Daily Archives: May 3, 2017

Overview and Basic Design of Valve Stem Oil Seals

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Valve stem oil seals are small relative to other gaskets and seals in an engine, but play an important role in lubrication. What makes valve stem seals different than almost every other type of seal? The answer is simple – they are designed to leak. Seals designed to leak may sound counter-intuitive, but the amount and way in which they leak is precisely controlled to achieve a specific goal.

 

Valve stem seals provide a controlled leak of oil to allow the valve stem to be lubricated as it slides in the valve guide. The amount of oil that passes by the valve stem seal must be precisely controlled, as too little oil causes stem and guide wears. Too much oil causes carbon buildup leading to valve seat damage, decrease in volumetric efficiency, increased emissions and excessive oil consumption.

 

There are two basic valve stem oil seal designs:

 

  1. Deflector seals – also called umbrella seals, deflect oil away from the valve stem. They are secured to the valve stem and move with the valve to shield the valve guide from excess oil. Umbrella type seals were commonly used prior to the development of positive type seals.

 

  1. Positive seals – attach to the valve guide boss and function as squeegees, wiping and metering oil on the stem as they pass through the seals.

 

AOK supplies high quality Valve Seals for cars such as Alfa Romeo valve seals, BMW vehicle valve seal and motorcycle’s, etc… In order to maintain high quality, the valve stem oil seals from AOK are all inspected thoroughly, therefore, AOK has won worldwide recognition.

 

If you are looking for various rubber parts, oil seal, or others, please don’t hesitate to contact with AOK via phone call or email. Let us know your requirements to find what you need.

 

 

Article Source: http://www.felpro-only.com/blog/valve-stem-seals_/

Fishing Waders Help Keep You Dry

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Getting a good start in fly fishing as a new hobby can be as easy as making a list of all the equipment you will need. Keeping dry while wading is very important so a good place to start would be with fly fishing waders.

 

This all important piece of equipment is a pair of overalls with straps that go over your shoulders and cover your chest with a pair of rubber boots that fit over your feet keeping them dry. Hip waders are also available with rubber boots.

 

When looking at hip waders keeps in mind they look like two large rubber boots that fit up to the hip. These waders will help keep the fisherman dry while offering support from the padded reinforced knees. This feature comes in handy if the fisherman takes a fall or needs to kneel down. Discount fishing waders can be found in both chest and hip fishing waders.

 

Hodgman pants are one of the popular brands chosen by fly fishermen. When shopping for waders, hip or chest online it is important to have measurements for chest, outseam, inseam and shoe size. If shopping at the local sporting goods store the salesman will be able to help with measurements or the waders can be tried on before buying.

 

When shopping for waders check out simms fishing boots. The simms fishing waders are made with five layers of material that prevents tears around the chest area, is waterproof, and comes with hand warmers and a zippered chest pocket.

 

PACIFIC EAGLE Enterprise Co., Ltd. is a specialized OEM company. We have engaged in manufacturing of neoprene, hunting and fishing field products for over 25 years. If you are interested in learning more information about simms fishing waders or other waders, welcome to visit our website or fill out the form at Pacific Eagle for any technical support or requests for quotations.

 

 

Article Source: http://EzineArticles.com/3591673