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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.

Specification

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.) HNBR, Temp. range: -40˚F to +325˚F (opt.)
Length (with lens)	6.10”
Diameter	1.50”
Height (with manifold) (with bypass valve)	2.26” 3.70”
Connections	1/4” FNPT
Weight (with manifold) (with bypass valve)	3.0 lb 3.5 lb

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.

ADDITIONAL INFORMATION

NOTES:
1. Standard O-ring material is Viton®. BUNA-N is
available as an option.
2. See manifold drawings for more details.