Check Valves for Sulfuric Acid

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12 Products

About Backflow-Prevention Valves

Threaded Check Valves for Harsh Chemicals

These valves open to allow flow in one direction and close when flow stops or reverses.

Valves for drinking water meet NSF/ANSI Standard 61.

Polypropylene valves are more corrosion resistant than PVC or CPVC valves.

Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.

CPVC Plastic Body—Ball

For Use With: Air, Butane, Carbon Dioxide, Citric Acid, Deionized Water, Diesel Fuel, Drinking Water, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Mineral Spirits, Natural Gas, Nitric Acid, Oxygen, Phosphoric Acid, Propane, Salt Water, Soap Solutions, Sodium Hydroxide, Sodium Hypochlorite, Sulfuric Acid, Water
Ball Material: CPVC Plastic
Seal Material: Fluoroelastomer Rubber

NPT Female × NPT Female
Pipe Size	Flow Coefficient (Cv)	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	Color	End-to-End Lg.	Specifications Met		Each
3	250	150 psi @ 70° F	1.5	35° to 190°	Dark Gray	10 9/16"	ASTM D1784, NSF/ANSI 61	0000000	0000000
4	400	150 psi @ 70° F	1.5	35° to 190°	Dark Gray	12 15/16"	ASTM D1784, NSF/ANSI 61	0000000	00000000

Ultra-Chemical-Resistant Threaded Check Valves

Female × Female

Female × Male

Male × Female

Male × Male

For Use With: Acetone, Ammonia, Butane, Carbon Dioxide, Citric Acid, Diesel Fuel, Ethylene Glycol, Fuel Oil, Gasoline, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Methanol, Methyl Ethyl Ketone, Mineral Spirits, Natural Gas, Nitric Acid, Nitrogen, Oil, Oxygen, Phosphoric Acid, Propane, Salt Water, Soap Solutions, Sodium Hydroxide, Sodium Hypochlorite, Sulfuric Acid, Toluene, Water, Xylene
Piston Material: PTFE Plastic
Spring Material: PTFE Plastic

The most chemical-resistant check valves in our offering, these have a PFA body to withstand methyl ethyl ketone, sodium hypochlorite, and other extremely harsh chemicals. They open to allow flow in one direction and close when flow stops or reverses.

Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.

For technical drawings and 3-D models, click on a part number.

PFA Plastic Body
Pipe Size	Flow Coefficient (Cv)	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	Color	End-to-End Lg.		Each
NPT Female × NPT Female
1/4	0.75	125 psi @ 150° F	1	0° to 210°	Semi-Clear White	2 3/8"	00000000	0000000
1/2	4	100 psi @ 150° F	1	0° to 210°	Semi-Clear White	3 3/8"	00000000	000000
NPT Female × NPT Male
1/4	0.75	125 psi @ 150° F	1	0° to 210°	Semi-Clear White	2 7/16"	00000000	000000
NPT Male × NPT Female
1/4	0.75	125 psi @ 150° F	1	0° to 210°	Semi-Clear White	2 1/16"	00000000	000000
NPT Male × NPT Male
1/4	0.75	125 psi @ 150° F	1	0° to 210°	Semi-Clear White	2 7/16"	00000000	000000

Clear-View Socket-Connect Check Valves for Harsh Chemicals

For Use With: Carbon Dioxide, Citric Acid, Deionized Water, Diesel Fuel, Hydrochloric Acid, Methanol, Nitric Acid, Phosphoric Acid, Salt Water, Sulfuric Acid, Water
Piston Material: PVC Plastic
Seal Material: Fluoroelastomer Rubber

Visually inspect flow and debris accumulation through the transparent valve body. Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. Valves have a PVC body and a fluoroelastomer seal for excellent chemical resistance. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.

Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.

For technical drawings and 3-D models, click on a part number.

PVC Plastic Body
Pipe Size	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	Color	End-to-End Lg.	Features		Each
Socket Connect × Socket Connect
1/2	40, 80	6.7	150 psi @ 70° F	0.29	35° to 140°	Clear	5 5/8"	Removable Cap	0000000	000000
3/4	40, 80	11.9	150 psi @ 70° F	0.29	35° to 140°	Clear	6 5/16"	Removable Cap	0000000	00000
1	40, 80	21	150 psi @ 70° F	0.29	35° to 140°	Clear	6 7/8"	Removable Cap	0000000	000000

Check Valves with Push-to-Connect Fittings for Harsh Chemicals

For Use With: Air, Argon, Butane, Carbon Dioxide, Chlorine, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Gasoline, Helium, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Krypton, Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Phosphoric Acid, Propane, Salt Water, Soap Solutions, Sodium Hypochlorite, Sulfuric Acid, Toluene, Water, Xenon, Xylene
Piston Material: PVDF Plastic
Spring Material: Stainless Steel
Seal Material: Fluoroelastomer Rubber

Connect your outlet tubing into the push-to-connect fittings—no heat, solder, or flux required. These valves have a PVDF body and a fluoroelastomer seal for excellent chemical resistance. They open to allow flow in one direction and close when flow stops or reverses.

For technical drawings and 3-D models, click on a part number.

PVDF Plastic Body
For Tube OD	Pipe Size	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	Color	End-to-End Lg.		Each
Push-to-Connect Inlet × NPTF Male Outlet
3/8"	1/4	300 psi @ 70° F	0.5	0° to 250°	Black	1 3/8"	0000000	000000

Check Valves with Barbed Fittings for Harsh Chemicals

Diaphragm Check Valve

Prevent backflow in chemical tubing lines. These valves have barbed fittings that grip onto tubing, providing a secure hold. The plastic body and fluoroelastomer seal provide excellent chemical resistance. Valves open to allow flow in one direction and close when flow stops or reverses.

PVDF valve resists abrasion and UV light.

For technical drawings and 3-D models, click on a part number.

PVDF Plastic Body—Diaphragm

For Use With: Air, Butane, Chlorine, Citric Acid, Deionized Water, Diesel Fuel, Ethanol, Ethylene Glycol, Gasoline, Hydrochloric Acid, Nitric Acid, Oil, Propane, Salt Water, Soap Solutions, Sodium Hypochlorite, Sulfuric Acid, Water
Diaphragm Material: Fluoroelastomer Rubber
Seal Material: Fluoroelastomer Rubber

Barbed × Barbed
For Tube ID	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	Color	End-to-End Lg.		Each
1/4"	15 psi @ 70° F	0.5	-20° to 250°	White	1 21/32"	00000000	00000