Certificates
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3-A — sanitary standards
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Meets ATEX requirements
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Compliance with EU standards
APV RG4, RGE4 Regulating valves
Single-seat regulating valves control processes in pipelines of food production: temperature, flow, pressure, filling level. The interactions of individual sections, disconnections or switching of technological lines are regulated.
Brief specifications
- Type: diaphragm with pneumatic actuator
- Control Signal: P/P (3-15 ft/sq. inch isb. = 0.02-0.1 MPa) or I/P (4-20mA)
- Dimensions: ISO 1” - 6” external. Ø pipes, DIN DN25-150
- Housing types: L – T
- Pressure range: 10 – 25 bar
- Connections: sanitary flange (RG4), butt welding end (RGE4)
The lineup: RG4, RGE4. Aseptic version: RGEMS4, RGMS4
Operation
The seat valves are equipped with membrane actuator and position sensor. They have two states — open and closed.
The valve stem movement operation is performed by a pneumatic actuator with air connection. The regulating valve function is to maintain the set process pressure or feed rate conditions.
The flow coefficient Kv is defined as the maximum water flow (m3/h) at ΔP = 1 bar
Chart of characteristics
Linear
- The flow rate varies depending on the position of the valve shaft.
- Used to control the liquid level (flow rate) at constant pressure.
- Change of equal volume with the same change in lift, regardless of position.
Equal percentage (Eq%) or logarithmic
- The same % change in flow rate for the specified fixed shaft lift at any point of the curve.
- Usually used for pressure monitoring (DR) at constant flow.
Flow control circuit
The flow rate is effectively controlled when the valve stem moves between 30% - 70%
Fields of application
Linear
Large amplitude of flow changes and small ΔP at the valve
Equal percentage
High ΔP and low amplitude of flow change at the valve
Components
- Samson aseptic membrane actuated: Built-in or comply with German Namur standard.
- Samson positioner.
- Interchangeable valve cones linear or equal-percentage.
- Connection with butt-welded flanges.
RG4
- Actuator
- Positioner
- Yoke
- Coupling
- Progress indicator
- Shaft seal
- Housing
- Seat seal
- Valve seat
- Valve cone
- Connecting flanges
RGE4
- Actuator
- Positional device
- Yoke
- Coupling
- Shaft seal
- Housing
- Seat seal
- Valve cone
Additional options
- Flow divider for noise reduction
- Aseptic version with shaft vapor barrier (DPF)
- Aseptic version with membrane (RGMS4 –RGEMS4)
- Various types of positioning devices
Benefits and Features
- Profile seals with identification markings to eliminate backlash and facilitate spare parts ordering;
- Flexible design - shaft and seat change to varying Kvs values (engineered modular system);
- Easy maintenance - valve insert can be completely removed;
- Design tested to DIN IEC 534;
- All parts in contact with the product are AISI 316L / DIN EN 1.4404 stainless steel.
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