Product Overview
ZXM series pneumatic diaphragm straight-through sleeve regulating valve is a pressure balance type regulating valve. It adopts sleeve guiding and pressure balance type dual sealing face valve core structure. With multiple spring actuators, it boasts compact structure, light weight and good stability. S streamlined fluid passage realizes small pressure drop loss, large allowable pressure differential, low noise and great flow capacity. It is widely used to accurately control technological parameters (such as pressure, flow rate, temperature and liquid level) of gas, liquid and other media at set values. It is especially suitable for workplaces with large flow rate and large differential pressure before and after the valve.
This series product includes standard type, heat dissipation type, low temperature type, regulation cutoff type, siphon seal type and jacket thermal insulation type. Its nominal pressure level is PN (Mpa) 1.6, 4.0, 6.4 and 10.0; caliber range of valve body DN (mm) is 20～200; applicable fluid temperature is from -196℃ to +560℃, with many grades in the range. Leakage standard includes grade IV, grade V and grade Vi. Flow characteristic includes straight line and equal percent. Various types and specifications are available.
Product Features
?With balance type valve core structure, axial unbalanced force is small, allowable pressure differential is large and stability is good.
?Sleeve owns strong interchangeability, convenient disassembly and assembly, as well as easy repair.
?All metal valve core structure applies to many workplaces and reaches grade IV leakage standard. ZXMQ type soft seal valve core reaches grade VI leakage standard.
?In fluid mechanics principle, valve body is designed with a passage of uniform section, low flow resistance and wide adjustable range. Inherent adjustable ratio is 50; rated flow coefficient increases by 30%.
?Actuator adopts multiple spring structure, whose height is reduced by 30% and weight is reduced by 30%.
?ZXMV siphon seal regulating valve forms complete seal of mobile valve road, and thus eliminates fluid leakage.
?ZXMJ regulating valve with thermal insulation jacket is used in places where cooled fluid easily crystallizes, solidifies and jams.
零件資料
Valve body and valve cover: HT200, ZG230-450, ZG1Cr18Ni9Ti
Valve core and valve seat: 1Cr18Ni9Ti, bead weld of Stellite alloy
Soft seal valve head: reinforced PTFE
Padding: PTFE, flexible graphite
Siphon bellows: 1Cr18Ni9Ti
Gasket: rubber asbestos plate, 10#, 1Cr18Ni9Ti asbestos spiral wound gasket
Diaphragm cap: A3
Corrugated diaphragm: nitrile rubber with reinforced dacron fabric
Spring: 60Si2Mn
Valve rod and push rod: 2Cr13, 1Cr18Ni9Ti
Bush: 2Cr13
Screw: 2Cr13
Technical Parameters


*This product performance index implements GB/T4213-92 standard.
◆Boundary dimension table of standard type, heat dissipation type and high temperature type


*Height (H) of heat dissipation type and high temperature type is PN16.
** Height H1 and H of jacket type increases by 15% respectively.
◆Boundary dimension table of siphon seal type      Unit: mm


◆Specification and Weight


* Weight of heat dissipation high temperature type in the table is PN16; low temperature type is PN40.
◆Connection Dimension and Standard
?Flange standard: cast iron flange conforms to JB78-59; cast steel flange conforms to GB9113-88 and JB/T79.1-94.
?Flange sealing surface type: PN10 and PN16 are male face; PN40 and PN64 are male and female face; valve body is female face.
?Structure length conforms to GB12221-89 standard.
?Gas signal interface of diaphragm actuator: internal thread M16X1.5
?Heat-carrying agent interface of jacket thermal insulation type: butt weld Φ18X4
*Valve body flange and tip-to-face distance of flange can be made according to standards specified by users, such as ANSI, DIN and JIS etc.
◆Ordering Instruction
Users shall provide the following information when placing an order:
?Regulating valve name and type
?Nominal diameter (mm)
?Nominal pressure (MPa)
?Rated flow coefficient (Kv)
?Inherent flow characteristic
?Medium name
?Working temperature and range
?Action mode of the whole machine
?Valve body, valve internals and padding material
?Attachments
?Other special requirements