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หมวดหมู่ : ASCO Valve ,  Air-Operated Valves , 
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The ASCO Series 290/390 is a pressure-operated, direct acting angle-body piston
valve built for a number of demanding applications. Its straight-through body design
is available in bronze or stainless steel. The valve is suitable for general service
applications (air, inert gas, water, oil and light slurries) plus steam, hot water and
auxiliary fluids within the food and beverage industry. Anti-water hammer design
and back-pressure resistance ensured extreme high reliability and long service life.
Wide range of option features available including proportional control,
a visual/electrical position indicator or a stroke limiter
Specifications
Valve Actuation
Pressure Operated, Pneumatic - Air Pilot
Body Material
Bronze
Media
Air, Inert Gas, Hot Water, Light Oil, Water, Steam
Pipe / Port Size
1/2 "; 3/4 "; 1 "; 1 1/4 "; 1 1/2 "; 2 "; DN25; DN32; DN40; DN50; DN65; 12 mm; 10 mm
Port Type
G ISO228/1-G BSPP, NPTF
Function
3/2 Normally Closed, 3/2 Normally Open
Flow
From 5.19 to 12 Kv, Over 12 kv
Max Differential / Max Operating Pressure
10.3-34.5 Bar, Vacuum to 10.3 Bar
Standards / Regulations
IEC 61508, SIL, ATEX, ISO, IEC 60529 (Ingress protection), IP66
Features
High flow capability
Back pressure resistant
Maintenance-free actuators
Satisfies Pressure Equipment Directive 2014/68/EU, category 1 (DN > 25) or article 4.3 (DN ≤ 25)