Silicone Oil Seals for 1/2" Solar Water Tank Heat-Locking Gaskets - In Stock, Quality Guaranteed, Direct from Factory

I. Raw Material Specification

The gasket for solar water heater tanks is manufactured from premium 40° silicone raw material. The 40° hardness represents the optimal hardness of silicone for sealing components, striking a balance between flexible conformability and structural support to fully meet the sealing requirements of water tanks.

The raw material undergoes rigorous screening, featuring high purity, zero impurities and excellent toughness. It delivers outstanding resistance to high temperatures, weathering and ageing.

Compared with ordinary rubber and inferior silicone materials, the dedicated 40° silicone raw material withstands the alternating hot and cold operating conditions of water heaters over the long term. Resistant to prolonged exposure to hot water and steam, it is not prone to hardening, cracking, deformation, yellowing, ageing or water leakage.

Boasting exceptional sealing performance and resilience, the material tightly fits gaps between pipe fittings under compression and accommodates gap variations caused by pipeline vibration, fundamentally eliminating risks of seepage and leakage.

Moreover, it is non-toxic, odourless, eco-friendly and compliant with material standards for water-contact home appliance parts, ensuring safe and worry-free application.

II. Raw Material Performance Parameters

III. Production Process

The product is manufactured by integrated compression molding technology using a vulcanizing machine with standardized precision processing throughout the whole production flow. Differentiated from conventional cutting and splicing processes, it delivers more consistent quality.

First, the selected 40° silicone raw material undergoes pretreatment with constant temperature treatment and impurity removal to ensure uniform and stable material texture. The pretreated material is then fed into high-precision vulcanization molds and shaped under high temperature and high pressure via the vulcanizing machine.

With precise temperature and time-controlled vulcanization, the molecular structure of silicone material achieves sufficient curing and cross-linking, greatly improving the compactness, toughness, wear resistance and tear strength of finished products.

The integrated molding process produces gaskets free of splicing gaps, burrs and defects, featuring precise dimensional tolerance, uniform thickness and smooth regular curved sealing surfaces.

Finished products go through multiple quality inspection procedures including secondary deflashing, pressure testing, temperature resistance testing and waterproof testing to eliminate defective goods. This effectively guarantees sealing performance and stability during long-term service, with a service life far exceeding gaskets made by ordinary manufacturing processes.

IV. Product Application Scenarios

The 4-point oil-locking sealing ring is a dedicated sealing fitting for solar water heaters, specially engineered for core sealing positions on water tanks of various domestic and commercial solar water heaters with strong versatility.

It is mainly used for waterproof sealing of critical locations such as 4-point connections, oil locking ports, water inlet & outlet ports, drain ports, temperature probe mounting ports and heat exchange ports of solar water heater tanks.

It is widely compatible with mainstream solar water heater models including integrated, split, wall-mounted and floor-standing types. It also suits high-temperature oil-sealing applications for solar collector connecting pipes and tank oil circuits. It reliably copes with complex operating conditions of water heaters, such as long-term high-temperature water circulation, alternating hot and cold cycles, water pressure fluctuation and minor pipeline vibration.

Apart from dedicated solar water heater applications, it can also be applied to high-temperature wetted sealing scenarios for small hot water equipment, insulated water storage tanks, domestic heating pipes and other fittings equipped with same-specification 4-point connections.

It is designed to resolve common issues such as loose equipment connections, gasket aging, gap seepage and dripping leakage. It serves as an essential replacement part for routine maintenance, component replacement and upkeep of water heaters.