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52 Products

316 Stainless Steel Air-Powered Double Diaphragm Pumps for Chemicals, Fuel, and Flammable Liquids

With a 316 stainless steel housing and a PTFE diaphragm, these pumps resist a variety of acids, alkalies, and flammable liquids such as phosphoric acid, acetone, and methyl ethyl ketone (MEK). They're designed for moving large volumes of thick sludges and slurries in demanding environments. Pumps are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber. All are submersible and can run dry.

Threaded Bottom Intake and Threaded Top Discharge

Image of Product. Front orientation. Double Diaphragm Pumps. 316 Stainless Steel Air-Powered Double Diaphragm Pumps for Chemicals, Fuel, and Flammable Liquids, Threaded Bottom Intake and Threaded Top Discharge.

Air Motor Pump Repair Kits—Air-motor repair kits include seals, O-rings, gaskets, retaining rings, and an air valve spool.

Fluid Side Pump Repair Kits—Fluid-side repair kits include diaphragms, check valve balls, and seals.

	Double Diaphragm Pumps															Air Motor Pump Repair Kits		Fluid Side Pump Repair Kits
		Max. Flow Rate, gpm									Overall
	Max. Flow Rate, gpm	@ 80 ft. of Head	@ 120 ft. of Head	@ 160 ft. of Head	Max. Solids Dia.	Max. Viscosity, cP	Air Consumption, ft³/min	Air Connection Size	Intake Size	Discharge Size	Lg.	Wd.	Ht.		Each		Each		Each
289 ft. Maximum Feet of Head—125 psi Maximum Discharge Pressure



		15	12	10	7	1/8"	10,000	20	1/4 Female NPT	1/2 Female NPT	1/2 Female NPT	9"	10"	10"	41655K27	000000000	9948K58	0000000	3781K52	0000000


		45	38	30	19	1/4"	20,000	40	1/2 Female NPT	1 Female NPT	1 Female NPT	13"	10"	13"	41655K28	00000000	3781K68	000000	3781K47	000000
		106	77	62	45	1/4"	30,000	50	3/4 Female NPT	1 1/2 Female NPT	1 1/2 Female NPT	15"	17"	22"	41655K29	00000000	3781K63	000000	3781K44	00000000
		150	104	76	53	1/4"	40,000	100	3/4 Female NPT	2 Female NPT	2 Female NPT	15"	17"	26"	41655K31	00000000	3781K63	000000	3781K19	00000000
		235	174	127	90	3/8"	50,000	140	3/4 Female NPT	3 Female NPT	3 Female NPT	17"	20"	32"	41655K32	000000000	3781K63	000000	3781K39	00000000

316 Stainless Steel Air-Powered Double Diaphragm Pumps for Oil, Chemicals, Fuel, and Large Solids

With a 316 stainless steel housing and a fluoroelastomer diaphragm, these pumps resist a variety of harsh acids and alkalies, such as phosphoric acid, nitric acid, and sulfuric acid. They have large internal pathways and check valves with flaps to accommodate thick sewage, abrasive slurries, and industrial waste with large solids that would damage standard air-powered double diaphragm pumps. All are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber. Pumps are submersible and can run dry.

Threaded Top Intake and Threaded Bottom Discharge

Image of Product. Front orientation. Double Diaphragm Pumps. 316 Stainless Steel Air-Powered Double Diaphragm Pumps for Oil, Chemicals, Fuel, and Large Solids, Threaded Top Intake and Threaded Bottom Discharge.

Air Motor Pump Repair Kits—Air-motor repair kits include seals, O-rings, gaskets, retaining rings, and an air valve spool.

Fluid Side Pump Repair Kits—Fluid-side repair kits include diaphragms, check valve balls, and seals.

	Double Diaphragm Pumps															Air Motor Pump Repair Kits		Fluid Side Pump Repair Kits
		Max. Flow Rate, gpm									Overall
	Max. Flow Rate, gpm	@ 80 ft. of Head	@ 120 ft. of Head	@ 160 ft. of Head	Max. Solids Dia.	Max. Viscosity	Air Consumption, ft³/min	Air Connection Size	Intake Size	Discharge Size	Lg.	Wd.	Ht.		Each		Each		Each
289 ft. Maximum Feet of Head—125 psi Maximum Discharge Pressure



		70	47	35	20	1"	Not Rated	50	1/2 Female NPT	1 Female NPT	1 Female NPT	11"	17"	16"	2785K63	000000000	3781K58	0000000	8090K42	000000000

Aluminum Air-Powered Double Diaphragm Pumps for Fuel, Oil, and Large Solids

The fluoroelastomer diaphragm withstands higher temperatures than a neoprene diaphragm and has better resistance to fuel such as gasoline and kerosene. These pumps have large internal pathways and check valves with flaps to accommodate thick sewage, abrasive slurries, and industrial waste with large solids that would damage standard air-powered double diaphragm pumps. All are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber. Pumps are submersible and can run dry.

Threaded Top Intake and Threaded Bottom Discharge


70 gpm Maximum Flow Rate	140 gpm Maximum Flow Rate

Air Motor Pump Repair Kits—Air-motor repair kits include seals, O-rings, gaskets, retaining rings, and an air valve spool.

Fluid Side Pump Repair Kits—Fluid-side repair kits include diaphragms, check valve balls, and seals.

	Double Diaphragm Pumps															Air Motor Pump Repair Kits		Fluid Side Pump Repair Kits
		Max. Flow Rate, gpm									Overall
	Max. Flow Rate, gpm	@ 80 ft. of Head	@ 120 ft. of Head	@ 160 ft. of Head	Max. Solids Dia.	Max. Viscosity	Air Consumption, ft³/min	Air Connection Size	Intake Size	Discharge Size	Lg.	Wd.	Ht.		Each		Each		Each
289 ft. Maximum Feet of Head—125 psi Maximum Discharge Pressure



		70	47	35	20	1"	Not Rated	50	1/2 Female NPT	1 Female NPT	1 Female NPT	11"	17"	16"	8090K13	000000000	3781K58	0000000	8090K42	000000000


		140	120	96	77	2"	Not Rated	150	3/4 Female NPT	2 Female NPT	2 Female NPT	14"	22"	20"	8090K25	00000000	3781K57	000000	3781K16	00000000

Aluminum Air-Powered Double Diaphragm Pumps for Oil and Chemicals

A neoprene diaphragm resists oil and chemicals such as isopropyl alcohol and deionized water. These pumps have a rugged aluminum housing for moving large volumes of thick sludges and slurries in demanding environments. Pumps are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber. All are submersible and can run dry.

Threaded Bottom Intake and Threaded Top Discharge

Image of Product. Front orientation. Double Diaphragm Pumps. Aluminum Air-Powered Double Diaphragm Pumps for Oil and Chemicals, Threaded Bottom Intake and Threaded Top Discharge.

Air Motor Pump Repair Kits—Air-motor repair kits include seals, O-rings, gaskets, retaining rings, and an air valve spool.

Fluid Side Pump Repair Kits—Fluid-side repair kits include diaphragms, check valve balls, and seals.

	Double Diaphragm Pumps															Air Motor Pump Repair Kits		Fluid Side Pump Repair Kits
		Max. Flow Rate, gpm									Overall
	Max. Flow Rate, gpm	@ 80 ft. of Head	@ 120 ft. of Head	@ 160 ft. of Head	Max. Solids Dia.	Max. Viscosity, cP	Air Consumption, ft³/min	Air Connection Size	Intake Size	Discharge Size	Lg.	Wd.	Ht.		Each		Each		Each
289 ft. Maximum Feet of Head—125 psi Maximum Discharge Pressure



		15	12	10	7	1/8"	10,000	20	1/4 Female NPT	1/2 Female NPT	1/2 Female NPT	9"	10"	12"	9948K27	000000000	9948K58	0000000	———	0


		45	38	30	19	1/4"	20,000	40	1/2 Female NPT	1 Female NPT	1 Female NPT	13"	10"	13"	9948K18	00000000	3781K68	000000	3781K46	0000000
		106	77	62	45	1/4"	30,000	50	3/4 Female NPT	1 1/2 Female NPT	1 1/2 Female NPT	15"	17"	22"	9948K22	00000000	3781K63	000000	3781K43	000000
		235	174	127	90	3/8"	50,000	140	3/4 Female NPT	3 Female NPT	3 Female NPT	17"	20"	32"	9948K26	00000000	3781K63	000000	3781K38	00000000

Aluminum Air-Powered Double Diaphragm Pumps for Oil, Chemicals, and Fuel

These pumps have a PTFE diaphragm compatible with oil, fuel, and chemicals such as mineral spirits, methyl ethyl ketone (MEK), and xylene. They have a rugged aluminum housing for moving large volumes of thick sludges and slurries in demanding environments. Pumps are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber. All are submersible and can run dry.

Threaded Bottom Intake and Threaded Top Discharge

Image of Product. Front orientation. Double Diaphragm Pumps. Aluminum Air-Powered Double Diaphragm Pumps for Oil, Chemicals, and Fuel, Threaded Bottom Intake and Threaded Top Discharge.

Air Motor Pump Repair Kits—Air-motor repair kits include seals, O-rings, gaskets, retaining rings, and an air valve spool.

Fluid Side Pump Repair Kits—Fluid-side repair kits include diaphragms, check valve balls, and seals.

	Double Diaphragm Pumps															Air Motor Pump Repair Kits		Fluid Side Pump Repair Kits
		Max. Flow Rate, gpm									Overall
	Max. Flow Rate, gpm	@ 80 ft. of Head	@ 120 ft. of Head	@ 160 ft. of Head	Max. Solids Dia.	Max. Viscosity, cP	Air Consumption, ft³/min	Air Connection Size	Intake Size	Discharge Size	Lg.	Wd.	Ht.		Each		Each		Each
289 ft. Maximum Feet of Head—125 psi Maximum Discharge Pressure



		15	12	10	7	1/8"	10,000	20	1/4 Female NPT	1/2 Female NPT, 1/2 Female NPT	1/2 Female NPT, 1/2 Female NPT	9"	10"	12"	9948K16	000000000	9948K58	0000000	3781K52	0000000


		45	38	30	19	1/4"	20,000	40	1/2 Female NPT	1 Female NPT	1 Female NPT	13"	10"	13"	9948K19	00000000	3781K68	000000	3781K47	000000
		106	77	62	45	1/4"	30,000	50	3/4 Female NPT	1 1/2 Female NPT	1 1/2 Female NPT	15"	17"	22"	9948K21	00000000	3781K63	000000	3781K44	00000000
		150	104	76	53	1/4"	40,000	100	3/4 Female NPT	2 Female NPT	2 Female NPT	15"	17"	26"	9948K23	00000000	3781K63	000000	3781K19	00000000
		235	174	127	90	3/8"	50,000	140	3/4 Female NPT	3 Female NPT	3 Female NPT	17"	20"	32"	9948K24	00000000	3781K63	000000	3781K39	00000000

Aluminum Air-Powered Double Diaphragm Pumps for Oil, Chemicals, and Large Solids

A neoprene diaphragm stands up to oil and chemicals such as isopropyl alcohol and deionized water. These pumps have large internal pathways and check valves with flaps to accommodate thick sewage, abrasive slurries, and industrial waste with large solids that would damage standard air-powered double diaphragm pumps. Pumps are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber. All are submersible and can run dry.

Threaded Top Intake and Threaded Bottom Discharge


70 gpm Maximum Flow Rate	140 gpm Maximum Flow Rate

Air Motor Pump Repair Kits—Air-motor repair kits include seals, O-rings, gaskets, retaining rings, and an air valve spool.

Fluid Side Pump Repair Kits—Fluid-side repair kits include diaphragms, check valve balls, and seals.

	Double Diaphragm Pumps															Air Motor Pump Repair Kits		Fluid Side Pump Repair Kits
		Max. Flow Rate, gpm									Overall
	Max. Flow Rate, gpm	@ 80 ft. of Head	@ 120 ft. of Head	@ 160 ft. of Head	Max. Solids Dia.	Max. Viscosity	Air Consumption, ft³/min	Air Connection Size	Intake Size	Discharge Size	Lg.	Wd.	Ht.		Each		Each		Each
289 ft. Maximum Feet of Head—125 psi Maximum Discharge Pressure



		70	47	35	20	1"	Not Rated	50	1/2 Female NPT	1 Female NPT	1 Female NPT	11"	17"	16"	8090K11	000000000	3781K58	0000000	8090K41	0000000


		140	120	96	77	2"	Not Rated	150	3/4 Female NPT	2 Female NPT	2 Female NPT	14"	22"	20"	8090K22	00000000	3781K57	000000	3781K17	000000

Flanged Top Intake and Flanged Bottom Discharge

Image of Product. Front orientation. Double Diaphragm Pumps. Aluminum Air-Powered Double Diaphragm Pumps for Oil, Chemicals, and Large Solids, Flanged Top Intake and Flanged Bottom Discharge, 260 gpm Maximum Flow Rate.

260 gpm Maximum Flow Rate

Air Motor Pump Repair Kits—Air-motor repair kits include seals, O-rings, gaskets, retaining rings, and an air valve spool.

Fluid Side Pump Repair Kits—Fluid-side repair kits include diaphragms, check valve balls, and seals.

	Double Diaphragm Pumps																				Air Motor Pump Repair Kits		Fluid Side Pump Repair Kits
		Max. Flow Rate, gpm									Flange			Bolt		Overall
	Max. Flow Rate, gpm	@ 80 ft. of Head	@ 120 ft. of Head	@ 160 ft. of Head	Max. Solids Dia.	Max. Viscosity	Air Consumption, ft³/min	Air Connection Size	Intake Size	Discharge Size	OD	Thk.	Pressure Class	Circle Dia.	Hole Dia.	Lg.	Wd.	Ht.		Each		Each		Each
289 ft. Maximum Feet of Head—125 psi Maximum Discharge Pressure



		260	178	150	118	3"	Not Rated	120	3/4 Female NPT	3	3	7 1/2"	7/8"	150	6"	5/8"	16"	37"	30"	8090K33	000000000	3781K57	0000000	3781K22	000000000

Plastic Air-Powered Double Diaphragm Pumps for Oil

A Buna-N diaphragm stands up to lubricating oil such as motor oil. These pumps are designed to handle thick sludges and slurries. They have a chemical-resistant polypropylene housing. Pumps are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber. All are submersible and can run dry.

Threaded Bottom Intake and Threaded Top Discharge

Image of Product. Front orientation. Double Diaphragm Pumps. Plastic Air-Powered Double Diaphragm Pumps for Oil, Threaded Bottom Intake and Threaded Top Discharge.

Air Motor Pump Repair Kits—Air-motor repair kits include seals, O-rings, gaskets, retaining rings, and an air valve spool.

Fluid Side Pump Repair Kits—Fluid-side repair kits include diaphragms, check valve balls, and seals.

	Double Diaphragm Pumps															Air Motor Pump Repair Kits		Fluid Side Pump Repair Kits
		Max. Flow Rate, gpm									Overall
	Max. Flow Rate, gpm	@ 40 ft. of Head	@ 120 ft. of Head	@ 160 ft. of Head	Max. Solids Dia.	Max. Viscosity, cP	Air Consumption, ft³/min	Air Connection Size	Intake Size	Discharge Size	Lg.	Wd.	Ht.		Each		Each		Each
231 ft. Maximum Feet of Head—100 psi Maximum Discharge Pressure



		14	12	8	5	1/8"	10,000	16	1/4 Female NPT	1/2 Female NPT, 1 Male NPT	1/2 Female NPT, 1 Male NPT	7"	10"	12"	4157K133	000000000	3781K72	0000000	3781K96	0000000


		23	19	13	8	5/32"	10,000	20	1/4 Female NPT	3/4 Female NPT, 1 1/2 Male NPT	3/4 Female NPT, 1 1/2 Male NPT	7"	12"	13"	4157K134	00000000	3781K72	000000	3781K73	000000

PTFE Air-Powered Double Diaphragm Pumps for Harsh Chemicals

With all PTFE wetted parts, these pumps offer the best chemical resistance of all our air-powered double diaphragm pumps and can handle solvents and petroleum-based fluids that PVDF pumps can’t. Pumps are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber. All can run dry.

Threaded Side Intake and Threaded Side Discharge

Image of Product. Front orientation. Double Diaphragm Pumps. PTFE Air-Powered Double Diaphragm Pumps for Harsh Chemicals, Threaded Side Intake and Threaded Side Discharge.

Air Motor Pump Repair Kits—Air-motor repair kits include seals, O-rings, gaskets, retaining rings, and an air valve spool.

Fluid Side Pump Repair Kits—Fluid-side repair kits include diaphragms, check valve balls, and seals.

	Double Diaphragm Pumps											Air Motor Pump Repair Kits		Fluid Side Pump Repair Kits
							Overall
	Max. Flow Rate, gpm	Max. Solids Dia.	Air Consumption, ft³/min	Air Connection Size	Intake Size	Discharge Size	Lg.	Wd.	Ht.		Each		Each		Each
231 ft. Maximum Feet of Head—100 psi Maximum Discharge Pressure



		6.7	0.08"	9.3	1/8 Female NPT	3/8 Female NPT	3/8 Female NPT	3 1/2"	5 7/8"	7 5/8"	2925N2	000000000	2666N29	0000000	2666N22	0000000


		16	0.16"	29	1/4 Female NPT	1/2 Female NPT	1/2 Female NPT	6"	9 3/16"	8"	2925N3	00000000	2666N31	000000	2666N23	00000000
		39	0.24"	46	1/4 Female NPT	1 Female NPT	1 Female NPT	8"	10 7/8"	10 3/8"	2925N4	00000000	2666N32	000000	2666N24	00000000