Z41H cast iron gate valve

Z41H cast iron gate valveIntroduction:

Most gate valves use forced sealing for liquid penetrant testing, which means that when the valve is closed, external force must be used to forcefully press the gate plate against the valve seat to ensure the sealing surface is sealed. When the valve is opened, when the lifting height of the gate is equal to 1:1 times the valve diameter, the fluid channel * is unobstructed, but this position cannot be monitored during operation. In actual use, the vertex of the valve stem is used as a marker, that is, the position where it cannot be opened, as its fully open position. A gate valve is an opening and closing component that moves perpendicular to the direction of the fluid flow. It can only be fully opened or fully closed, and its parameters vary depending on the valve. Typically, it is 5 ° C, and when the medium temperature is not high, it is 2 ° 52 '. JB/T5300-2010 Guidelines for Material Selection of Industrial Gate Valves Gate valves are only used for fully open and fully closed medium operation on various pipelines or equipment, and are not allowed to be used for throttling. (4) GB8465.1-87 "Basic Dimensions of Internal Threaded Gate Valves, Globe Valves, Ball Valves, and Check Valves - Iron Gate Valves" 3. The sealing pairs are matched reasonably, and the sealing surfaces of the gate and seat are made of Stellite cobalt based hard alloy with different hardness, which is reliable in sealing, high in hardness, wear-resistant, high-temperature resistant, corrosion-resistant, and has good abrasion resistance and long service life.

execution standard
Design and Manufacturing: According to the provisions of GB/T12234-89
Structural length: According to the provisions of GB/T12221-89
Flange size: According to the provisions of JB79 GB/T9112-9311
Inspection and Testing: According to the provisions of JB/T9092-99 GB/T13927-92
Transmission mode: manual, electric, gear transmission
Technical parameters of cast iron gate valve
Technical parameters of cast iron gate valve

Z41H cast iron gate valvecharacteristic;

1. Compact structure, reasonable design, good valve rigidity, smooth channel, and low flow resistance coefficient.
2. The sealing surface is made of stainless steel and hard alloy, with a long service life.
3. Using flexible graphite packing, reliable sealing, and easy and flexible operation.
4. Drive modes include manual, electric, pneumatic, and gear transmission. Structural types include elastic wedge single gate, rigid wedge single gate, and double gate models.
5. Widely applicable as an opening and closing device for connecting or cutting off the medium in oil and steam pipelines such as petrochemicals and thermal power plants