Plug valve: A valve with a through hole as a valve for the opening and closing member. The plug body rotates with the valve stem to achieve the opening and closing action. Small, non-filled plug valves are also known as "Cock". The plug body of the plug valve is mostly a cone (also has a cylinder), and cooperates with the conical hole surface of the valve body to form a seal pair. The plug valve is a valve that uses zui early, and has a simple structure, a quick switch, and a small fluid resistance. The ordinary plug valve is sealed by the direct contact between the finished metal plug body and the valve body, so the sealing performance is poor, the opening and closing force is large, and it is easy to wear, and can usually only be used for low (not higher than 1 MPa) and small. Caliber (less than 100 mm). In order to expand the range of application of the plug valve, many new structures have been developed. Oil lubricated plug valves are an important type of Zui (see [Oil Lubricated Plug Valves]). Special grease is injected from the top of the plug body between the cone hole of the valve body and the plug body to form an oil film to reduce the opening and closing torque and improve the sealing performance and service life. It has a working pressure of up to 64 MPa, a high operating temperature of 325 ° C, and a large diameter of 600 mm.
The passage of the plug valve can take many forms. A common straight-through type is primarily used to shut off fluids. Three-way and four-way plug valves Suitable for the fluid-reversing plug valve, the opening and closing member is a perforated cylinder that rotates about an axis perpendicular to the passage to achieve the purpose of opening and closing the passage. Plug valves are primarily used to open and close pipes and equipment media.
The main advantages of the plug valve are as follows:
1. It is suitable for frequent operation, opening and closing quickly and lightly.
2. The fluid resistance is small.
3, the structure is simple, relatively small volume, light weight, easy to repair.
4, good sealing performance
5. It is not restricted by the installation direction, and the flow direction of the medium can be arbitrary.
6, no vibration, low noise. The plug valve can be divided into four types according to the structure: a compact plug valve, a self-sealing plug valve, a stuffing plug valve and a oil-filled plug valve. According to the channel form, it can be divided into three types: straight-through, three-way and four-way.
Injection Grade Hyaluronic Acid Powder From China Manufacturer is mainly used for intra-articular and intra-ocular preparations. Medical Grade Hyaluronic Acid is widely used in plastic surgery, joint dysfunctions of human or animals (horse, dogs etc.), preventing postsurgical tissue adhesion and drug carrier.
Feature
1. Reliable and safty: Our Injection Grade Hyaluronic Acid is GMP, CEP, DMF certificated and the
factory passed an on-site inspection by the US FDA. Our Injection Grade Sodium hyaluronate is all fermented products,
non-animal sources, non-GMO and non-BSE/TSE risk.
2. High-purity and lower impurities:
higher glucuronic acid content, lower protein, heavy metals and nucleic acid
content, extremely low endotoxin content, compared with other injection grade
hyaluronic acid in the market.
3. High stability: stability test
shows our injection grade hyaluronic acid is stable during the
transportation and storage.
Function
Healthy Skin:
Hyaluronan is also a component of skin tissues, and helps in the repair of skin cell. It helps in tissue lubrication and faster healing of wounds. Another major benefit of this acid is its anti-wrinkle effects, as it helps the skin build up levels of collagen, increasing suppleness and moisture.
Treating Osteoarthritis:
Hyaluronic acid covers the spaces between the joints of the knees and protect the bones from damage due to friction. Injections of hyaluronic acid are prescribed to increase the level of this acid in the joints, and relieve pain. Even the oral intake of this acid through foods or supplements is helpful.
Healthy Eyes:
Hyaluronic acid is also beneficial to the eyes, as it can be used as artificial tears for dry eyes. The acid is used in many anti-aging creams for the face, and can also be injected into the wrinkles near the eyes, commonly known as 'crow's feet'.
Aesthetic Injections (Facial & Body)
Hyaluronic acid based gel injections(HA Dermal Filler) are a new option for the on-spot treatment of facial wrinkles. These shots must be administered by a dermatologist and last up to 4 to 6 weeks.
Specification
|
Test Items |
Standard |
|
Appearance |
White powder |
|
Hyaluronic acid |
≥98% |
|
Molecular weight |
≥2.0X 106 Da |
|
PH |
6.0-7.5 |
|
Loss on drying |
≤8% |
|
Protein |
≤0.05% |
|
Nitrogen |
2.0-3.0% |
|
Heavy metal |
≤10ppm |
|
Bacterial counts |
≤10cfu/g |
|
Mold and Yeast |
≤10cfu/g |
|
Endotoxin |
≤0.5eu/mg |
|
Sterile Test |
Complies |
|
Shelf Life |
Two Years |
|
Conclusion |
The results meet the standard |
Injection Grade Hyaluronic Acid Powder
Medical Grade Hyaluronic Acid,Hyaluronic Acid Injection,Injection Grade Hyaluronic Acid Powder,Hyaluronic Acid Liquid
Qufu Hi-Tech Trading Co., Ltd. , https://www.chinahyaluronic-acid.com