Material: Stainless steel 304
Color: Metallic color
Temperature resistance: -40°C ~ +150C
Moisture permeability: >5000g/24H.M2
Resistant to fine water pressure:≥100mbar for30min
Product characteristics: Dustproof, hydrophobic, breathable, heat dissipation, oil-proof
Alr permeability: ≥1500ml/min/@70mbar
Our stainless steel vent plug is designed to provide reliable pressure and vacuum relief for tanks, vessels and piping systems. Constructed from high-quality stainless steel for superior corrosion resistance and durability, it ensures safe and efficient “breathing” of the system—letting air in or out as required to maintain pressure equilibrium, prevent tank deformation and protect equipment integrity.
Key Features
1，Body material: 304 or 316L stainless steel (depending on model) offering excellent resistance to harsh chemical and environmental conditions.
2，Pressure/Vacuum relief: Automatically opens to vent excess positive pressure, and/or draws in air when vacuum occurs — thereby maintaining near atmospheric internal pressure.
3，Wide operating temperature range and durable sealing materials: Seals made of PTFE, EPDM or Viton are available depending on application. 4，Various connection sizes and types: Threaded, tri-clamp, flange or sanitary connections to suit different tank or vessel configurations.
5，Hygienic / sterile versions available: For food, beverage or pharmaceutical applications, with polished internal surfaces and sanitary fittings.
6，Compact and reliable design: Minimal maintenance, simple installation (typically mounted at top of tank/vessel) and stable performance over time.
Technical Specifications (typical)
1，Materials: 304 SS or 316L SS for body; sealing components PTFE/Viton/EPDM.
2，Pressure relief range: e.g., +0.9 PSI for vacuum break, +1 PSI for positive pressure (factory pre-set for hygienic version)
3，Temperature range: approx. –10 °C to +140 °C (14 °F to 285 °F) for hygienic model.
4，Connection sizes: 1.5″–3″ OD in hygienic version; other threaded/flanged sizes available.
5，Finish: Internal / external mirror polish (for sanitary types) with Ra < 0.6 µm for ID.
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| Item | Breathability | Thread length GL |
Overall length H |
Thread O.D. | Spanner Size | Code |
| M4×0.B | 200ml/mln/@70mbar | 6 | 13 | 4 | 8 | HX-BF.M4SS |
| M5×0.B | 300m/min/@70mbar | 7 | 15 | 5 | 10 | HX-BF.M5SS |
| M6×1.0 | 300ml/mln/@70mbar | 7 | 15 | 6 | 10 | HX-BF.M6SS |
| M8×1.0 | 900ml/mln/@70mbar | 7 | 16 | 8 | 14 | HX-BF.M8SS |
| M8×1.25 | ≥900ml/mln/@70mbar | 7 | 16 | 8 | 14 | HX-BF.M&x1.25SS |
| M10×1.0 | 1500mL/mln/@70m bar | 8 | 16 | 10 | 17 | HX-BF.M105S |
| M10×1.5 | 1500mL/mln/@70m bar | 8 | 16 | 10 | 17 | HX-BFM10x1.5SS |
| M12×1.5 | ≥1500mL/mln/@70m bar | 6 | 14 | 12 | 17 | HX-BF.M12 L65S |
| M12×1.5 | 1500ml/mln/@70m bar | 7 | 15 | 12 | 17 | HX-BFM12L75S |
| M12×1.5 | ≥1500mL/mln/@70m bar | 10 | 18 | 12 | 17 | HX-BF.M12 L10SS |
| M12×1.75 | 1500mL/mln/@70m bar | 7 | 15 | 12 | 17 | HX-BF.M12x1.755S |
| M12×1.75 | ≥1500mL/mln/@70m bar | 10 | 18 | 12 | 17 | HX-BF.M12X1.755S |
| M16×1.5 | 2300mL/mln/@70m bar | 10 | 19.5 | 16 | 22 | HX-BF.M165S |
| M20×1.5 | 2300mLmln/@70m bar | 10 | 19.5 | 20 | 22 | HX-BF.M205S |
| M22×1.5 | 2300mL/mln/@70m bar | 10 | 23 | 22 | 28 | HX-BF.M225S |
| M24×1.5 | ≥2500ml/mln/@70m bar | 10 | 21 | 24 | 30 | HX-BF.M245S |
| M25×1.5 | 2500m/mln/@70m bar | 10 | 21 | 25 | 30 | HX-BF.M255S |
| M40×1.5 | 2500ml/mln/@70m bar | 15 | 30 | 40 | 45 | HX-BF.M405S |
| G1/8 | 1500mLmln/@70m bar | 8 | 16 | 18.5 | 17 | HX-BF.G1/85S |
| G1/4 | 1500m/mln/@70m bar | 7 | 15 | 18.5 | 17 | HX-BF.G1/45S |
| G3/8 | ≥2300mL/mln/@70m bar | 10 | 19.5 | 24 | 22 | HX-BF.G1/255 |
| G1/2 | 3000ml/mln/@70mbar | 10 | 23 | 35.5 | 32 | HK-BF.G2/45S |
| NPTI/8 | 1500mL/mln/@70m bar | 8 | 16 | 18.5 | 17 | HX-BF.NPTI/8SS |
| NPT14 | ≥1500m/mln/@70m bar | 7 | 15 | 18.5 | 17 | HX-BF.NPTI/45S |
| NPT2/后 | 2300m/mln/@70m bar | 10 | 19.5 | 24 | 22 | HX-BF.NPT3/8SS |
| NPTI/2 | 2300ml/mln/@70mbar | 10 | 19.5 | 24 | 22 | HK-BF.NPTI/255 |
| Other styles support callconsuItatlon | ||||||
| Item | Breathability | Thread length GL |
Overall length H |
Thread O.D. | Spanner Size | Code |
| M5×08 | ≥200ml/mln/@7ombar | 5 | 9 | 5 | 8 | HX-BF.M5-T SS |
| M6×10 | ≥200ml/mln/@7ombar | 5 | 9 | 6 | 8 | HX-BF.M6-TSS |
| MB×1.25 | ≥500ml/mln/@7ombar | 7 | 12 | 8 | 12 | HX-BF.MBx1.25-T SS |
| M10×1.5 | >500ml/mln/@70mbar | B | 13 | 10 | 14 | HX-BF.M10x1.5-T SS |
| M12×1.5 | 1500ml/mln/@70mbar | B | 13 | 12 | 16 | HX-BF.M12-TSS |
| M16×1.5 | ≥1700ml/mln/@70mbar | 10 | 15 | 16 | 20 | HK-BF.M16-TSS |
| M20×1.5 | ≥2300ml/mln/@70mbar | 10 | 15 | 20 | 24 | HX-BF.M20-TSS |
| Other styles support call consultation | ||||||
Each structure is meticulous and well-protected, which can effectively prevent water leakage and displacement.
| Fitting Material: | Stainless steel 304 |  |
| Color: | Metallic color | |
| Temperature resistance: | -40℃~+150℃ | |
| Moisture permeability: | >5000g/24H.M2 | |
| Resistant to fine water pressure: | ≥100mbar for 30min | |
| Product characteristics: | Dustproof, hydrophobic, breathable, heat dissipation, oilproof |
|
| Airpermeability: | ≥1500ml/min/@70mbar |
It is widely used in mechanical automation, new energy vehicles, wind power energy storage, electronic communications, marine and aviation, nuclear power plants, and various other scenarios
The nickel-plated brass ventilation valve resists corrosion and high temperatures. Its hydrophobic, breathable membrane ensures breathability and waterproofing, blocking liquids and dust while balancing pressure differences to prevent seal failure.
It can be dust-proof, salt-proof, acid-alkaline, alcohol-grease and general solvent, suitable for outdoor harsh environments Plug and play, convenient and fast.
The Waterproofing Industry Adheres to Innovation
Zhejiang Hongxiang Connector Co., Ltd. was founded in 2006 with a registered capital of 5 million yuan. And in 2018, it is a high-tech company which integrates research and development, production and sales. There are more than 100 employees in the company, and it is equipped with a professional sales team and a workshop management team.
The company is mainly aimed at the global sales of cable connectors and accessories for various materials. After more than nineteen years of development, it has provided thousands of customers with a high-quality product experience. We always pursued the most cost-effective products.
In 2024, Hongxiang Connector significantly broadened its business scope by introducing a new product line, the CFM (Cable and Fibre Management) solutions. This strategic expansion aims to enhance the efficiency of wire harness crimping processes for clients while simultaneously reducing their production costs.
The idea of the company is “customer first: We solve the problems for customers in time, due to the customer is the parent of food and clothing. Purse quality: only imperfect products, no critical customers. Be optimistic and positive: never give up when encountering difficulties and setbacks, and constantly motivate ourselves.” This mission is keeping the cable connector industry. We have established a good reputation in the industry and won the praise of all customers.
