4 Advice to Choose a China Seals Material

Top 3 Tips for Selecting the Proper Rotary Seals for Your Business

Rising industrial activities across the globe have skyrocketed the need for different types of seals to prevent industrial leakages. One of the most important seals in any industry is the rotary seal, which plays a critical role in the working of pumps and other industrial equipment. Rotary seals are widely used in various industries, including aviation, construction machinery, agricultural equipment, wind turbines, medical, automation, fertilizers, and, for that matter, every industry where pumps and fluid transfer equipment are used. 

This means that compromising on the quality of seal rings is just a disastrous approach since a low-quality seal ring will not only contribute to industrial losses but also contaminate your expensive equipment, which will increase your maintenance cost. But whenever you have to get your hands on any rotary seal, you need to keep a few things in mind. For instance, what is the material of that seal, and what are its recommended working conditions? Is the seal perfect for your specific need? Only when you get the answer to these questions will you be able to get the perfect mechanical seals.

Bad Impacts of Improper Sealing

You are prone to two losses if you fail to use proper rotary sealing rings. 

Firstly, the inefficient sealing rings trigger the fluid leakage, which were supposed to closed between the shaft and stationary parts. This leakage means that the fluid can contaminate your final products, thus reducing their quality. Therefore, your customers will start questioning your products, which is never a good sign for any industrialist. 

Secondly, poor sealing rings mean that you will take more time on the after-market, which is detrimental to your equipment and the quality of your products.

Common Signs of Damaged Sealing Rings

But the good news is that the damaged seal rings are always detectable, so you can change them before it’s too late. Some of the common signs of poor rotary sealing rings are:

• • Leakage

First of all, if you can see the fluid leaked from the hole mechanical seal, that means the seal rings were worn or abnormal broken.

• • Stopped Running

Secondly, some abnormal broken maybe is the seal rings cracked，this could take the shaft stopped running.

• • Abnormal vibration

If the abnormal vibration exist persistently，you should check the whole mechanical seal and adjust the seal rings to right area.

Selection Tips

Whenever you have to select the rotary shaft seals, you need to take the following factors into account:

• • Choose Material Based on Applications Domain

One of the most important things while purchasing rotary seals is the speed of the shaft or the motor. For high-speed shafts, Silicon Carbide is the recommended material for rotary seals. These seals allow you the minimum friction and wear and tear. On the other hand, ceramic seals are also used for low-speed applications.

• • Buy from manufacture channels

While buying rotary seals, another important point to consider is to get them from an experienced vendor who has proven experience in providing such seals to different industries.

• • Checking and verification

Whichever model of rotary seal you are about to buy, you can always check it on your specific equipment. Many vendors will provide you with a sample of the actual product or the design specifications, which will allow you to verify whether the product will suit your needs or not.

Wrapping-up

Founded in Chicago, Illinois, Junty has managed to impress industrialists worldwide. Today, Junty enjoys the overwhelming support of global industries in various domains, as our seals and wear-resistant equipment continue to help them in making their operations smooth. As we are a professional mechanical seal manufacturer, complying with the individualized needs of the customers is our specialty since we understand that almost all industries need custom seal rings.

So, for more information about rotary seals, please visit our website. 

And for more inforamtion related to the basic information about pump seals, you can read: https://sealchina.com/blog/the-top-3-major-reasons-to-the-failure-of-pump-seals/

Reference

https://www.flexaseal.com/how-to-store-a-mechanical-seal/

Origin and Development
述印

The practice of seal carving has a long history in China. The earliest known records were found as inscriptions on animal bones and tortoise shells which were often used for divination. These oracle bone inscriptions {甲骨文} were made in the Shang dynasty {商朝} (1766-1122 B.C.) Very soon, engravings on bronze vessels such as tripods, bells and ancient weighing scales appeared. The first known example of engraving on stone was the Ten Stone Drums {石鼓文} in which Seal Script {篆書} Chinese characters were engraved. The Ten Stone Drums are believed to date back to the Chou dynasty {周朝} (1122-770 B.C.) In the Tang dynasty {唐朝} (618-907 A.D.), seal carving was so popular that it achieved the same level of excellence as the other three traditional arts (painting, calligraphy and poetry). This quadruplet was collectively known as the Four Extremes {四絕}.

In the Yuen dynasty {元朝} (1280-1368 A.D.) scholar Wang Mien {王冕} was the first to use soft stones for seal carving. Since then, seal carving has become the art of the scholars and played a very important place in the art of calligraphy and painting down to the present time.

Kinds of Chinese Seal Carving

In China, the engraving on stones may be pictures or Chinese characters; in other words, there are picture seals {肖形印} and character seals {姓名印、閒印}. The earliest known records of pictorial carving date back to the Warring States {戰國} (476-221 B.C.). The pictures were mainly animals and human figures. While the practice of engraving pictures has continued since then, it is the carving of characters, and more specifically seal script characters, that dominate the art of seal carving.

Scripts used for Seal Carving: the Seal Script
篆書

Although many people both in the past and in the present show different kinds of calligraphy in seal carving, such as Regular, Running, Cursive, Clerical and Seal (Great and small), the Small Seal Script {小篆} is generally regarded as the most suitable one for the purpose. Great Seal Script {大篆}, a form of characters older than the Small Seal Script is not that suitable because of its unwieldy form and its limited vocabulary. Running and Cursive Script have not been very successfully applied to carving while Regular and Clerical Scripts, for various reasons, are not as popular as the Small Seal Script which is elegant in appearance, symmetrical in composition and has an archaic simplicity.

Learning Seal Carving

A seal (or stamp) is well carved for the well designed characters / compostion

• it appears natural and elegant;
• it can arouses the spirit and the imagination;
• it has archaic simplicity and a balanced distrigution of white and red spaces;
• it shows harmony and evenness in the distribution of various strokes.

The seal is not considered good if it lacks these qualities, even though it may look neat and delicate, or if craftsmanship predominates over artistry.

To successfully learn seal carving, one should first acquire a basic knowledge of Chinese calligraphy, especially Seal Script. This is necessary because seal carving and calligraphy are sisters to each other. Also, one should study examples of good seals, such as the collections of seals from famous artists and albums of rubbings from ancient imprints, thus learning to recognize surface designs and carving skills.

Finally one can then start carving on soft stones choosing at first characters with very few strokes and keeping on until the proper skills are acquired.

Before turning to the more practical discussion of the technical skills related to seal carving, some preliminary remarks are necessary.

• The carving of a seal may have a practical aim such as to record a name{姓名印}, a place of birth, an artist’s studio {齋館印} and so on; it can also be done in a more poetic mood to engraved sentiments such as desires and hopes, or a short poem, proverb or maxim.
• In all cases, the aesthetic value of the carving is the predominant factor to be considered.

Two forms of engraving: relief (yang) and intaglio (yin)

The carving in relief is known as carving in Yang Wen {陽文}, that is having the strokes in Red {朱文}; carving in intaglio is known as carving in Yin Wen {陰文}, or carving in blank {白文} (void). In the past, Imperial Seals were usually carved in relief; nowadays, artists may choose either form to suit their own taste and liking.

Shape of Seals

The seals may adopt any form, regular or irregular: the surface for carving may be circular, square, rectangular, oval, triangular, rhombic or polyhedral while the engraving of the characters can be done on many of the stone surfaces.

Stones for Seal Carving

Many kinds of materials could be used for carving: animal bone, tortoise shell, bronze, gold, silver, animal horn, ivory, clay, tile and of course, precious stones such as jade. However many of these materials are no longer used because they entail too many technical problems or do not embed easily the spirit of the carver: hardness or other material characteristics make it impossible for the artist to reveal the taste of bronze and stone {金石味}. Materials such as wood, clay, tile, animal horns etc. are now used occasionally by craftsman and but not much by artists in seal carving.

The most suitable material is the rather softer stones such as Ching-tin {青田} and Shou-shan {壽山} from the Chek-kiang {浙江} and Fukien {福建} provinces (South Eastern coast of China) which yield readily to the carving knife. As mentioned before, different shapes of seal surfaces can be used for the purpose of carving and there is no size limitation. Some stones are plain while others may be decorated with animal or human figures. A very interesting type of seal carving stone is known as the mother and child {子母印} set with detachable smaller stones encased in the larger stones.

• stone 印石
  The softer ones such as those mentioned before (Ching-tin & Shou-shan) should be used; the surface for engraving should be about 1 square inch (2,5 cm).
• carving knife 刻刀
  Many sizes and degrees of sharpness are available; however it is better to use the one that the carver feels the most comfortable with.
• sandpaper
  Both the fine and the coarse grades are required; and these are used for polishing the stone surfaces.
• red ink pad 印泥
  Used for inking the seal. The best ones are made from a pad of dried moxa plant fibers soaked with powdered cinnabar dissolved in seed oil; it is colorfast.

Preparing the Stone

• surface polishing 整理印面
  The surface to be carved is fist sandpapered and polished until it is smooth enough. Then all traces of powder are brushed off from the surface of the stone.
• surface designing 經營位置
  • The surface of the stone to be carved is pressed against a piece of soft and absorbent paper so that the boundaries of the surface are visible. The boundary line on the paper should now be traced out.
  • As the surface of the stone to be carved is very limited, planning and designing beforehand are very important. The composition should reveal a proper distribution of strokes in each character. The relative positions of the characters should be carefully adjusted. The distribution of red and blank spaces should be carefully taken into account.
  • Select the characters required. As Chinese characters may be composed of any number of strokes which are dots, lines, curves, hooks and so on, those characters with fewer strokes should be written in bolder and heavier than those with a greater number of strokes.
• transferring characters on the seal surface 落墨
  • Having written the desired characters, place the paper onto the surface of the stone so that the inked outline matches the boundaries of the seal surface holding the virgin portions of the paper firmly on the sides of the stone with one hand.
  • Then moisten that portion of the paper which is in contact with the seal surface. Next apply another piece of soft and absorbent paper on the wetted surface rubbing it slightly and evenly with the fingernail for a minute or two.
  • Then lift the two pieces of paper vertically upwards. The seal characters are now imprinted on the stone surface.

Carving the Stone
奏刀

• knife-work
  Throughout the long history of the art of seal carving, artists have realized that proficiency in calligraphy is transferable to seal carving. Hence the time honored advice to seal carvers is to treat the stone as paper and the knife as a brush. {視石如紙，視刀如筆，刀法盡之矣}
  • To be skillful in the art of carving, one should know the two important ways of holding the knife:
    • double hook method 雙鉤法
      The knife is held firmly by the thumb and the two first fingers; the ring finger is held behind the knife and is used as anchoring point. This method is suitable for carving seals of ordinary sizes.
    • gripping method 握刀法
      In this method, the knife is held firmly in the palm of the hand while all the five fingers are tightly closed. This grip can be used for carving seals of comparatively large sizes.
  • In writing characters, there is almost always a fixed order in doing the strokes. Thus the Chinese character ‘one’ ( 一 ) consists of only one horizontal stroke which is a straight line written from left to right. However, in carving, the order of the strokes is determined by the fact that, since every movement of the knife should be in the direction of the carver’s body, the stone has to be turned and rotated frequently.
• cutting style
  There are two main cutting styles: the single cut and the double cut.
  • single cut style 單刀法
    Here the knife cuts inside the ink line defining the stroke; it is used for carving seals in intaglio (Yin Wen)
  • double cut style 雙刀法
    Here the knife cuts at both edges of the ink line defining the stroke; it is used for carving both in the intaglio and relief manners.

Side incisions and side colophons
邊款又稱款識

When the artist wants to inscribe his name, a date or something more than the text of the seal surface, he can do so on one or more of the remaining surfaces of the stone. This kind of inscription is less formal than the one done on the seal surface. The characters in the side colophons are usually incised in Running Script. There are certain general rules for inscribing side colophons. Given that:

• the seal stone in being held in a vertical position with the seal surface beneath (as it would be positioned to stamp the paper)
• that the carver looking at the top of the stone

• One colophon
• face to carve — left

• Two colophons
• face to carve first — left
• face upon which to finish — outward
• direction of movement — clockwise

• Three colophons
• face to carve first — left
• face upon which to finish — right
• direction of movement — clockwise

• Four colophons
• face to carve first — left
• face upon which to finish — inward
• direction of movement — clockwise

• Five colophons
• face to carve first — left
• face upon which to finish — top
• direction of movement — clockwise and upwards

Side knocking and chipping
擊邊

Sometimes, in order to give the appearance of archaic simplicity and naturalness, the carver carefully knocks and chips the edges of the seal surface. However this should not be overdone. If after chipping and chiseling, the corners and edges appear too rugged, they should be smoothed slightly.

Seal's Imprints
鈐印

Seals should be imprinted only on silk or soft absorbent paper. In order to imprint a Chinese seal properly, one should begin by repeatedly pressing the seal surface against the ink pad. Then the seal surface should be carefully and firmly applied to the desired position. For better results, some pieces of soft paper should be placed underneath the paper to be imprinted. One has to apply vertical pressure evenly on all sides of the seal using a very slight rocking movement while being carefully not to make a smudge on the paper or silk surface. After use, the seal must be wiped clean with a soft absorbent material before storing it in the padded container designed for its protection.