Here are some important points to consider when selecting metal seals such as spring-loaded C-rings! <Materials available upon request>

A high-performance seal manufacturer introduces important points for selecting metal seals such as spring-loaded C-rings.

A high-performance seal manufacturer of seal products such as spring-loaded C-rings, metal seals HELICOFLEXⓇ, and metal hollow O-rings introduces important points for making metal seals functional, as well as key considerations for designers. The selection of metal seals is crucially dependent on the design of the corresponding flanges. The materials of the flanges and bolts, the tightening load (minimum required bolt load during tightening), pressure, temperature, and the method of bolt fastening are all related to the occurrence of insufficient compression in metal seals. ★This document can be viewed immediately by clicking the download button. 【Contents (partial)】 ■ How to make metal seals functional? ■ Seal selection based on allowable leakage rate ■ Compression and recovery of metal seals ■ Bolt load and other factors *For more details, please download the PDF or feel free to contact us.

• Sealing

Excellent leakage tolerance and corrosion resistance! We provide products customized to the sealing characteristics that meet our customers' applications.

The "HELICOFLEX Seal" is a sSpring-energized metal seal developed in collaboration with the French Atomic Energy Commission (CEA). The remarkable performance of this product is the result of years of research and development, experiments, and practical applications in markets such as nuclear energy, aerospace, high vacuum, oil refining/chemicals, gas, and other general industries. With flexible design capabilities, we provide customized products tailored to the sealing characteristics that meet your specific applications. 【Features】 ■ Seal diameter φ4 to 8000mm ■ Pressure range from 10^-10 mbar to 3000 bar ■ Temperature range from -272℃ to 800℃ ■ Acceptable leakage rates that accommodate from foam liquid levels to ultra-high vacuum levels ■ Compatible with all flange standards and flange surfaces (PNEUROP, ASME, ISO, JIS, etc.) *For more details, please refer to the PDF document or feel free to contact us.

• Sealing

It is a metal seal with elasticity! Compatible with RF/FF, T&G, NW/KF, three-face contact type, ICF/conflat, irregular shapes, and rectangular shaped grooves!

The "Spring-energized metal C-Ring HELICOFLEX(R) Seal" demonstrates sealing performance through the plastic deformation of the outer casing and the elasticity of the spring. It is compatible with pressures ranging from 10^-10 mbar to 3000 bar and temperatures from -272℃ to 800℃. It has excellent adaptability to flange shapes and distortions. Materials: Aluminum, silver, copper, nickel, stainless steel, and others. 【Features】 ■ Seal diameter Φ4 to 8000 ■ Cross-section diameter 1.5 to 40 ■ Compatible with pressures from 10^-10 mbar to 3000 bar ■ Compatible with temperatures from -272℃ to 800℃ ■ Highly resistant to radioactivity *For more details, please refer to the PDF document or feel free to contact us.

• Sealing

We introduce C-rings with sections and thicknesses that take into account compressive loads.

The sealing concept of "C-FLEX TM" is the elastic deformation of a metal seal with a C-shaped cross-section. It is compensated by the internal pressure of the equipment to accommodate low design tightening pressure and uneven surfaces of the flange. It is utilized in a wide range of applications, including crude oil extraction, industrial turbines, valves, aerospace, automotive, and SOFC fuel cells (750°C for 40,000 hours). 【Features】 ■ Unique C-shaped cross-section structure ■ Cross-sectional diameter and thickness designed for low tightening pressure ■ Compatible with internal pressure, external pressure, and axial direction ■ Low design tightening pressure ■ Pressure range: from medium vacuum to 200 MPa (2000 bar) ■ Temperature range: -273 to 730°C (-46 to 1350°F) ■ The structure enhances sealing performance by providing auxiliary force from the operating pressure on the equipment side to the C-FLEX. *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements
• Sealing

Section diameter and wall thickness considering design tightening pressure! We offer basic shapes and high-pressure balance types.

"O-FLEX TM" is a metal hollow O-ring with a cross-sectional diameter and wall thickness that takes into account the design tightening pressure (Y value). It can be manufactured for both internal and external pressure, and rectangular shapes are also available. The pressure range is from high vacuum to 500 bar (7,252 PSI), and the temperature range is from -273 to 650°C (-460 to 1200°F). 【Features】 ■ Cross-sectional diameter and wall thickness considering the design tightening pressure (Y value) ■ Can be manufactured for both internal and external pressure ■ Basic type and high-pressure balanced type ■ Rectangular shapes are also available *For more details, please refer to the PDF materials or feel free to contact us.

• Sealing

● 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!

The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact on the base material. Repairs can be carried out in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

We are conducting a productivity improvement special campaign until the end of March 2025. Customers considering upgrading or adding rotary evaporators are encouraged to take advantage of this opportunity. The "Rotary Evaporator R-300," equipped with high-performance control and an electric lift, is available at a campaign price, including accessories such as a foam sensor that enables bumping prevention. Please check the flyer for more details. 【Target Products (Excerpt)】 ■ Rotary Evaporator R-100 ■ Rotary Evaporator R-300 (High-performance control type) ■ PTFE Diaphragm Vacuum Pump V-300 ■ PTFE Diaphragm Vacuum Pump V-600 (High vacuum type)

The non-contact beam touch sensor "HA-T401/HA-T520" has a compact detection range, making it an ideal automatic door sensor for installation on automatic doors facing narrow corridors or busy streets. Depending on the application and installation location, you can choose between "non-vision mounting type" and "non-vision built-in type." 【Features】 ● With the beam touch sensor, you can open and close the automatic door simply by bringing your hand close without touching it, ensuring hygiene. ● Depending on the installation environment, such as single sliding or bi-parting doors, the detection range can be set in four ways: left, center, right, with 4 spots and 12 spots settings. ● Two types of activation row settings are available to reduce unnecessary opening and closing of the automatic door due to cross traffic, contributing to energy-saving effects. ● The touch switch and infrared sensor are integrated, allowing for a switch between beam touch and infrared sensor modes with a single model. 【Recommended for such places!】 ☑ Entrances facing busy corridors ☑ Counters or signs near the door ☑ Buildings facing narrow corridors ☑ Buildings that prioritize aesthetics ☑ Hospitals and facilities that consider hygiene ☑ Large facilities with many doors ◎ For more details, please download the materials or contact us.

■7,744 yen (trial price) The assist suit "Second Generation Rakuemon" will be offered at a more affordable price of 7,744 yen (trial price). Rakuemon will continue to strive to maintain and improve quality, providing products that satisfy our customers. ■Product: Assist Suit "Second Generation Rakuemon" ■Implementation Date: July 7, 2025 ■Trial Price: 7,744 yen (including tax)