" R Series 75-300
Back Pressure Relief Valve -- 3" R Series 25-100
Back Pressure Relief Valve -- 3" R Series 5-35
Back Pressure Relief Valve -- 3" R Series 75-300
Back Pressure Relief Valve -- 3/4" 10691 Series 1-6
Back Pressure Relief Valve -- 3/4" 10691 Series 25-100
Back Pressure Relief Valve -- 3/4" 10691 Series 5-35
Back Pressure Relief Valve -- 3/4" 10691 Series 75-300
Back Pressure Relief Valve -- 3/4" R Series 1-6
Back Pressure Relief Valve -- 3/4" R Series 25-100
Back Pressure Relief Valve -- 3/4" R Series 5-35
Back Pressure Relief Valve -- 3/4" R Series 75-300
The R Series & 10691 Series Back Pressure Relief Valves are used in the following applications: Water pump bypass for Irrigation, sprinkler systems on golf courses, fountains, and fire protection...
Electronic Pilot -- S 0-180
Electronic Pilot -- S 180-250
Typically used for automatic operation, remote control, programmed cycling, sequential function interlocks with other equipment, and emergency shut-off in case of power failure.

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