Gate valve opening and closing pieces is the gate, the direction of movement of the gate and fluid perpendicular to the gate valve can only be fully open and closed, not suitable for regulation and throttling. The gate has two sealing surfaces. The two most commonly used wedge gate valves form a wedge on the two sealing faces. The wedge angle varies with the valve parameters, typically 5 °. Wedge gate valve gate can be made as a whole, called the rigid gate; can also be made to produce a small amount of deformation of the gate, to improve its technology to make up for sealing surface angle in the process of deviation, this gate The board is called a flexible gate. Gate valve type, according to the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve can be divided into: single gate type, double gate and flexible gate type; gate valve can be parallel Divided into single-gate and double gate type. According to the thread position of the stem division, can be divided into Ming rod valve and dark rod gate valve two. Gate valve is closed, the sealing surface can only rely on medium pressure to seal, that is, rely on media pressure to the sealing surface of the gate pressure to the other side of the valve seat to ensure that the sealing surface of the seal, which is self-sealing. Most of the gate valve is forced seal, that is, when the valve is closed, it must rely on external force to force the gate to the valve seat to ensure the sealing surface of the seal. The utility model relates to a distraction type spherical gate valve, which comprises a valve body, a valve cover, a bracket, a valve stem and a gate which are connected with the gate in the valve body. The gate comprises a wedge cone and a wedge cone Body on both sides of the dovetail groove connected spherical valve composition, the upper and lower spherical valve flap are provided with a limit ring and the limit plate, the valve stem and the tapered cone connected to the valve stem horizontal assembly cross-pin, horizontal Both ends of the pin are provided with a roller, which is matched with a continuous chute and a spiral guide groove on the two side walls of the roller and the bracket. Hongfeng that the utility model overcomes the gate valve opening and closing of the gate when the moving distance, opening and closing a long time, sealing surface wear fast defects, with the opening and closing speed, no relative friction between the sealing pair, the operation Labor-saving, long service life, according to the determination of its opening and closing time with only one-fifth to one-tenth of the same size ordinary gate. î— gate valve has the following advantages; Fluid resistance is small, the sealing surface by erosion and erosion of small media. 2. Open and close more effort. 3. The medium flow is unrestricted, does not disturb the flow, does not reduce the pressure. 4. Simple body, short structure length, good manufacturability and wide range of application. Nominal pressure or pressure level: PN1.0-16.0MPa, ANSI CLASS 150-300LB, JIS10-20K Nominal diameter or diameter: DN10 ~ 1000, NPS 1/2 ~ 36 "Connection: flange, butt welding, thread, etc. Suitable temperature: -196 ℃ ~ 700 ℃ Drive mode: manual, bevel gear, pneumatic, electric, hydraulic, gas-liquid linkage, electro-hydraulic linkage
Galvanized/
Galvalume Steel Coil as Building Material
The Galvanized Steel Coil is made by cold
rolled steel sheet, and then through chromate, unoiled, various spangles, hot
dipped. The surface is coated by zinc or Aluzinc. It is widely used as the raw
material of building. We have exported our product to Middle east, Africa,
South America, Ukraine for the good quality and best credit.
Pre-painted
PPGI/PPGL Steel Coil
The PPGI/PPGL coil is made by hot dipped
galvanized/galvalume steel coil. The coated with organic fluorine resin which
has good appearance of anticorrosion. The steel grade is ASTM A653 and type of
coating is epoxy and polyester. Its coating has good adhesion, high tenacity.
We have exported our product to Africa, South America, India, Dubai, Algeria,
Iran, Ukraine, Turkmenistan, and Malaysia for its advantage of durable,
antirust and fireproof.
Steel
sheets
The GI/GL/PPGI/PPGL Steel Coils can be cut
or corrugated into steel sheets, according to the width and thickness.
The shape can be plain, waved, trapezoid,
glazed tile and profiling sheets.
Usually the steel sheets are used for wall
and roof for prefabricated buildings.
Steel Coil & Steel Sheets
Galvalume Steel Coil,Galvalume Steel Sheet,Prepainted Steel Sheet,Galvanized Steel Coil
HEBEI WEIZHENGHENG MODULAR HOUSE TECH CO., LTD , http://www.sinowzh.com