● Overview
ZMA/BP, ZMA/BN films through pneumatic valve seat dual- oriented structure , equipped with multi-spring actuator. With a compact, light weight, sensitive , valve capacity , flow characteristics of precision, easy disassembly . Widely used for precise control of process parameters gas, liquid, steam and other media such as pressure , flow , temperature, level maintained at a given value . Especially for the larger pressure, and allows a large amount of leakage is not very clean media occasions .
This series has a variety of standard varieties , bellows sealed , jacket insulation type. Nominal grade products are PN16, 40,64; body diameter range of DN25 ~ 400. For fluid temperature from the range of -250 ℃ ~ +560 ℃ variety of grades . Leakage standards Ⅲ and Ⅳ level , flow characteristics such as linear or equal percentage . Choose from a variety of different specifications .
● Main parts and materials
Body, bonnet : HT200, ZG230 ~ 450, ZG1Cr18Ni9Ti
Valve, valve seat : 1Cr18Ni9Ti, Secretary Levin titanium alloy welding
Packing : PTFE, flexible graphite, stainless steel bellows
Gasket: Rubber asbestos , 1Cr18Ni9Ti, graphite spiral wound gasket
Membrane cover : A3
Corrugated diaphragm : NBR clip reinforced polyester fabric
Spring : 60Si2Mn
Stem , putter : 2Cr13, 1Cr18Ni9Ti
Bushing : 2Cr13
Soft seal spool : PTFE
