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美國ASCO阿斯卡S290氣控閥系列參數如下：
壓力操作,不銹鋼閥體,管夾或對焊接口,DN10-65MM,介質溫度:-10℃～+184℃，操作壓差：0-16公斤
• Water Treatment
• Pharmaceutical
• Petrochemical
• Food & Beverage
• Reliable and Robust Proportional Control
 • Proportional flow control via 4-20mA signal (open loop)
 • Closed loop control via external process signal
 • Fail closed construction: valve closes upon loss of power
 • IP66 enclosure allows valve to be used outdoors
 • LED indicators for valve status and diagnostic functions
 • Position feedback signal for optimal flow control
 • Manual opening and closing function simplifies start up without controller system
 • High flow rate due to angled seat design
 • Handles viscous fluids up to 2700 SSU
• Energy Saving
 • No air consumption when set point position is reached
 • Low power consumption (3.6 W) when set point position is reached
 • PositionerD is factory adjusted and tested saving installation time and cost
• Easy Calibration
 • Initial regulation parameters can be modified on computer with downloadable APC software
 and ASCO RS232 converter cable
Specifications
Series Open Close Fluids Steam Min. Max.
Pipe
Sizes
(in)
Operator
Size
(mm)
Max.
Fluid
Temp.
?F (C?)
Body
Material
Response
Time (sec.)
Operating Pressure
Differential (psi)
Pilot
Pressure (psi)
290 with PositionerD
2-Way, Normally Closed
(Suffix PDB67) ¨
90 1" - 2"
1/2" - 3/4"
1" - 2"
1.0
2.0 2.0
2.0 2.5
1.0
63
0 - 150 Bronze or
Stainless Steel 0 - 230 366 60 116
¨?Accuracy < 2%; Hysteresis < 2%; Repeatability < 1%; Linearity < 5%
美國ASCO JOUCOMATIC公司是世界500強之一的美國艾默生集團成員，是一家主要生產和銷售流體控制閥以及氣動控制元件的跨國公司，具有100多年的生產技術經驗，在擁有超過30家工廠，為客戶提供超過23,000的流體控制產品。ASCO旗下擁有眾多品牌:等都是ASCO的成員，其中ASCO/RED HAT，SIRAI品牌包括通用型產品及部分適用于特殊工礦的產品，可控制普通介質。GENERAL CONTROL為燃燒系列閥，介質可為燃油等。SCIENTIFIC是微型閥適用于醫療器械及其他分析產品行業。JOUCOMATIC是專業的氣動控制產品的品牌，而TRI-POINT為壓力溫度開關產品。