Introduction to SF Double-Shell Tank (Steel & FRP)

Tank with integrated finishing of FRP layer using spray-up method with automatic spray machine.

The "SF Double-Shell Tank (Steel & FRP)" is a tank with a double-shell structure that incorporates a leakage detection device (leak monitor), using steel plates for the inner shell and FRP for the outer shell. The external pressure from soil pressure and water pressure during burial is supported by SS400 steel plates with a tensile strength of 400 MPa and a tensile modulus of elasticity of 206 GPa. When comparing the strength of SS400 and FRP, the GL-5 FRP has a tensile strength of 500 MPa and a tensile modulus of elasticity of 7.5 GPa, which is lower; however, when combined with SS400, it has been found to be less prone to damage even in soil where it bears external pressure from soil and water. 【Features】 ■ Double-shell structure using steel plates for the inner shell and FRP for the outer shell ■ Tank equipped with a leakage detection device (leak monitor) ■ FRP layer finished in an integrated manner using a spray-up method with an automatic spraying machine *For more details, please refer to the PDF document or feel free to contact us.

• tank

A student team from Delft, Netherlands, is developing a bipropellant rocket powered by hydrogen peroxide. In the search for optimal components, KELLER Pressure became involved. Rockets using hydrogen peroxide as a propellant are not new. However, this fuel method has hardly been used since World War II and the early days of space development. "We wanted to recreate this fuel at a student level, in a low-cost and from-scratch development approach. Initially, the goal was simply to 'get it to fly,' but as we progressed, we evolved to the stage of designing a 'flyable vehicle.'" Two types of KELLER Pressure sensors are being used (M5HB for measuring pressure inside the engine and 7LC for measuring the pressure in the hydrogen peroxide and ethanol tanks). These sensors are lightweight, compact, and have excellent material compatibility. Additionally, the fact that the technical specifications are openly published has been appreciated. All necessary information can be checked on the website, allowing for compatibility assessments without needing to contact the sales representative. Communication after the decision to use the products was also smooth. For more details, please check the related links below!

In recent years, we have received numerous requests for extending the lifespan of operational equipment. With the advancement of high functionality in both equipment and components, the specialization of repair services has progressed. Along with this specialization, it has become increasingly difficult to provide comprehensive "repairs" through integrated diagnostics and verification. With the establishment of this service center, we will offer one-stop regeneration and lifespan extension through "comprehensive diagnostics of equipment" by our skilled engineers and the "integration of specialized techniques" from partner engineers located nationwide.

[Nikkou Electric Sendai Sales Office New Year Big Sale] Hello, this is the office staff of the Sendai Sales Office. It's November now. Nikkou Electric Sendai Sales Office will hold a "New Year Big Sale" from January 5, 2026 (Monday) at 10:00 AM to January 15 (Thursday) at 4:00 PM, accepting orders during this period! All products manufactured by JST (Japan Solderless Terminal Manufacturing Co., Ltd.) will be 3% off the regular price. If you're even a little interested, feel free to request a quote! Please do not hesitate to contact us! Inquiries can be made through our company's website contact form or by calling the Nikkou Electric Sendai Sales Office at (0223-34-1121, Attn: Sato).

Insulating oil from old electrical equipment that has been in use for over 30 years may be contaminated with PCBs. Proper disposal is required by the disposal deadline. If you are using a vacuum tube oscillator, please check! - Transformers - Capacitors - Rectifiers, etc. Please consider updating any relevant equipment such as oscillators and hardening equipment as soon as possible. *For more details, please refer to the PDF document or feel free to contact us. ★ For inquiries by phone, please call: Osaka Headquarters → TEL: 072-991-1361 Nagoya → TEL: 052-322-1361 Tokyo → TEL: 03-5472-1361 ★ For inquiries by email, please contact: info@fujidenshi.co.jp *When calling or emailing, please mention that you saw this on "Ipros." Response hours: Monday to Friday, 9 AM to 5 PM.

● This is a leak testing device for small electronic components that does not use fluorinated inert liquids (PFAS-free). ● There is no longer a need for unstable visual confirmation through liquid immersion testing. It adopts a quantitative testing method that allows for stable pressure leak testing. ● It is a tabletop leak testing device specifically for gross leaks, with accuracy equal to or greater than that of liquid immersion testing. ● The detectable range is approximately 1×10⁻² Pa·m³/s to 1×10⁻⁶ Pa·m³/s (varies depending on the target product). ● It is suitable for sealed structures ranging from a few millimeters to a maximum of 80 × 70 mm. Please feel free to contact us for more information!