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Precision Sealing & Machining Solutions

Zhejiang Smart Sealing Co., Ltd. – Leading manufacturer of industrial seals, packings, gaskets, PTFE products, lapping machines, and precision etching shims in China. Trusted by global partners for over a decade.

Explore Our Products
Spiral Wound Gasket Machine Factory Overview PTFE Products Lapping Machine Winding Machine Sealing Components

About Smart Sealing

Zhejiang Smart Sealing Co., Ltd. is a professional manufacturer located in Hangzhou, Zhejiang, China — just minutes from the scenic West Lake and Hangzhou International Airport. Our strategic location ensures fast logistics and seamless global delivery.

We specialize in the design and production of high-performance sealing components including spiral wound gaskets, metal jacketed gaskets, PTFE packings, graphite seals, non-asbestos sheets, rubber gaskets, and precision etching shims. Our advanced machinery line supports both in-house manufacturing and OEM solutions.

With a strong focus on innovation and quality control, we serve industries such as oil & gas, chemical processing, power generation, automotive, and aerospace. Our products meet international standards and are exported to over 50 countries.

10+
Years Experience
50+
Countries Served
200+
Industrial Clients
Smart Sealing Factory

State-of-the-art manufacturing facility in Hangzhou, China

Our Products

From sealing materials to fully automated machinery, we offer a comprehensive range of industrial solutions designed for durability, precision, and performance.

SMT-PX-2500C Winding Machine

SMT-PX-2500C Semi-Auto Winder

Improved model with PLC size control and automatic spot welding. Suitable for ID 300mm–3200mm spiral wound gaskets. Supports 4.5mm thickness (also 3.2mm, 6.4mm, 7.2mm with roller change).

Machines for Gaskets
SMT-PX500C Automatic Winding Machine

SMT-PX500C Automatic Winder

Newest design with full automation: PLC size control, SS strip forming roller, automatic spot welding, and automatic SS strip cutting. Top-tier performance in China.

Sealing Machinery
Lapping Machine

Single Sided Lapping Machine

High-precision machine for surface finishing of sealing rings and components. Ensures flatness and smooth finish for optimal sealing performance.

Lapping Equipment
PTFE Yarn

PTFE/Graphite Yarn SMT-814

High-strength, chemically resistant yarn ideal for braided packings and seals in aggressive environments. Excellent thermal stability up to 260°C.

Raw Material
Expanded PTFE Tape

Expanded PTFE Joint Sealant SMT-325

Flexible, non-stick tape/rope for pipe thread sealing. Resistant to extreme temperatures and corrosive chemicals. Ideal for maintenance and OEM applications.

PTFE Product
Ring Bending Machine

SMT-PX2000D-2 Ring Bender

Semi-automatic horizontal ring bending machine for SWG inner and outer rings. Features PLC size control and automatic cutter for fast, continuous processing.

Gasket Machinery
Polishing Machine

Polishing Machine PX1250

Designed to polish the surface of spiral wound gasket inner and outer rings. Ensures smooth finish and dimensional accuracy for critical sealing applications.

Finishing Equipment
U Slotted Shims

U Slotted Shims SMT-610

Precision stainless steel U-slotted shims used primarily for wheel alignment. Available in various thicknesses with high corrosion resistance and durability.

Etching Shims
Blister Packaging Machine

Blister Packaging Machine SMT-5218

Vacuum packages small gaskets in a clean, convenient, and visually appealing way. Customizable film width based on customer requirements.

Packaging Solution
Graphite Packing

Graphite Packings

High-performance flexible graphite packings for pumps, valves, and rotating equipment. Excellent thermal conductivity and chemical resistance.

Sealing Materials

Why Choose Smart Sealing?

We combine cutting-edge technology, strict quality control, and customer-first service to deliver reliable sealing solutions worldwide.

Certified Quality

All products undergo rigorous testing and meet international standards including ISO, API, and ASME. Full traceability and documentation provided.

Fast Global Delivery

Strategically located near Hangzhou International Airport for rapid export. DHL, FedEx, and sea freight options available.

OEM & Custom Solutions

We support custom designs, private labeling, and engineering collaboration. From prototype to mass production — we’ve got you covered.

100K+
Units Produced Annually
50+
Countries Served
200+
Industrial Clients
15+
Machinery Models

Frequently Asked Questions

Where is your factory located?

Our factory is located in Yanghu Industrial Zone, Xiaoshan, Hangzhou, Zhejiang, China — just 30 minutes from Hangzhou International Airport.

Do you offer OEM services?

Yes, we provide full OEM and ODM services including custom packaging, branding, and product design based on your specifications.

What are your main export markets?

Our products are exported to North America, Europe, Southeast Asia, the Middle East, and Australia.

Can I get samples before placing an order?

Yes, we offer free samples for qualified buyers. Shipping costs may apply depending on destination.

What payment methods do you accept?

We accept T/T (Telegraphic Transfer), L/C (Letter of Credit), and Western Union. Terms negotiable based on order volume.

Get in Touch

Reach out to our team for product inquiries, technical support, or partnership opportunities.

Company: Zhejiang Smart Sealing Co., Ltd.

Address: Yanghu Industrial Zone, Xiaoshan, Hangzhou, 311201, Zhejiang, China

Phone: 0086-571-82769011

Mobile: 0086-13758127676 (Jessica Chen)

Email: sales@smartsealing.com

Alternate Email: jessica_chen25@163.com

Website: www.smartsealing.com

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