Phone: +44 1462 480121
Address: Unit 25, Business Centre West,
Avenue One, Letchworth Garden City, Hertfordshire, SG6 2HB
United Kingdom

STL Power & Process Controls – Energy Under Control

Call Us: +44 1462 480121


Insulation for Stock Valves

Effective 1st March 2023 as part of our Energy Consideration Strategy As of 1st March 2023, all of our stock RTK valves and globe valves will be automatically supplied with a bespoke Insulation Jacket The jacket should be put on […]

RTK Test Box (REact-TestOne)

A must have tool for service engineers – The RTK test box for REact30E, 60E, 100E Electric Actuators Use the REact-TestOne to test RTK Electric Actuators form the REact series (REact30E, 60E, 100E) Has a toggle switch which allows the […]


RTK has been approaved for UKCA Mark RTK products have been approved for the new UKCA marking (according to the Pressure and Safety Directive SI 2016 No.1105) The new UKCA marking will replace CE marking for all products intended to […]


Electric Actuators for adjusting butterfly valves, dampers, & gate valves 60° travel Self-locking 3-point step control (open-stop-close) Separate force and limit switches for both directions Valve position indicator Manual handwheel Read more


STL have become a 2nd generation family business! In April 2022, STL become a 2nd generation family business Managing Director – Emma Downs Sales Director – Rod Downs Click “Read more” for full announcement Read more


Circor have launched an app for RTK and Schroedahl products! Scan the QR codes on the RTK or Schroedahl valves or actuators to access essential and specific product data Keep track of products and their maintenance schedules Attach photos and […]

Safe Supplier Verified

We have achieved SafeSupplier accreditation! Gives peace of mind that we’re a safe company to use We’re committed to continuously improving health and safety standards We’re committed to sustainable and ethical practices We work compliantly in line with all current […]

RTK® QCS with Balanced Trim

Designed to all but eliminated downtime Customised for lower flow and higher pressure Balanced trim with 1 or 2 stages Easy to disassembly design Perforated trim design reduces noise Read more


Electric Intelligent Linear Actuators for high-range force output up to 30KN/6750LBF Uses the newest brushless DC (BLDC) motor system, offering high force in a lightweight, compact size and delivering up to 60% energy savings compared to synchronous drives Is programmed […]

RTK REflex CONTROL and SHUT OFF valve with quick change seat (QCS)

Up to 85% faster maintenance time With one or two-stage pressure reduction for high differential pressures Available in both electric or pneumatic actuators NACE specification for chemically corrosive applications Read more