Instructions for use:
ZMQ type pneumatic membrane shut-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-streamlined fluid channel, small pressure drop loss, large valve capacity, and easy disassembly and assembly.
The shut-off valve accepts signals from the regulating instrument to cut off, open, or change the flow direction of the medium to achieve automatic control of process parameters such as pressure, flow, temperature, or liquid level. It is widely used in the automatic control and remote control system of production processes in various industrial sectors such as petroleum, chemical, metallurgy, electric power, light industry, and textile.
This series of products is available in film type and piston type. The valve body structure has three types: single seat, sleeve and double seat (two-position tee), the sealing form is packing seal and bellows seal, the nominal pressure level of the product is PN10, 16, 40, 64 four kinds, and the nominal diameter range is DN20~200mm. The applicable fluid temperature is -60~450°C. The leakage level is level IV or VI. The flow rate is fast opening.
Product features:
The shut-off valve adopts a multi-spring actuator and is connected to the adjustment mechanism with three columns, which can reduce the overall height by about 30% and the weight by about 30%.
• The valve body is designed with an equal-section low-flow resistance channel according to the principle of fluid mechanics, and the rated flow coefficient is increased by 30%.
•There are two types of sealing parts of the valve trim, the tight type is hardfacing cemented carbide, and the soft sealing type is made of soft material, and the sealing performance is excellent when closed.
• Balanced valve trim to improve the allowable pressure difference of the shut-off valve.
• Bellows seal type forms a complete seal on the moving valve stem, blocking the possibility of media leakage.
• Piston actuator, large operating force, large pressure difference.
Part material
Valve body, seal sleeve: HT200, ZG230-450 ZG1Cr18Ni9Ti ZGOCr18Ni12M02Ti
Valve core, seat: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti overlay Stella alloy
Sleeve and valve plug: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti overlay stencai alloy
Packing: Teflon, flexible graphite
Corrugated diaphragm: Nitrile rubber clip reinforced polyester fabric
Spring: 60Si2Mn
Stem, actuator: 2Cr13, 1Cr18Ni9Ti
Valve spool, valve plug (soft parts): reinforced PTFE
Bellows: 1Cr18Ni9Ti
Technical parameters
1) The performance indicators of this product implement GB/T4213-92;
2) If the allowable pressure difference value in the table is greater than the nominal pressure, the nominal pressure value is taken, and if it is less than or equal to the nominal pressure value, it remains unchanged;
3) The allowable value in the table is the standard cylinder value, and different cylinders can be used to increase the allowable pressure difference.
Specification weight
Connection standard
Connection dimensions and standards
• Flange standard: cast iron flange according to GB4216-84 cast steel flange according to GB9113-88, JB/T79-94
• Flange sealing surface type: PN10, PN16 are convex surfaces; PN40 and PN64 are concave and convex surfaces, and the valve body is concave.
• Structure length: GB12221-89.
• Actuator gas signal interface: female thread M10X1
• The body flange and flange end face distance can be manufactured according to the standard specified by the user. Such as: ANSI, JIS, DIN and other standards.
Ordering instructions
When ordering, please provide the following information:
• The name and model of the regulating valve
• Nominal diameter (mm)
• Nominal pressure (MPa)
• Rated flow factor (Kv)
• Media name
• Operating temperature and range
• The mode of action of the whole machine
• Valve body, valve trim and packing material
• Accessories included