Vacuum O-Ring Kits by Polypac — Reliable Vacuum Seals for Critical Applications

Polypac Vacuum O-Ring Kits deliver leak-tight, low-outgassing sealing solutions for vacuum systems. Available in NBR, FKM, silicone, EPDM and FFKM, our kits and custom O-rings are backed by advanced testing, large-scale manufacturing and decades of sealing expertise.
Get a free quote
Product Description

Polypac Vacuum O-Ring Kits — Trusted Vacuum Seals

Polypac offers Vacuum O-Ring Kits designed for reliable sealing in laboratory, industrial and research vacuum applications. Our kits include common sizes and popular materials—NBR, FKM, silicone, EPDM and FFKM—ensuring low outgassing, excellent vacuum compatibility and long service life.

Why choose Polypac Vacuum O-Ring Kits?

  • Leak-tight performance: Engineered for low permeation and secure sealing in high- and low-vacuum systems.
  • Material variety: From economical NBR to high-performance FFKM for extreme chemical resistance and ultra-low outgassing.
  • Quality manufacturing: Our custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of factory space and advanced production and testing equipment.
  • Proven expertise: Founded in 2008, Polypac began with filled PTFE products and now supplies a wide range of O-rings backed by collaborations with universities and research institutions.

Practical benefits for your vacuum systems

Polypac Vacuum O-Ring Kits simplify maintenance and prototyping. Each kit contains multiple common cross-sections and diameters so technicians can quickly replace seals, reduce downtime, and maintain system integrity. For sensitive applications, we offer FFKM and silicone options that minimize contamination and meet stringent vacuum performance needs.

Customization and testing

We specialize in custom O-rings for unique vacuum conditions. Whether you need unusual sizes, compound formulations, or seals for thermal cycling and chemical exposure, Polypac provides tailored solutions. All vacuum O-rings undergo rigorous testing—dimensional inspection, hardness, compression set and leak/permeation checks—to ensure consistent performance.

Contact Polypac

For reliable vacuum sealing, choose Polypac Vacuum O-Ring Kits. Contact our technical team to select the right material and kit for your vacuum application or request a custom quotation. Benefit from our manufacturing scale, material expertise, and decades of sealing experience.

Picture Show

  • ORing-Kit 012 Hita  in
  • IMG_E1243
  • ORing-Kit 012Hita ou

Q&A

How do I choose the right material for my sealing application?
Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.
How important is surface finish on the metal parts that contact the seal?
Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.
What is the purpose of the metal spring in a rotary shaft seal?
The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.
What does "AS568" mean?
AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.
Ask for Free Quote Now
Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters
Polypac Industrial Technology Co.,Ltd
No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.
You may also like

Plumbing & HVAC O-Ring Kits012 HITACHI | Assortments for Water, Refrigerant & Gas Connections

Polypac Plumbing & HVAC O-Ring Kits012 HITACHI offer High Quality vacuum and FDA-grade O-Ring assortments for water, refrigerant, and gas connections. Trusted for durability and leak-proof sealing, ideal for plumbing and HVAC systems requiring reliable, high-performance seals.
Plumbing & HVAC O-Ring Kits012 HITACHI | Assortments for Water, Refrigerant & Gas Connections

O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes

O-rings are the most versatile and economical sealing solution for static and dynamic applications.  Our nitrile rubber O-rings offer excellent resistance to petroleum-based oils, fuels, and hydraulic fluids, making them ideal for a wide range of industrial, automotive, and plumbing uses.

O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes

This comprehensive O-ring kit contains the most commonly used sizes and durometers for general maintenance and repair.

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes

O-Rings | Standard & Metric Seals for Hydraulic, Pneumatic & Plumbing

Polypac O-Rings offer durable, high-quality standard and metric seals ideal for hydraulic, pneumatic, and plumbing applications. Our range includes High Quality rubber O-Rings, silicone O-Rings, and comprehensive O-Ring kits for reliable, leak-proof performance in any system.
O-Rings | Standard & Metric Seals for Hydraulic, Pneumatic & Plumbing
Tags
Tubing
Tubing
Hydraulic Cylinder Seal Kit
Hydraulic Cylinder Seal Kit
Food-grade O-rings FDA silicone
Food-grade O-rings FDA silicone
OEM hydraulic cylinder rod seals
OEM hydraulic cylinder rod seals
Contact customer service
×
Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

Request Your Custom Sealing Solution

Fill in your requirements and our team will provide a tailored solution with a quick response.

Your privacy matters to us. We handle your data securely, in compliance with international quality and safety certifications.

With over 10 years of sealing expertise, we are ready to provide you with reliable solutions.

×

Request Your Custom Sealing Solution

Fill in your requirements and our team will provide a tailored solution with a quick response.

Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

Your privacy matters to us. We handle your data securely, in compliance with international quality and safety certifications.

With over 10 years of sealing expertise, we are ready to provide you with reliable solutions.

×
Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

How Can We Help You?

Whether you need product details, technical support, or a custom solution, we’re here to assist.

Your privacy matters to us. We handle your data securely, in compliance with international quality and safety certifications.

With over 10 years of sealing expertise, we are ready to provide you with reliable solutions.

×

How Can We Help You?

Whether you need product details, technical support, or a custom solution, we’re here to assist.

Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

Your privacy matters to us. We handle your data securely, in compliance with international quality and safety certifications.

With over 10 years of sealing expertise, we are ready to provide you with reliable solutions.

×

📩 Looking for sealing solutions?

Start a chat and get quick answers.

Have questions about our products or services? Let’s chat and find the best solution for you.

Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

Your privacy matters to us. We handle your data securely, in compliance with international quality and safety certifications.

With over 10 years of sealing expertise, we are ready to provide you with reliable solutions.