Model 20TI-Transmitting Indicating Relay

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DESCRIPTION

The NUTECH Model 20TI is a panel-mounted, pilot-operated, two-way indicating pneumatic relay normally used as a first-out indicating and control device. It transmits a pressure signal to a normally closed vent-type end device. When the end device opens (trips), the transmitted pressure signal is reduced, allowing the spool to shift and the control signal to be exhausted. The affected relay displays “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.

*See PDF for specifying ordering information