Back To Top
ASCO™ 330A Volume Booster Valves
The ASCO Series 330A Volume Boosters are flexible, robust, and highly reliable boosters designed to improve the pneumatic performance of both on/off and control valves.
Available in sizes from 1/2 to 2 inches, the booster range offers a great deal of flexibility. Stainless steel and aluminum versions are available covering an operating temperature range of -60° C to +90° C. Solenoid valves can be close coupled to the booster via a NAMUR pad mount, making solenoid valve selection easier as well as improving performance. A unique mounting option enables the booster and actuator to be removed without disturbing the instrument piping.

The Series 330A Volume Boosters are just one product in a broad portfolio of valve actuator control components. These range from filter regulators and solenoid valves to cabinets that enable the operation and partial stroke testing of emergency shut-down valves, forming part of a safety instrumented system.
ASCO™ 330A Volume Booster Valves


1/2": 4.0/4.6, 1":11/12.7, 1 1/2": 41/47, 2": 49/57
Temperature Range
-60°C to + 90°C ambient
Anodized aluminum or 316L stainless steel
Control Ratio
1 : 1
Pipe Size
1/2"; 1"; 1 1/2"; 2" ANPT and BSP/ISO 228/1


  • Large flow capacity, up to Cv/Kv 49/57, provides faster response times on large actuators
  • Suitable for both on/off and (Partial Stroke) control applications
  • Using dedicated advanced seal temperatures from -60°C to + 90°C
  • Exida certified SIL 3 capable
  • NAMUR pattern integrated for direct mount of the solenoid valve
  • Integrated mounting holes
  • Optional inlet filter avoids dirt ingress even without Filter Regulator (can be used on control circuit only)
  • Optional protective cap prevents unauthorized field adjustment
  • Certified for ATEX/IECEx and CUTR and IP66/67
  • External NACE compliant for the stainless-steel types