Type 650 Positive Bias Relay

Output pressure from input signal plus a preset bias

The Type-650 positive bias relay is a signal operated regulator that provides an output pressure that is the sum of the input signal pressure plus a preset bias. The unit allows flow capaci ties up to 50 SCFM with minimal pressure drop. An aspirator tube at the output maintains the set pressure under varying flow conditions by causing the main supp!y valve to open and close proportionally to the flow demand. There is a choice of four adjustment ranges for the positive bias settings. This unit is most often used for conversion of a low flow control signal to the higher flow requirements of an operating system

T650 Specifications
Short form specification
Adobe Acrobat document [34.0 KB]
T650 Positive Bias Relay
Specification -Data sheet
Adobe Acrobat document [606.7 KB]
T650 Instructions
Instruction manual
650_ instr.pdf
Adobe Acrobat document [459.8 KB]


We're always happy to discuss our extensive range of products, or your application.

Contact us on:


Email: sales@proportionair.eu




+44 (0) 2477671600

+353 (0) 860798070


001 5135050877


RIBA - Type RP200 


Precision pressure regulator 1/8" connection


RP200 serves flow control up to 300 l/min.
The large control range from vacuum to 70 bar overpressure of this regulator facilitates a broad spectrum of applications.




Vacuum to High Precision

Back Pressure Regulators

Low flow to High flow

Wide range of materials of construction to meet specific application requirements




Resolutionair Pinch Valve

Proportional Pinch Valve step and motor Linear actuator technology .0005"/step linear travel.

Print | Sitemap