Sitecna Air Preparation and Pneumatic Flow Control Valves

Sitecna Srl has been providing engineering solutions for industry since 1983 and started to develop their own manufacture range of products over 20 years ago. This range of products now covers air preparation and flow control for pneumatic applications with ATEX, GOST EAC & EX certification and SIL3 compliance. Their designs focus on high performance in harsh environments whether they are corrosive, abrasive or low temperature.  

The Italian manufacturer Sitecna Srl produces a range of pneumatic valves and regulators designed for harsh and hazardous conditions. ATEX certification is included as standard and there are options for ambient temperature duty down to -55degC. The standard construction for filter regulators, regulators, filters, volume boosters and lock up valves are either 316L stainless steel or epoxy coated copper-free aluminium.

Sitecna has achieved IEC 61508 Functional Safety Level 3 (SIL3) compliance through TUV Rheinland for the filter regulators, pressure regulators, volume boosters, quick exhaust valves, pneumatic pressure switch and air operated 3/2 & 5/2 spool valves. In combination with the ATEX, GOST EAC & Ex certification and corrosion resistant design, this testing will support reliable operation for the expected lifetime of the products.

Sitecna's point of use air preparation products include filter regulators and pressure regulators from 1/4" to 1", and filter units from 1/4" to 2". Construction is either 316L stainless steel or copper free aluminium with epoxy coating. Maximum inlet pressures are up to 30bar for stainless steel or 25bar for aluminium.

Sitecna Volume Boosters from 1/4" to 1" provide increased flow and exhaust capacity for use with valve positioners and pneumatic actuators. Sitecna Lock Up Valves are available in single or dual circuit function to maintain position of an actuator in the event of falling pilot pressure. This prevents uncommanded valve operation and allows time for operator involvement to resolve the issue. Pneumatic pressure switches detect falling pressure and with 2 way or 3 way switching, can close a circuit or select an alternative pressure source to prevent valve failure.

Sitecna Quick Exhaust valves are available up to 1" to increase the closing speed of an actuator by bypassing the directional control valve. The Flow Regulators when fitted to the outlet or exhaust ports of a directional control valve allow the fine adjustment of actuator speed. Back Pressure Regulators maintain a set pressure upstream of the valve to ensure that instruments receive the correct pressure and are not starved by higher consumers.

SItecna 3/2 and 5/2 spool valves are the mainstay of pneumatic logic circuits used in the control of process valves. Their DP range includes pilot operated/spring return, dual pilot operated and manual operated versions in 316L stainless steel. The 1/4″ 3/2 and 5/2 valves are also available in manual reset or combined manual/pilot operated versions for operator intervention. Silencers and Bug Screens are essential to protect the exhaust ports of these valves.

Sitecna pressure gauges are ATEX certified and with sizes and ranges to suit all their regulator products. The overpressure limiter is intended to protect process gauges and instruments from damaging overpressure. The device is a valve that will close against a spring when the pressure exceeds the setpoint thus protecting the downstream instrument. The VA flow meter is often used to precisely meter air or gas flows for process control and sampling purposes.