01 / 11
O-Ring
AS (US), JIS (Japan) and GB (China) standard sizes basically complete in stock, plus non-standard sizes and materials.
Ningbo Xutai Rubber · Since 2007
Precision rubber seals, 800 million a year.
O-rings, X-rings, flat washers, ED rings, rubber strips and custom moulded parts — made in Ningbo under an IATF 16949:2016 quality system.
2007Founded in Ningbo, Zhejiang
800MSeals produced per year
100+Vacuum flat curing machines
1000Rubber materials (approx.)
Products
Eleven seal families. Standard sizes in stock, custom on demand.
Sealing products for many fields, in rubber materials with different functions. Tens of thousands of specifications are kept in a finished-goods warehouse of several thousand square metres.
02 / 11
X-Ring
Star-section ring.
03 / 11
Flat Washer
Rubber flat washers.
04 / 11
Bevel Flat Washer (ED Ring)
Bevelled flat washer.
05 / 11
Y-Ring
Y-section ring.
06 / 11
V-Ring
V-section ring.
07 / 11
Triangular Ring
Triangular-section ring.
08 / 11
Rubber Retaining Ring
Rubber retaining rings.
09 / 11
Rubber Ball
Rubber balls.
10 / 11
Rubber Strip
Round, square, star or hollow sections, joined into rings of any inner diameter. Round NBR 70, silicone 70 and FKM 75 Shore strips in stock.
11 / 11
Customized Parts
Moulded rubber parts to your drawing, from our in-house mould workshop.
Standards in stock
AS, JIS and GB O-ring sizes basically complete.
Materials
Nearly 1,000 rubber materials; material formulas customised.
Strips in stock
NBR 70, silicone 70 and FKM 75 Shore round strips.
Drinking water
WRAS-approved EPDM compound EP0B7070C, Shore 70.
800Mseals a year from one plant in Ningbo
About Xutai
R&D, design, testing, production and sales under one roof.
Founded in March 2007 in Wuxiang Industrial Zone, Yinzhou, Ningbo, Ningbo Xutai Rubber Industry Co., Ltd. is a technology-driven manufacturer of rubber seals with an annual output of 800 million pieces.
An ERP system has run the business since day one — upgraded three times in ten years and maintained by in-house IT staff — covering sales, production, quality inspection, warehouse and customer complaints.
- FoundedMarch 2007
- LocationYinzhou, Ningbo, Zhejiang, China
- Output800 million seals per year
- Quality systemISO/TS 16949 since 2012 · IATF 16949:2016 since 2018
IntegrityPragmatismOpennessInnovation
Factory
From compound mixing to 100% inspection.
Mixing, moulding, cryogenic trimming, full inspection and a stocked warehouse — all in-house.
Mould workshop
Complete set of automatic equipment with in-house mould opening and programming. More than 50 sets of moulds per day.
Curing
More than 100 vacuum flat curing machines and 10 intelligent two-stage curing ovens.
Trimming & sorting
3 cryogenic trimming machines, automatic sorting and intelligent full-inspection machines.
Stock
Tens of thousands of seal specifications and moulds on hand for fast response.
In-house laboratory tests
- Elongation
- Tensile strength
- Compression set
- Density
- Shore hardness
- IRHD hardness
- Ageing
- Vulcanization (rheometer)
- Low-temperature brittleness
- TR10 low-temperature retraction
- Oil resistance
- Chemical resistance
- Conductivity
- Insulation
Certifications
Automotive-grade quality. Drinking-water approvals.
Certificates and test reports as published on the Xutai website.
IATF 16949:2016Quality management system, upgraded from ISO/TS 16949:2009 in 2018.
Please ask us for the current validity of each certificate.
FAQ
Questions buyers ask first.
Answers based on Xutai's published company information.
What rubber seals do you manufacture?
O-rings, X-rings (star rings), Y-rings, V-rings, triangular rings, flat washers, bevel flat washers (ED rings), C-rings, rubber strips, rubber balls, rubber retaining rings and other moulded rubber parts.
Do you keep standard O-ring sizes in stock?
Yes. Our finished-goods warehouse covers several thousand square metres with tens of thousands of specifications in stock. American (AS), Japanese (JIS) and Chinese national standard (GB) O-ring sizes are basically complete, and we also hold many non-standard sizes and materials.
Can you produce custom rubber parts to my drawing?
Yes. Our mould workshop has a complete set of automatic equipment with in-house mould opening and programming, so we can respond quickly to design changes and new product development.
Which quality certification do you hold?
Xutai passed ISO/TS 16949:2009 certification in 2012 and successfully transitioned to IATF 16949:2016 in 2018.
Are your materials approved for drinking water?
Our website publishes a WRAS material approval for EPDM compound EP0B7070C (Shore 70), a Hygiene-Institut des Ruhrgebiets test certificate to DVGW W 270, a DVGW EN 549 type examination certificate, an NSF International certificate and SGS test reports. Please ask us for the current validity of the certificate you need.
What does your laboratory test?
Elongation, tensile strength, compression set, density, Shore hardness, IRHD hardness, ageing, vulcanization, low-temperature brittleness, TR10 low-temperature retraction, oil resistance, chemical resistance, conductivity and insulation, plus automatic hardness and dimension inspection.
What is your production capacity?
Xutai produces 800 million seals per year, with more than 100 vacuum flat curing machines and more than 50 sets of moulds made per day.
Contact
Tell us the seal you need.
Send a drawing, size or sample description. Our sales team will reply by email.
- AddressNo. 22 Longxing Road, Wuxiang Industrial Zone, Yinzhou, Ningbo, Zhejiang, China
- Phone+86 574 8306 2211 · +86 574 8306 2218
- Fax+86 574 8306 2214
- Email9999@xutairubber.com