ED single-port control valves have balanced plugs and cage-guided trim for all general applications with process temperatures up to 593°C (1100°F). They are available in sizes ranging from NPS 1 to 30 and pressure ratings up to CL600, with several body configurations, including ED, EAD, and EDR.
- ED: Globe body sliding-stem valve with push-down-to-close action
- EAD: Angle body sliding-stem valve with push-down-to-close action
- EDR: Globe body sliding-stem valve with push-down-to-open action
In small to medium sizes, these valves utilize a clamped trim design, meaning that the cage and seat ring are clamped into the body using compression from the valve bonnet. In large sizes, the trim is hung in the valve body and the seat ring is bolted into the valve body. These valves provide up to Class IV shutoff, utilizing graphite piston rings which seal between the plug and cage. For tighter shutoff applications, shutoff can be improved to Class V with the use of the optional C-seal or Bore Seal.
A range of noise abatement trims are available including Whisper Trim™ I and Whisper Trim III cages, and WhisperFlo™ trim. These trims help with aerodynamic noise attenuation in gas services. For more information about these noise abatement trims, please see our Aerodynamic Noise Control Trim webpage.