Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
HSPGL Series Tandem Dry Gas Seals: A Reliable Choice for Sealing in Special Working Conditions
For pumps with light hydrocarbons/volatile media, dual sealing, 2 - 3 years life
Developed by Forever Seals, the HSPGL series tandem dry gas seals are engineered for pumps handling light hydrocarbons and volatile media—solving common issues like inefficiency or leakage from media volatility. Its specialized design ensures reliable performance in fluctuating pressure/temperature, while eliminating media loss to meet safety and environmental standards. The integrated dual-sealing structure (main + safety functions) cuts maintenance needs and downtime, and with a 2-3 year service life, it offers a cost-effective, durable choice for high-demand fields like petrochemical processing.
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1. Product Advantages
The HSPGL series stands out for its targeted solutions to industrial sealing pain points, with core advantages including:
Superior Leakage Prevention: Its tandem dual-sealing structure (combining a main seal and a safety seal) forms a double protective barrier, reducing leakage of light hydrocarbon and volatile media to near-zero levels—fully complying with strict environmental and safety standards such as ISO 15790.
Long Service Life: The series adopts wear-resistant silicon carbide (SiC) friction pairs and corrosion-resistant alloy housings, ensuring a stable service life of 2 to 3 years. This lifespan is twice as long as that of standard single-seal designs used for similar media.
Low Maintenance Cost: Optimized lubrication for the seal face minimizes friction loss, while the modular design enables quick replacement of core components. This reduces equipment downtime by 30% compared to traditional seals, lowering overall maintenance expenses.
Wide Operating Condition Adaptability: It operates stably within a temperature range of -40°C to 200°C and can withstand pressure up to 2.5 MPa, making it suitable for fluctuating working conditions in light hydrocarbon pumping systems.
2. Working Principle
The HSPGL series utilizes a tandem dry gas sealing mechanism, specifically designed for media with high vapor pressure. The working process can be broken down into three key steps:
Main Seal Operation: The primary seal consists of stationary and rotating rings. It relies on a thin gas film (derived from process gas or inert gas) to maintain non-contact rotation between the rings. This design minimizes wear on the seal faces while effectively blocking most of the media from leaking.
Safety Seal Backup: In the event of abnormal wear on the main seal or fluctuations in system pressure, the secondary safety seal immediately activates. This backup function prevents media leakage, avoiding unexpected equipment shutdowns and potential safety hazards.
Auxiliary Gas Purge: All HSPGL models come with standard optional inert gas purge ports. These ports flush residual media out of the seal cavity, preventing coking or crystallization of volatile components and further extending the service life of the seal.
3. Product Details
The HSPGL series features a range of precise specifications tailored to industrial needs. For the friction pair material, silicon carbide (SiC) or tungsten carbide (WC) is used as standard, and customization is available for applications involving highly corrosive media. The housing material is 316L stainless steel by default, with Hastelloy C-276 offered as an optional upgrade for use in harsh, corrosive environments. In terms of seal type, it is a tandem dry gas seal, available in both single-cartridge and double-cartridge designs to suit different pump configurations. The shaft diameter range it supports is 30 mm to 150 mm, and for non-standard pumps, custom-sized options are provided to ensure a perfect fit. Installation is simplified thanks to its cartridge-mounted design—each seal is pre-assembled at the factory, eliminating the need for on-site adjustments and reducing installation time. Additionally, the series holds key certifications including CE, ISO 9001, and API 682, ensuring full compliance with global industrial pump sealing standards.
4. Application Range
The HSPGL series is specifically engineered for pumps that handle light hydrocarbons and volatile media, with wide-ranging applications across multiple industries:
Petrochemical Industry: It is ideal for light hydrocarbon transfer pumps (such as those used for propane and butane) and naphtha circulation pumps, where reliable sealing of volatile media is critical.
Refining Sector: It is commonly used in condensate recovery pumps and gasoline/diesel transfer systems, supporting smooth operations in oil refining processes.
LNG & Energy: For low-temperature volatile media pumps—including liquefied natural gas (LNG) precooling pumps—it maintains stable performance even in extreme low-temperature conditions.
Chemical Processing: In pharmaceutical and fine chemical production, it is suitable for volatile solvent pumps (e.g., those handling methanol and ethanol), ensuring product purity and process safety.
5. FAQ (Frequently Asked Questions)
Q1: Can the HSPGL series be retrofitted to existing pumps?
A: Yes, it can. The cartridge-mounted design of the HSPGL series ensures compatibility with most standard centrifugal pumps, such as API 610 pumps. To facilitate seamless retrofitting, Forever Seals provides a pump model matching service—our team will verify the specifications of your existing pumps to ensure the seal fits perfectly, without the need to modify the pump housings.
Q2: What maintenance is required during use?
A: Three key maintenance tasks are recommended. First, check the seal cavity pressure monthly, ensuring it remains 0.1-0.2 MPa higher than the process pressure to maintain effective sealing. Second, if the gas purge function is in use, inspect the purge gas flow quarterly to ensure it is operating at the required rate. Third, replace the O-rings every 1.5 years to prevent leaks caused by O-ring aging.
Q3: How to handle seal failure emergencies?
A: In case of seal failure, contact Forever Seals’ 24/7 technical support team immediately via phone or email. Our experts will provide real-time on-site troubleshooting guidance to minimize downtime. Additionally, our global warehouse network ensures that replacement parts are delivered within 3-5 days for most regions, enabling quick repairs and restoring equipment operation promptly.
6. Enterprise Selling Points (Forever Seals)
15+ Years of Expertise: Forever Seals has over 15 years of specialized experience in developing dry gas seals for volatile media. Our R&D team has obtained 8 patents for optimizing tandem seal structures, demonstrating our technical leadership in the field.
Customization Capability: We offer tailor-made sealing solutions for non-standard media, such as highly corrosive or high-viscosity light hydrocarbons. Our team works closely with customers to analyze their specific process parameters and design seals that meet unique operational requirements.
Global Service Network: We have established 12 regional service centers spanning Asia, Europe, North America, and Africa. These centers provide on-site services including installation, maintenance, and operator training, ensuring timely support for customers worldwide.
Quality Commitment: Every HSPGL seal undergoes 100% performance testing before delivery, including rigorous leakage rate tests and pressure resistance tests, to guarantee reliable quality. We also offer a 1-year warranty for all standard HSPGL products, providing customers with added peace of mind.
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