Components & controls
Ridan Adds DN 50 to the VFG-2R Control Valve Production Line
Ridan's Leshkovo plant has begun serial production of universal VFG-2R DN 50 control valves, completing the local range from DN 15 to DN 50. In 2027, the company plans to expand the low-Kvs range for systems with a design flow rate down to 15 l/h, depending on operating conditions.
The company announced the production launch on 6 November 2026.
Ridan's Leshkovo plant has launched serial production of universal VFG-2R DN 50 control valves. The Russian product line now covers the full DN 15–50 range, with DN 15 variants available in Kvs 1.6, 2.5, and 4 m³/h for systems with low heat-transfer-fluid flow rates.
Localisation and Quality Control
Key components of the localised VFG-2R versions are manufactured on the company's own production line from blanks with full-cycle machining. Finished valves undergo testing for strength, external and internal tightness, stem non-sticking, and paint-coating quality. Each control valve is tested on a life-test rig for 100,000 cycles at limit parameters, which, according to the company, corresponds to a service life of more than 25 years.
Design and Operating Characteristics
The ductile-iron body provides a nominal pressure rating of PN 25. The redesigned construction reduced overall dimensions by more than 30 % according to the manufacturer; the announcement does not specify the comparison baseline. According to the manufacturer, the gland assembly provides external tightness at the stem, while the soft seat seal reduces leakage through the closed valve by an average of up to 10 times compared with competing solutions.
A dynamic range of 15:1 or higher maintains control accuracy under uneven demand. According to field operating data, the valves operate reliably both under high inlet pressure differentials and at low heat-transfer-fluid flow rates. This is particularly relevant in summer mode when a single domestic hot-water circuit is in operation, as flow rates drop significantly and vary throughout the day.
Line Expansion in 2027
In 2027, Ridan plans to release additional VFG-2R DN 15 variants with Kvs ranging from 0.25 to 1.0 m³/h. This will expand equipment selection options for systems with low design flow rates — down to 15 l/h depending on the design operating mode.
Product references in the 6 November announcement
- DN 15 — Kvs 1.6 m³/h — 065B2386R1
- DN 15 — Kvs 2.5 m³/h — 065B2387R1
- DN 15 — Kvs 4.0 m³/h — 065B2388R1
- DN 20 — Kvs 6.3 m³/h — 065B2389R1
- DN 25 — Kvs 8.0 m³/h — 065B2390R1
- DN 32 — Kvs 16.0 m³/h — 065B2391R1
- DN 40 — Kvs 20.0 m³/h — 065B2392R1
- DN 50 — Kvs 32.0 m³/h — 065B2393R1
The company also reports a VFG-2R range extending to DN 250. Original announcement — Ridan.
Current availability and delivery terms need separate confirmation. The endurance-test result is not an unconditional service-life guarantee for every installation.
ORIGINAL SOURCE
Ридан ↗Visit the original source for additional details.
