Pneumatic dark stem gate valve
I. Introduction:
The DMZ673H pneumatic dark stem gate valve has the advantages of short valve body structure length, light weight, the valve seat sealing surface can be protected from medium erosion, uniform pressure on the sealing surface, tight fit, can scrape off dust particles, tar, etc. on the valve seat sealing surface during the closing process, convenient sewage discharge, and prevention of medium leakage. It is suitable for use in gas pipelines containing dust or tar. The DMZ673H pneumatic dark stem knife gate valve is a relatively complex automatic control instrument, composed of multiple pneumatic components and a valve body. It is mostly used in occasions requiring rapid opening or closing. Double-acting: two-position control for valve opening and closing; Single-acting (spring return): the valve automatically opens or closes when the electrical or pneumatic circuit is cut off or malfunctions.
II. Features:
1. The knife gate valve is a new type of gate valve, with small volume, light weight, light and material-saving, and is an ideal product in industries such as sewage, coal slurry, mud, air, slag-water mixture, water supply, papermaking, and mining.
2. The knife gate valve adopts metal-to-metal hard sealing or metal-to-rubber soft sealing. During the opening and closing process, the gate and sealing surface adopt a special design, with less friction and long service life.
3. The upper seal of the knife gate valve breaks through the conventional sealing form, adopting a cover structure, which changes the upper seal from a large-area rectangular seal to a small-area circular seal, greatly improving the sealing performance. On the basis of the circular seal, the internationally advanced floating seal structure is also adopted, making the upper seal reach the same service life as the pipeline, thereby improving the overall service life of the valve.
4. After adding a sleeve device on the top of the handwheel of the knife gate valve, all moving parts of the valve can be in a closed state, and the screw transmission between the gate and the valve stem will not jam due to dry lubricating oil. It is especially suitable for long-term normal work in harsh environments with dust and dryness.
III. Application Scope:
Mining and iron and steel industry - used for coal slurry, filter residue slurry, etc.
Purification equipment - used for wastewater, mud, dirt, and clarified water with suspended matter.
Papermaking industry - used for pulp and water mixture of any concentration.
Sugar industry - used for beet washing, syrup, juice extraction, fruit juice, etc.
Food industry - used for washing and flushing equipment, grain conveying equipment, malt slurry, etc.
Power station ash removal - used for ash slurry.
IV. Technical Parameters:
Nominal Pressure | PN |
Shell Test | 1.5 Mpa |
Seal Test | 1.1 Mpa |
Working Temperature | Rubber ≤80℃; PTFE seal ≤180℃; Hard seal ≤425℃ |
Applicable Medium | Syrup, pulp, sewage, coal slurry, ash, slag-water mixture |
| Machinery & Equipment/Valves/Gate Valves | |
