Marine flange cast iron gate valve CB/T465-95

Marine flange cast iron gate valve CB/T465-95 introduction

When the gate valve is closed, the sealing surface can be sealed only by relying on the medium pressure, that is, only relying on the medium pressure to press the sealing surface of the gate plate to the seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most gate valves are forced to seal, that is, when the valve is closed, it is necessary to rely on external forces to force the gate to the seat to ensure the tightness of the sealing surface. The gate valve's gate plate moves in a straight line with the valve stem, which is called (also called the gate valve). Usually there is a trapezoidal thread on the lifting rod, and through the nut at the top of the valve and the guide groove on the valve body, the rotating motion is changed into a straight motion, that is, the operating torque is changed into the operating thrust. When the valve is opened, when the lift height of the gate is equal to 1:1 times the diameter of the valve, the channel of the fluid is completely unblocked, but this position can not be monitored during operation. In actual use, it is the vertex of the valve stem as a sign, that is, the position of the opening cannot be moved, as its full open position. In order to consider the temperature change, the locking phenomenon is usually opened to the apex position, and then reversed 1/2-1 turns, as the position of the fully opened valve. Some gate valves, the valve stem nut is located on the gate plate, the hand wheel rotation drives the valve stem to rotate, and the gate plate is lifted, this valve is called the rotating rod gate valve or the dark rod gate valve.

Cast iron gate valve is a kind of valve, with small flow resistance, high height, long opening and closing time, etc., the disadvantage is inconvenient maintenance. There are two types of cast iron gate valves: wedge gate valve and parallel gate valve.

Packing of Standard Packing:

 Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2022 gallon liquid totes Special package is available on request. E FORUs’  is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.