Electric Drain Valves | McMaster-Carr

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35 Products

Timer-Actuated Compressed Air Drain Valves


Brass Housing—IP65, NEMA 4 Enclosure Rating	Brass Housing—NEMA 1 Enclosure Rating	Brass Housing—NEMA 4X Enclosure Rating

Set the electronic timer on these drain valves to open automatically at your specified time interval. They’re excellent for compressed air systems with high oil content because they resist clogging when water, oil, and sediment combine to form sludge. Install drain valves after separators, dryers, filters, and aftercoolers to collect and remove water from your air line.

NEMA 4 Enclosure Rating—Drain valves that meet NEMA 4 are rated for protection from dirt and washdowns.

NEMA 4X Enclosure Rating—Drain valves that meet NEMA 4X are rated for protection from dirt, washdowns, and corrosion.

Strainers—Install strainers before drain valves to prevent damage from debris in your pipeline.

	Drain Valves																		Strainers
	Inlet			Outlet						Overall
	Pipe Size	Thread Type	Gender	Connection	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Cycle Interval Time, min.	Drain Time, sec.	Max. Temp., ° F	Includes		Each		Each
Brass Housing—IP65, NEMA 4 Enclosure Rating







				Electric, 24V DC—Hardwire

				1/4	NPT	Female	Threaded	1/4	NPT	Female	4.5	230	4 1/2"	2"	3 1/2"	1 to 45	0.5 to 10	130	—	0000000	0000000	0000000	000000


				3/8	NPT	Female	Threaded	3/8	NPT	Female	1.2	230	4 1/2"	2"	3 1/2"	1 to 45	0.5 to 10	130	—	0000000	000000	0000000	00000
				1/2	NPT	Female	Threaded	1/2	NPT	Female	4.5	230	4 1/2"	2"	3 1/2"	1 to 45	0.5 to 10	130	—	0000000	000000	0000000	00000




						Electric, 120V AC—3-Blade Plug

						1/4	NPT	Female	Threaded	1/4	NPT	Female	4.8	230	4 1/4"	1 3/4"	3 1/2"	1 to 45	0.5 to 10	130	—	0000000	000000	0000000	00000


						1/4	NPT	Female	Threaded	1/4	NPT	Female	15	300	4 5/8"	2 1/2"	3 5/8"	1 to 45	0.5 to 10	130	—	0000000	000000	0000000	00000
						3/8	NPT	Female	Threaded	3/8	NPT	Female	7	230	4 1/4"	1 3/4"	3 1/2"	1 to 45	0.5 to 10	130	—	0000000	000000	0000000	00000
						3/8	NPT	Female	Threaded	3/8	NPT	Female	19	300	4 5/8"	2 1/2"	3 5/8"	1 to 45	0.5 to 10	130	—	0000000	000000	0000000	00000
						1/2	NPT	Female	Threaded	1/2	NPT	Female	7	230	4 1/4"	1 3/4"	3 1/2"	1 to 45	0.5 to 10	130	—	0000000	000000	0000000	00000
						1/2	NPT	Female	Threaded	1/2	NPT	Female	15	300	4 5/8"	2 1/2"	3 5/8"	1 to 45	0.5 to 10	130	—	0000000	000000	0000000	00000


						Brass Housing—NEMA 1 Enclosure Rating







										Electric, 120V AC—3-Blade Plug

										1/4	NPT	Female	Threaded	1/4	NPT	Female	1.2	200	3 1/4"	4"	4 1/4"	1 to 60	1 to 30	120	—	0000000	000000	0000000	00000


										Brass Housing—NEMA 4X Enclosure Rating







														Electric, 120V AC—3-Blade Plug

														1/4	NPT	Female	Threaded	1/4	NPT	Female	2.9	200	4 1/8"	6"	3 3/4"	0 to 50	1 to 15	180	Strainer	0000000	000000	———	0


														1/2	NPT	Female	Threaded	1/2	NPT	Female	6	300	4"	6"	3 3/4"	0 to 50	1 to 15	180	Strainer	00000000	000000	———	0




																Electric, 240V AC—Hardwire

																1/4	NPT	Female	Threaded	1/4	NPT	Female	2.9	200	4 1/8"	6"	3 3/4"	0 to 50	1 to 15	180	Strainer	0000000	000000	———	0

Replacement Filter Mesh

		Each
Replacement Filter Screens for Strainers	0000000	00000

Timer-Actuated Compressed Air Drain Valves with Digital Display

Use the digital display to set these valves to open automatically at precise intervals. They’re excellent for compressed air systems with high oil content because they resist clogging when water, oil, and sediment combine to form sludge. Install drain valves after separators, dryers, filters, and aftercoolers to collect and remove water from your air line. They meet NEMA 4 for protection from dirt and washdowns.

Strainers—Install strainers before drain valves to prevent damage from debris in your pipeline.

	Drain Valves																		Strainers
	Inlet			Outlet						Overall
	Pipe Size	Thread Type	Gender	Connection	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Cycle Interval Time, hr.	Drain Time, hr.	Digital Display Type	Max. Temp., ° F		Each		Each
Brass Housing with Digital Display—IP65 and NEMA 4 Enclosure Rating







				Electric, 120V AC—3-Blade Plug

				1/4	NPT	Female	Threaded	1/4	NPT	Female	7	230	3 3/4"	1 3/4"	3 1/2"	0 to 99	0 to 99	LED	130	000000	0000000	0000000	000000


				3/8	NPT	Female	Threaded	3/8	NPT	Female	7	230	3 3/4"	1 3/4"	3 1/2"	0 to 99	0 to 99	LED	130	000000	000000	0000000	00000
				1/2	NPT	Female	Threaded	1/2	NPT	Female	7	230	3 3/4"	1 3/4"	3 1/2"	0 to 99	0 to 99	LED	130	000000	000000	0000000	00000

Replacement Filter Mesh

		Each
Replacement Filter Screens for Strainers	0000000	00000

High-Pressure Timer-Actuated Compressed Air Drain Valves


Brass Housing—IP65, NEMA 4 Enclosure Rating, 600 psi Maximum Pressure	Brass Housing—IP65, NEMA 4 Enclosure Rating, 1,200 psi Maximum Pressure	Bronze Housing—NEMA 4X Enclosure Rating	316 Stainless Steel Housing—NEMA 4X Enclosure Rating

These withstand at least double the pressure of our other timer-operated drain valves. Set the electronic timer to open automatically at your specified time interval. These drain valves are excellent for compressed air systems with high oil content because they resist clogging when water, oil, and sediment combine to form sludge. Install drain valves after separators, dryers, filters, and aftercoolers to collect and remove water from your air line.

NEMA 4 Enclosure Rating—Drain valves that meet NEMA 4 are rated for protection from dirt and washdowns.

NEMA 4X Enclosure Rating—Drain valves that meet NEMA 4X are rated for protection from dirt, washdowns, and corrosion.

Strainers—Install strainers before drain valves to prevent damage from debris in your pipeline.

	Drain Valves																	Strainers
	Inlet			Outlet						Overall
	Pipe Size	Thread Type	Gender	Connection	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Ht.	Wd.	Dp.	Cycle Interval Time	Drain Time	Max. Temp., ° F		Each		Each
Brass Housing—IP65, NEMA 4 Enclosure Rating







				Electric, 120V AC—3-Blade Plug

				1/4	NPT	Female	Threaded	1/4	NPT	Female	3	1,200	4 1/2"	2"	3 3/8"	1 min. to 45 min.	0.5 sec. to 10 sec.	130	0000000	0000000	———	0


				3/8	NPT	Female	Threaded	3/8	NPT	Female	4	1,200	4 1/2"	2"	3 3/4"	1 min. to 45 min.	0.5 sec. to 10 sec.	130	0000000	000000	———	0
				1/2	NPT	Female	Threaded	1/2	NPT	Female	3	1,200	4 1/2"	2"	3 3/8"	1 min. to 45 min.	0.5 sec. to 10 sec.	130	0000000	000000	———	0
				1/2	NPT	Female	Threaded	1/2	NPT	Female	18	600	6"	6 3/8"	3"	1 hr. to 24 hr.	12 sec., 1 min. to 15 min.	140	00000000	000000	———	0


				Bronze Housing—NEMA 4X Enclosure Rating







								Electric, 120V AC—3-Blade Plug

								1/2	NPT	Female	Threaded	1/2	NPT	Female	1.25	600	7"	7 5/8"	4"	1 min. to 50 min.	12 sec.	180	00000000	000000	0000000	000000


								3/4	NPT	Female	Threaded	3/4	NPT	Female	2.5	600	7 1/2"	7 5/8"	4"	1 min. to 50 min.	12 sec.	180	00000000	000000	———	0
								1	NPT	Female	Threaded	1	NPT	Female	4.3	600	7 3/4"	7 5/8"	4"	1 min. to 50 min.	12 sec.	180	00000000	000000	———	0


								316 Stainless Steel Housing—NEMA 4X Enclosure Rating







												Electric, 120V AC—3-Blade Plug

												1/2	NPT	Female	Threaded	1/2	NPT	Female	1.25	2,000	7"	7 5/8"	4"	1 min. to 50 min.	12 sec.	180	00000000	000000	———	0


												3/4	NPT	Female	Threaded	3/4	NPT	Female	2.5	2,000	7 1/2"	7 5/8"	4"	1 min. to 50 min.	12 sec.	180	00000000	000000	———	0
												1	NPT	Female	Threaded	1	NPT	Female	4.3	600	7 3/4"	7 5/8"	4"	1 min. to 50 min.	12 sec.	180	00000000	000000	———	0

Replacement Filter Mesh

		Each
Replacement Filter Screens for Strainers	0000000	00000

Energy-Saving Compressed Air Drain Valves


Air Powered—1 gpm Discharge Capacity	Air Powered—1.5 gpm Discharge Capacity	Air Powered—3.5 gpm Discharge Capacity

Electric—0.2 gpm Discharge Capacity	Electric—2.9 gpm Discharge Capacity

Save energy by minimizing the loss of compressed air. Unlike other drain valves, these only open when they're full. They close before the reservoir is completely empty, so no air escapes from the system. Install them at low points in your air line after separators, dryers, filters, and aftercoolers.

Air Powered—Air-powered valves don’t need to be plugged into an electrical outlet. When water raises the float to a set point, these valves open. They have a simple internal design and large openings to prevent clogs.

Electric—Electric valves have a sensor. When condensate inside the valve rises to the level of the sensor, the valve opens to drain. Valves detect when they’re blocked—they automatically open and close to attempt to remove the blockage and sound an alarm if they’re still blocked.

1/8 Pipe Size Air Pilot and 1/4 Pipe Size Air Pilot—Drain valves with an air pilot require an additional line of air to operate. Install a 5-micron particle filter (sold separately) before the 1- and 3.5-gpm capacity valves.

Contact for Remote Signaling Device—Drain valves with a contact for remote signaling device can be wired to activate a remote alarm if blocked.

	Inlet			Outlet							Air Pilot			Overall
	Pipe Size	Thread Type	Gender	Connection	For Tube ID	Pipe Size	Thread Type	Gender	Discharge Cap., gpm	Max. Pressure, psi	Pipe Size	Thread Type	Gender	Ht.	Wd.	Dp.	Max. Temp., ° F	Features		Each
Aluminum Housing







				Air Powered

				1/2	NPT	Female	Threaded	—	1/2	NPT	Female	1	200	1/8	NPT	Female	7 3/8"	8 1/4"	5 7/8"	130	Resevoir Window	0000000	0000000


				1/2	NPT	Female	Threaded	—	1/2	NPT	Female	1.5	170	1/4	NPT	Female	11"	9 1/4"	10 1/2"	130	Clear Resevoir, Particle Filter	0000000	00000000
				3/4	NPT	Female	Threaded	—	1/2	NPT	Female	3.5	250	1/8	NPT	Female	8 1/2"	13 5/8"	9 1/8"	180	Clear Resevoir	0000000	00000000




						Electric, 120V AC—Hardwire

						1/2	NPT	Female	Barbed	1/4"	—	—	Male	0.2	230	—	—	—	2 7/8"	4 7/8"	3 5/8"	120	Alarm	0000000	000000




								Electric, 120V AC—3-Blade Plug

								1/2	NPT	Female	Barbed	3/8"	1/4	NPT	Male	2.9	230	—	—	—	4 1/2"	3 3/8"	7"	120	Alarm, Contact for Remote Signaling Device	0000000	000000