Electric Actuated 3-Way T-Port Sanitary Ball Valves - Multi-Voltage

Sanitary valves are designed for hygienic applications where the primary concern is to ensure aseptic conditions without the introduction of harmful substances in the media flow. This is accomplished by valve material selection and machining processes.
Sanitary valve bodies are usually made of stainless steel due to superior corrosion resistance. To minimize particle entrapment and possible bacterial growth, the wetted surfaces are polished to a greater degree than industrial valves. Sanitary gaskets and seals are made from chemically inert material such as PTFE, silicone or Viton. Seal material depends on the specifics of the application.
The two most common types of sanitary valves are sanitary ball valves and sanitary butterfly valves. Sanitary ball valves usually have filler material behind the valve seats to minimize internal cavities. This is feature is called “encapsulated seats.” Like their industrial counterparts, sanitary ball valves can withstand high pressures and temperatures. Sanitary butterfly valves are simpler and lower cost but have lower pressure and temperature ratings.
Some features that differentiate higher quality sanitary valves include 316 stainless construction (vs 304), highly polished internals (8-10 Ra), and encapsulated seats.
Multi-voltage electric actuators use auto-sense circuity to determine the supply voltage and condition it appropriately for internal use. Most multi-voltage actuators are capable of operating on a supply voltage range from 24- 240V AC or DC. Upon receipt of a continuous signal the motor runs until the valve is rotated 90 degrees. When the valve reaches the open or closed position an internal cam on the actuator strikes a limit switch and shuts off the motor. If the electric signal is lost mid-stroke the valve stays in mid-stroke position.
Sometimes upon loss of power it is necessary to have the valve fail to a certain position- ie “fail open” or “fail closed.” Electric actuators accomplish this by a battery backup, or battery safe return (BSR). Upon loss of power the battery backup kicks in and returns the valve to the desired position (i.e open or closed).
Multi-voltage actuators can also be throttled with the installation of additional circuity. This consists of an encoder as well as control and feedback logic. Changing the input signal (usually 4-20mA or 0- 10V) results in a corresponding and proportional change in the position of the valve.
Both of these features- battery safe return (BSR) and digital positioner (DPS)- are available as factory-installed options on Valworx multi-voltage actuators.
Some features that differentiate higher quality multi-voltage actuators include a brushless motor, a thermostatic heater to prevent internal condensation, a manual override mechanism, a weatherproof enclosure (normally IP 67/NEMA 4X or higher) and a dome positioner.
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