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ZMBQ Pneumatic Thin Film Cut off Valve
Instructions for Use The ZMBQ pneumatic diaphragm cut-off valve adopts a top guide structure and is equipped with a multi spring actuator. It has the advantages of compact structure, light weight, sensitive action, S-shaped fluid channel, low pressure drop loss, large valve capacity, and easy disassembly and assembly. The cut-off valve receives signals from the regulating instrument to cut off, open, or change the flow direction of the medium, achieving automatic control of process parameters such as pressure, flow rate, and liquid level. Widely used in production process automatic control and transportation control systems in various industrial sectors such as petroleum, chemical, metallurgical, power, light industry, textile, etc. This series of products comes in two types: film type and piston type. There are three types of valve body structures: single seat, sleeve, and double seat (two position three-way). The sealing forms include packing sealing and corrugated pipe sealing. The nominal pressure rating of the product is PN10, 16, 40, and 46, and the nominal diameter range is DN20-200mm. The applicable fluid temperature ranges from -60 to 450 ℃. The leakage level is IV or VI. The traffic characteristic is fast opening.
Product Features The shut-off valve adopts a multi spring actuator and a regulating mechanism connected by three vertical poles, which can reduce the overall height by about 30% and the weight by about 30%. The valve body is designed according to the principles of fluid mechanics as a low flow resistance channel with equal cross-section, increasing the number of rated flow systems by 30%. There are two types of sealing parts for valve internals: tight type and soft type. The tight type is made of hard alloy welding, while the soft type is made of high-quality materials, with excellent sealing performance when closing. The balanced valve internals increase the allowable pressure difference of the shut-off valve. The bellows sealing type forms a complete seal for the moving valve stem, blocking the possibility of medium leakage. Piston type actuator, with high operating force and large pressure difference. Part material Valve body and sealing sleeve: HT200, ZG230-450, ZG1Cr18Ni9Ti, ZG1Cr18Ni12MO2Ti Valve core and seat: 1Cr18Ni9T, OCr18Ni12MO2Ti, 1Cr18Ni9Ti welded with Stellite alloy Sleeve and valve plug: 1Cr18Ni9T, OCr18Ni12MO2Ti, 1Cr18Ni9Ti welded with Stellite alloy Packing: polytetrafluoroethylene, flexible graphite Corrugated film: Nitrile rubber clip reinforced polyester fabric Spring: 60Si2Mn Valve stem and push rod: 2Cr13, 1Cr18Ni9Ti Valve core and plug (soft parts): reinforced polytetrafluoroethylene Bellows: 1Cr18Ni9Ti Ordering Instructions Name and model of regulating valve Nominal pressure Mpa Nominal diameter (mm) Rated flow coefficient (Kv) Inherent flow characteristics medium name Working temperature and range Operation mode of the whole machine Pressure set point and adjustment range Valve body, valve internals, and packing materials Attached attachments Other special requirements |
