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Ningbo Yinzhou Deyu Autopart Co., Ltd.
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Product (217)
- BRAKE PAD (5)
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TIRE VALVES
(41)
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DIY REPAIRING TOOLS
(108)
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TIRE SEALING AND PATCHES
(8)
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WHEEL BALANCE WEIGHT
(26)
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WHEEL NUTS & BOLTS
(18)
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WIPER BLADES
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- Others (2)
Tire Valve News (2)
Equipment (3)
Certificates (1)
Credit Report
Products Index
Company Info
Ningbo Yinzhou Deyu Autopart Co., Ltd. [China (Mainland)]
Business Type:Manufacturer, Trading Company
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)
Tire Valve News
The consumer media has given a great deal of ink and air-time recently to the issue of tire safetty and the various factories that can cause a tire to fail. But one item most of these reports have not touched upon is the valve stem.
Think about it. The valve stem is what keeps the air in the tire. If the valve stem donesn't seal properly and leaks air at the base or thorought the valve core, the loss of air pressure can cause the tire tor run hot or go flat. A low tire is a dangerous tire, especially when driving at high speed during hot weather or when a vehicle is heavily loaded.
Though the valve stem is the least expensive component is a tire/ wheel assembly, it's also the most important," says Steve Zimmerman of Tuffy Manufacturing in Akron, Ohio, a supplier of tire repair products and equipment.
To most people, av valve stem is a valve stem-they all look the same so the only difference they see is the price. But one of the most serious safety issues facing our industry todaym, he says, is cheap, low quality valve stems that are coming in from offshore manufacturers.
Zimmerman says many of these products are made of inferior materials that don't stand up well to ozone, heat and cold over time. Yet many people don't realize there is a difference- a hugh differn ce – in the long-stem reliability of some of these valve stems.
Bigger Differene Than Price
Good quality or name-brand snap-in valve stems from reputable suppliers for passenger car/light truck applications typically sot rom 16 to 25 cents per piece in baulk quantity vs. maybe 11 to 12 cents each for "no-name" imported stem s in bulk(Note: these are wholesale price). For gromment-style truck valve stems, a quality brand may sell for $ 1 each com pared to 60 cents or less for a no-name brand.
A few cents difference in price may not seem lik much, especially when most parts stores and tire dealers charge $2.50 or more to their customers for an installed valve stem. But he price does reflect the underlying quality.
Frank Banzanhof of Schrader Bridgeport International Inc., Muskegee, Okla, a manufacturer of OE valve stem, says many import stems are made of natural rubber thean EPDM, a tougher synthetic rubber used in most quality valve stems. EPDM has a much broader temperature range than natural rubger, and remain flexible in the coldest weather. It also resists ozone and chemical attack the deteriorates natural rubber.
"The materials they are using will not pass the SAE 1205-1206 ozone requirements, which is a standard created by the Society of Automotive Engineers. No vehicle manufacturer will accept a valve stem that doesn’t meet this standard."
Banzanhof cautions that using valve stems made from low quality materials is asking for trouble. After only two years of service, natural rubber valve stems dry out, he says, becoming hard and brittle, allowing for cracks and leaks.
