Question 1

What is a solenoid valve?

Accepted Answer

It is an electromechanical device that uses an electromagnetic coil to open or close the passage of a pilot fluid (typically compressed air or hydraulic oil). When the coil is energized, the plunger moves and allows or blocks flow. They are the essential component for remote control of pneumatic and hydraulic actuators in automated and safety systems.

Question 2

What is directional control in pneumatic valves?

Accepted Answer

Directional control defines where the pilot fluid is directed to move the actuator. It is specified with port and position nomenclature: a 3/2 valve has 3 ports and 2 positions (for single-acting actuators), and a 5/2 has 5 ports and 2 positions (for double-acting actuators). The configuration determines whether the actuator fails open, closed, or in last position.

Question 3

What are the advantages of the Versa brand?

Accepted Answer

Versa Valves (USA) stands out for its 100% 316 stainless steel and anodized aluminum construction, resistant to marine and corrosive environments. It offers SIL 3 certification (IEC 61508), ATEX/IECEx for classified zones, and meets NAMUR for direct actuator mounting. Its response times are among the fastest in the market (<50 ms).

Question 4

What automation applications use solenoid valves?

Accepted Answer

They are used as pilots for pneumatic and hydraulic actuators in ESD (emergency shutdown) systems, as vent valves in control panels, in air preparation systems (filter-regulator-solenoid), in pneumatic logic sequences, and as trip elements in SIL-certified Safety Instrumented Systems (SIS).

Question 5

What are NAMUR certifications in solenoid valves?

Accepted Answer

NAMUR (VDI/VDE 3845) is a mechanical interface standard that allows direct mounting of the solenoid valve on the actuator without intermediate piping, reducing leak points and response times. Versa NAMUR valves mount directly on Perar actuators and others, simplifying installation and improving the reliability of the automated package.

Question 6

What sizes and pressures do Versa solenoid valves handle?

Accepted Answer

Versa valves are available in 1/4" to 2" NPT connections, with working pressures up to 6,000 psi in hydraulic models and up to 300 psi in pneumatic models. Bodies can be 316 stainless steel, aluminum, brass, or carbon steel, with coils for 24 VDC, 120 VAC, and 240 VAC voltages, available in explosion-proof versions.

Welded Body Trunnion

Pneumatic & Solenoid Valves.

Available types

Series V Solenoid

Pilot & Directional Control Valves

Modular Air Packages (MAP)

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