Model 20RI Receiving Indicating Relay

DESCRIPTION

The NUTECH Model 20RI is a panel-mounted, 
pilot-operated, two-way indicating pneumatic relay 
normally used as a first-out indicating and control 
device. It receives a pressure signal from an end 
device. When the signal pressure from the end 
device is reduced, the spool shifts, and the control 
signal is exhausted. The affected relay displays a 
“red”indication.

FEATURES

Manifold design allows close coupling of individual 
relays within a group, thus reducing space 
requirements; also provides reduction in installation 
cost by reducing installation labor and the number of 
fittings required.
The optional bypass valve further reduces cost with 
its “fitting-free” mounting.
Screw-on rear cap assembly provides for simplified 
field maintenance.
Routine maintenance procedures can be performed 
without removing the device from its mounting in 
most applications.

SPECIFICATIONS

Operating pressure range 25-50 psig 
Material 316 SS per ASTM A-276 
O-ring Viton®
, Temp. range -15˚F to+400˚F (std.) 
 BUNA-N, Temp. range -65˚F to+215˚F (opt.)
Length (with lens) 6.10”
Diameter 1.50”
Height (with manifold) 2.26” 
 (with bypass valve) 3.70”
Connections 1/4” FNPT
Weight (with manifold) 3.0 lb
 (with bypass valve)