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Rubber Stopcock
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Rubber · Rubber Stoppers & Seals

Rubber Stopcock

For glass stopcock

Rubber replacement seal for glass stopcocks. Made of NBR or FKM, oil and chemical resistant, ensuring smooth rotation and reliable sealing. Suitable for separatory funnels, burettes, and other glassware with stopcocks.

2 – 10 mmPiston Size
NBR/FKMMaterial
Oil-resistantFeature

Specifications are subject to confirmation with your enquiry.

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Stopcock Plug Seal Separatory Funnel Burette

📐 Features:
Wear-resistant · Oil-resistant · Reliable sealing · Smooth rotation

  • Material — NBR / FKM
  • Specification — For glass stopcock
  • Customization — Available
  • Application — Separatory funnel stopcock sealing
We will follow up on your inquiry as soon as possible. Custom sizes supported Samples available
Specifications

Specifications

Below are Rubber Stopcock standard specifications. Items marked Customizable are available upon request.

Request custom specs
Piston SizeMaterialFeature
2mmNBR/FKMOil-resistant
3mmNBR/FKMOil-resistant
4mmNBR/FKMOil-resistant
5mmNBR/FKMOil-resistant
6mmNBR/FKMOil-resistant
8mmNBR/FKMOil-resistant
10mmNBR/FKMOil-resistant
📌 Customization Notes:
• Custom specifications available
• Special materials or sizes available upon request

Product Description

I. Overview

Rubber replacement seal for glass stopcocks. Made of NBR or FKM, oil and chemical resistant, ensuring smooth rotation and reliable sealing. Suitable for separatory funnels, burettes, and other glassware with stopcocks.

II. Key Features

  • Wear-resistant
  • Oil-resistant
  • Reliable sealing
  • Smooth rotation

Applications

Typical Applications

Separatory funnel stopcock sealing

Burette stopcock sealing

Glass stopcock replacement

Lab glassware maintenance

Applicable Fields

  • Chemistry Labs
  • Biology Labs
  • Teaching Labs
  • Industrial Testing

Selection Guide

I. By Application

  • Separatory funnel stopcock sealing
  • Burette stopcock sealing
  • Glass stopcock replacement
  • Lab glassware maintenance

II. By Material

  • Natural Rubber (NR) — Good elasticity, economical, for general sealing
  • Silicone Rubber (VMQ) — Extreme temperature range, food-grade, medical
  • Nitrile Rubber (NBR) — Oil and chemical resistant, for solvents
  • Fluororubber (FKM) — Resists strong acids/bases, high temp, harsh environments

💡 Selection Tip: Choose the appropriate material and specification based on your specific application and chemical environment. Contact our technical team for guidance.

Operation & Maintenance

User Guide

03

I. Pre-use Preparation

  • Inspect the product for any damage or deformation
  • Verify material and specification match the application environment
04

II. Operation

  1. Select the appropriate product for your needs
  2. Install or use according to standard experimental procedures
  3. Clean or replace after use (disposable items)

Care & Notes

Show care & notes

⚠️ Precautions

  • Special materials (e.g., FKM) are higher cost, select based on need
  • Replace immediately if aging, hardening, or cracking is observed
Do not
  • Avoid exposure to strong oxidizers or temperatures outside material specifications

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Need Rubber Stopcock?

Contact our team for pricing and availability. Custom specifications available.

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Rubber StopcockPiston Size 2 – 10 mm Get a Quote