A Brief Overview of Welch Syringe Filters and Membranes

  • Designed to provide high-performance filtration, delivering contaminant-free samples ideal for precise analytical testing and research applications.
  • A wide range of membrane materials is available, including PES, PTFE, PVDF, PP, Nylon, CA, GF, RC, etc.
  • Pore sizes selectable from 0.22 μm, 0.45 μm, 0.7 μm (GF) and 1.0 μm (GF), meeting your various laboratory needs.
  • Optimal high flow rates and throughput capacities, effective for rapid sample preparation and processing.
  • Compatible with a wide range of HPLC and GC systems from various manufacturers.
  • Shipped globally and directly from our warehouses in China
Discover the Right Syringe Filter for Your Analytical Needs – Shop Now!

INNOVATIVE | REPRODUCIBLE | RUGGED

Nylon Syringe Filter

Broad chemical compatibility, high mechanical and tensile strength.

Ideal for a wide range of general laboratory applications.

Since nylon binds protein, it is not recommended when high protein recovery is required.

Dimension: ⌀ 13 mm, ⌀ 25 mm, ⌀ 33 mm.

Pore size: 0.22 μm, 0.45 μm.

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PTFE Syringe Filter

Excellent chemical resistance and inertness.

Commonly applicable for filtering biological samples, corrosive chemicals, and strong acids and bases.

Comes in hydrophobic and hydrophilic variants.

Dimension: ⌀ 13 mm, ⌀ 25 mm, ⌀ 33 mm.

Pore size: 0.22 μm, 0.45 μm.

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PVDF Syringe Filter

Comes in hydrophobic and hydrophilic variants.

High chemical stability and thermal stability (~140 ℃).

Widely used in the production of biological drugs and vaccines for the purification and filtration of drugs.

Dimension: ⌀ 13 mm, ⌀ 25 mm, ⌀ 33 mm.

Pore size: 0.22 μm, 0.45 μm.

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CA (Cellulose Acetate) Syringe Filter

Ideally suited for biological analysis and aqueous solutions that require maximum protein recovery. Suitable for capturing and culturing microorganisms in water.

High thermal stability (up to 180 ℃) and flow rate.

Limited resistance to solvents and can degrade under acid or basic conditions.

Dimension: ⌀ 13 mm, ⌀ 25 mm, ⌀ 33 mm.

Pore size: 0.22 μm, 0.45 μm.

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GF (Glass Fiber) Syringe Filter

Good mechanical strength. Highly durable.

Features large pore sizes, making it ideal for high particulate particles.

Less effective for filtering fine particles.

Dimension: ⌀ 13 mm, ⌀ 25 mm.

Pore size: 0.7 μm, 1.0 μm.

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Other Available Filter Materials

  • PES (Polyethersulfone)

    Fine chemical stability and thermal stability. Suitable for biomedical and pharmaceutical settings.

    Dimension: ⌀ 13 mm, ⌀ 25 mm, ⌀ 33 mm.

    Pore size: 0.22 μm, 0.45 μm.

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  • MCE (Mixed Cellulose Ester)

    Best for capturing and culturing microoranisms in the water and waste water industry.

    Dimension: ⌀ 13 mm, ⌀ 25 mm, ⌀ 33 mm.

    Pore size: 0.22 μm, 0.45 μm.

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  • PP (Polypropylene)

    Commonly used for general laboratory filtration where high chemical resistance is not critical.

    Dimension: ⌀ 13 mm, ⌀ 25 mm, ⌀ 33 mm.

    Pore size: 0.22 μm, 0.45 μm.

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  • RC (Regenerated Cellulose)

    Perfect choice for biomolecule solutions and other dissolved substances.

    Dimension: ⌀ 13 mm, ⌀ 25 mm, ⌀ 33 mm.

    Pore size: 0.22 μm, 0.45 μm.

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Sterile Syringe Filters Are Also Available

Individually packed.

Materials available from Nylon, PES, MCE, PTFE, PVDF, CA, PP, GF, and RC.

100% intergrity tested.

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Frequently Asked Questions

Price and Payment

Are the prices listed on your website FOB prices?
Yes, unless otherwise noted, all prices are quoted on an FOB basis.

Is there a minimum order quantity (MOQ)?
Yes, a minimum order quantity applies. Please contact us for details before placing your order.

What payment methods do you accept?
We accept major credit cards, PayPal, and a variety of other secure payment options. Please contact us to confirm if your payment method can be accepted.

Do you offer discounts for bulk purchases?
Yes, we provide volume-based discounts for bulk orders. For more information, please contact us if you are interested in placing a large order.

Do you offer discounts for repeat customers?
Yes, we offer discounts and special offers for our regular customers. Please contact us for more details on how to enroll.

Product and Quality

Can I request product samples before placing a large order?
Yes, we offer samples for many of our products. Please contact our sales team to inquire about availability and shipping costs.

Do you offer customization options for your products?
We offer customization services for select products, including packaging, branding, and specific dimensions, etc. Please contact us with your requirements to discuss possibilities.

How do you ensure the quality of your products?

As an ISO-9001 certified manufacturer, our products undergo stringent quality control checks at various stages of production to ensure they meet industry standards and our high-quality expectations.

What should I do if a product I want is out of stock?
Out-of-stock products are not necessarily unavailable. Please contact us to confirm the availability before placing your order.

Shipping Internationally

Do you ship internationally?
Yes, we provide international shipping to most countries. Shipping costs and delivery times vary based on your location.

Where will my order be shipped from?
All orders are dispatched from our warehouses in China.

How are shipping costs calculated?
Shipping costs are determined by the weight and dimensions of your order, as well as the shipping destination. Exact shipping costs are displayed on the quote from our sales team.

What if I need expedited shipping?
Expedited shipping is only available if we have stock for your requirements and shipping methods available.

Can I request specific shipping carriers for my order?
Yes, if you have a preferred shipping carrier, please notify us when placing your order, and we will accommodate your request where possible.

Will I need to handle customs clearance?
Depending on the shipping terms, you may need to manage customs clearance. For orders on FOB/CNF terms, you are responsible for customs clearance. However, for DDP terms, we handle customs clearance and deliver the goods directly to you. Please contact us for further details.

Do you provide documentation for customs clearance?
Yes, we supply all required documentation, including invoices, packing lists, and certificates of origin, to facilitate customs clearance. Please inform us if any specific documents are needed.

Customer Service

What are your business hours?
Our customer service and sales teams are available Monday through Friday, 9 AM to 6 PM (China Standard Time). Inquiries outside these hours will be addressed within 24 hours.

How can I track my order?
After your order is shipped, you will receive a confirmation email containing a tracking number. This number can be used to monitor your shipment on the carrier’s website.

How long will delivery take?
Orders are processed within 1-2 business days. Delivery times depend on your location and the shipping method chosen. We will provide you an estimated lead time when you confirm your order.

How do I contact customer service?
You can reach our customer service team via email at inquiry@welchmat.com, through the contact form on our website, or via Live Chat. We aim to respond within 24 hours.

Aftersale Service

Can I cancel or modify my order after it has been placed?
Cancellation or order modification are not available once we begin to prepare to manufacture the products. You may change shipping information only before the production is finished.

What is your return policy?
Due to the cost of international shipping, returns are not available unless there is an issue with product quality or you received incorrect item(s).

What should I do if I receive a damaged or incorrect item?
If you receive a damaged or incorrect item, please contact us immediately with your order number and a photo of the item. We will arrange for a replacement or refund promptly.

Do you provide technical support for your products?
Yes, we have a technical support team available to assist with product usage, troubleshooting, and recommendations. Feel free to reach out to us for technical inquiries.

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Still Have Questions? Contact WelchLab Now!