Product Description:
ZMQ/ZSQ series pneumatic shut-off valve is an actuator unit in the pneumatic unit combination instrument. It directly controls the cut-off and circulation of the regulated medium according to the signal from the control system or the adjustment instrument, and achieves automatic control of parameters such as pressure, flow, temperature or liquid level.
This series of products has simple and exquisite structure, light weight, easy use and maintenance, fire and explosion-proof, quick opening can achieve no leakage, so it is widely used in the automatic control system of the production process in petroleum, chemical, metallurgy, pharmaceutical, papermaking, printing and dyeing and other industries.
This series of products includes ZMQ type (pneumatic membrane shut-off valve series), ZSQ-III type (pneumatic piston shut-off valve) and other series of products, with nominal pressure levels of PN (Mpa) 1.6, 4.0, 6.4, valve body diameter range DN(mm) 15 ~ 200, leakage standards such as class III, IV, V, VI; suitable for fluid steam, water, combustible gas, etc. This series of products has a variety of specifications to choose from.
Part material
Common materials for main parts
Valve body: ZG230~450, ZG1Cr18Ni9Ti
ZGCr18Ni12Mo2Ti、HT200
Valve spool: metal part: 1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Soft seal part: PTFE, graphite + PTFE
Valve seat: 1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Stem: 1Cr18Ni9Ti, Cr18Ni12Mo2Ti, 2Cr13
Spring: 60Si2Mn
Diaphragm: Nitrile rubber clip reinforced nylon fabric
Membrane cover: A3
Fillers: PTFE, flexible graphite