Prevention of nut rotation! Safe against water hammer, a flared joint that prevents loosening and leakage.
"Zetlock Two" is a highly reliable mechanical joint for stainless steel piping with a 20-year track record of "Zetlock," which features a function to prevent nut loosening and leakage after piping installation, further pursuing safety and security. It can prevent the rotation of the opposite end nut through the pipe, which was a concern when tightening the piping during or after installation. 【Features】 ■ Prevents nut loosening and leakage caused by water hammer and other factors ■ Prevents nut rotation ■ Addresses loosening and leakage at connection points due to transportation ■ Provides peace of mind during installation through tactile feedback (sound and vibrations transmitted through tools) ■ Offers the same items as Zlok in the lineup *For more details, please refer to the PDF document or feel free to contact us.
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basic information
【Scope of Application】 ■Applicable Pipe Types ・JIS G 3448 (Stainless Steel Pipes for General Piping) Nominal Sizes 13 to 60Su ・JWWA G 115 (Stainless Steel Pipes for Water Supply) Nominal Diameters 13 to 50 ■Applicable Sizes ・Standard Products: Nominal Sizes 13 to 60Su, Nominal Diameters 13 to 50 ・Special Products: Nominal Sizes 20 to 60Su, Nominal Diameters 20 to 50 ■Operating Pressure Range ・0 to 2.0 MPa (some varieties have an operating pressure range of 0 to 1.0 MPa) ・For air applications, less than 0 to 1.0 MPa ■Operating Temperature Range ・Standard Products: 0 to 100℃ ・Special Products: 0 to 130℃ ■Applicable Water Quality ・Water quality standards related to ministerial ordinances (Ministry of Health, Labour and Welfare), water quality guidelines for refrigeration and air conditioning equipment Referencing the "Japan Refrigeration and Air Conditioning Industry Association" and stainless steel association water quality guidelines ■Applicable Air Quality: Compressed Air Quality Grade JIS B 8392-1 Level 2 (Oil Content: Approximately 0.1 ppm) *For more details, please refer to the PDF document or feel free to contact us.
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Applications/Examples of results
【Applications】 ■Standard products: Water supply, hot water, cold water, cooling water, air ■Special products: Steam return pipes, high-temperature water *For more details, please refer to the PDF document or feel free to contact us.
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Company information
Our company is a young organization established on August 1, 2024, as a separate entity from Protearial Co., Ltd.'s piping equipment business. However, its roots can be traced back to Tobata Casting Co., Ltd., which was founded in 1910. When we launched our first product that same year, we cast it with the wish for "greater strength, smoother surfaces, and more beautiful curves," giving rise to the "Hyotan" mark. For over 100 years, we have continued to produce cast products under the testament of tradition and trust. Today, we manufacture and sell not only fittings and valves but also sealed diaphragm expansion tanks, semiconductor flow control devices, and cold water supply equipment. Furthermore, we take pride in our comprehensive capabilities, which improve on-site conditions through our technical expertise, support systems, and quality control measures, enabling us to meet societal needs such as efficient energy use and the realization of a safe and secure society. Although we are a young company, we cherish tradition while continuously providing new value to the industry in line with customer needs and market changes. We are committed to making efforts to meet our customers' expectations in the future, and we sincerely hope for your continued support.