Product Overview

2 G196 Series BASOTROL Redundant Combination Gas Valve with Manual Shutoff Valve Product Bulletin
Product Overview
Application
The G196 valves can use natural gas, Liquefied
Petroleum (LP) gas, or LP gas-air mixtures at
pressures up to 0.5 psi (35 mbar [3.5 kPa]). Valves
with nitrile diaphragms are suitable for operation
over a temperature range of -20 to 175°F (-29 to
79°C). Valves with silicone diaphragms are suitable
for operation over a temperature range of
-40 to 175°F (-40 to 79°C).
Note: This unit should be used only in applications
that are within the limitations and provisions of the
applicable American National and/or
Underwriters Laboratories® (UL) Inc. standards.
Valve Operation
The G196 is a redundant automatic gas valve that
controls the pilot gas and the main burner gas on
electronic intermittent proven pilot ignition systems.
It can also control only main burner gas on direct
ignition systems. In either application, main gas
flows through both valve seats (redundancy).
The manual A valve is a tapered plug design with
positive shutoff. When the manual A valve is off, gas
does not enter the valve body. When the manual A
valve is on, gas flow through the valve depends on
the type of ignition system used.
Intermittent pilot ignition systems energize the pilot
valve first, and gas flows through the pilot outlet
connection to the pilot burner. When the pilot flame
is proven, the ignition control energizes the main
valve, supplying gas to the main burner.
Direct ignition systems energize both valve
operators simultaneously so that gas flows through
the valve to the main burner for ignition.
In either intermittent pilot or direct ignition systems,
the G196 offers redundant main gas shutoff because
the valve seats are in series. Refer to Figure 3 for
wiring diagrams of each ignition system.
Valve Constructions
The G196 Series is available with 1/2 x 1/2 in.,
1/2 x 3/8 in., or 1/2 x 3/4 in. body connections with a
25 VAC 2-wire magnetic operator. Refer to the
Ordering Information section for more information.
Magnetic Operator Cover Styles
An aluminum magnetic operator cover with conduit
hub and 30 in. (762 mm), 18 AWG stranded lead
wire is supplied as standard on all line-voltage
models. The leads and hub position may be located
at the top, over the inlet, on the right side, or on the
left side of the valve. Lead wires with 1/4 in.
(6.35 mm) quick-connect terminals are also
available.
The UL Listed steel operator cover is available with
a top conduit hub only.
A plastic magnetic operator cover with 1/4 in.
(6.35 mm) quick-connect male terminals is supplied
as standard on all low-voltage models. However, an
aluminum or steel operator cover with conduit hub is
available.
Contact BASO Gas Products for details and ordering
of magnetic operator cover style and wiring
requirements.
Regulator/Pilot Tap Options
The G196 is designed for various configurations.
The lever-acting or direct-acting regulator and right-
or left-hand pilot tap options take advantage of
space or access limitations. The small swing radius
makes installation easy.
Seal Screw
Manual
Shutoff
Valve
Inlet
Pressure
Tap
Pressure
Regulator
Stack
Outlet
Pressure
Tap
1/4 inch c.c.
Pilot Tap
(If Required)
Figure 2: Component Identification