Regulating Valves

Regulating Valves (Hygienic Control Valves) | RV-ST & RV-P | LGN Group
Control Valves — Hygienic

Regulating Valves

Regulating valves provide accurate, automated control of key process parameters such as flow rate and pressure and, depending on the model and application, temperature and tank level. They help maintain stable operation, consistent quality, and efficient performance in hygienic liquid-processing lines.

Overview

Regulating valves continuously adjust valve position based on a control signal to maintain the target process value. They are commonly used for stable flow/pressure control and for control duties beyond flow (depending on the platform).

What regulating valves do

  • Maintain the target flow rate even when upstream/downstream conditions change.
  • Support stable pressure control to protect equipment and process consistency.
  • Depending on model: enable control of temperature and tank level.
  • Enable automation via actuators/positioners and integration into PLC/control systems.

Typical applications

  • Hygienic processing in dairy, beverage, food, brewery, pharma and biotech
  • Flow/pressure control in product lines, CIP circuits and utility sections
  • Process stabilization for quality, repeatability and energy efficiency
  • Control loops requiring automated response and reliable hygienic design

Key benefits

Automation-ready hygienic regulating solutions for precise control and consistent process performance.

Precision control

Accurate control of flow and pressure for stable, repeatable operation in hygienic lines.

FlowPressure

Wide operating range

Supports a broad range of duties depending on valve size, Kv selection, and configuration.

Kv RangeFlexible

Hygienic design

Designed for hygienic processing environments and compatibility with CIP/SIP practices.

HygienicCIP/SIP

Automation-ready

Integrates with actuators/positioners for automated control loops and plant control systems.

PLCPositioner

Service friendly

Maintenance-oriented design with service parts planning and spare kit support.

ServiceSpares

Model options

Choose the regulating platform that matches your control duty and operating range.

RV-STRV-P

Models & variants

Two main regulating valve platforms are commonly selected based on control duty, automation needs, and operating range.

RV-ST Regulating Valve

Single-seat hygienic regulating valve designed for demanding liquid processing where precision control of flow rate or pressure is required.

Single-SeatRegulatingHygienic

RV-P Regulating Valve

Hygienic regulating valve with electro-pneumatic actuation, suited for applications requiring precision control of flow and also control duties beyond flow (depending on configuration).

Electro-PneumaticAdvanced Control

Platform approach

Select by duty: flow/pressure regulation, required control accuracy, available signals, and the operating range determined by Kv selection and process conditions.

SelectionKvDuty

Quick selection guide

Choose the platform that best matches your control duty and automation requirements.

Choose RV-ST when you need

  • Single-seat regulating valve for hygienic processing lines
  • Precision control of flow rate or pressure
  • Reliable automated performance and a modular, service-friendly design
  • Operating range selected via Kv/trim configuration

Choose RV-P when you need

  • Electro-pneumatic actuation for precise regulation
  • Control duties beyond flow (e.g., pressure/temperature/level depending on configuration)
  • Wide operating range based on Kv selection
  • Automation-ready integration with plant control loops

RV-ST Regulating Valve

Hygienic single-seat regulating valve platform for stable control performance in demanding liquid processes.

Key benefits

  • Reliable, automated performance
  • Modular design for flexibility and easier maintenance
  • Strong control characteristics for hygienic processing duties
  • Wide operating range (selected via Kv/trim configuration)

Configuration notes

  • Select Kv to match the exact process operating point and control authority
  • Consider upstream/downstream pressures and required setpoint stability
  • Connection standard and seal material should match site requirements
  • Automation accessories depend on control signal and plant architecture

Need RV-ST sizing help?

Send flow range, pressures (upstream/downstream), product/media, temperature range, and connection standard. We will recommend size, Kv and configuration.

Request RV-ST Proposal

RV-P Regulating Valve

Hygienic regulating valve with electro-pneumatic actuation for precise regulation and advanced control duties.

Key benefits

  • Precision flow control
  • Advanced hygienic valve design
  • Dedicated protection and reliable operation
  • Large operating range based on Kv selection

Platform & versions

  • Built on a hygienic single-seat valve platform approach
  • Kv value is flexible; lower element can be exchanged (configuration dependent)
  • Manual and aseptic versions are available (where required)
  • Normally open/closed actuator options depending on configuration

Technical data (catalog)

Typical values shown below; final data depends on size and configuration.

Parameter Value Notes
Max. product pressure 10 bar (1000 kPa) Typical catalog value (configuration dependent)
Min. product pressure Full vacuum Typical catalog value
Temperature range (EPDM) -10 °C to 140 °C Seal material dependent
Flow range Kv (ΔP = 1 bar) 0.5 to 110 m³/h Depends on selected size/Kv
Max. pressure drop 5 bar (500 kPa) Typical catalog value
* For exact sizing, please provide flow range, pressures, media, temperature range, and connection standard.

Need RV-P sizing support?

Share your media, target flow range, upstream/downstream pressures, temperature range, and connection standard. We’ll recommend the correct model, Kv and configuration.

Request RV-P Proposal

Selection checklist

Send these details for correct valve sizing, model selection and connection recommendation.

Process data

  • Media / product type
  • Target flow range (min/normal/max)
  • Upstream pressure and downstream pressure (or ΔP range)
  • Operating temperature range
  • Connection standard (clamp/weld and site standard)

Control requirements

  • Control duty: flow / pressure / other (temperature/level depending on setup)
  • Required control accuracy and response time
  • Available control signal (e.g., 4–20 mA / fieldbus / pneumatic)
  • CIP/SIP expectations and hygienic documentation needs
  • Preferred seal material and spare parts planning

Send your process data — we’ll size it for you

Provide flow range, pressures, media, temperature range, and connection standard. We’ll propose RV-ST or RV-P, valve size, Kv and configuration with a clear quotation.

Get a Technical Proposal

FAQ

Quick answers to common regulating valve questions.

What is a regulating valve?

A regulating valve is a control valve that adjusts its position to maintain a target process value (e.g., flow or pressure) based on a control signal.

How do I choose between RV-ST and RV-P?

Choose based on your control duty, automation preference, and operating range (Kv selection). RV-P is typically selected when electro-pneumatic actuation and broader control duties are required; RV-ST is a robust single-seat regulating platform for flow/pressure control.

What data do you need to size a regulating valve?

Flow range, upstream/downstream pressures (or ΔP range), media, temperature range, connection standard, and the control duty (flow/pressure/etc.).

Request a quotation & technical support

Share your process details and we’ll propose the correct hygienic regulating valve solution.

We’ll match the right regulating valve platform to your control duty.

Send flow range, pressures, media, temperature, control duty, and connection standard. We’ll respond with a technical proposal and quotation for RV-ST or RV-P.