Unique RV-ST
The Alfa Laval Unique RV-ST is a versatile hygienic flow rate control valve that provides continuous flow and pressure control for high- and low-volume liquid-handling applications. With easy setup and an electropneumatic positioner, it meets the highest process demands for hygiene and safety across the dairy, food, brewery and many other industries.
Flow rate control valve for quick, accurate control of process flow and pressure
- Ensures constant pressure
- Maintains constant flow – even at low volumes
- Regulates pump flow or pressure
- Meets all process requirements, covering a broad range of Kv values
Meet exacting demands for process hygiene, safety, and flow and pressure control with the Alfa Laval Unique RV-ST regulating valve. This versatile flow rate control valve and regulating valve covers Kv values from 1 to 250 m3/hour to meet most customer requirements – even at very low flow rates. Built on the proven Unique SSV platform, the RV-ST shares standard components with the Alfa Laval Unique valve series, reducing parts inventory and costs and simplifying replacement, when required.
How does the flow rate control valve work?
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 end of the actuator cylinder support the stem and ensure perfect alignment.
Operating principle
The electro-pneumatic controller 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: HNBR or FPM
Advanced electro-pneumatic controller
The flow rate control 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 flow rate regulator 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. Its 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 Unique 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 NC (Normally Closed) to NO (Normally Open) and vice versa.
Close at Hand catalogue
The hygienic equipment product catalogue "Close at hand" includes product leaflets, links to animations, brochures and lists for ordering purposes.
CAD portal
The Alfa Laval CAD portal is an essential platform for downloading detailed product information, 2D drawings and 3D product models.
Service
Our dedicated Global Service Network supports you with parts and expertise, wherever you are, whenever you need it. By ensuring greater uptime, availability and optimization, we help bring you peace of mind, and maximize your return on investment. We can work with you to integrate our services into an Alfa Laval Service Agreement for predictable and worry-free operations.
Learn more about our service offer Troubleshooting
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