Specifications: GVR30010JT is an Airtac 300-series vacuum regulator with NPT 3/8 main ports. Its current configuration has no mounting bracket, an included pressure gauge.
Product Catalog
Download Airtac Product Catalog (PDF)
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Model Code Explained
| Code |
Meaning for this model |
| GVR |
vacuum regulator |
| 300 |
300 size series |
| 10 |
NPT 3/8 main connection |
| J |
Without bracket |
| Blank — gauge |
Pressure gauge included |
| T |
NPT thread; kPa/psi vacuum scale |
Technical Specifications
| Parameter |
Details |
| Model |
GVR30010JT |
| Working medium |
Air |
| Main port |
NPT 3/8 |
| Working pressure |
−100 to −1.3 kPa |
| Catalog maximum-pressure entry |
−1.0 kPa (printed value; negative-pressure service only) |
| Air inhalation |
≤0.6 L/min (ANR) |
| Operating temperature |
−20–70 °C |
Weight Reference
| Parameter |
Details |
| Reference weight |
336 g; 2022 Chinese comprehensive catalog, printed page 300 / PDF page 301; published reference GVR300-10J. Assigned as an estimated reference for the current configuration, not a measured product or shipping weight. no separate mass correction is calculated for gauge (blank), thread T. Actual supplied-product weight may differ. |
Features and Operation
The knob locks after adjustment, and the regulator can be mounted using its panel thread or a bracket. This is a negative-pressure regulator; positive pressure is prohibited.
Provide a safety circuit for loss of electrical power, vacuum pump operation or regulator function. Before disconnecting tubing, return the pressure to atmospheric pressure and isolate the vacuum pump.
The regulator is not intended to regulate vacuum-pump pressure. The catalog also excludes a vacuum generator whose flow capacity is below that of the regulator.
Turning the knob clockwise moves the setting from atmospheric pressure toward vacuum; counterclockwise returns it toward atmospheric pressure. Push the knob until it clicks after setting.
External and Mounting Dimensions
Dimensions are in millimeters unless a thread or other unit is shown. Lettered entries follow the catalog drawing; local callouts must not be combined into an invented length × width × height. Optional brackets and gauges are shown for reference only when their omission code is selected.
| Parameter |
Details |
| A |
62.5 mm |
| AB |
53 mm |
| AC — diameter |
38 mm |
| B |
99.5 mm |
| BA |
41 mm |
| BC |
58.5 mm |
| C |
112 mm |
| D |
M40×1.5 |
| K |
6.5 mm |
| KA |
40 mm |
| KB |
8 mm |
| KC |
46 mm |
| P |
NPT 3/8 |
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Internal Components
The numbers below follow the catalog sectional drawing. They identify components, not spare-part ordering codes or a kit quantity schedule. Bowl guards and liquid-level parts are shown for their respective bowl structures; a gauge is included only when the current ordering code specifies it.
| Drawing number / component |
Catalog material or scope |
| 1 — Cap |
POM |
| 2 — O-ring |
NBR |
| 3 — Body |
Aluminum alloy |
| 4 — Spool |
Aluminum alloy |
| 5 — O-ring |
NBR |
| 6 — Diaphragm |
NBR |
| 7 — Spring |
SWC |
| 8 — Fixed ring |
PA66 with glass fiber |
| 9 — Spindle |
Steel |
| 10 — Nut |
Steel |
| 11 — O-ring |
NBR |
| 12 — Knob |
POM |
| 13 — Seat |
POM |
| 14 — Gas resistance |
Aluminum alloy |
| 15 — Diaphragm upper core |
Aluminum alloy |
| 16 — Diaphragm lower core |
Aluminum alloy |
| 17 — Plug |
Aluminum alloy |
| 18 — Bottom cover |
POM |
| 19 — O-ring |
NBR |
| 20 — Spring |
Stainless steel |
Accessories and Installation
| Parameter |
Details |
| Mounting bracket |
Omitted by J; do not count a bracket as included |
Flow / Performance Characteristics
| Parameter |
Details |
| Flow horizontal axis |
Air flow, 0–400 L/min; 50 L/min labels |
| Flow vertical axis |
Set pressure, 0 to −90 kPa; 10 kPa labels |
| Pressure-chart horizontal axis |
Vacuum source at P, 0 to −90 kPa |
| Pressure-chart vertical axis |
Set pressure at A, 0 to −70 kPa |
| Circuit labels |
P connects to the vacuum pump; A is the regulated outlet |
These values describe the printed chart axes and conditions. An axis limit is not a rated flow or a guaranteed tolerance. Curves for a representative port or configuration are series references; use the original PDF to read the plotted relationships.
Series Ordering Options
The following choices belong to the catalog family. They are alternatives, not a list of everything included with the current model.
| Parameter |
Details |
| Available size / main port |
200: 06 (1/8), 08 (1/4); 300: 08 (1/4), 10 (3/8) |
| Bracket |
Blank: included; J: omitted |
| Gauge |
N: omitted; blank: included |
| Thread |
Blank: PT; G: G; T: NPT |
Optional Piping Accessories
P = the GVR NPT3/8 female main connection to the vacuum pump, shown on the left; A = the NPT3/8 female main connection to the regulated vacuum circuit on the right. Follow the actual body P and A marks. P is not a positive compressed-air supply role. Connect each side separately without bridging or bypassing regulation; each listed male fitting is an alternative for its assigned side. Drawing D is the panel-mounting thread, not a pneumatic or drain port. The catalog 10 Torr accessory limit restricts the usable vacuum range. Multiple keys retain each use. Tube OD is mm (in = inches); compression/tubing show OD × ID. These piping accessories are optional and ordered separately.
Code-prefix uses (match the longest listed family prefix): NBB male–male; NBD male–female; NBKC compression fitting; NBPC metal straight; NPC straight; NPEB branch tee; NPED run tee; NPH banjo elbow; NPHF female branch banjo; NPHW twin banjo; NPKD reducing distribution fitting; NPL elbow; NPLL extended elbow; NPYB Y; NPZB cross.
| Use |
Size / complete codes |
| P,A (discontinued) |
male NPT3/8 ↔ male NPT1/4: NBB1/4-3/8
male NPT1/8 ↔ male NPT3/8: NBB1/8-3/8
male NPT1/2 ↔ male NPT3/8: NBB3/8-1/2
male NPT3/8 ↔ male NPT3/8: NBB3/8-3/8
male NPT3/8 ↔ female NPT1/4: NBD1/4-3/8
male NPT3/8 ↔ female NPT1/8: NBD1/8-3/8
1/2 × 1/3 in: NBKC1/2-1/3-3/8
1/4 × 5/32 in: NBKC1/4-5/32-3/8
3/8 × 1/4 in: NBKC3/8-1/4-3/8
5/16 × 1/5 in: NBKC5/16-1/5-3/8
1/2 in: NBPC1/2-3/8,NPH1/2-3/8,NPHW1/2-3/8,NPLL1/2-3/8,NPZB1/2-3/8
1/4 in: NBPC1/4-3/8,NPH1/4-3/8,NPHW1/4-3/8,NPLL1/4-3/8,NPZB1/4-3/8
3/8 in: NBPC3/8-3/8,NPH3/8-3/8,NPHW3/8-3/8,NPLL3/8-3/8,NPZB3/8-3/8
5/16 in: NBPC5/16-3/8,NPH5/16-3/8,NPHW5/16-3/8,NPLL5/16-3/8,NPZB5/16-3/8
1/2 in; male RA NPT3/8 / female RB NPT3/8: NPHF1/2-3/8
1/4 in; male RA NPT3/8 / female RB NPT3/8: NPHF1/4-3/8
3/8 in; male RA NPT3/8 / female RB NPT3/8: NPHF3/8-3/8
5/16 in; male RA NPT3/8 / female RB NPT3/8: NPHF5/16-3/8
main 3/8 / branch 5/16 in: NPKD3/8-5/16-3/8 |
| P,A |
1/2 in: NPC1/2-3/8,NPEB1/2-3/8,NPED1/2-3/8,NPL1/2-3/8,NPYB1/2-3/8
1/4 in: NPC1/4-3/8,NPEB1/4-3/8,NPED1/4-3/8,NPL1/4-3/8,NPYB1/4-3/8
3/8 in: NPC3/8-3/8,NPEB3/8-3/8,NPED3/8-3/8,NPL3/8-3/8,NPYB3/8-3/8
5/16 in: NPC5/16-3/8,NPEB5/16-3/8,NPED5/16-3/8,NPL5/16-3/8,NPYB5/16-3/8 |
These optional fittings are ordered separately for the GVR vacuum regulator. P and A are separate female main ports, each requiring its own exact-size male PT, G or NPT connection; the thread standards are not interchangeable. Follow the actual body markings: P connects to the vacuum pump on the left in the catalog section, and A connects to the regulated vacuum circuit on the right. Do not bridge these ports or bypass regulation.
The GVR pressure range is −100 to −1.3 kPa for air. The separate catalog maximum-pressure entry of −1.0 kPa does not extend that range and is not a proof-pressure rating. Positive pressure is prohibited. The selected fitting families list a negative-pressure limit of −750 mmHg (10 Torr). At BOTH P and A connections, keep the actual absolute pressure at or above 10 Torr and within the GVR pressure range, using the actual local atmospheric pressure when converting gauge and absolute values. P and A may operate at different vacuum levels; check both sides during start-up, adjustment, steady operation and isolation, including piping losses and admitted air. These fittings do not cover every point of the GVR nominal scale or establish system leakage, ultimate vacuum or regulation performance.
The catalog air-inhalation consumption of ≤0.6 L/min (ANR) is not a rated main-flow capacity. Use the applicable GVR200 or GVR300 flow and pressure curves for the actual pump-side pressure, controlled pressure and required throughput; chart axis maxima are not additional operating ratings. The GVR is not intended to regulate vacuum-pump pressure, and the catalog excludes a vacuum generator with flow capacity below the regulator’s requirement. Keep the regulator’s intended atmospheric air-inhalation and venting paths unobstructed; none of the listed fittings is assigned to those paths.
Keep the complete GVR and connected materials within −20–70°C and every stricter local component limit. The plastic push-in groups, including their listed -S versions, have a −20–70°C component range, giving a −20–70°C intersection with GVR. Metal push-in, compression and threaded-adapter groups have a 0–150°C component range, so those connections are limited to 0–70°C here. A metal or stainless part does not raise the temperature or vacuum rating of its seals, tube or the complete assembly.
This is a vacuum regulator, not a filter or lubricator. J omits the mounting bracket and N omits the pressure gauge; without the respective omission code, the original inclusion applies. Support the regulator and piping independently and preserve access to the adjusting knob and its push-to-lock function. Drawing D is the M33×1.5 or M40×1.5 panel-mounting thread, not a pneumatic connection. No listed item is assigned to a gauge tapping, atmospheric vent, drain or mounting hole.
The fitting catalogs specify suitable soft nylon or PU tube, but positive-pressure tube ratings alone do not establish vacuum suitability. No complete tube model is recommended in this list. Select tubing separately with verified vacuum resistance, resistance to collapse, temperature and chemical compatibility, and acceptable leakage for the actual circuit. Match the listed OD at every push-in socket and both OD and ID at compression fittings; metric and inch sizes are not interchangeable. Check insertion, retention, seal condition, bend radius, support and clearance before evacuating the line.
Use the correct thread seal or face gasket for each mating end and verify airtightness after assembly. Tighten fitting bodies by their specified hex rather than by tube nuts, release buttons or the regulator knob. For tee, branch and distribution fittings, keep all outlets on their assigned P-side or A-side circuit; every remaining outlet needs a correctly sealed vacuum-rated connection. Do not leave an open branch, bypass the regulator or connect a main vacuum line to an unrelated service port.
NPHF fittings use male RA at the selected GVR P or A port; female RB requires its own matching male thread and seal and is not a tube socket. Match the separate tube socket by its listed OD and check banjo seating and clearance. For every threaded adapter, match the other end’s exact size and male/female form to its own mating part on that same side of the regulator; a matching first end does not qualify the second end automatically.
Use the exact NPT thread and the inch tube sizes shown for the selected fittings. A metric tube of a nearby diameter is not a substitute. The NPT designation on the fitting does not identify a tube diameter; threaded and tube ends must each be checked independently.
The catalog component positive-pressure and proof ratings do not authorize pressurizing the GVR vacuum circuit. Isolate and safely return the circuit to atmospheric pressure before removing tubing or fittings; follow the GVR safety and maintenance instructions, including protection against power loss, pump failure or regulator failure. Confirm actual availability or an approved replacement before ordering. Items marked discontinued are historical service references, not current standard recommendations; an unmarked catalog entry does not promise current production, stock or delivery.
