誠和商会 List of Products and Services

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, 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.**