DESCRIPTION

The ZMQ/ZSQ series pneumatic cut-off valve is an execution unit in the pneumatic unit combination instrument. It directly controls the cut-off and circulation of the regulated medium according to signals from the control system or regulating instruments, achieving automatic control of parameters such as pressure, flow rate, temperature, or liquid level.
This series of products has a simple and exquisite structure, light weight, easy use and maintenance, fire and explosion resistance, and can be quickly opened without leakage. Therefore, it is widely used in automatic control systems for production processes in industries such as petroleum, chemical, metallurgy, pharmaceuticals, papermaking, printing and dyeing.
This series of products includes ZMQ type (pneumatic diaphragm cut-off valve series), ZSQ-III type (pneumatic piston cut-off valve) and other series of products with nominal pressure ratings of PN (Mpa) 1.6, 4.0, 6.4; Valve body diameter range DN (mm) 15~200; The leakage standards include Level III, Level IV, Level V, and Level VI; Suitable for fluids such as steam, water, flammable gases, etc. This series of products has multiple specifications to choose from.

Part Material

Common materials for main components

Valve body: ZG230～450、ZG1Cr18Ni9Ti

ZGCr18Ni12Mo2Ti HT200

Valve core: Metal part: 1Cr18Ni9Ti Cr18Ni12Mo2Ti

Soft sealing part: PTFE、 Graphite+PTFE

Valve seat: 1Cr18Ni9Ti Cr18Ni12Mo2Ti

Valve stem: 1Cr18Ni9Ti Cr18Ni12Mo2Ti、2Cr13

Spring: 60Si2Mn

Diaphragm: Nitrile rubber clip reinforced nylon fabric

Membrane cover: A3

Packing: PTFE、 Flexible graphite