Alfa Laval Unique RV-ST Regulating Valve
The Alfa Laval Unique RV-ST Regulating Valve is the third generation of the Alfa Laval single-seat regulating valve designed to meet the highest process demands of hygiene and safety. Built on a well-proven platform from an installed base of more than a million valves. It is ideal for high-volume, hygienic liquid processing applications that require precision control of flow rate or pressure.
RV-ST has a vast range of Kv-values to fit customers exact needs. 1½” – 4″ sizes come with a plug seal to also function as a shut-off valve, where 1″ sizes do not have a plug seal.
With an integrated IP converter and push-and-play setup, the Unique RV-ST regulating valve is able to meet the highest process demands for hygiene and safety.
Hygienic corrosion-free regulating valve
The Alfa Laval Unique RV-ST is an intelligent hygienic regulating valve that safely and effectively controls process flows with Kv values between 9 and 246m³/hour. It is designed for a wide range of fluid handling duties, such as metering, blending, weighing and filling system duties, in the food and beverage, brewery, biotech and pharmaceutical and chemicals industries. Corrosion-free features, such as tapered stainless steel stems, ensure product safety according to EHEDG (European Hygienic Engineering & Design Group) guideline.
Advanced electro-pneumatic controller
The Unique RV-ST regulating valve comes with an advanced electro-pneumatic controller with an integrated IP converter. This offers superior control of product flow by combining different pressure drops and stroke lengths. It also features a contact-free analog position sensor, which measures the position of the valve spindle, and a standard Profibus DP-V1 or optional DeviceNet communications interface. Analogue or binary feedback is available as options.
Easy push-and-play regulating valve setup
With a push of a button, the Alfa Laval Unique RV-ST regulating valve automatically calibrates itself so that it is fully operational.
Reliable, easy to maintain
Built on the proven Unique SSV (Single Seat Valve) platform, which has an installed base of more than one million valves, the Alfa Laval Unique RV-ST UltraPure offers the same reliability, safety and ease of maintenance. It offers protection class IP65 and IP67 for tough process environments.
A regulating valve with maximum flexibility
It uses the same few moveable components, spare parts and maintenance tools and procedures as Alfa Laval SSV valves. Using the upgrade kit available, it is possible to upgrade older regulating valves with the new control unit. The new control unit also supports rebuild of the actuator from Normally Closed (NC) to Normally Open (NO) and vice versa.
Products Benefits
- Intelligent hygienic regulating valve
- Easy push-and-play regulating valve setup
- Maximum flexibility
Construction
The Alfa Laval Unique RV-ST regulating valve with integrated IP converter is a third-generation single-seat valve. It features;
- A broad selection of stainless steel tapered valve stems
- An Alfa Laval Unique actuator with digital electropneumatic process controller for precise control of product flow and pressure
- Rugged, long-lasting plastic stem bushings that eliminate metal-to-metal galling
Valves from 1½” to 4″ have the same standard plug seal as the entire Alfa Laval Unique valve series. The 1″ needle valve does not have a plug seal.
The stems are threaded to the actuator shaft, which eliminates the coupling between the stem and the actuator. Bushings at the end of the actuator cylinder support the stem and ensure perfect alignment.
Operating Principle
The Alfa Laval Unique RV-ST regulating valve is controlled from a remote location by means of a digital electropneumatic process controller. The control unit comes in two versions: top control with display or basic control without display. It has an analogue 4-20 mA communication interface and is protected according to IP65 and IP67.
Options
- Male parts or clamp liners in accordance with required standard
- Product-wetted seals in HNBR or FPM
- Maintainable actuator
- External surface finish blasted
- Optional plug seal: HBNR or FPM
