誠和商会 Product Lineup

This catalog introduces the "O-Rings" from GMORS, handled by Seiwa Shokai Co., Ltd. We are equipped with molds for sizes that meet Japanese Industrial Standards and automotive industry standards. Orders for inch sizes and non-standard sizes are also possible. Please use this information to assist in selecting products. 【Contents (excerpt)】 ■ About GMORS (Company Overview, History, GMORS Materials) ■ GMORS Product Information ■ GMORS Sales Achievements ■ Material Table: JIS K 6301 standard values for standard O-ring materials / Measured values for GMORS O-ring materials ■ Basic O-ring Materials *For more details, please refer to the PDF document or feel free to contact us.

Introducing the "O-Ring" from GMORS, handled by Seiwa Shokai Co., Ltd. We are equipped with molds for sizes that meet Japanese Industrial Standards and automotive industry standards. Custom orders for inch sizes and non-standard sizes are also possible. Please use this information to assist in selecting products. 【Contents (Excerpt)】 ■ O-RING Dimension Table ■ Applicable Materials - JIS Symbol: NBR70-1 (Former JIS Symbol: Type A) → GMOUS Symbol: 1A - JIS Symbol: NBR90 (Former JIS Symbol: Type B) → GMOUS Symbol: 1B - JIS Symbol: NBR70-2 (Former JIS Symbol: Type 2) → GMOUS Symbol: 2A - JIS Symbol: VMQ70 (Former JIS Symbol: Type C) → GMOUS Symbol: 4C - JIS Symbol: FKM70 (Former JIS Symbol: Type D) → GMOUS Symbol: 4D *For more details, please refer to the PDF document or feel free to contact us.

Our company offers a wide range of O-rings made from various materials of Applied Seals' perfluoroelastomer compound "PERFREZ." We can manufacture O-rings using various materials such as "PERFREZ 9071," which has excellent resistance to highly corrosive chemicals like acids and bases, and "PERFREZ 9001," which can be used from -10°C to 300°C and has very low compression set at high temperatures. We can accommodate maximum outer diameters of up to 1,350mm and offer made-to-order production for small lots. 【Features】 ■ Capable of manufacturing O-rings for use in high-temperature, high-pressure environments and environments exposed to chemicals ■ Compatible with a wide range of highly corrosive chemicals such as acids, amines, and ketones ■ Material options available that can be used at temperatures up to 320°C ■ Custom molding available to meet specific size and shape requirements ■ Easy estimation with a sheet that includes details about the equipment used and environmental temperature *For more details, please refer to the materials. Feel free to contact us with any inquiries.

We offer a wide variety of O-rings made from various materials of Applied Seals' perfluoroelastomer compound "PERFREZ." Currently, there is a shortage of rubber raw materials, which has been causing longer delivery times than usual, leading to an increase in inquiries regarding this issue. We can also suggest materials based on the type of chemicals used and the operating environment! We can accommodate maximum outer diameters of up to 1,350mm and accept orders for small lots. *We also handle nitrile (NBR), fluoropolymer (FKM), silicone, and ethylene (EPDM) materials. Please check our comprehensive catalog. 【Features】 ■ Products that can be used from -10℃ to 300℃ with very low compression set at high temperatures! ■ O-rings can be manufactured for use in high-temperature, high-pressure environments, or environments exposed to chemicals. ■ Compatible with a wide range of highly corrosive chemicals such as acids, amines, and ketones. ■ Materials that can be used up to 320℃ are also available. ■ Molding processing can be customized to meet size and shape requirements. ■ We provide a simple estimate sheet that can be filled out with details about the equipment used and environmental temperatures. *For more details, please refer to the materials. Feel free to contact us with any inquiries.

This catalog introduces the "O-Rings (Buna-N material FKM)" from GMORS, handled by Seiwa Shokai Co., Ltd. We are equipped with molds for Japanese Industrial Standards and automotive industry standard sizes. Orders for inch sizes and non-standard sizes are also possible. We are here to help solve your material shortage issues. *Please use the catalog to assist in product selection. ■Supported Standards - P Series - G Series - V Series - S Series - AS568 Series *For more details, please refer to the PDF document or feel free to contact us.

This catalog introduces the "O-Rings" from GMORS Corporation, handled by Seiwa Shokai Co., Ltd. GMORS Corporation's O-Rings (made of NBR material) comply with the Food Sanitation Act. *If necessary, we can provide a report confirming compliance with the Food Sanitation Act. 【Features】 - Compliant with the Food Sanitation Act - Equipped with molds for Japanese Industrial Standards and automotive industry standard sizes. - Custom sizes in inch measurements and non-standard sizes are also available. 【Applicable Standards】 - P Series - G Series - V Series - S Series - AS568 Series We are here to help solve your material shortage issues. *Please use the catalog to assist in product selection. *For more details, please refer to the PDF materials or feel free to contact us.

This catalog introduces the "O-Rings" from GMORS Corporation, handled by Seiwa Shokai Co., Ltd. GMORS Corporation's O-Rings (made of silicone) comply with the Food Sanitation Act. *If necessary, we can provide a report confirming compliance with the Food Sanitation Act. 【Features】 - Compliant with the Food Sanitation Act - Equipped with molds for Japanese Industrial Standards and automotive industry standards sizes. - Custom production of inch sizes and non-standard sizes is also possible. 【Applicable Standards】 - P Series - G Series - V Series - S Series - AS568 Series We are here to help solve your material shortage issues. *Please use the catalog to assist in product selection. *For more details, please refer to the PDF materials or feel free to contact us.

This catalog introduces the "O-Rings" from GMORS Corporation, handled by Seiwa Shokai Co., Ltd. GMORS's O-Rings (made of EPDM material) comply with the Food Sanitation Act. *If necessary, we can provide a report confirming compliance with the Food Sanitation Act. 【Features】 - Compliance with the Food Sanitation Act - Complete molds for Japanese Industrial Standards and automotive industry standards sizes. - Custom production of inch sizes and non-standard sizes is also possible. 【Applicable Standards】 - P Series - G Series - V Series - S Series - AS568 Series We are here to help solve your material shortage issues. *Please use the catalog to assist in product selection. *For more details, please refer to the PDF materials or feel free to contact us.

We handle FFKM O-rings 'PERFREZ' that are resistant to highly corrosive chemicals, high temperatures, and steam, providing stable performance over long periods. We can offer them in small quantities with stable prices and delivery times. We contribute to solving design and procurement challenges. 【We solve the following issues】 ◎ The delivery times and prices of the O-rings (sealing materials) currently in use are unstable. ◎ Cannot find products with the necessary characteristics and sizes. ◎ Want to order in small quantities but keep costs down. We have materials compliant with food sanitation laws and FDA regulations available. We also have materials (NBR, FKM) that comply with food sanitation laws and FDA regulations. *You can view the chemical properties of the products by downloading the catalog. For quotes, please refer to the materials and request through the contact form.

This catalog introduces the "O-Rings" from GMORS Corporation, handled by Seiwa Shokai Co., Ltd. GMORS's O-Rings (made of EPDM) comply with the Food Sanitation Act and can be used in food processing machines and food packaging machines. *If necessary, we can provide a report compliant with the Food Sanitation Act. We have molds for Japanese Industrial Standards and automotive industry standards, and we can also produce inch sizes and non-standard sizes. 【Materials】 ■NBR ■FKM ■Silicone ■EPDM We are here to help solve your material shortage issues. *Please use the catalog to assist in product selection. *For more details, please refer to the PDF materials or feel free to contact us.

Components such as "O-rings," "packings," and "gaskets" belong to the category collectively referred to as "seals." "Seals" are a general term for parts and devices that prevent foreign substances from entering and fluids from leaking out. Although sealing materials are consumables, they play an important role in factories and daily life. The O-rings (made of EPDM, silicone, and NBR) from GMORS, which we handle at Seiwa Shokai, comply with food sanitation laws and can be used in food processing machinery and food packaging machinery. If you are having trouble understanding how to choose seals for specific applications, please feel free to contact us. We are currently offering a seal product selection chart. *For more details, please refer to the PDF materials or feel free to contact us.

We would like to introduce GMORS's "High-Performance PTFE Coating Technology." This technology is a dry film that effectively reduces friction on the surface of sealing materials without the need for conventional liquid lubricants. The coating, which is only a few microns thick, not only alters the surface properties but also helps prevent stick-slip phenomena. Additionally, we have included past case studies in our catalog, so please feel free to download and take a look. 【Benefits of Using PTFE】 ■ Can reduce the static friction coefficient by over 70% with various types of rubber materials ■ Prevention of stick-slip phenomena ■ Improvement in friction reduces issues such as sticking, twisting, and bursting of sealing materials that occur in automated assembly lines ■ Coloring is possible, which aids in identification ★ Compliant with the Food Sanitation Act! * For more details, please refer to the PDF materials or feel free to contact us.

Recently, we have been receiving more inquiries about wanting O-rings made from materials that comply with the Food Sanitation Act and have FDA certification. At GMORS, the company we represent, we can provide materials that have obtained Food Sanitation Act and FDA certification in NBR (nitrile), FKM (fluoroelastomer), silicone, and EPDM. We have compiled examples of proposals for our customers into a PDF document. Please take a look at the PDF, and if you have any concerns, feel free to contact us.

Company A has been supplying products to users in the semiconductor industry. Among the products for users, FFKM material O-rings from overseas manufacturers are being used. Although an order was placed with the supplier (Company B), we received a response stating, "Orders in small lots are not possible, and even if we can accept the order, the delivery time will be over a year." As a result, we were contacted by your company, and we proposed a replacement by asking for the current material number and manufacturer. At the same time, we suggested that the users conduct tests. [Case Summary (Partial)] ■ Issues - An order was placed with the supplier (Company B), but it will not meet the user's delivery schedule. - Orders in small lots are not possible, and we cannot hold excess inventory. ■ Proposal - Replacement products for the materials currently used by the users. - We would like the users to conduct tests before adoption. *For more details, please refer to the PDF document or feel free to contact us.

A certain raw materials manufacturer has announced that it will withdraw from PFAS production by the end of 2025. It is expected that the withdrawal of this manufacturer will lead to a serious shortage of materials in the market. In fact, we have seen an increase in inquiries from our customers about products that use manufacturers other than this particular raw materials supplier. This catalog introduces the 'O-Rings (Buna-N, FKM, Fluoroelastomer)' from GMORS, which is handled by Seiwa Shokai Co., Ltd. By purchasing GMOS O-Rings from us, we believe we can help alleviate future supply concerns. [Reasons for Feasibility] - GMOS sources its products from suppliers other than the aforementioned raw materials manufacturer. - We are able to manage inventory, so if you provide us with information, we can prepare for immediate delivery. [Customer Feedback] - It has led to a reduction in costs from current purchase prices. - Since they hold inventory, there is no longer worry about the availability of materials in the market. *For more details, please refer to the PDF document or feel free to contact us.

In the petrochemical industry, high resistance to chemical substances is required. The degradation of sealing materials can lead to equipment downtime and decreased safety. PERFREZ O-rings are resistant to the erosion of highly corrosive chemicals and maintain stable performance over a long period. With stable pricing and delivery times, we contribute to solving our customers' design and procurement challenges. 【Application Scenarios】 - Chemical plants - Chemical manufacturing equipment - Piping systems 【Benefits of Implementation】 - Suppression of degradation due to chemicals - Improved equipment operating rates - Assurance of safety

In the medical device industry, high cleanliness is required to ensure the safety and reliability of products. Particularly in medical devices that may come into contact with blood or bodily fluids, the leaching of substances from sealing materials such as O-rings can be a concern. PERFREZ O-rings possess high chemical resistance and heat resistance, making them suitable for use in clean environments. This contributes to maintaining the performance and enhancing the safety of medical devices. 【Application Scenarios】 - Connections of medical tubes - Seals for analytical instruments - Seals for liquid supply systems 【Benefits of Implementation】 - Improved product safety due to high cleanliness - Long-term performance maintenance due to chemical resistance - Cost management through stable pricing and delivery times

In the automotive industry, the durability of components exposed to high temperatures, high pressures, and chemical substances, such as engines and transmissions, is crucial. The degradation of O-rings can lead to oil leaks and malfunctions, potentially shortening the product's lifespan. PERFREZ maintains stable performance even in these harsh environments, enhancing the reliability of automotive parts. 【Usage Scenarios】 - Seals inside the engine - Seals for transmissions - Seals for brake systems 【Benefits of Implementation】 - Extended component replacement cycles due to high durability - Performance maintenance through oil leak prevention - Improved product reliability

In the food industry, the non-contaminating nature of sealing materials is crucial to ensure product safety. Particularly in environments exposed to high temperatures, high pressures, and chemicals, the deterioration of O-rings and the risk of foreign matter contamination can become problematic. PERFREZ O-rings excel in chemical resistance and heat resistance, and materials compliant with food hygiene laws and FDA standards are also available, enhancing safety in the food manufacturing process. 【Application Scenarios】 - Food manufacturing machinery - Filling machines - Packaging machines 【Benefits of Implementation】 - Reduced risk of foreign matter contamination - Maintenance of product quality - Stable operation of equipment

In the pharmaceutical industry, the inertness of sealing materials is crucial for maintaining product quality. In particular, it is essential that the material of O-rings does not react when in contact with chemicals used in drug solutions and manufacturing processes. Inappropriate sealing materials can lead to product contamination and quality degradation. Our PERFREZ O-rings are resistant to corrosion from highly corrosive chemicals and provide stable performance over long periods. They are available in small quantities with stable pricing and delivery times. 【Application Scenarios】 - Drug filling equipment - Reaction vessels - Cleaning devices 【Benefits of Implementation】 - High resistance to drug solutions - Maintenance of product quality - Cost reduction through stable supply

In the energy industry, stable operation of equipment under high pressure and high temperature conditions is essential. Particularly in oil and gas plants and power stations, the performance of sealing materials significantly impacts safety and efficiency. Seal failures can lead to accidents due to leaks or equipment shutdowns. PERFREZ O-rings demonstrate excellent sealing performance even in high-temperature and high-pressure environments, contributing to the stable operation of equipment. [Application Scenarios] - Oil and gas plants - Power stations - Heat exchangers - High-pressure piping [Benefits of Implementation] - Reduced leak risk due to high pressure resistance - Achieving long-term stable operation - Lower maintenance costs for equipment - Improved safety

In the analytical instrument industry, the reliability of sealing materials is crucial for obtaining high-precision measurement results. Particularly in analytical instruments that handle trace samples, contamination from sealing materials or the use of sealing materials with low chemical resistance can potentially degrade the accuracy of measurement results. PERFREZ is an FFKM O-ring that is resistant to highly corrosive chemicals, high temperatures, and steam, providing stable performance over a long period. It is available in small quantities with stable pricing and delivery times, contributing to solving design and procurement challenges. 【Application Scenarios】 - Sealing inside analytical instruments - Chemical supply lines - Sealing in high-temperature environments 【Benefits of Implementation】 - Improved reliability of measurement results due to high chemical resistance - Long-term stable operation - Cost reduction through small lot availability

In the clean environment of the LCD manufacturing industry, preventing foreign matter contamination and achieving high sealing performance are essential. In particular, the degradation of O-rings due to chemicals used in the manufacturing process and high-temperature environments can lead to a decline in product quality and potential stoppages on the production line. PERFREZ contributes to long-term stable operation in clean environments with its excellent chemical resistance and heat resistance. 【Usage Scenarios】 - LCD manufacturing equipment - Sealing applications in clean rooms - Chemical supply lines 【Benefits of Implementation】 - Reduction of foreign matter contamination risks - Achievement of long-term stable operation - Improvement of product quality

In the chemical plant industry, ensuring the long-term operation and safety of equipment is crucial. Resistance to highly corrosive chemicals is an essential factor for O-rings, and selecting the appropriate sealing material is necessary to prevent leaks and failures, thereby avoiding losses due to operational downtime. PERFREZ O-rings are resistant to the erosion of highly corrosive chemicals and provide stable performance over a long period, supporting the safe operation of chemical plants. 【Application Scenarios】 - Piping handling chemical substances - Reaction vessels - Various valves 【Benefits of Implementation】 - Suppression of O-ring deterioration due to corrosion - Long-term stable operation of equipment - Reduction of maintenance costs

In the field of marine development, components that can withstand harsh environments such as water pressure, corrosive seawater, and temperature fluctuations are required. In particular, sealing materials like O-rings play a crucial role in maintaining equipment performance, and high water resistance and durability are essential. PERFREZ excels in resistance to high temperatures, high pressures, and chemicals, demonstrating stable performance over the long term in various applications within marine development. 【Usage Scenarios】 - Underwater equipment - Marine survey instruments - Various devices requiring water resistance 【Benefits of Implementation】 - Improved reliability of equipment due to high water resistance - Long-term stable sealing performance - Increased operational rates of equipment in harsh environments

In the petrochemical industry, O-rings with high resistance to chemicals are in demand. In particular, O-rings used in plants and manufacturing processes play a crucial role in preventing degradation and damage from chemicals, supporting safe operations. Concerns about a supply shortage of O-rings have arisen due to a certain raw material manufacturer's withdrawal from PFAS production, but O-rings from GMORS ensure stable supply by securing alternative sources. By purchasing GMORS O-rings from us, we believe we can help alleviate future supply concerns. 【Usage Scenarios】 - Chemical plants - Pharmaceutical manufacturing processes - Various piping - Reaction vessels 【Benefits of Implementation】 - Reduction of supply risks due to PFAS issues - Improved product lifespan due to chemical resistance - Establishment of a stable supply system - Potential cost reduction

In the chemical plant industry, high resistance to corrosive chemicals is required. In particular, the deterioration of sealing materials can lead to plant shutdowns and reduced safety. Our fluororubber O-rings excel in chemical resistance and contribute to long-term use in corrosive environments. O-rings manufactured by GMORS mitigate the risk of supply shortages due to the withdrawal from PFAS production, ensuring a stable supply. 【Application Scenarios】 - Sealing for pipes and tanks handling chemical substances - Prevention of leakage of corrosive gases and liquids - Sealing in high-temperature environments 【Benefits of Implementation】 - Improved plant operating rates - Ensured safety - Reduced maintenance costs

〇Concerns - As 2026 begins, I have had more opportunities to hear from various people that "this year the semiconductor industry will be busy." Our company is concerned that the poor availability of rubber parts that occurred a few years ago may impact production. 〇Countermeasures - We would like you to consider adopting "GMORS," which we represent as an agency. → Our company is the only one in the country that holds stock of this manufacturer's parts. If we can discuss your planned usage, we can also hold stock specifically for your company. 〇Effects - Avoid situations where production cannot occur due to unavailability of parts. - Stabilize the supply chain. Please note that if you consult us after parts have run out, the manufacturer's policy may prevent us from accepting new inquiries. We would appreciate your consideration in advance. **For more details, please download the materials or feel free to contact us.**