Unique RV-ST
Alfa Laval Unique
RV-ST Valve
The Alfa Laval Unique RV-ST is a versatile hygienic Regulating 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.
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.
Unique RV-ST
Benefits
- Reliable, automated performance
- Maintains constant flow – even at low volumes
- Controls process flows with Kv values between 9 and 246 m3/hour
- Complies EHEDG guidelines
Pressure
Max. product pressure: 10 bar (1000 kPa)
Min. product pressure: Full vacuum
Air pressure: 5 – 7 bar (500 to 700 kPa)
Temperature
Temperature range: -10°C to +140°C (EPDM)
Materials
Material: PPS, stainless steel
Cover: PC
Seals: EPDM
Product wetted steel parts: 1.4404 (316L)
External finish: Semi-bright (blasted)
Internal finish: Bright (polished), internal Ra < 0.8 µm
Other steel parts: 1.4301 (304)
Plug seal: EPDM (optional HNBR or FPM)
Other product wetted seals: EPDM (optional HNBR or FPM)
Other seals: NBR
Unique RV-ST Technical Data
Download the Full
Specification Sheet
Unique RV-ST Valve Key Features
Hygienic & Corrosion-Free
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 246 m3/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) guidelines.
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 are 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 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.
How the Unique RV-ST Works
Construction
The Alfa Laval Unique RV-ST is a Single-Seat Valve. It features:
A broad selection of stainless steel tapered Valve stems. An actuator with digital electropneumatic process controller for precise product flow and pressure control. Long-lasting plastic stem bushings 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 has no plug seal.
Threading the stems to the actuator shaft eliminates the coupling between stem and actuator. Bushings at end of the actuator cylinder support the stem and ensure alignment.
Operating Principle
The Alfa Laval Unique RV-ST Regulating Valve is controlled from a remote location with a digital electropneumatic process controller. The 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.
Unique RV-ST Product Documents
Recent Success Story
Dairy Expansion Improves Production Capacity, Hygiene, Uptime, and Savings
To boost productivity, the TINE Dairies, Norway’s largest Dairy producer, distributor and exporter, selected Dairy equipment from Alfa Laval based on proven safety, hygiene and economy.
Unique RV-ST
Servicing & Maintenance
Unique RV-ST Valves are built for a wide range of duties across the Dairy, Food, Beverage, Personal Care, Biotechnology and Pharmaceutical industries.
Related Industries
Alfa Laval technologies improve sustainability through enhanced efficiency, reducing waste and emissions, while increasing yields and end product quality.
Alfa Laval provide high-performance components to maximise efficiency in tasks across the Dairy industry, from yoghurts and cheeses to milk, cream and butter.
Alfa Laval’s solutions increase output while minimising contamination and enhancing efficiency, making them ideal for applications in the Personal Care industry.
