Valve body
Nominal diameter 20、25、32、40、50、65、80、100、125、150、200mm
Nominal pressure PN1.6、4.0、6.4MPa
Flange standards JB79-59、JB78-59
Material: Cast steel(ZG230-450), Cast stainless steel(ZG1Cr18Ni9Ti、ZG1Cr18Ni12Mo2Ti), etc.
The upper valve cover: Ordinary type bonnet:40～+230℃ Heat sink type bonnet:+230～+450℃
Gland type: Bolt pressing type
Packing materials: V-type PTFE packing, Asbestos packing impregnated PTFE, Asbestos braided packing. Graphite packing
The inner valve assembly
Valve core type Single seat piston type valve core
Flow characteristics Equal percentage and linear characteristics
Material: Stainless steel (1Cr18Ni9Ti、1Cr18Ni12Mo2Ti、17-4PH、9Cr18、316L)
Si Tailai stainless steel surfacing alloy, Titanium and corrosion resistant alloy, etc.
Actuators
Type: ZMX (A/B) pneumatic film actuators
Diaphragm materials: Acrylonitrile butadiene rubber clip nylon cloth
Spring range 20～100、40～200、80～240kPa
Gas supply pressure 140～400kPa
Signal interface M16×1.5 或 ZG1/4
Ambient temperature -25～+55℃
Action type of valve: Gas-shut type or Gas Type
Attachments: Locator, Air filter regulator, position control valve, travel switch, valve position transmitter, hand wheel mechanism, etc.
Performance
Leakage amount is less than 0.01% of the rated valve capacity, in Compliance with ANSI B16.104-1976Ⅳ standard.
Return difference with locator: Less than 1% of the full stroke
Without the locator: Less than 3% of the full stroke
Basic error with locator: less than ± 1% of the full stroke.
Without the locator: less than ± 5% of the full stroke.
Note: Above data is acquired when using standard V-type PTFE packing materials
Adjustable scope 50：1