Silicone Rubber Sealing Covers for Water Heater Electric Heating Tanks | Standard Sizes, Factory Direct Supply, Compatible with Top Brand Suppliers

I. Raw Material Description

The core raw material of this product is modified ABS engineering plastic. The material is optimized to adapt to the special working conditions of solar water heaters, including high temperature, high humidity and long-term immersion in water. Different from general-purpose standard ABS raw materials, it delivers superior temperature resistance, aging resistance and hydrolysis resistance.

The raw material features high purity, stable fluidity and low molding shrinkage, free of impurities and recycled waste admixtures. It ensures the product sealing performance, dimensional accuracy and service life from the source.

ABS resin is the abbreviation of Acrylonitrile-Butadiene-Styrene copolymer. Its three components endow the raw material with multiple core advantages:

II. Core Product Performance Parameters

Through optimized formulation and strict process control, this sealing gasket for solar water tank meets the operating standards of domestic and commercial solar water heaters. Its core parameters are listed as follows:

Temperature Resistance

Operating temperature range: -20°C ~ 95°C. It can withstand short-term boiling water high temperature inside solar water tanks. It will not soften, sag or deform under high temperatures, nor crack at low temperatures, adapting to seasonal temperature fluctuations.

Sealing Performance

High molding precision and excellent fitting performance. It prevents water seepage and leakage, effectively blocking air and water penetration between the inside and outside of the water tank. It eliminates dripping, air leakage and heat preservation failure at the tank cover, achieving a 100% pass rate for static sealing tests.

Physical Properties

Moderate hardness and high toughness. Resistant to tension, extrusion and impact. Not prone to damage during installation and disassembly, and resistant to deformation under long-term compression. Dimensional tolerance is controlled within ±0.1 mm, compatible with the vast majority of solar water tank cover mounting positions.

Weather Resistance & Anti-Aging Performance

Excellent resistance to ultraviolet rays, oxidation and hydrolysis. When exposed to long-term hot water, water vapor and outdoor temperature changes, it resists yellowing, hardening, aging and cracking, with a service life of over 8 years.

Corrosion Resistance

Resists acid and alkali erosion from domestic water and water vapor corrosion. Rust-proof and mildew-proof. It does not chemically react with water inside the tank, featuring zero pollution, no peculiar odor and eco-friendly safety.

Insulation & Safety Performance

Good electrical insulation. Suitable for solar water heaters with electric auxiliary heating function to eliminate electric leakage risks. Complies with safety standards for household kitchen & bathroom hardware.

III. Product Manufacturing Process

This product adopts the one-step molding process with fully automatic injection molding machines, and is produced on standardized assembly lines throughout the whole process. Stable processes and strict quality control guarantee product consistency and high quality. The specific production procedures are as follows:

Raw Material Pretreatment: Specially selected modified ABS dedicated raw materials are dried and purified to remove moisture and impurities. This prevents defects such as air bubbles and sink marks after molding, and ensures material compactness.

High-temperature Melting & Plasticization: Pretreated ABS raw materials are fed into fully automatic injection molding machines. A precise temperature control system enables high-temperature melting and uniform plasticization to ensure consistent fluidity and stable material performance.

High-pressure Injection Molding: High-precision customized molds are used for uniform high-pressure injection to fill mold cavities. Supported by precision mold structures, the gaskets feature consistent radian, aperture and thickness, precise dimensions and flawless sealing surfaces.

Constant-temperature Cooling & Shaping: Staged constant-temperature cooling is carried out after injection molding to avoid deformation and warpage caused by rapid cooling. It stabilizes product structure, meets toughness requirements, and locks in precise dimensions and sealing geometry.

Demolding & Edge Trimming: After automatic demolding, fine edge trimming and deburring are performed to remove excess flash at edges and corners, ensuring smooth appearance and snag-free installation.

Quality Inspection: Batch sampling inspections are conducted for dimensional accuracy, flatness, elasticity, sealing performance and temperature resistance. Defective products are eliminated to ensure every unit meets factory standards.

Cleaning, Packaging & Warehousing: Finished products are cleaned and dedusted, then individually sealed to avoid dust contamination and deformation during transportation and storage before centralized warehousing.

The integrated molding process eliminates secondary splicing operations. Products boast strong integrity and stable structure. Compared with manually processed fittings, they achieve greatly improved sealing performance, durability and dimensional consistency.

IV. Product Application Scenarios

This high-temperature resistant sealing gasket is a dedicated sealing component for solar water heater tanks, compatible with various domestic and commercial solar energy equipment. Its main application scenarios are listed below:

Domestic Solar Water Heaters

Compatible with water tanks of integrated, split, wall-mounted and rooftop domestic solar water heaters. It serves waterproof sealing for inspection port covers, drain port covers, sensor port covers, as well as water inlet and outlet covers of water tanks. It meets maintenance and replacement demands to resolve problems such as water leakage, seepage and poor heat preservation caused by aging of old gaskets.

Commercial Solar Heat Collection Equipment

Suitable for large commercial solar hot water units providing centralized water supply for hotels, homestays, factories, schools and residential communities. Used as sealing parts for tank end caps, inspection openings and reserved interfaces, it adapts to long-term high-temperature and high-frequency operating conditions.

Maintenance & Replacement for Solar Water Tanks

For maintenance replacement when the original gaskets suffer aging, hardening, cracking, water leakage and sealing failure during operation of water heaters. It is a commonly used universal component for solar after-sales service and home appliance maintenance industries.

Supporting Parts for New Solar Equipment

It can be used as original supporting sealing parts for manufacturers of brand-new solar water heaters. Featuring strong adaptability and wide compatibility, it fits tank covers of various standard specifications.

The product is fully applicable to hot water high-temperature, high-humidity, indoor and outdoor open-air service environments. Balancing sealing performance, durability and safety, it is a core waterproof sealing and thermal protection component for solar water heater tanks.