COP Double Acting Pneumatic Seal for SC Cylinder and NPA Air Valve

COP (OPA) Pneumatic Seal

Product Overview

The COP (OPA) pneumatic seal is a piston seal designed specifically for small-bore pneumatic cylinders. Its key advantages are low friction, compact fit, and compatibility with multiple media. Compared with O-rings, it offers better friction characteristics and is suitable for standard cylinders, small-bore cylinders, and compact cylinders. Material is indicated by color for quick identification: brown-red for FKM (fluororubber) and black for NBR (nitrile rubber).

COP (OPA) Pneumatic Piston Seal

Installation: These pneumatic seals can be easily slipped over the piston and seated into the groove. To avoid seal damage, take measures to avoid sharp edges during installation. For oil-free lubrication, it is important to have a continuous lubricating film on the sealing surface. This should be done before assembly to ensure long seal life.

TPU Hydraulic Piston Seal

Product Details

Surface Finish
High-quality seals with a smooth, glossy finish and no burrs.

Material

Selected European and American raw materials — ensuring consistent performance in every product

Full Range of Sizes and Customization
With over 30,000 products in stock and exports to more than 30 countries, we offer a full range of sizes and models to meet your needs across agriculture, industry, and manufacturing — plus design, cutting, and production for non-standard custom parts.

Newly Upgraded FFKM COP Seals — Quality Assured, No Defective Products Accepted

Multi-Stage Quality Inspection and Professional Certification

Every product goes through multiple inspection stages against high quality standards and is certified by accredited testing organizations, ensuring consistent and reliable performance.

Applications for pneumatic seals

COP (OPA) pneumatic seals are designed for piston sealing in small-bore pneumatic cylinders, standard cylinders, small-diameter cylinders, and compact cylinders. They are widely used in industrial automation, packaging machinery, material handling, robotics, automotive assembly, food and beverage equipment, agricultural machinery, and general manufacturing. With low-friction performance, they serve as an effective O-ring alternative and are compatible with oil-lubricated air, dry air, and oil-free air — ideal for compact cylinder seals, low-friction piston seals, and long-life pneumatic sealing applications. Available in NBR, FKM, and FFKM materials, with support for custom non-standard seals, seal kits, and volume OEM supply, meeting the sourcing needs of European and American customers for pneumatic cylinder seals, piston seals, air cylinder seal kits, small-bore cylinder seals, and custom sealing solutions.

JINNAI SEAL FACTORY

Our Advantages

Product Advantages
We offer more than 30,000 seal products, including COP (OPA) pneumatic piston seals in NBR, FKM, and FFKM. These seals feature low friction, precise dimensions, a full range of sizes, easy installation, and long service life. They are an effective O-ring alternative for small-bore, compact, and standard cylinders, with custom design, cutting, and production available for non-standard parts.

Factory Advantages
We use European and American raw materials, maintain ample stock, and have complete design, production, and supply capabilities. Our products are exported to more than 30 countries and serve agriculture, industry, manufacturing, and other sectors, with multi-stage inspection ensuring consistent performance in every product.

Certification Advantages
Our quality management system is certified to ISO 9001, and we are also certified to IATF 16949, demonstrating our commitment to consistent quality and reliable performance for automotive and industrial sealing applications.

After-Sales Service
We provide responsive after-sales support, technical selection assistance, customized sealing solutions, and stable long-term supply to meet the ongoing needs of our customers.

Packing & Payment & Shipping

• Package:We provide standard cartons, pallets and wooden cases. Custom packaging such as custom logo print is available upon request to protect goods well for different shipments.
• Payment Methods:Multi-currency settlement (CNY, USD, EUR, etc.). Multiple payment options including T/T, PayPal. Local bank transfer is available for some countries for faster transactions.
• Shipping Ways:We offer international express, air freight, sea freight and railway transport. You can also appoint your own forwarder for flexible delivery arrangements.

One-stop rubber seal service from reliable manufacturer

Equipped with automated production lines and in-house molding capability, we manufacture a full range of rubber sealing components in EPDM, NBR, FKM,FFKM,HNBR,PU,VMQ,SIL,PTFE ect. From standard parts to custom special-shaped components, each product is built to your specifications.

What We Produce:

• O-rings — standard series and custom sizes
• Rubber balls — solid rubber balls from 1mm to 500mm and custom support
• Gaskets, washers & flat seals — molded or die-cut
• Oil seals — rotary shaft and lip seals
• Custom special-shaped rubber seals — made to your drawing or sample