For Use With For Use With |
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Connection Location Connection Location |
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Bottom | Center Back | Lower Back |
Thread Type Thread Type |
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System of Measurement System of Measurement |
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Case Material Case Material |
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Dial Type Dial Type |
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Measures Measures |
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Connection Material Connection Material |
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Connection Style Connection Style |
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Threaded |
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Quick Clamp |
Display Type Display Type |
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![]() | Dial |
Minimum Environment Temperature Minimum EnvironmentTemperature |
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Maximum Environment Temperature Maximum EnvironmentTemperature |
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Minimum Process Temperature Minimum ProcessTemperature |
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Accuracy Scale Accuracy Scale |
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Maximum Process Temperature Maximum ProcessTemperature |
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Body Material Body Material |
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Lens Material Lens Material |
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Use these gauges with pumps, filters, regulators, and in process lines to monitor the pressure of compressed gas. Mount them with the dial face upright. Gauges for use with acetylene can also be used in welding applications.
Gauges with brass case are cleaned to meet ASME B40.1, Level IV for oxygen service.
Gauges with 304 stainless steel case are cleaned and bagged to meet ASME B40.1, Level IV for oxygen service.
For technical drawings and 3-D models, click on a part number.
Available Pressure Ranges | ||
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Pressure Range, psi | Graduation Marks, psi | Numeric Increments, psi |
0 to 30 | 1 | 5 |
0 to 60 | 1 | 10 |
0 to 100 | 2 | 20 |
0 to 200 | 5 | 40 |
0 to 400 | 10 | 50 |
0 to 600 | 10 | 100 |
0 to 1,000 | 20 | 200 |
0 to 2,000 | 50 | 400 |
0 to 3,000 | 50 | 500 |
0 to 4,000 | 100 | 500 |
Available Pressure Ranges | |||||||||
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Bottom and Center Back Connections | Lower Back Connection | ||||||||
Pressure Range | Graduation Marks | Numeric Increments | Graduation Marks | Numeric Increments | |||||
psi | kPa | psi | kPa | psi | kPa | psi | kPa | psi | kPa |
2 1/2" Dial Diameter | |||||||||
0 to 15 | 0 to 102 | 0.2 | 2 | 3 | 20 | __ | __ | __ | __ |
0 to 30 | 0 to 205 | 0.5 | 5 | 5 | 50 | __ | __ | __ | __ |
0 to 100 | 0 to 680 | 2 | 10 | 20 | 100 | __ | __ | __ | __ |
0 to 200 | 0 to 1,350 | 5 | 50 | 50 | 200 | __ | __ | __ | __ |
0 to 300 | 0 to 2,050 | 5 | 50 | 50 | 500 | __ | __ | __ | __ |
0 to 600 | 0 to 4,100 | 10 | 100 | 100 | 1,000 | __ | __ | __ | __ |
4" Dial Diameter | |||||||||
0 to 15 | 0 to 103 | 0.2 | 1 | 3 | 10 | 0.2 | 1 | 3 | 10 |
0 to 30 | 0 to 206 | 0.5 | 2 | 5 | 20 | 0.5 | 2 | 5 | 20 |
0 to 100 | 0 to 680 | 1 | 10 | 10 | 100 | 1 | 10 | 10 | 100 |
0 to 200 | 0 to 1,360 | 2 | 20 | 20 | 200 | 2 | 20 | 20 | 200 |
0 to 300 | 0 to 2,060 | 5 | 20 | 50 | 200 | 5 | 20 | 50 | 200 |
0 to 600 | 0 to 4,100 | 10 | 50 | 100 | 500 | 10 | 100 | 100 | 1,000 |
Dial Diameter | Pipe Size | Environment Temp. Range, °F | Process Temp. Range, °F | Mounting Orientation | Each | |
Bottom Connection | ||||||
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NPT Male | ||||||
2 1/2" | 1/4 | -40° to 140° | -40° to 140° | Upright | 0000000 | 000000 |
4" | 1/4 | -40° to 140° | -40° to 140° | Upright | 0000000 | 00000 |
Center Back Connection | ||||||
NPT Male | ||||||
2 1/2" | 1/4 | -40° to 140° | -40° to 140° | Upright | 0000000 | 00000 |
Lower Back Connection | ||||||
NPT Male | ||||||
4" | 1/4 | -40° to 140° | -40° to 140° | Upright | 0000000 | 00000 |
Also known as isolators or diaphragm seals, these protect gauges from corrosive process media. Fill guards with ISO Grade 32 hydraulic oil (not included) before use.
316 stainless steel guards provide excellent corrosion and chemical resistance and can handle higher temperatures and pressures than plastic guards.
Guards with drain port allow you to remove process media.
For technical drawings and 3-D models, click on a part number.
Pipe Connections | |||||||||
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Inlet | Outlet | Gasket Material | For Use With | Min. Pressure, psi | Max. Pressure | Max. Temp., °F | Ht. | Each | |
316 Stainless Steel Body | |||||||||
1/4 NPT Female | 1/4 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 1 1/2" | 0000000 | 0000000 |
1/2 NPT Female | 1/4 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 1 1/2" | 0000000 | 000000 |
1/2 NPT Female | 1/2 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 1 1/2" | 0000000 | 000000 |
316 Stainless Steel Body with 1/4 NPT Female Drain Port | |||||||||
1/4 NPT Female | 1/4 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 2" | 0000000 | 000000 |
1/2 NPT Female | 1/4 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 2" | 0000000 | 000000 |
1/2 NPT Female | 1/2 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 2" | 0000000 | 000000 |
Keeping corrosive substances from touching pressure gauges used in food-processing and pharmaceutical plants, these guards have a sanitary design. Made of 316 stainless steel, they won’t rust from frequent washdowns with harsh cleaners and sanitizers. They have continuously-welded seams and polished surfaces, so there aren’t any pits for bacteria to grow in. Removing them for cleaning and maintenance is easy thanks to their quick-clamp connection, which is sometimes called a tri-clamp.
Also known as isolators and diaphragm seals, these guards have a 316 stainless steel gasket to shield the pressure gauges from corrosion. Before use, fill the guards with fluid such as glycerin or silicone that’s suitable for food contact.
For technical drawings and 3-D models, click on a part number.
Outlet Quick-Clamp Tube Connection | |||||||||||
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Inlet Pipe Connection | For Tube OD | Flange OD | Gasket Material | For Use With | Minimum Pressure, psi | Maximum Pressure | Maximum Temperature | Height | Interior Smoothness, Ra | Each | |
316 Stainless Steel Body | |||||||||||
1/4 NPT Female | 1 1/2" | 1.984" | 316 Stainless Steel | Acetylene, Air, Ammonia, Beverage, Boric Acid, Carbon Dioxide, Diesel Fuel, Ethanol, Food, Gasoline, Hydraulic Fluid, Hydrogen, Oxygen, Pharmaceuticals, Wastewater, Water | 30 | Not Rated | Not Rated | 1 3/8" | 32 | 0000000 | 0000000 |
1/4 NPT Female | 2" | 2.516" | 316 Stainless Steel | Acetylene, Air, Ammonia, Beverage, Boric Acid, Carbon Dioxide, Diesel Fuel, Ethanol, Food, Gasoline, Hydraulic Fluid, Hydrogen, Oxygen, Pharmaceuticals, Wastewater, Water | 30 | Not Rated | Not Rated | 1 1/8" | 32 | 0000000 | 000000 |
1/2 NPT Female | 1 1/2" | 1.984" | 316 Stainless Steel | Acetylene, Air, Ammonia, Beverage, Boric Acid, Carbon Dioxide, Diesel Fuel, Ethanol, Food, Gasoline, Hydraulic Fluid, Hydrogen, Oxygen, Pharmaceuticals, Wastewater, Water | 30 | Not Rated | Not Rated | 1 3/8" | 32 | 0000000 | 000000 |
1/2 NPT Female | 2" | 2.516" | 316 Stainless Steel | Acetylene, Air, Ammonia, Beverage, Boric Acid, Carbon Dioxide, Diesel Fuel, Ethanol, Food, Gasoline, Hydraulic Fluid, Hydrogen, Oxygen, Pharmaceuticals, Wastewater, Water | 30 | Not Rated | Not Rated | 1 1/8" | 32 | 0000000 | 000000 |
These valves automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. All have Compressed Gas Association (CGA) numbered inlet fittings for secure connections to compressed gas tanks. Choose a valve with the same CGA number as your tank and other system components. Valves have a gauge to monitor outlet pressure and a gauge to monitor inlet pressure from the tank.
Choose a valve with a maximum outlet pressure that’s approximately twice your application’s normal operating pressure. Your operating pressure should never exceed 75% of the valve’s maximum outlet pressure.
Single-stage valves reduce pressure in one step, which causes the outlet pressure to fluctuate slightly as you empty the tank. They’re best for applications where a constant outlet pressure isn’t critical.
Two-stage valves progressively reduce pressure over two steps for more consistent outlet pressure at all times. They’re often used in applications that require a constant outlet pressure regardless of the tank level.
Valves with a brass body have a longer service life than valves with a brass and steel body.
Valves with a stainless steel diaphragm can withstand harsh environments.
Inlet | Outlet | Material | ||||||||||
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CGA Number | Location | Thread Direction | Pressure Gauge Range, psi | Location | Thread Direction | Pressure Range, psi | Pressure Adjustment Method | Body | Seal | Diaphragm | Each | |
For Use With Oxygen | ||||||||||||
9/16"-18 UNF Male Outlet × NGO Female Inlet | ||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Left Hand | 0 to 50 | Knob | Brass | PTFE | Neoprene | 00000000 | 0000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 50 | T-Handle | Brass | PTFE | Neoprene | 00000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 50 | T-Handle | Brass | PTFE | Stainless Steel | 00000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 125 | T-Handle | Brass | PTFE | Rubber | 0000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 125 | T-Handle | Brass | PTFE | Stainless Steel | 0000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 145 | Knob | Brass/Steel | PTFE | Rubber | 0000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 200 | T-Handle | Brass | PTFE | Rubber | 000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 200 | T-Handle | Brass | PTFE | Stainless Steel | 00000000 | 000000 |
Inlet | Outlet | Material | ||||||||||
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CGA Number | Location | Thread Direction | Pressure Gauge Range, psi | Location | Thread Direction | Pressure Range, psi | Pressure Adjustment Method | Body | Seal | Diaphragm | Each | |
For Use With Oxygen | ||||||||||||
1/4 NPT Female Outlet × NGO Female Inlet | ||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 250 | T-Handle | Brass | PTFE | Stainless Steel | 0000000 | 0000000 |
1/4 NPT Male Outlet × NGO Female Inlet | ||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 250 | T-Handle | Brass | PTFE | Neoprene | 0000000 | 000000 |
9/16"-18 UNF Male Outlet × NGO Female Inlet | ||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 50 | T-Handle | Brass | PTFE | Neoprene | 00000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 50 | T-Handle | Brass | PTFE | Stainless Steel | 00000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 125 | T-Handle | Brass | PTFE | Stainless Steel | 0000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 125 | T-Handle | Brass/Steel | PTFE | Rubber | 000000 | 000000 |
Often used for pressure-vessel testing and other high-pressure applications, these valves can handle at least seven times the outlet pressure of standard tank-mount pressure-regulating valves. They automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. All have Compressed Gas Association (CGA) numbered inlet fittings for secure connections to compressed gas tanks. Choose a valve with the same CGA number as your tank and other system components. Outlet fittings are Swagelok® for a leak-free seal around hard metal tubing in high-pressure lines. Also known as instrumentation fittings, Swagelok® fittings are compatible with Parker A-Lok, Gyrolok, Bilok, and Tylok fittings. Valves have a gauge to monitor outlet pressure and a gauge to monitor inlet pressure from the tank. They are single stage and reduce pressure in one step, which causes the outlet pressure to fluctuate slightly as you empty the tank.
Choose a valve with a maximum outlet pressure that’s approximately twice your application’s normal operating pressure. Your operating pressure should never exceed 75% of the valve’s maximum outlet pressure.
Inlet | Outlet | Material | ||||||||||||
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CGA Number | Location | Thread Direction | Pressure Gauge Range, psi | Stage | For Tube OD | Location | Pressure Range, psi | Pressure Adjustment Method | Shape | Body | Seal | Diaphragm | Each | |
NGO Female Inlet × Swagelok® Female Outlet | ||||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Single | 1/4" | Side | 0 to 1,500 | Knob | Straight | Brass | PCTFE | Neoprene | 0000000 | 0000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Single | 1/4" | Side | 0 to 2,500 | Knob | Straight | Brass | PCTFE | Neoprene | 0000000 | 000000 |
Automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. These valves have Compressed Gas Association (CGA) numbered inlet fittings for secure connections to compressed gas tanks. Choose a valve with the same CGA number as your tank and other system components. Valves come with a gauge to monitor outlet pressure. They are single stage and reduce pressure in one step, which causes the outlet pressure to fluctuate slightly as you empty the tank.
Choose a valve with a maximum outlet pressure that’s approximately twice your application’s normal operating pressure. Your operating pressure should never exceed 75% of the valve’s maximum outlet pressure.
Inlet | Outlet | ||||||||||
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For Use With | CGA Number | Location | Thread Direction | Stage | Thread Size | Location | Thread Direction | Pressure Range, psi | Pressure Adjustment Method | Each | |
UNF Male Outlet × NGO Female Inlet | |||||||||||
Brass Body—Stainless Steel Diaphragm and PTFE Seal | |||||||||||
Liquid Oxygen | CGA 540 | Side | Right Hand | Single | 9/16"-18 | Bottom | Right Hand | 0 to 125 | T-Handle | 0000000 | 0000000 |