Orifice Valves For Natural Gas

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Compressed Non-Asbestos Synthetic Fiber

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316/316L Stainless Steel

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316/316L Stainless Steel

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

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2B999

EAR99

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48 Products

About Measuring Fittings

Measure the threaded ends of your fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Flange Unions

Measure, throttle, and regulate the flow of liquids and gases in your line by adding an orifice plate to these unions. They consist of two flange halves, plus all of the components needed to connect them together. Tighten the jack bolts to separate the flange halves to inspect or replace the orifice plate.

To throttle flow, mount an orifice plate between the two flanges. The orifice plate restricts the flow in order to regulate it.

To measure flow, build the same assembly, except you’ll also connect a differential pressure gauge or transmitter to both flange halves using the threaded ports. Your gauge or transmitter will measure the difference between the pressure before and after the orifice plate. The pressure difference is proportional to flow rate, so you can use that measurement to calculate your line’s flow rate.

Butt Weld × Flanged


Assembled	Exploded

Butt-weld flanges are also known as weld-neck flanges; the flange neck has a beveled end that, when flush to pipe, creates a trough for a strong weld.

For 316/316L Stainless Steel Fittings—316/316L stainless steel flanges have excellent corrosion resistance.

ASME B16.36—Flanges that meet ASME B16.36 adhere to specifications and testing requirements for temperature and pressure ratings, dimensions, materials, and tolerances.

				Bolt Hole			Port							For Carbon Steel Fittings			For 316/316L Stainless Steel Fittings
Pipe Size	Construction	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Pipe Size	No. of	Includes	Specs. Met	For Use With	Temp.	Pressure Class	For Pipe Material		Each	For Pipe Material		Each
3/4	Seamless	4 5/8"	5/8"	11/16"	4	3 1/4"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	—	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N11	0000000	316/316L Stainless Steel	5291N24	0000000
1	Seamless	4 7/8"	5/8"	11/16"	4	3 1/2"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	ASME B16.36	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N12	000000	316/316L Stainless Steel	5291N25	000000
1 1/2	Seamless	6 1/8"	3/4"	13/16"	4	4 1/2"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	ASME B16.36	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N13	000000	316/316L Stainless Steel	5291N26	000000
2	Seamless	6 1/2"	5/8"	11/16"	8	5"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	ASME B16.36	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N14	000000	316/316L Stainless Steel	5291N27	000000
3	Seamless	8 1/4"	3/4"	13/16"	8	6 9/16"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	ASME B16.36	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N15	000000	316/316L Stainless Steel	5291N28	000000
4	Seamless	10"	3/4"	13/16"	8	7 7/8"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	ASME B16.36	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N16	000000	316/316L Stainless Steel	5291N29	00000000

Slip-On Weld × Flanged


Assembled	Exploded

Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.

For 316/316L Stainless Steel Fittings—316/316L stainless steel flanges have excellent corrosion resistance.

ASME B16.36—Flanges that meet ASME B16.36 adhere to specifications and testing requirements for temperature and pressure ratings, dimensions, materials, and tolerances.

			Bolt Hole			Port							For Carbon Steel Fittings			For 316/316L Stainless Steel Fittings
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Pipe Size	No. of	Includes	Specs. Met	For Use With	Temp.	Pressure Class	For Pipe Material		Each	For Pipe Material		Each
3/4	4 5/8"	5/8"	11/16"	4	3 1/4"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	—	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N17	0000000	316/316L Stainless Steel	5291N31	0000000
1	4 7/8"	5/8"	11/16"	4	3 1/2"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	ASME B16.36	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N18	000000	316/316L Stainless Steel	5291N32	000000
1 1/2	6 1/8"	3/4"	13/16"	4	4 1/2"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	ASME B16.36	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N19	000000	316/316L Stainless Steel	5291N33	000000
2	6 1/2"	5/8"	11/16"	8	5"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	ASME B16.36	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N21	000000	316/316L Stainless Steel	5291N34	000000
3	8 1/4"	3/4"	13/16"	8	6 9/16"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	ASME B16.36	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N22	000000	316/316L Stainless Steel	5291N35	00000000
4	10"	3/4"	13/16"	8	7 7/8"	1/2	2	Gaskets, Jack Bolts, Nuts, Port Plugs, Threaded Rods	ASME B16.36	Air, Natural Gas, Oil, Water	Not Rated	300	Carbon Steel	5291N23	000000	316/316L Stainless Steel	5291N36	00000000

Orifice Valves for Chemicals

Made of PVC, these orifices have excellent resistance to a wide range of corrosive chemicals. Also known as flow restrictors and precision orifice valves, they are used to throttle, vent, bleed, or regulate the flow of liquids and gases. They automatically adjust to changing inlet pressure to maintain consistent outlet flow.

PVC Body

Image of Product. Front orientation. Orifice Valves. Orifice Valves for Chemicals.

	Temp. Range, ° F	Choose an Outlet Water Flow		Each
NPT Female × NPT Female







	1/2 Pipe Size

	2 1/4"	Air, Ammonia, Beverage, Carbon Dioxide, Diesel Fuel, Ethylene Glycol, Food, Hydrochloric Acid, Kerosene, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Nitric Acid, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Water	120 psi @ 75° F	40 to 140	0.25 gpm, 0.5 gpm, 0.75 gpm, 1 gpm, 1.5 gpm, 2 gpm	2272N53	0000000




			3/4 Pipe Size

			3 1/4"	Air, Ammonia, Beverage, Carbon Dioxide, Diesel Fuel, Ethylene Glycol, Food, Hydrochloric Acid, Kerosene, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Nitric Acid, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Water	120 psi @ 75° F	40 to 140	3 gpm, 4 gpm, 5 gpm, 6 gpm, 7 gpm, 8 gpm	2272N3	000000

Barbed Orifice Valves

Insert the barbed ends of these orifices into rubber and soft plastic tubing, and secure them with a clamp. Also known as flow restrictors and precision orifice valves, they are used to throttle, vent, bleed, or regulate the flow of liquids and gases.

303 Stainless Steel Body

Barbed ×

Barbed

	Water Flow	Airflow @ Pressure	For Tube ID	Lg.	OD	For Use With	Max. Pressure @ Temp.		Each
Barbed Male × Barbed Male



	0.01"	0.016 gpm @ 40 psi	0.3 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N11	000000


	0.016"	0.035 gpm @ 40 psi	0.5 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N12	00000
	0.018"	0.046 gpm @ 40 psi	0.6 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N13	00000
	0.02"	0.056 gpm @ 40 psi	0.6 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N14	00000
	0.021"	0.061 gpm @ 40 psi	0.7 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N15	00000
	0.023"	0.076 gpm @ 40 psi	0.7 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N16	00000
	0.024"	0.082 gpm @ 40 psi	0.7 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N17	00000
	0.025"	0.089 gpm @ 40 psi	0.8 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N18	00000
	0.026"	0.101 gpm @ 40 psi	0.8 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N19	00000
	0.028"	0.114 gpm @ 40 psi	0.9 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N21	00000
	0.029"	0.12 gpm @ 40 psi	0.9 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N22	00000


	0.032"	0.152 gpm @ 40 psi	1.1 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N23	00000
	0.033"	0.158 gpm @ 40 psi	1.1 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N24	00000
	0.035"	0.177 gpm @ 40 psi	1.2 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N25	00000
	0.038"	0.202 gpm @ 40 psi	1.2 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N26	00000
	0.04"	0.228 gpm @ 40 psi	1.3 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N27	00000
	0.042"	0.247 gpm @ 40 psi	1.4 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N28	00000
	0.047"	0.304 gpm @ 40 psi	1.5 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N29	00000
	0.052"	0.373 gpm @ 40 psi	1.6 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N31	00000
	0.055"	0.43 gpm @ 40 psi	1.7 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N32	00000
	0.063"	0.557 gpm @ 40 psi	2 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N33	00000


	0.125"	2.34 gpm @ 40 psi	4 scfm @ 40 psi	1/4"	1 5/16"	7/16"	Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oil, Natural Gas, Oil, Oxygen, Steam, Water	500 psi @ 70° F	2258N34	00000