Views: 14 Author: Site Editor Publish Time: 2025-06-21 Origin: Site
◆ VPC Official Spanish Language Website
High pressure fittings usually use rubber rings or metal sealing rings to form a seal between the joint and the interface to ensure that compressed air or gas is transmitted without leakage under high pressure. They are often used in industrial systems that need to withstand high-pressure gas transmission.
High pressure resistance: 870psi
High sealing performance: PTFE, metal sealing ring
Multiple connection methods: Threaded connection, ferrule connection, quick connection
High temperature and corrosion resistance: Use corrosion-resistant materials such as stainless steel, brass, and nickel-plated copper.
1. Specifications
| Product Type | High Pressure Brass Fitting |
| Fitting Type | Tee Fitting, Elbow Fitting, Straight Fitting, etc. |
| Surface Finish | Natural Brass / Optional Nickel Plating |
| Max Working Pressure | 870 psi (6.0 MPa) |
| Burst Pressure | ≥ 2,600 psi (18 MPa) |
| Working Temperature | -20°C to +150°C (-4°F to +302°F) |
| Connection Type | Threaded |
| Thread Standard | NPT / BSPT / BSPP (customizable) |
| Thread Size Options | 1/8", 1/4", 3/8", 1/2" |
| Seal Type | Thread sealant / PTFE tape recommended |
| Compliance | RoHS, REACH |
2. High Pressure Fitting VS Ordinary Pneumatic Fitting
| Type | High Pressure Fitting | Ordinary Pneumatic Fitting |
| Working pressure range | ≥1,0 MPa | ≤ 1.0 MPa(0.6~1.0 MPa) |
| Working Medium | High-pressure air, nitrogen, CO₂, hydraulic oil, test gas, etc. | Conventional compressed air, water or vacuum (low pressure) |
| Materials | Stainless steel, carbon steel, nickel-plated copper | Aluminum alloy, plastic, ordinary brass |
| Connection | Threaded, ferrule, metal quick connector | Quick-plug or ordinary thread connection |
| Sealing ring material | PTFE / metal sealing ring | Viton / Ordinary O-ring |
| Application | High-pressure testing equipment, gas boosting systems, refrigeration pipelines, energy equipment, etc. | Automated production lines, cylinder connections, packaging equipment, food machinery, etc. |
3. Application
Combustion / Natural gas turbines and CT engines
High pressure gas detection and testing equipment
Hydraulic-pneumatic hybrid control system
Liquid fuel system
Air booster system (such as nitrogen, hydrogen, oxygen and other high-pressure gases)
High-temperature engine compartments
LNG storage and fueling systems
4. How to choose pneumatic fittings?
① Dimensions
Pipeline outer diameter(O.D)
Metric sizes: 4mm / 6mm / 8mm / 10mm / 12mm / 16mm, etc.
Inch sizes: 1/8" / 1/4" / 3/8" / 1/2" / 3/4" / 1", etc.
Thread Type
NPT, BSPT, BSPP, rosca G, etc.
Male or female thread.
For example ：1/4" BSP thread: 1/4 represents the inside diameter of the tube connected to the female thread in inches.
BSP Thread Dimensions Chart
| Thread Size | Threads per (Inch) | Pitch | Major Diameter (O.D) | Minor Diameter (I.D) | Gage Length | ||||
| Inch | mm | Inch | mm | Inch | mm | Inch | mm | ||
| 1/8 | 28 | 0.0357 | 0.907 | 0.383 | 9.728 | 0.3372 | 8.565 | 0.1563 | 3.97 |
| 1/4 | 19 | 0.0526 | 1.337 | 0.518 | 13.157 | 0.4506 | 11.445 | 0.2367 | 6.012 |
| 3/8 | 19 | 0.0526 | 1.337 | 0.656 | 16.662 | 0.5886 | 14.95 | 0.25 | 6.35 |
| 1/2 | 14 | 0.0714 | 1.814 | 0.825 | 20.955 | 0.7336 | 18.633 | 0.3214 | 8.164 |
| 3/4 | 14 | 0.0714 | 1.814 | 1.041 | 26.441 | 0.9496 | 24.12 | 0.375 | 9.525 |
| 1 | 11 | 0.0909 | 2.309 | 1.309 | 33.249 | 11.926 | 30.292 | 0.4091 | 10.391 |
| 1¼ | 11 | 0.0909 | 2.309 | 1.65 | 41.91 | 15.336 | 38.953 | 0.5 | 12.7 |
| 1½ | 11 | 0.0909 | 2.309 | 1.882 | 47.803 | 17.656 | 44.846 | 0.5 | 12.7 |
| 2 | 11 | 0.0909 | 2.309 | 2.347 | 59.614 | 22.306 | 56.657 | 0.625 | 15.875 |
| 2½ | 11 | 0.0909 | 2.309 | 2.96 | 75.184 | 28.436 | 72.227 | 0.6875 | 17.463 |
| 3 | 11 | 0.0909 | 2.309 | 3.46 | 87.884 | 33.436 | 84.927 | 0.8125 | 20.638 |
| 4 | 11 | 0.0909 | 2.309 | 4.45 | 113.03 | 43.336 | 110.073 | - | - |
Reference articles: Difference Between BSP Thread and NPT, G, R Thread
② Material
Stainless steel pneumatic fitting
Brass pneumatic fitting
Plastic pneumatic fitting
③ Types of pneumatic connectors
Our company has various types of pneumatic connectors and provides selection catalogs, including: male thread straight fitting, female thread straight fitting, bulkhead fitting, elbow fitting, tee fitting, Y type reduce fitting, banjo fitting, cross fitting, stop fitting, etc.
④ Installation Environment
If used in the food, medical or testing industries, it may need to meet specific specifications (such as oil-free, clean, food-grade brass, etc.). Also consider: whether it needs to be corrosion-resistant, whether it is exposed outdoors, whether it is frequently disassembled, etc.
If you have any questions about high pressure brass fittings, please consult VPC Pneumatic. We will help you choose the best threaded components.
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