2/2 Coax Solenoid

Basic Principle

How 2/2 coaxial solenoid valves work.

Valve working basics.

2/2 normally closed coaxial solenoid valve Pressure:Flow P to A Maximum pressure Flow A to P 16 Bar	Fail safe Closed - No Flow	Energised Open - Full Flow
2/2 normally open coaxial solenoid valve Pressure: Flow P to A Maximum Flow A to P 16 Bar	Fail-safe Open - Full Flow	Energised Closed - No Flow

Technical Data Sheets

2/2 Coaxial solenoid valve orifice sizes and flow rates.

Coaxial solenoid operated valves are available with a range of orifice sizes for each port connection size. The orifice is the internal diameter of the stainless steel tube where the media flows along, hence the bigger this orifice or internal tube diameter the higher the flow coefficient or flow rate for the coaxial valve and of course the larger the surrounding valve body needs to be to accommodate this. Valve users can choose from a range of orifice sizes to suit their flow requirements for each chosen port size, such as 1/2" port would typically be available with 10mm or 15mm orifice and 3/4 port available with 10mm, 15mm and 20mm orifice, although there are logical limitations due to the port size of choice. For example choosing a large orifice with a very small port connection would be inhibitive as the flow restriction of the smaller port exceeds the flow capability of the orifice or tube hence making the additional cost of a larger tube and valve body uneconomical and of no additional benefit in terms of increased flow.

2/2 Coaxial solenoid valve control voltages.

Coaxial solenoid actuated valves require a control voltage or electrical signal to operate. The design of the coaxial valve creates a small challenge for AC or alternating voltages 50/60Hz as the coaxial valve design is unable to incorporate a shading ring which is commonly found is general solenoid valve design to prevent the humming or buzzing noise sometimes attributed to AC voltage supply. In the case of solenoid operated coaxial valves this has been over come by utilising a DC coil only, with AC voltages converted to DC (Direct current) be means of a full bridge rectified electrical DIN connector. Coax valve users are then able to supply their coaxial valve with 230vAC 50/60Hz electrical supply with the rectified connector converting this to 230vDC. Standard coax valves are supplied either 24vDC or 230vAC (Rectified) with other options for 12vDC, 48VDC and 24vAC (rectified to 24vDC), 48vAC (rectified to 48vDC), 110vAC (rectified to 110VDC), with typically most other specialised voltages made to order.