Model 20TI Transmitting Indicating Relay

DESCRIPTION

The NETECH 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 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) 3.5 lb