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RDR Pressure Regulator for Circular Pipeline

Modular pressure regulator for ring line with pre-pressure regulator function

RDR Pressure Regulator for Circular Pipeline

Modular pressure regulator for circular pipeline with pre-pressure regulator function

Diaphragm pressure regulator / inlet pressure regulator / pressure regulator for circular pipeline

for paint systems, e.g. in the automotive industry, dispensing and material supply systems.


Advantages and functions

  • Sustainable design structure (same top and bottom part for all RDR and RKR variations)
  • Compact design for manual/spring-actuated and pneumatic variations
  • Compatible with all conical sealing fittings in the painting industry
  • Chemical resistant ceramic sealing seat available (safe use with high solid paints)
  • Compatible with cutting ring fittings, Eco-Tube fittings of thread size G3.8f and G1.2f
  • Flexible installation options due to selectable material flow direction (side inlet, bottom inlet)
  • Variable accessory mounting options (pressure gauge connection, pressure sensor)
  • Adaptation possibilities at materia input and materia output of G3.8f to G1.4c, G3.8c, G1.2f
  • Leakage connection as optical control in case of malfunction



  • Diaphragm pressure regulator / inlet pressure regulator
  • Suitable for use in EX areas
  • Manual/spring operated or pneumatic 1:3
  • Pneumatic metering for installation in material flow lines e.g. circular pipelines
  • Three seal sets selectable (O-ring, ceramic, plastic)
  • Depending on the type of system, the most suitable seal set can be selected for the desired function
  • Selectable ball size (Ø 6.35 / Ø 8) depending on flow rate


Complete solutions from a single source

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We offer our own products for the entire process chain in surface technology, which have already been used in numerous projects by us or other companies.

Technical data

Top part type manual/spring operated
Size/installation space without connection fittings
ØA: 80mm, H: 136mm
Weight top part
Input pressure (approx.)
8 bar | 16 bar | 20 bar
Output pressure (approx.)
0-4 bar | 1-10 bar | 1-16 bar
Top part type pneumatic 1/3
Size/installation space without connection fittings
ØA: 110mm, H: 75mm
Weight top part
Input pressure (approx.)
up to 24 bar
Output pressure (approx.)
1-18 bar
Operating pressure air (approx.)
0-6 bar
Temperature range
10°C to 40°C
Wetted parts air
Aluminum / anodized aluminum, nickel-plated brass, PTFE, POM
Wetted parts media
Stainless steel, FFKM, ceramic, PEEK
Ball sizes
Ø 6,35 / Ø 8
Available seal kits
Ceramic, plastic, O-ring
Material connections and connection
Direction selectable/configurable
Material input G3.8f
side, bottom
Material output G3.8f
Other connections
Control air
G1/8“ (thread length: 6mm) - 6x4
Material lock
M5 (thread length: 5mm) - 6x4