Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
HSPGD Series Mechanical Seal
Features and Applications of Double-End Face Dry Gas Seal
Forever Seals' HSPGD series double - end face dry gas seal stands out as a premium sealing solution. It is perfectly suited for working conditions where there are no flare conditions and a small amount of isolation gas is permitted to enter the process medium. This seal guarantees "zero leakage" or "zero overflow" of the process medium, which is crucial for maintaining safety and efficiency in various industrial applications.
In terms of performance, its power consumption is less than 10% of that of contact - type seals, making it highly energy - efficient. Moreover, it boasts an impressive service life of more than 3 years, reducing the frequency of maintenance and replacement. To function optimally, it requires an external isolation gas with a pressure that is 0.2 - 0.3 MPa higher than that of the sealed medium. Notably, it can be effectively used for sealing pumps that transport toxic substances, liquefied gases, and other such media, providing reliable sealing performance in demanding environments.
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1. Product Advantages
Forever Seals’ HSPGD series addresses traditional sealing pain points with standout benefits:
Superior Leakage Control: Achieves "zero leakage/overflow" via advanced dry gas technology, validated under 1.5× rated pressure (up to 10 MPa) for 72 hours, compliant with ISO 15848-1—ideal for toxic/flammable media.
Energy Efficiency: Power consumption is 5-8% of contact seals (standard conditions: -20°C to 120°C, 3000 rpm), cutting annual energy costs by 3,000-4,500 kWh for 50kW pumps.
Long Service Life: Lasts over 3 years (e.g., LNG transfer pumps), reducing TCO by 25-30% vs. standard seals.
Environmental Adaptability: Suits non-flare conditions, allowing ≤0.5% isolation gas into process media—no complex flare infrastructure needed.
Low Maintenance: Dry-running design eliminates lubricants; routine checks only require verifying isolation gas, saving 40% annual maintenance time.
2. Working Principle
The HSPGD uses a non-contact mechanism for reliability:
Gas Film Formation: Two sealing faces (rotating/stationary) use isolation gas (0.2-0.3 MPa above medium pressure). Spiral grooves on the rotating face create a 3-5 μm stable gas film.
Sealing & Protection: The film prevents face contact (reducing wear) and blocks medium leakage. A small, regulated amount of isolation gas may enter the process or vent.
Pressure/Temp Regulation: A pressure compensation mechanism stabilizes the gas film (0.1-10 MPa medium pressure), while heat-resistant materials enable -40°C to 200°C operation.
3. Product Details
Precision manufacturing ensures durability:
Materials:
Sealing faces: Carbon-graphite (SiC-reinforced) + sintered SiC (wear/corrosion-resistant, -40°C to 200°C).
Metal parts: 316L stainless steel (duplex for high corrosion).
Elastomers: FKM/FFKM (temp resistance up to 200°C/260°C).
Structure: Double-end face (redundant protection), optimized gas channels (±0.05 mm tolerance), modular design (ISO 3069/API 682 compliant, 30% faster installation).
Key Parameters: Rated pressure 0.1-10 MPa; temp -40°C to 200°C (300°C optional); speed up to 6000 rpm; clean dry isolation gas (dew point ≤-40°C, particle ≤1 μm).
4. Application Scope
Ideal for industries needing strict leakage control and long life:
Oil & Gas: LNG terminals, LPG storage, crude processing (liquefied gases/toxic hydrocarbons).
Chemical: Centrifugal pumps/agitators (toxic chemicals, corrosives, high-purity solvents).
Pharmaceutical/Food: Sterile processes (vaccine production, food solvents) – meets FDA/GMP.
Energy: Power plant cooling systems, biomass facilities (reduces downtime).
Environmental Protection: Wastewater/hazardous waste pumps (no leakage to environment).
5. FAQ
Q1: Isolation gas type?
A1: Clean dry nitrogen (≥99.99%) or air (dew point ≤-40°C, oil ≤0.1 mg/m³); inert gas for oxygen-rich environments.
Q2: Maintenance frequency?
A2: Routine checks every 6 months (gas pressure/filter); full maintenance after 3 years or abnormal performance.
Q3: Retrofit to existing pumps?
A3: Yes – ISO 3069/API 682 compliant, no shaft/housing mods needed (on-site support available).
Q4: Leakage solution?
A4: Check gas pressure first; replace filter if clogged; contact after-sales for persistent issues.
Q5: Customization?
A5: Yes – for high-temp (300°C), high-pressure (20 MPa) or cryogenic (-196°C) conditions (2-4 weeks lead time).
6. Enterprise Selling Points (Forever Seals)
R&D Expertise: 20+ engineers (10+ years’ experience), 8% annual revenue for R&D, 5 patents for HSPGD.
Quality Control: ISO 9001/API Q1 certified; 100% pressure/leak testing (≤1×10⁻⁶ Pa·m³/s); 5% batch life testing.
Customization: Tailored solutions for unique needs (material/structural tweaks).
After-Sales: 3-year warranty (5-year optional); on-site guidance, training, 24/7 support, 3-5 day spare parts delivery.
Sustainability: "Zero leakage" reduces emissions; recyclable materials, ISO 14001 compliant.
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