Product Overview

2 H17 Series BASO Automatic Shutoff Pilot Gas Valve Product Bulletin
Product Overview
Application
The H43 valve is designed to provide safe lighting
and complete shutoff of pilot and main burner gas.
An interlock between the manual valve handle and
the reset button allows gas flow only to the pilot
during pilot lighting. The control shuts off both main
and pilot gas if the pilot flame is extinguished. The
manual valve controls both main and pilot gas.
H43 valves are suitable for use with natural gas,
Liquefied Petroleum (LP), and LP gas-air mixtures at
pressues up to 0.5 psi (35 mbar). Models H43_A
with a standard power unit are suitable for operation
over a temperature range of 32 to 175˚F (0 to 79˚C).
Models H43_B with a high temperature power unit
are suitable for operation over a temperature range
of 32 to 250˚F (0 to 121˚C).
Description
The H43 valve contains a plug valv with multiple
drillings, which allows it to serve as both the main burner
valve and pilot valve. The valve handle indicates the
operating position. Safe lighting is accomplished by a
positive interlock between the valve handle and reset
button, which allows for resetting the valve to the pilot
position only. The handle incorporates a lock button to
prevent accidentally turning off the valve. The lock
button must be lifted to permit turning the plug valve to
the Off position. The main burner may be throttled
between the On and Pilot position through the use of the
handle.
In the event of pilot flame outage, gas is shut off both to
the main burner and pilot burner. The handle must be
turned to the Pilot position to reset the valve and light the
pilot burner. The pilot outlet is located on the right-hand
sisde of the valve casting, when looking into the inlet of
the control with the reset button up. The pilot connection
is 1/4 cc. It flows toward the inlet of the control and is
regulated with a pilot adjustment screw. The pilot
connection is also available with the flow toward the
outlet of the control (Contact BASO Gas Products.)
Mounting
H43 valves may be mounted in any position with the
reset button and manual valve handle accessible.
Shutoff Valve
3 in. (76.2 mm)
Sediment Trap
Thermocouple
Lead
Pilot Burner
Gas Line
X
X
Reset Button
Handle and
Lock Pin Assembly
X indicates possible
locations for other controls.
Figure 2: Typical H43 Installation